A 12.2-g sample of x reacts with a sample of y to form 78.9 g of xy. what is the mass of y that reacted?
The mass of Y that reacted is 66.7 g.
Explanation:In compound X, the mass ratio of carbon to hydrogen is 14.13 g C : 2.96 g H. This number ratio supports the law of multiple proportions, indicating that X and Y are different compounds. To find the mass of Y that reacted, you can subtract the mass of X from the total mass of XY:
Mass of Y = Total mass of XY - Mass of X
Mass of Y = 78.9 g - 12.2 g
Mass of Y = 66.7 g
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Which of the following force pairs are an example of Newton’s 3rd Law? Select all that apply. The earth pulls down on the chair./The ground pushes up on the chair. The bat hits the baseball forward./The baseball hits the bat backwards. The boy pushes rightward on the box./Friction resists the motion leftward on the box. The bee hits the windshield northward./The windshield hits the bee southward. The rope pulls the box upward./The earth pulls the box downward.
Answer:In the series of Newton's Laws of Motion, the third one is the Law of Interaction. This states that for every action there is always an equal and opposite reaction. The forces are termed as "action" and "reaction" forces. These forces have numerically equal magnitudes but opposite in direction.
From the examples given above, those that fall to this category are: (1) The motion of the bat and the baseball as described above, and (2) the motion of the bee and the windshield.
Explanation:
HELP ASAP
Which of the following is the best description of the components of a biological community in the Yellowstone National Park?
A) the bison in Yellowstone
B) the bison and aspen in Yellowstone
C) the bison, aspen, and thermal features in Yellowstone
D) the bison, elk, aspen, and microorganisms in Yellowstone
E) the bison, elk, aspen, microorganisms, and season summer rainfall in Yellowstone
The best description of the components of a biological community in the Yellowstone National Park is the occurance of the bison, elk, aspen, and microorganisms in Yellowstone. Hence Option (D) is correct.
What is Biological Community ?A community could be a cluster or association of populations of 2 or a lot of totally different species occupying an equivalent geographic area at an equivalent time, conjointly called a biocoenosis, grouping, biological community, ecological community, or life assemblage.
Biological Community is vital as a result of it permits species interaction.
Species move at intervals a community for varied reasons, and one among them is nutrition. Animals, as an example, don't seem to be capable of creating their own food and so have to be compelled to suppose plants and alternative animals for nutrition.
Therefore, The best description of the components of a biological community in the Yellowstone National Park is the occurance of the bison, elk, aspen, and microorganisms in Yellowstone. Hence Option (D) is correct.
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What is the relationship between the electronic structure of a carbon atom and the variability of organic compounds?
Describe the physical properties of each state of matter
Which type of bond would most likely form between lithium and fluorine to make lithium fluoride?
Which quantity expresses the sum (2.1 g + 33.566 g + 12.22 g) to the proper degree of precision
First let us get the sum of the numbers.
2.1 g + 33.566 g + 12.22 g = 47.886 g
Now to get the proper degree of precision, the amount of decimal places should be equal to the least decimal places of the numbers that were added. In this case, 2.1 g has the least number of decimal places which is equal to 1, hence the correct answer is:
47.9 g
The sum of (2.1 g + 33.566 g + 12.22 g) to the proper degree of precision is 47.9 g.
Explanation:The sum of (2.1 g + 33.566 g + 12.22 g) to the proper degree of precision is 47.886 g. The numbers given in the question have different decimal places. To determine the proper degree of precision, we look at the least precise measurement, 2.1 g, expressed to the tenth place. Therefore, the final answer should be rounded to the tenth place, giving us 47.9 g.
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Which statement is true about both a solid and a gas? A. They both fill a container. B. The both have defined shapes in any space. C. The atoms of both are moving. D. There is never any motion in either. PLEASEEE HELP PLEASEEEEEEEEE
Answer: Option (C) is the correct answer.
Explanation:
In a solid, molecules are held together by strong intermolecular forces of attraction. As a result, they are unable to move from their initial place but they can vibrate at their mean position.
Hence, in solid substances the molecules have low kinetic energy and they have fixed shape and volume.
In gases, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move rapidly from one place to another leading to more number of collisions.
Hence, gases are able to expand more rapidly as compared to liquids and solids.
