Which of the following properties is the temperature at which a liquid turns to gas?
Answer: Boiling Point
Explanation: The temperature at which a liquid turns into the gas is known as Boiling Point.
Boiling point is defined as the temperature in which the liquid phase of any substance is converted into the vapor state.
Boiling point of the liquid varies depending upon the the environmental surroundings. Its is the rapid vaporization of the liquid. It has ability to get reduced when the external pressure increases.
The laws of electrostatics predict that protons will
A 4.236 g sample of a hydrocarbon is combusted to give 3.810 g of h2o and 13.96 g of co2. what is the empirical formula of the compound?
Atoms of the same element that have different numbers of neutrons are classified as
If a small amount of the unknown solute fails to dissolve in the lauric acid, will the molar mass that you calculate for unknown solute be too high or too low?
an atom of calcium loses two electrons. What is the charge on an ion of calcium?
a. +3
b. 0
c. -2
d. +2
The electrical charge of the calcium ion is +2.
If an atom of calcium loses two electrons, the charge that will be occupied on an ion of calcium is +2. Thus, the correct option for this question is D.
What are Electrons?Electrons may be defined as the type of sub-atomic particles that are consistently revolving around the nucleus of an atom. These sub-atomic particles are negatively charged in nature. The discovery of electrons is known to be done by J.J. Thomson.
It is the phenomenon that when an atom loses its electrons, it will definitely occupy the positive charge on its atom.
While when an atom gains electrons from another atom, it will occupy the negative charge on its atom.
In the above example, an atom of calcium loses two electrons, so it will occupy the charge of +2 on its atom.
Therefore, if an atom of calcium loses two electrons, the charge that will be occupied on an ion of calcium is +2. Thus, the correct option for this question is D.
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Bacillus megaterium is a mesophile that forms endospores. considering endospores are resistant to high heat, at what temperature will bacillus megaterium survive for experiment 17a if endospores are present?
Answer:
B
Explanation:
How do u convert 0.171 tsp into drops
Which process is responsible for the greatest loss of energy from Earth’s surface into space on a clear night?
The greatest loss of energy from Earth's surface into space on a clear night occurs through radiative heat transfer, with the lack of clouds allowing more heat to escape as infrared radiation.
The process responsible for the greatest loss of energy from Earth's surface into space on a clear night is radiative heat transfer to cold outer space. The absence of clouds on clear nights means that energy can be lost more easily as infrared radiation, cooling the Earth's surface. Clouds act like insulators due to their lower emissivity, reflecting some of the radiation back to Earth and thereby reducing heat transfer. Whereas during cloudy nights, the clouds absorb and re-emit infrared radiation, keeping the surface warmer. Furthermore, the presence of greenhouse gases also reduces heat loss, acting like a blanket that keeps the Earth warm.
Part
b.1. 6 m h2so4 is carelessly substituted for 6 m hcl. will more or fewer drops of 6 m h2so4 be required for the litmus to change color? explain.
If you measure the mass of a liquid is 11.50 g and its volume as 9.03 ml how many significant figures should its density value have
To get a result with the best degree of precision, the number of significant figures should be equal to the smallest number of significant figures of the given numbers. In this case, the smallest is 3 as given by the number 9.03 mL.
Therefore density is:
11.50 g / 9.03 mL = 1.27 g/mL
Answer:
Three(3) significant figures.
Explanation:
Okay, we are given the following values from the question; mass of the liquid = 11.50 grams(g) = four significant figures and the volume of the liquid= 9.03 millitres (mL) = three significant figures. And then we are to find how many significant figures our answer is going to be. Is it three significant figures, four significant figures or even more?. Before deciding what number of significant figures we are going to use for our answer let us find the value for the density first.
The formula for density is; mass/ volume.
==> 11.50 grams/ 9.03 ml. (Since we are not concerned about the units; the question did not specify us to use any unit, so we will let it be).
