_____ is the degree of attraction of one atom for the valence electrons of another atoms. Electronegativity Ionization energy Covalent bonding Ionic bonding
In order to climb a steep hill on a bicycle, a rider shifts to the lowest gear. The lowest gear has the greatest mechanical advantage because it
The answer to your question is (B) because it does requires the least amount of force for the bicycle to climb the hill.
When is a sample of matter considered a pure substance?
A pure substance is a sample of matter with a constant composition and with all specimens possessing the exact same properties. Pure substances can either be elements, with only one type of atom, or compounds, composed of two or more types of atoms.
Explanation:A sample of matter is considered a pure substance when it has a constant composition and all specimens have exactly the same properties. Pure substances can be classified into two categories: elements and compounds. Elements are pure substances that consist of only one type of atom and cannot be broken down by a chemical change while compounds are pure substances that consist of two or more types of atoms. For instance, any sample of sucrose (table sugar) is a pure substance consisting of 42.1% carbon, 6.5% hydrogen, and 51.4% oxygen by mass, having the same physical properties like melting point, color, and sweetness, irrespective of its source.
Learn more about Pure Substance here:https://brainly.com/question/34411814
#SPJ12
How many atoms of each element are in the chemical formula P2O5?
Answer:
There are two P (phosphorous) atoms and five O (oxygen) atoms.
Explanation:
The subscripts of each element represent the number of atoms of that element in the molecule.
Atom is the smallest unit of matter. An element is made of identical atoms.
A molecule is made up of more than one different element. And there are more than one atoms of each element in the molecule.
_______________ reactions transfer energy to the surroundings, usually as heat.
For a neutral atom, the number of ____ is also equal to the atomic number.
In a neutral atom, the number of protons equals the atomic number, which also indicates the same number of electrons.
Explanation:For a neutral atom, the number of protons is also equal to the atomic number. Atoms are neutral in electrical charge because they have the same number of negative electrons as positive protons. Therefore, the atomic number of an atom also tells you how many electrons the atom has. For instance, hydrogen has an atomic number of 1, which means it has 1 proton and 1 electron. Manganese, with an atomic number of 25, has 25 protons and also 25 electrons when neutral. The atomic number not only signifies the number of protons in an atom but also, by default, the number of electrons in a neutral atom.
2. Electron A falls from energy level X to energy level Y and releases blue light. Electron B falls from energy level Y to energy level Z and releases red light. Which transition, from X to Y or from Y to Z, has a greater energy difference? Explain your answer and how you arrived at it. Use a diagram of the electromagnetic spectrum.
The answer is transition from Y to Z, has a greater energy difference because the red light means higher energy and the blue light means lower energy.
You would be able to find this on the diagram of electromagnetic spectrum.
PLLLLLLZZZZ BRAINLEST!!!!!!!!!!!!!!!!!!
how many significant figures in 11 soccer players
What is the empirical formula for propene (C3H6)?
Answer:
CH2
Explanation:
Divide by 2 and you get the answer
What celsius temperature, t2, is required to change the volume of the gas sample in part a (t1 = 43 ∘c , v1= 1.13×103 l ) to a volume of 2.26×103 l ? assume no change in pressure or the amount of gas in the balloon?
The Celsius temperature required to change the volume of the gas sample to a specific volume at constant pressure can be found using Charles's Law. In this case, the temperature, volume, and initial conditions are given, allowing us to solve for the unknown temperature. By substituting the values into the formula, we find that the required temperature is 316 K.
Explanation:A volume change caused by a temperature change at constant pressure means we should use Charles's law. Taking V₁ and T₁ as the initial values, T2 as the temperature at which the volume is unknown and V₂ as the unknown volume, and converting °C into K we have:
T₂ = (T₁ * V₂) / V₁
Substituting the given values:
T₂ = (43 + 273) * (2.26 × 10³) / (1.13 × 10³)
T₂ = 316 K
Learn more about Charles's Law here:https://brainly.com/question/16927784
#SPJ11
To change the gas volume from 1.13×10³ L at 43°C to 2.26×10³ L, the required temperature is 359°C. This is calculated using Charles's Law and converting temperatures between Celsius and Kelvin.