Thus, we can conclude that the statement atoms of both are moving, is true about both a solid and a gas.
Describe how you could find the mass of the irregular object without use of a balance
Grapefruit juice is approximately ph 3, and tomato juice is approximately ph 4. a glass of grapefruit juice contains _____ h+ as a glass of tomato juice.
A glass of grapefruit juice contains ten times more H+ than a glass of tomato juice.
How many H+ ions are in a specific pH?The pH of any solution is determined with the help of hydrogen ion concentration. For example, if a neutral solution has a pH of 7, it means that the concentration of H+ ions is [tex]10^-^7[/tex]. In other words, it may contain 0.0000001 mol of hydrogen ions in a solution of 1 liter.
According to the question,
The pH of Grapefruit juice is = 3
The concentration of H+ ions = [tex]10^-^3[/tex] = 0.001 mol.
The pH of Tomato juice = 4.
The concentration of H+ ions = [tex]10^-^4[/tex] = 0.0001 mol.
From the above concentration of both hydrogen ion concentrations, it is clearly illustrated that a glass of grapefruit juice contains ten times more H+ than a glass of tomato juice.
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(10 Points) It is thought that the strongest intermolecular forces between molecules of NO are
a. Covalent Bonds
b. Dipole dipole interactions
c. London Dispersion
d. hydrogen bonds
e. ionic bonds
My guess is B but can someone explain it to me please?
The strongest intermolecular forces between molecules of NO are dipole-dipole interactions NO. The correct answer is option b.
Intermolecular forces are the attractive forces that exist between molecules and affect the physical properties of substances.
NO is a polar molecule due to the difference in electronegativity between nitrogen and oxygen atoms. This means that the molecule has a positive and negative end, or dipole.
Dipole-dipole interactions occur between polar molecules and are the result of the attraction between the positive end of one molecule and the negative end of another. These interactions are stronger than London dispersion forces, which occur between nonpolar molecules, because the polarity of the molecules allows for a stronger attraction.
On the other hand, NO does not have hydrogen bonding because it does not contain hydrogen atoms bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.
NO also does not have covalent, ionic, or metallic bonding because these types of bonding occur within a molecule, not between molecules.
Therefore, dipole-dipole interactions is the strongest intermolecular forces between molecules of NO. Option b is the correct answer.
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Why is the nacl extracted with water three times as opposed to only once?
NaCl is extracted multiple times with water to ensure more complete dissolution and improved recovery, as well as to remove impurities for a purified product.
The reason NaCl is extracted with water three times as opposed to only once is primarily due to the principle of solute recovery or purification. When a soluble substance like NaCl is dissolved in water, it may not fully dissolve in a single extraction. By performing multiple extractions, you ensure a more complete dissolution or recovery of the NaCl, which improves the efficiency of the extraction process. Additionally, repeated extractions can help remove impurities that are less soluble in water. Each subsequent extraction with fresh water removes a fraction of the remaining solute and any impurities, leading to a purified product.
Why a preservative not added when preparing non aqueous drug solution?
The "particles" of a gas are actually protons or electrons. true or false
How many electrons are shown in iodine electron dot structure?
The electron dot structure of iodine shows seven dots surrounding the 'I' symbol. Each dot represents one valence electron in the outermost shell. This represents iodine in a neutral state, not involved in a bond.
Explanation:The iodine atom is represented in an electron dot structure, also known as a Lewis dot structure, by the symbol 'I' surrounded by seven dots. Each dot represents one valence electron. Iodine belongs to group 17 (Halogens) in the periodic table and has 7 valence electrons in its outermost shell. The aim of the Lewis dot structure is to show the valence electrons that participate in forming bonds in compounds.
In the case of iodine, until it gains an electron to obtain a stable configuration, its Lewis dot structure will show seven valence electrons as dots around the symbol 'I'. This applies to all neutral atoms of iodine not involved in a chemical bond. When iodine forms a compound, the electron dot structure could be different, as it would show how the electrons are shared or transferred.