=> 1.27353266888 (grams/mL).
So, the rule for rounding off says that: (1). If you are operating on addition and subtraction, you should round off based on decimal numbers from your data that has the least and,
(2). If you are operating on multiplication and division, then you should go for your data value that has the least significant figures.
So, the second rule applies here, and from the question the value with the least significant figures is 9.03 which has three(3) significant figures.
In the periodic table, the elements are organized into groups based on
(a) calculate the molarity of a solution made by dissolving 0.0815 mol na2so4 in enough water to form exactly 550. ml of solution.
How to tell if a compound is aqueous solid or liquid, or a gas?
The compound ammonium sulfide is a strong electrolyte. write the reaction when ammonium sulfide is put into water:
Final answer:
When ammonium sulfide ((NH4)2S) dissolves in water, it dissociates fully into two ammonium ions (NH4+) and one sulfide ion (S2-), showcasing its behavior as a strong electrolyte.
Explanation:
The question relates to ammonium sulfide, a strong electrolyte, dissolving in water. When ammonium sulfide ((NH4)2S) is put into water, it dissociates into its ions because it is a strong electrolyte. Hence, the reaction is as follows:
(NH4)2S(s) + H2O(l) → 2NH4+(aq) + S2-(aq)
This reaction clearly shows ammonium ions (NH4+) and sulfide ions (S2-) being released into the solution. Two ammonium ions are needed to balance the charge on a single sulfide ion, reflecting the original stoichiometry of ammonium sulfide.
Which statement applies to electronegativity?
A.) Electronegativity increases across a period.
B.) All atoms with the same number of electron shells have equal
electronegativities.
C.) Electronegativity is the amount of energy required to remove an electron from
a gaseous atom.
D.) Electronegativity increases down a group.
Answer: The correct answer is Option A.
Explanation:
Electronegativity is defined as the tendency of an atom to attract the shared pair of electrons towards itself whenever a bond is formed.
This property increases as we move from left to right across a period because the number of charge on the nucleus gets increased and electrons are attracted more towards the nucleus.
This property decreases as we move from top to bottom in a group because the electrons get add up in the new shells which make them further away from the nucleus.
Thus, the correct answer is Option A.
What is the mass of a single fluorine molecule, f2?
Match the following bones with their locations on the body.
carpals
clavicle
cranium
femur
fibula
humerus
ilium
metacarpals
metatarsals
patella
choices are
arm
head
leg
chest
hand
foot
hip
Why do chemists sometimes refer to the process of joining sugars as condensation reactions?
Which element is placed in the same period as ruthenium but has a higher atomic number than it
Answer:
The answer is Silver.
Explanation:
The complete question is:
"Which element is placed in the same period as ruthenium but has a higher atomic number than it? bismuth osmium silver zirconium"
In the periodic table the elements are arranged so that those with similar chemical properties are located close to each other.
The horizontal rows of the periodic table are called periods. The elements that make up the same row have different properties but similar masses: all the elements of a period have the same number of orbitals. In other words, the period that an element occupies coincides with its last electronic layer. In other words, an element with five electronic layers will be in the fifth period.
The atomic number is represented by the letter Z and is the number of protons that have their atoms in the nucleus. The atomic number of silver [47] is higher than that of ruthenium [44] because silver has higher number of protons more than ruthenium. Ruthenium and silver are in the same period and they have the same number of atomic orbital but have different atomic numbers.
So the answer is Silver.
Which term best describes an animal that eats dead and decaying meat? A. predator B. producer C. decomposer D. scavenger
What is the driving force for the reaction of hcl(aq) and naoh(aq)?
The reaction between HCl and NaOH, an acid-base reaction, is driven by proton transfer from acid to base. The resulting products are water and salt, as represented by the molecular and net ionic equations. The forward drive of the reaction is due to stability from water formation and heat release.