Calculating the Required Temperature Using Charles's Law
To solve this, we will use Charles's Law, which states that the volume of a gas is directly proportional to its temperature (in Kelvin) when pressure and the amount of gas are constant. The formula for Charles's Law is:
V₁ / T₁ = V₂ / T₂
First, we convert the temperatures from Celsius to Kelvin:
T₁ = 43°C + 273 = 316 K
Next, we rearrange Charles's Law to solve for T₂:
T₂ = (V₂ × T₁) / V₁
Substitute the known values into the equation:
T₂ = (2.26×10³ L × 316 K) / 1.13×10³ L
T₂ = 632 K
Finally, convert the temperature from Kelvin back to Celsius:
T₂ = 632 K - 273 = 359°C
Thus, the required temperature t₂ is 359°C.
Why does a primary alochol have a higher boiling point than a secondary alcohol?
Net ionic equations do all reactant species participate in a reaction answers
As water freezes or evaporates, what happens to the salinity of the remaining ocean water?
As water freezes or evaporates, the salinity of the remaining ocean water increases. This is due to the separation of pure water molecules from the dissolved ions during both evaporation and the crystallization process of freezing, leaving behind a higher concentration of salts in the water.
Explanation:When water freezes or evaporates, the salinity of the remaining ocean water increases. During the process of evaporation, only the water molecules transition from a liquid state to gas and subsequently condense to form clouds, leaving the dissolved ions like salt behind. This concentration effect also occurs when water freezes. Ice crystallizes and incorporates very little of the dissolved salts, thus also leaving behind more concentrated salty water.
In the context of desalination, one can observe how these natural processes of phase change can separate the water from its dissolved substances. While the evaporative process is a distillation that produces almost pure water, the freezing process excludes salts from the solid ice phase. As a result, methods such as evaporation, condensation, and freezing are employed to purify water and reduce its salinity.
Moreover, in temperature dynamics during the freezing of water, the heat released keeps the temperature steady at the melting point while the rest of the water turns into ice. This phenomenon has implications for the thermodynamic properties of water and how such changes affect the surrounding environment.
Which of the following is NOT a part of Dalton's atomic theory?
Select one:
a. atoms of the same elements are identical
b. all elements are composed of atoms
c. atoms combine in simple whole number ratios
d. atoms are always in motion
atoms are always in motion. i took the test and got it correct
Answer:
The correct answer is (D) Atoms are always in motion is not a part of Dalton's atomic theory because Dalton never sated about atomic motion in his atomic theory. Other options are the part of Dalton's atomic theory.
Explanation:
According to Dalton's atomic theory:
1. Every element is made up of tiny atoms.
2. The atom of the same element shares the same property.
3. The atoms of different elements differ in properties.
4. Atoms cannot be seen and are indestructible.
Dalton never describe the motion of atoms in his theory
for more details you can refer to the link:
https://brainly.com/question/13571237?referrer=searchResults
Which figure is the percent of energy at which one trophic level generally flows to the next level?
1)10%
2)35%
3)50%
4)100%
About 10% of the energy at one trophic level is transferred to the next, with the rest being used for metabolism or lost as heat, explaining why there are typically no more than four trophic levels in a food chain. Hence option A is correct.
The figure that represents the percent of energy transferred from one trophic level to the next is generally about 10%. Energy is passed up a food chain or web from lower to higher trophic levels, and it is depicted by an energy pyramid. The other 90% of the energy is used for metabolic processes or given off to the environment as heat. This significant loss of energy at each step explains why typically there are no more than four trophic levels in a food chain or web, because there isn't enough energy left to support more levels.Hence option A is correct.
Aluminum metal reacts with dilute sulfuric acid to produce aluminum sulfate and hydrogen gas. what mass of aluminum will react with 5.890 g of sulfuric acid
Answer:
Aluminium reacts with dilute sulfuric acid based on the following reaction:
2Al + 3H2SO4 ..............> Al2 (SO4)3 + 3H2
From the periodic table:
mass of aluminium = 27 grams
mass of hydrogen = 1 gram
mass of oxygen = 16 grams
mass of sulfur = 32 grams
Therefore:
molar mass of aluminium = 27 grams
molar mass of sulfuric acid = 2(1) + 32 + 4(16) = 98 grams
From the balanced chemical equation:
2 moles of aluminium react with 3 moles of dilute sulfuric acid.