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What is the mass and charge of an electron
Answer:
Charge of -1 and a mass of 1/1836 amu
Explanation:
Write a balanced chemical reaction for the dissolution of your copper oxide sample in hydrochloric acid
Final answer:
When copper(II) oxide (CuO) is mixed with hydrochloric acid (HCl), it dissolves to form copper(II) chloride (CuCl2) and water (H₂O). The reaction is represented by the balanced chemical equation: CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(l), demonstrating an acid-base interaction resulting in salt and water.
Explanation:
When copper(II) oxide (CuO) dissolves in hydrochloric acid (HCl), a reaction occurs that forms copper(II) chloride (CuCl₂) and water (H₂O). This reaction is a type of double displacement reaction where the anion from the acid (Cl⁻) swaps with the anion of the base (OH⁻ from Cu(OH)₂), resulting in the dissolution of copper oxide in the acid. It's important to ensure the chemical equation is balanced to accurately represent the conservation of mass principle.
Steps to Balance the Equation
Write the unbalanced equation: CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(l)Check the balance of atoms on both sides of the equation. The copper (Cu), chlorine (Cl), oxygen (O), and hydrogen (H) atoms need to be equal on both sides.Adjust coefficients to balance the equation. Given the unbalanced equation already has the correct coefficients, it is therefore balanced as is.The correctly balanced equation representing the dissolution of copper(II) oxide in hydrochloric acid is: CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(l). This equation illustrates the interaction between a base (CuO) and an acid (HCl) that produces a salt (CuCl₂) and water, exemplifying an acid-base reaction.
What is the frequency of electromagnetic radiation having a wavelength of 3.27 ✕ 10-8 m? s-1 What type of electromagnetic radiation is this?
What are the advantages and disadvantages of using a net ionic equation to represent a chemical change rather than a molecular equation?
Advantage: Net ionic equations focus on the essential chemical species involved, simplifying complex reactions.
Disadvantage: They may omit important details, making them less suitable for comprehensive analysis.
Advantages of using a net ionic equation to represent a chemical change:
Clarity and Simplicity: Net ionic equations focus on the species that are directly involved in the chemical reaction, ignoring spectator ions that do not participate. This simplifies the equation, making it clearer and easier to understand.Emphasis on Reactants and Products: Net ionic equations emphasize the actual chemical change by showing the relevant ions or molecules that undergo transformation. This helps in identifying the key species involved.Balancing: Net ionic equations are often easier to balance because they only involve the species that participate in the reaction. This simplifies the process of ensuring that mass and charge are conserved.Useful for Identifying Reaction Type: Net ionic equations can help in identifying the type of chemical reaction (e.g., precipitation, acid-base, redox) more readily because they highlight the relevant ions or molecules.Disadvantages of using a net ionic equation:
Incomplete Picture: While net ionic equations focus on the key species involved in a reaction, they do not provide a complete picture of the reaction. They omit spectator ions, which are essential for understanding the stoichiometry of the reaction.Limited Applicability: Net ionic equations are most useful for reactions that occur in solution, particularly in aqueous solutions. They may not be as applicable to reactions in other phases or non-aqueous environments.Limited Information: Net ionic equations do not provide information about the physical state (solid, liquid, gas) or the molecular structure of the species involved. Molecular equations or complete ionic equations may be needed for this information.May Require Additional Information: In some cases, particularly complex reactions, the net ionic equation alone may not provide sufficient information to fully understand the reaction. Additional contextual information or complete ionic equations may be needed.Learn more about Net Ionic Equation here:
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A net ionic equation provides a more concise representation of a chemical change by excluding spectator ions, making it easier to analyze and understand the reaction. However, it may overlook important information such as the overall ionic balance and the presence of certain ions. Molecular equations provide a more complete picture of the reactants and products, including all ions.
Explanation:A molecular equation represents a chemical change by showing all reactants and products as neutral substances. On the other hand, a net ionic equation only includes the dissolved ionic reactants and products that undergo a chemical or physical change, excluding spectator ions.
The advantage of using a net ionic equation is that it provides a more concise representation of the actual chemical change, focusing on the substances that are directly involved. This can make it easier to analyze and understand the reaction. Additionally, net ionic equations are particularly useful in determining the type of reaction, such as precipitation, acid-base, or redox reactions.
However, there are also disadvantages to using net ionic equations. By excluding spectator ions, some important information may be overlooked, such as the overall ionic balance and the presence of certain ions. Molecular equations, on the other hand, provide a more complete picture of the reactants and products, including all ions present in the reaction.
