Sulfur oxides Carbon monoxides Chlorofluorocarbons (CFCs)Nitrates are responsible for the hole in the ozone layer.

Answers

Answer 1

Answer: The best answer for the question above would be the chloroflourocarbons or the CFCs. These chloroflourocarbons or CFCs are the ones responsible for the depletion of the ozone - which leads to leaving a hole in its layer. These gases eat out the ozone layer and allows harmful UV rays of the sun to come in the Earth.

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A rabbit is observed to have brown fur. This observed trait is referred to as the
Which of the following equations has correct formulas and also is a balanced equation?a. CaCO3 - > CaO + CO3 b. 3KCl + HNO3 - > 3HCl + KNO3 c. 2Be + O2 - > 2BeO d. Mg + O2 - > MgO2
Which of the following statements is true of the critical temperature of a pure substance?A. The critical temperature is the temperature above which the liquid phase of a pure substance can exist. B. The critical temperature is the temperature above which the liquid phase of a pure substance cannot exist. C. The critical temperature is the temperature below which the liquid phase of a pure substance cannot exist. D. The critical temperature is the temperature at which all three phases can coexist. E. The critical temperature is the temperature at which the pure substance reaches, but cannot go beyond, the critical pressure. Can someone explain this one?
What do you call the amount of water vapor in the air?
The closeness of a measurement to the actual value of what is being measured

How far is the earth from the sun?A. 1 parsec
B. 1 kiloparsec
C. 1 light-year
D. 1 AU

Answers

The distance between the Earth and the Sun is approximately 1 AU (Astronomical Unit). Therefore, option D is correct.

What is astronomical unit ?

One AU is defined as the average distance between the Earth and the Sun, which is about 93 million miles (150 million kilometers). It is a convenient unit of measurement for distances within our solar system.

A parsec is a unit of distance used for objects outside our solar system, equal to approximately 3.26 light-years. One kiloparsec is equal to 1,000 parsecs, or approximately 3,260 light-years. Therefore, neither A nor B is the correct answer.

A light-year is the distance that light travels in one year, which is approximately 5.88 trillion miles (9.46 trillion kilometers). Therefore, C is also not the correct, as the distance between the Earth and the Sun is much less than one light-year.

Therefore, the correct answer is D. 1 AU

Find more on astronomical unit :

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The answer should be 1 AU as it’s just about close to the number of miles from earth to sun.
Earth to sun in miles is -92.96
1 AU is- 92955807.3

which of the following substances diffuses faster in a beaker filled with water a drop of honey or drop of red ink

Answers

red ink since the substance is has a lower viscosity

red ink because it is more soluble in water than honey.

What term describes an atom's tendency to hold on on to electrons?

Answers

Explanation:

Electronegativity is the chemical property of an element. This is defined as the tendency of an atom to attract the shared pair of electrons towards itself when a bond is formed.

This property of an atom increases as we move from left to right in a period because the number of charge on the nucleus increases.
this property decreases as we move from top to bottom in a group because electrons get added up in the new shells which make it further far away from the nucleus.

The term that describes an atom's tendency or ability to hold on to electrons and pull electron density from other atoms closer to itself is referred to as electronegativity. A very electronegative atom, will not only have a strong attraction to its electrons including the valence ones, but also to the valence electrons of other atoms, usually these are nonmetals.

The atomic number and the mass number of 18 and 40. Write the information conveyed by this statement.

Answers

There are 18 protons and electrons and 22 neutrons in the atom

Compared to a 26-gram sample of NaCl(s) at STP, a 52-gram sample of NaCl(s) at STP has(1) a different density(2) a different gram-formula mass(3) the same chemical properties(4) the same volume

Answers

The answer is (3) the same chemical properties. The two samples are under same condition so they have same density. The gram-formula mass is the property of the matter itself. So it will not change. The volume will change when mass changes.

#1. Which statement is a correct expression of the Law of Conservation of Mass? A. The total mass is unpredictable in a chemical reaction. B. The total mass remains the same during a chemical reaction. C. The total mass decreases during a chemical reaction. D. The total mass increases in a chemical reaction. #2. Which element(s) are not balanced in this equation?Fe2O3 + 3 CO → Fe + 3 CO2

A.
Only the Fe is unbalanced.

B.
Only the O is unbalanced

C.
Fe and O are both unbalanced.

D.
C and O are both unbalanced

Answers

These are two questions and two answers.

Question 1: Law of Conservation of Mass

Answer: option B. The total mass remains the same during a chemical reaction.

Explanation:

The law of conservation of mass is a universal law. It states that mass is mass is neither created or destroyed, but is is conserved.

In chemical reactions, that means that, always, the total mass of the reactants equals the total mass of the products or, as the option B. states, during a chemical reaction the total mass remains the same.

Since, in chemical reactions, the atoms are not modified (the atoms just bond in different form or with different atoms), that implies that total number of each kind of atoms in the reactants equals the total number of the same kind of atoms in the products.

That is the basis for balancing the chemical equations and for the stoicheometric calculations.

Question 2 . Which element(s) are not balanced in this equation?

Answer: option A. Only the Fe is unbalanced.

Explanation:

1) Given equation: Fe₂O₃ + 3 CO → Fe + 3 CO₂

2) Count the number of atoms of each kind on each side of the equation

i) Fe

reactant side: 2

product side: 1

Therefore, Fe is not balanced

ii) O

reactant side: 3 + 3 = 6

Product side: 3 × 2 = 6

Therefore, it is balanced

iii) C

reactant side: 3

product side: 3

Therefore, C is balanced.

3) Conclusion: Only the Fe is unbalanced.

For #1, the answer is B. The total mass remains the same during a chemical reaction.

For #2, given Fe2O3 + 3CO -> Fe + 3CO2

Fe is unbalanced, and O is also unbalanced

Therefore, Option C: Fe and O are both unbalanced, is true.

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Which equations shows the complete dissociation of a strong base? HCl -> cl- + H+ HNO2 -> H+ + NO2- HA + h20 -> A- + H+ + h20 BOH + h20 -> B+ + OH- + H20

5. Which quantities must be conserved in all chemical reactions?

Which element has the greatest average atomic mass?

Determine the mass of 3.0 moles of CO2