This means that 34 grams of Al react with 294 grams of the acid
To get the amount of aluminium that reacts with 5.890 g of sulfuric acid, we will do cross multiplication as follows:
amount of Al = (5.890 x 34) / 294 = 0.6811 grams
Explanation:
When a student adds benedict’s solution to a clear solution, the solution turns orange. the student can conclude that the solution has a high concentration of which biomolecule?
Answer:
Answer:
(an open) (30) (greater than 30) ( 40
Explanation:
i am smart
Complete this equation for the dissociation of na2co3(aq). omit water from the equation because it is understood to be present.
In water Sodium carbonate dissociates to form Sodium hydroxide and carbon dioxide.
The dissociation reaction for Sodium carbonate is
[tex]\rm \bold{ Na_2CO3 \rightarrow 2 Na^(^+^) + CO_3^(^2^-^)}[/tex]
In water the sodium ion will react with [tex]\rm \bold {OH^-}[/tex] ion of water to form Sodium Hydroxide.
[tex]\rm \bold{ Na_2CO3_(_a_q_)+H_2O \rightarrow 2 NaOH + CO_2}[/tex]
Hence we can conclude that in water, Sodium carbonate dissociates to form Sodium hydroxide and carbon dioxide.
To know more about water dissociation reaction, refer to the link:
https://brainly.com/question/5687191?referrer=searchResults
Brainly why is carbon so special compared to other elements?
a. carbon atoms can bond to one another and form a lot of different structures.
b. only carbon atoms can form covalent bonds with oxygen and hydrogen.
c. only carbon atoms can be dissolved in water solutions and suspensions.
d. carbon atoms have four valence electrons and can form quadruple bonds.
Your answer would be A. Hope this helps!
The speciality of carbon arises from its ability to form multiple covalent bonds and create complex structures, which are fundamental to organic compounds and therefore, to life. It's the base for a range of compounds due to its bonding capacity with varying elements.
Explanation:Carbon is special compared to other elements mainly because of its ability to form various structures through covalent bonds, thanks to its four valence electrons. This characteristic enables carbon atoms to bond together forming long chains, or other complex structures, known as carbon skeleton, which is the fundamental feature of organic compounds. However, carbon atoms do not form quadruple bonds and can bond not just with hydrogen and oxygen, but with other elements as well.
Carbon in Organic Compounds:
Organic compounds, which are the basis of life, contain carbon skeletons and hydrogen. Carbon's ability to form covalent bonds with hydrogen, oxygen, and other elements is essential to the diverse structures and functions of these compounds. Also, while carbon can indeed be dissolved in water solutions, so can many other elements.
Learn more about Carbon here:https://brainly.com/question/3049557
#SPJ5
Is glucose a solution colloid or suspension?
James took two pea plants, placing one in a dark closet and the other on a sunny window sill. Both are located in air conditioned rooms. He then measured the growth of the pea plants after a week. In this experiment, the dark closet is a(N)
a.independent variable
b.control
c.dependent variable
d.constant
Answer : Option A) independent variable.
Explanation : The dark closet (N) was a part of independent variable as it's variable does not depends on any other variable.
Also, growth factor which was the major aim of study was the dependent variable as it was dependent on closet where it was placed.
Constant was the water as the quantity of water was same for both the plants.
Control was the plant that was used for this experiment, as this was the standard that was used for the comparison of the growth.
Classify each as the following:element, compound, or mixture:
1. helium
2. water
3.sodium
4. a sedimentary rock
5.salt
6.air
Helium and Sodium are elements, Water and Salt are compounds, while Sedimentary Rock and Air are mixtures.
Explanation:To correctly classify each substance, we need to understand what elements, compounds, and mixtures are. An element is a pure substance consisting of only one type of atom. A compound is a substance made up of two or more different elements that are chemically bonded. A mixture is composed of two or more different substances that retain their own properties and can be separated physically.