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When substances go through chemical changes, which of the following will always happen?
A.
One or more substances with different chemical properties will form.
B.
One or more substances will be completely destroyed.
C.
A poisonous gas will form or a white solid will precipitate.
D.
all of these
Answer: A. One or more substances with different chemical properties will form.
Explanation:
Chemical change is defined as a change in which rearrangement of atoms take place and leads to formation of new substance. Thus as new substances are formed, the chemical properties of the products will alwys be different from the chemical properties of reactants.
Physical change is defined as a change in which change in shape, size or state of the substance takes place. No new substance is formed.
Chemical change may involve following changes:
1) Formation of precipitates
2) Absorption or evolution of heat
3) Color change
4) Evolution of gas
Write a generic equation that can be used to convert the mass of a substance to volume using density.
What is the lowest atomic number a new element can have
The lowest atomic number a new element can have is 119 as 118 elements are known .
What is atomic number?Atomic number are defined as a chemical element's number in the periodic system, which places the elements in ascending order of the number of protons in their nuclei.
It can also be defined as the charge number of an atomic nucleus is represented by the nuclear charge number (symbol Z) of a chemical element.
Elements are defined as a pure substance made up only of one sort of atom, each of whose nuclei contains the same number of protons.
It can also be defined as a substance that chemistry cannot divide into simpler substances.
There are three types of elements.
Metals Non metals MetalloidsThus, the lowest atomic number a new element can have is 119 as 118 elements are known .
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What is the mass number of an iron atom that has 28 neutrons?
The mass number of an iron atom is calculated by adding the number of protons and neutrons. Since an iron atom universally has 26 protons and this particular atom has 28 neutrons, the mass number is 26+28=54.
Explanation:The mass number of an atom is determined by adding the number of protons and neutrons in the nucleus of the atom. Iron (Fe) universally has 26 protons. In the given case, an iron atom has 28 neutrons. Therefore, to find the mass number, you will add the number of protons (26) to the number of neutrons (28).
So, Mass Number = Number of Protons + Number of Neutrons = 26 + 28 = 54.
Therefore, the mass number of an iron atom with 28 neutrons is 54.
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Calculate the number of moles of hcl in 25.50 g of 1.0 m hcl solution. assume that the density of the hcl solution is 1.00 g/ml.
Combustion analysis of toluene, a common organic solvent, gives 3.52 mg of co2 and 0.822 mg of h2o. if the compound contains only carbon and hydrogen, what is its empirical formula?
If a sulfur ion with 16 protons and 17 electrons loses one electron, what is the resulting charge?
When a sulfur ion with 16 protons and 17 electrons loses one electron, the resulting charge is 0. This is because the number of protons equals the number of electrons, resulting in no overall charge.
Explanation:The question here asks: If a sulfur ion has 16 protons and 17 electrons and this ion loses one electron, what is the resulting charge? In order to answer this, it's important to understand that the charge of an ion is determined by the difference between the number of protons and the number of electrons. Initially, the sulfur ion had one more electron than protons, giving it a charge of -1.
However, when it loses an electron, the number of protons and electrons equal each other, resulting in a neutral ion with a charge of 0. Therefore, when a sulfur ion with 16 protons and 17 electrons loses one electron, the resulting charge is 0. This is because the number of negatively charged electrons now equals the number of positively charged protons, resulting in no overall charge.
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The isotope 65 29cu2+ has how many electrons and how many protons?
How many grams of magnesium oxide forms when 8.0g of magnesium are burned?
When 8.0 grams of magnesium are burned, approximately 13.26 grams of magnesium oxide are formed following the chemical reaction 2Mg(s) + O2(g) → 2MgO(s). This calculation is based on finding the equivalent moles of magnesium and magnesium oxide using their respective molar masses.
Explanation:The question involves a chemical reaction where magnesium (Mg) is burned or reacts with oxygen to form magnesium oxide (MgO). The balanced chemical equation for this reaction is 2Mg(s) + O2(g) → 2MgO(s).
