CHEMISTRY HIGH SCHOOL

A sample of sulfur has a mass of 232 grams. How many moles of sulfur are in the sample?

Answers

Answer 1
Answer:

Answer : The number of moles of sulfur present in sample are, 7.343 moles

Solution : Given,

Mass of sulfur = 232 gram

Molar mass of sulfur = 32 g/mole

Formula used :

\text{Moles}=\frac{\text{Given mass}}{\text{Molar mass}}

\text{Moles of Sulfur}=\frac{\text{Mass of Sulfur}}{\text{Molar mass of Sulfur}}=(232g)/(32g/mole)=7.343moles

Therefore, the number of moles of sulfur present in sample are, 7.343 moles
Answer 2
Answer: Sulfur has a molar mass of 32.1 g/mole. So 232 g S / 32.1 g S = 7.22 moles 

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Each glucose molecule consists only of carbon, hydrogen, and oxygen atoms. If each molecule contains 53.3% oxygen and 6.7% hydrogen by mass, what percentage of each glucose molecule is made up of carbon?

Answers

53.3% + 6.7% = 60%, 100% - 60% = 40%. 40% of glucose is made of carbon. Since there are only three types of atoms in glucose, and the amount of hydrogen and oxygen is already given, this means that whatever percentage is left (40%) has to be carbon.

A salt is best described as a compound that is formed from the reaction betweenan acid and a base.
a strong acid and a weak acid.
a strong base and a weak base.
an acid and water.

Answers

The right answer is A (strong acid with strong base).

The reaction of an acid with a base to produce salt and water alone is called a neutralization reaction.

A salt is a compound formed following a replacement of the hydrogen ions (H +) of an acid with a basic radical during a reaction.

 

A normal salt is formed by the complete replacement of the H + of an acid (example Na2CO3).

while an acidic salt is formed by the incomplete replacement of the H + of an acid (eg NaHCO3).

How does the nucleus of a copper atom compared to the nucleus of a nickel atom

Answers

Copper has 29 protons in the nucleus, while Nickel has 28 protons.

I really need help with these three questions PLUS 32 PONITSNaOH + HCl → NaCl + H2O
1.State, in words, what is happening in the equation. (Example for a different equation: In the equation C + O2→ CO2 carbon and oxygen combine to make carbon dioxide.)
2.Is this equation balanced? Explain why or why not.
3.State which compounds are the reactants and which are the products. Use both the common name and the chemical formula. (Example for a different equation: C + O2 → CO2, carbon–C and Oxygen–O are the reactants and CO2 is the product. )

Answers

1, neutralization of hydrochloric acid with sodium hydroxide 
,2. balanced 

3. reactants are sodium hydroxide also called lye and hydrochloric acid which as a gas is hydrogen chloride, also stomach acid 
products are water and sodium chloride, also called table salt

How many moles of atoms are in 5.00 g of 13C

Answers

0.384 moles of atoms are in 5.00 g of ¹³C of isotope.

How we calculate moles?

Moles of any substance will be calculate by dividing the given mass of the substance to the molar mass of that substance.

In the question given that:

Given mass of carbon = 5grams (because isotope of carbon is present ¹³C)

Molar mass of carbon = 13g/mol (because isotope of carbon is present ¹³C)

Moles of carbon = 5grams / 13g/mol

Moles = 0.384 moles

Hence, 0.384 moles is the required moles.

To know more about moles, visit the below link:

brainly.com/question/300875
  Mr = 13 g / mol 
mass = 5 g 
Mol = 5/13 mol :)

Most modern forms of transportation are powered by fossil fuels. Carbon dioxide, methane, carbon monoxide, and other gases are released into the atmosphere during the production and combustion of these fuels. How might these gases cause climatic changes? These gases have no effect on atmospheric temperatures, so they are unable to cause any type of climatic changes. These gases cause more water vapor to condense, making climates wetter than they were in the past. These gases reduce the amount of thermal energy escaping into space, effectively warming the atmosphere.

Answers

hydronic acid and oxgeyn
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