Helium - Element: Helium is a type of atom and thus is an element. Water - Compound: Water is composed of two hydrogen atoms and one oxygen atom chemically bonded, making it a compound. Sodium - Element: Sodium is a type of atom, making it an element. Sedimentary Rock - Mixture: Sedimentary rock is formed from a blend of minerals and organic material, qualifying it as a mixture. Salt - Compound: Salt (NaCl) is composed of sodium and chloride ions chemically combined, hence it's a compound. Air - Mixture: Air is a mixture of various gases like nitrogen, oxygen, carbon dioxide.Learn more about Classifying Substances here:
https://brainly.com/question/33928166
#SPJ2
What are the main ideas in dalton's atomic theory? check all that apply. check all that apply. atoms of one element can change into atoms of another element. atoms of one element cannot change into atoms of another element. all atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements. each element is composed of tiny, indestructible particles called atoms. nuclear particles combine in simple, whole number ratios to form atoms. each atom is composed of elements. atoms combine in simple, whole number ratios to form compounds?
The main ideas in Dalton's atomic theory are: all atoms of a given element have the same mass and other properties, each element is composed of tiny, indestructible particles called atoms, and atoms combine in simple, whole-number ratios to form compounds.
Explanation:The main ideas in Dalton's atomic theory are:
All atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements. This means that all atoms of the same element have the same atomic mass and behave similarly.Each element is composed of tiny, indestructible particles called atoms. Atoms are the fundamental building blocks of matter and cannot be created or destroyed during a chemical reaction.Atoms combine in simple, whole-number ratios to form compounds. This means that atoms join together in fixed ratios to create compounds, which have different properties from the elements they are made of.Learn more about Dalton's atomic theory here:
https://brainly.com/question/11682922
#SPJ6
What percentage of a radioactive species would be found as daughter material after six half–lives?
Write a balanced chemical equation describing the reaction of zinc and hydrochloric acid.
Explanation:
When zinc chemically reacts with hydrochloric acid in chemical reaction then it leads to the formation of zinc chloride along with evolution of hydrogen gas.
Chemical equation which represents this chemical reaction is as follows.
[tex]Zn + HCl \rightarrow ZnCl_{2} + H_{2}[/tex]
Number of atoms on reactant side are as follows.
Zn = 1
H = 1
Cl = 1
Number of atoms on product side are as follows.
Zn = 1
H = 2
Cl = 2
Hence, to balance this equation we will multiply HCl by 2 on reactant side. Therefore, the balanced chemical equation is as follows.
[tex]Zn + 2HCl \rightarrow ZnCl_{2} + H_{2}[/tex]
Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?
One mole of any substance is equal to Avogadro’s number, 6.023 x 10²³
A mole of magnesium = a mole of iron = Avogadro’s number, 6.023 x 10 ²³
One mole of any element contains 6.023 x 10²³ number of atoms.
One mole of any substance contains 6.023 x 10²³ number of atoms, molecules, ions, or formula units.
"what would be the molecular formula for a polymer made from eight glucose (c6h12o6) molecules linked together by dehydration reactions?"
What is the relationship between an element's atomic mass and an element's isotopes?
The relationship between an element's atomic mass and an element's isotopes is that they have the same number of protons in their respective nuclei.
Isotopes are those atomic species of the same element that differs in the number of nucleons in their nucleus.Isotopes differ in mass numbersProtons and neutrons are collectively called nucleons.They have the same number of protons as that of the parent atom in their respective nuclei.They have a different number of neutrons in their nucleus.So, from this, we can conclude that the relationship between an element's atomic mass and an element's isotopes is that they have the same number of protons in their respective nuclei.
Learn more about isotopes here:
brainly.com/question/13214440?referrer=searchResults
brainly.com/question/24604793?referrer=searchResults
If a particular compound is composed of elements A and B, the ratio of the mass of B to the mass of A will always be the same. This is a statement of the law of ____________________________.
which of the following is a chemical property ?
A. Ability to conduct heat
B. Ability to become magnetic
C. Ability to react with acid
D. Ability to conduct electricity
The ability to react with acid is a type of chemical property, therefore the correct answer is option C.
What is a chemical reaction?A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products.
There are differences between the chemical and physical properties of any material.
The ability to react with acid is a type of chemical property,
While on the other hand ability to conduct heat, the ability to become magnetic, and the ability to conduct electricity are the physical properties of any material.
Thus, the ability to react with acid is a type of chemical property the correct answer is option C.
To learn more about chemical reactions, refer to the link;
brainly.com/question/22817140
#SPJ2