We first need the molar mass of magnesium (Mg) and magnesium oxide (MgO) to perform these calculations. The atomic mass of magnesium is 24.305 g/mol and for oxygen it's 16 g/mol. Therefore, the molar mass of magnesium oxide (MgO) is 40.305 g/mol (24.305 g/mol for Mg + 16 g/mol for O).
Next, we are given 8.0 grams of magnesium (Mg). Using its molar mass, we find this is roughly 0.329 moles of Mg (8.0g ÷ 24.305g/mol).
According to the balanced chemical equation, the stoichiometric ratio between Mg and MgO is 1:1. Therefore, 0.329 moles of Mg would react to form 0.329 moles of MgO. Converting this to grams using the molar mass of MgO (40.305 g/mol), we find that about 13.26 grams (0.329 mol × 40.305 g/mol) of magnesium oxide are formed when 8.0 grams of magnesium are burned.
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Final answer:
To determine how many grams of magnesium oxide are produced when 8.0g of magnesium are burned, the stoichiometry of the reaction between magnesium and oxygen to form magnesium oxide is analyzed. Using molar masses and the balanced chemical equation, approximately 13.26g of magnesium oxide is calculated to be produced.
Explanation:
The question concerns the chemical reaction between magnesium and oxygen to form magnesium oxide (MgO). This reaction is a classic example of a synthesis reaction where two elements combine to form a compound. In a balanced chemical equation, magnesium (Mg) reacts with oxygen (O2) to produce magnesium oxide (MgO). The balanced equation for this reaction is: 2Mg + O2 → 2MgO.
To determine how many grams of magnesium oxide forms when 8.0g of magnesium are burned, we must first understand the stoichiometry of the reaction. Since one mole of magnesium reacts with half a mole of oxygen to produce one mole of magnesium oxide, the mass of magnesium oxide produced can be calculated using molar masses and stoichiometric ratios. Given that the molar mass of magnesium is approximately 24.305 g/mol and that of magnesium oxide is approximately 40.30 g/mol, the calculation involves converting grams of magnesium to moles, then using the stoichiometric ratios from the balanced equation to find the moles of magnesium oxide produced, and finally converting this amount back to grams.
Given 8.0g of Mg, the moles of Mg can be calculated as 8.0g / 24.305 g/mol = 0.329 moles. From the balanced equation, it is clear that the moles of MgO produced would be the same (because the ratio of Mg to MgO in the reaction is 1:1), therefore, 0.329 moles of MgO. The mass of MgO produced can then be calculated as 0.329 moles × 40.30 g/mol = approximately 13.26g.
how do you preform water displacement
Give an example of how environmental science might involve geology and chemistry.
Environmental science often integrates geology and chemistry to study and address environmental issues.
For example, in the context of water pollution, geology helps assess the types of rocks and soils present in an area, influencing water quality and contamination risks.
Chemistry analyzes the composition of pollutants and their reactions in aquatic systems, identifying harmful substances. Together, geology and chemistry help understand the sources, movement, and transformation of pollutants in groundwater and surface water.
This knowledge guides strategies for pollution prevention, cleanup, and sustainable water resource management, demonstrating how the combination of geology and chemistry contributes to effective environmental science solutions.
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Final answer:
Environmental science intertwines geology and chemistry through the study of weathering processes, where the breakdown and chemical transformation of rocks at Earth's surface illustrate the interplay between geological formations and chemical reactions.
Explanation:
An example of how environmental science might involve geology and chemistry is seen in the study of weathering processes. Weathering, a critical geochemical process, illustrates the interaction between Earth's geological and chemical elements. The decomposition and alteration of rocks and minerals at the Earth's surface involve both the physical breakdown (geology) and chemical transformations (chemistry), significantly influenced by water, air, and biological activity.
Particularly, chemical weathering involves the molecular breakdown of minerals, which changes their chemical composition under the influence of water and atmospheric gases. This process is pivotal for soil formation and nutrient cycling, thus demonstrating the intricate connections between geology and chemistry in environmental sciences.
Moreover, the application of geochemical methods in identifying and analyzing mineral content in ore bodies integrates geology and chemistry. Geologists use chemical information about minerals from specific locations to infer the ecological and environmental processes at play. This integration facilitates a deeper understanding of Earth's resources and environmental challenges, highlighting the importance of interdisciplinary approaches in solving complex ecological problems.