Explanation:The driving force for the reaction of HCl(aq) and NaOH(aq) is the transfer of a proton (H+) from the acid (HCl) to the base (NaOH). This process is known as an acid-base reaction. The result is the formation of water (H2O) and a salt (NaCl), which is exothermic in nature, meaning it releases heat.
This can be represented by the molecular equation: HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l)
And the net ionic equation: H+(aq) + OH-(aq) -> H2O(l)
The reaction is driven forward due to the formation of stable water molecules and the release of heat.
The driving force for the reaction between HCl(aq) and NaOH(aq) is the formation of a precipitate, which is a solid product that forms when two solutions are mixed. In this reaction, sodium chloride (NaCl) is formed as a solid precipitate. The balanced molecular equation for the reaction is:
HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)
This equation shows that one molecule of hydrochloric acid reacts with one molecule of sodium hydroxide to form one molecule of sodium chloride and one molecule of water.
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Alcohol and water have different boiling points. Which method would you use to separate them
Answer:
Distillation.
Explanation:
Distillation is the separation technique which can be used for separation of any two liquids of different boiling points.
The boiling point of water is near 100 degree celsius while that of alcohol is less than it.
So if we separate them with distillation, then alcohol will separate out first.
If two liquids have close boiling points then we can use fractional distillation.
A laboratory instructor gives a sample of amino acid powder to each of four students, i, ii, iii, and iv, and they weigh the samples. the true value is 8.72 g. their results for three trials are student i: 8.72g, 8.74g, 8.70g student ii: 8.56g, 8.77g, 8.83g student iii: 8.50g, 8.48g, 8.51g student iv: 8.41g, 8.72g 8.55g which set of data is both most accurate and most precise?
Answer:
student 4 for jlabs
Explanation:
A(n) _______ is a substance of two or more atoms held together with chemical bonds.
In the modern quantum mechanical theory of the atom, electron movement is thought to be a
A. Particle moving around a positively charged nucleus
B. "Cloud" of negative charge in the centre
C. Negatively charged particle at a certain energy level
D. "Cloud" of negative charge occupying the space at a certain energy level.
In the modern quantum mechanical theory of the atom, electron movement is thought to be a
"Cloud" of negative charge occupying the space at a certain energy level.So, option D is correct one.
What is modern quantum mechanical theory of the atom?The modern quantum mechanical theory of the atom is also known as quantum mechanical or mechanical model.This model states that there an electron in an atom with certain states or energies.This theory uses complex shapes of orbitals called electron clouds .learn about quantum mechanics,
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A major component of gasoline is octane c8h18 . when octane is burned in air, it chemically reacts with oxygen gas o2 to produce carbon dioxide co2 and water h2o . what mass of water is produced by the reaction of 9.8g of octane
If you were to place the beaker containing the products of the reaction between copper ii chloride and aluminum on a balance, how would the mass of these products compare to the mass of the initial reactants. explain your answer.
Chemistry is the science of materials, their composition and structure and the changes they undergo, we study chemistry because
Answer:
To get a better understanding of all materials we come on contact with and how they affect and help us !
Explanation:
Which of the following is not equal 225 g?
A. 0.225 kg
B. 22,500 cg
C. 2.25 dkg
D. 2250 dg
Answer: C) 2.25 dkg
Explanation: 1 kg = 1000 g
A) [tex]0.225kg(\frac{1000g}{1kg})[/tex] = 225 g
B) cg stands for centigrams. 1 g = 100 cg
So, [tex]22500cg(\frac{1g}{100cg})[/tex] = 225 g
C) dkg stands for decagrams. dag is also used in place of dkg which also means decagram.
1 dkg = 10 g
[tex]2.25dkg(\frac{10g}{1dkg})[/tex] = 22.5 g
D) dg stands for decigram.
1 g = 10 dg
[tex]2250dg(\frac{1g}{10dg})[/tex] = 225 g
On converting all the given mass units to grams, we see that it's choice C which is not equal to 225 g and so it is the right choice.