CHEMISTRY HIGH SCHOOL

Every substance melts at 0 degrees Celsius and boils at 100 degrees Celsius.True
False

Answers

Answer 1
Answer: False, that only applies to water as far as I know, but I know for a fact that gold does not melt at 0 degrees Celsius
Answer 2
Answer: Hello! It is true that water boils at 100% C, however, this is not true for any substance. Take steel, for instance, steel would take MUCH higher temperatures to melt, and to boil. As it says "ANY SUBSTANCE" this would be false.

I hope this helped!

I am, yours most sincerely,
SuperHelperThingy

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Which statement best describes why carbon can form a wide variety of organic compounds?Each carbon atom ionically bonds with atoms of carbon, hydrogen, oxygen, and nitrogen.

Each carbon atom covalently bonds with atoms of carbon, hydrogen, oxygen, and nitrogen.

Each carbon atom ionically bonds with atoms of oxygen and nitrogen.

Each carbon atom covalently bonds with atoms of oxygen and nitrogen.

Answers

Carbon can form a wide variety of organic compounds because:

Each carbon atom covalently bonds with toms of carbon, hydrogen oxygen, and nitrogen

A carbon atom can have 4 single valence electrons around it. This allows it to form covalent bonds with many different atoms.

Each carbon atom covalently bonds with atoms of carbon, hydrogen, oxygen, and nitrogen describes why carbon can form a wide variety of organic compounds. thus, option B is correct.

What is valency?

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

Carbon can form a wide variety of organic compounds because Each carbon atom covalently bonds with atoms of carbon, hydrogen oxygen, and nitrogen. a carbon atom can have 4 single valence electrons around it. This allows it to form covalent bonds with many different atoms.

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What is the difference in the beginning between primary succession and secondary succession?a. secondary succession has water
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c. primary succession has soil
d. primary succession has water

Answers

Option B. secondary succession has soil

describe the" fear appeal" and how it's used in public messaging. Give an example or create your own public health message using the fear appeal.

Answers

A good example is cigarretes they try to scare you into not smoking by telling you all of the downsides of smoking like lung cancer and i guess that would be fear appeal 

Which is the name of C5H12?n-heptane
n-butane
All of these
n-pentane
n-hexane

Answers

pentane is the correct answer the prefix pent means 5 so 5 hydrogens

In which sample of water do the molecules have the highest average kinetic energy?(1) 20. mL at 100.°C (3) 60. mL at 60.°C
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Answers

The answer is (1). The question is asking the average kinetic energy. So it does not related with volume. When temperature increases, the kinetic energy will also increase. So the answer should be the highest temperature.

The following balanced equation shows the formation of sulfur dioxide. S + O2 mc023-1.jpg SO2 How many moles of sulfur are needed to produce 15.0 mol of sulfur dioxide?

Answers

For the given chemical reaction, 15 moles of sulfur are required to produce 15 moles of sulfur dioxide.

What is the balanced chemical equation?

A chemical equation can be defined as a representation of a chemical reaction in the form of symbols of the substances. A chemical equation consists of contributing reactants in the reaction, formed products, and their physical states.

The chemical equation in which the number of atoms of each element is equal on both sides of the equation is called a balanced chemical equation.

The law of conservation of mass follows by a balancing of a chemical equation therefore, the total mass of the elements on the reactant side must be equal to the total mass of elements on the product side.

Given, the chemical equation is:  S + O₂ → SO₂

From the above equation, we can say that one mole of sulfur produces one mole of sulfur dioxide.

Given the moles of the sulfur dioxide = 15 moles

The moles of sulfur required to make 15 moles of sulfur = 15 moles

Therefore, 15 moles of sulfur are required for the given conditions.

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S + O₂ = SO₂

1 mole S ------------ 1 mole SO₂
? mole S ----------- 15.0 mole SO₂

S = 15.0 * 1 / 1

= 15 moles of S

hope this helps!
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