How many moles in 30.0 grams of h3po4

Answers

Answer 1

Answer: Molar mass H₃PO₄ = 98.0 g/mol

1 mole ----- 98.0 g
? mole ------ 30.0 g

moles = 30.0 * 1 / 98.0

= 0.306 moles

hope this helps!

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. Find the mass of 0.159 mol silicon dioxide.

Answers

One mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The mass of 0.159 mole silicon dioxide. is 9.55g.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample.

Mathematically,

mole =given mass ÷ Molar mass

First of all we find the molar mass of silicon oxide

Molar mass of silicon oxide= atomic mass of silicon+2×molar mass of oxygen

Molar mass of silicon oxide=28.0855+2×16

Molar mass of silicon oxide=60.08 g/mol

Substituting the values in fisrt equation we get

0.159 mol=given mass÷60.08 g/mol

0.159 mole x 60.08 g/mol=mass

9.55g=mass of silicon oxide

Therefore the mass of 0.159 mol silicon dioxide. is 9.55g.

To know more about mole, here:

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Answer:

9.55 grams of SiO2

Explanation:

If the mass you mean by grams:

0.159 mole x 60.08 g (Periodic table by adding both elements)

Cancel moles with moles (Original moles with the 1 mol at the bottom of the grams) and gives you:

9.55 grams of SiO2

Describe how chemistry is a part of your morning routine?

Answers

Explanation:

There are many examples of chemistry in daily life showing how important chemistry is. For example digestion is based on chemical reaction. In our morning routine we brush our teeth by paste that is a chemical, the soap or shampoo we use is also a chemical. The process of making food is also chemistry that involve chemical reaction.

brushing your teeth uses a chemical to dissolve bacteria, the milk you drink or eat with your cereal is treated with a series of chemical reactions in order for it to sit in tour frindge

How many moles of NO3 are there in 6.2g?

Answers

Answer : The number of moles of $NO_3$ is, 0.1 moles

Solution : Given,

Mass of $NO_3$ = 6.2 g

Molar mass of $NO_3$ = 62 g/mole

Now we have to calculate the moles of $NO_3$ .

$\text{Moles of }NO_3=\frac{\text{Mass of }NO_3}{\text{Molar mass of }NO_3}=(6.2g)/(62g/mole)=0.1moles$

Therefore, the number of moles of $NO_3$ present in 6.2 g is, 0.1 moles

6.2 divided by the mass number of NO3 is 0.1 moles. Anytime your trying to find the moles of something you divide it by the mass number of your combined elements.

A solution is prepared by dissolving 91.7 g fructose in 545 g of water. Determine the mole fraction of fructose if the final volume of the solution is 576 mL.

Answers

Answer:

Mole fraction = 0,0166

Explanation:

Mole fraction is defined as mole of a compound per total moles of the mixture. In the solution, the solute is fructose and the solvent is water. That means you need to find moles of fructose and moles of water.

The molecular mass of fructose is 180,16g/mol and mass of water is 18,02 g/mol. Using these values:

91,7g fructose × (1mol / 180,16g) = 0,509 moles of fructose

545g water × (1mol / 18,02g) = 30,24 moles of water

Thus, mole fraction of fructose is:

$(0,509 moles)/(0,509mol + 30,24mol) = 0,0166$

Mole fraction = 0,0166

I hope it helps!

The pH scale for acids and bases ranges from

Answers

0-14
0-6 is an acid
8-14 is a base
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Which is a function of cyclins? Cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle. Cyclins are glycoproteins that repair DNA in the beginning of cell cycle. Cyclins are proteins that regulate when and how often a cell divides.

Answers

The correct answer for the question that is being presented above is this one: "Cyclins are proteins that regulate when and how often a cell divides." The function of the cyclins is that it helps regulates during cell division. They are proteins, basically.

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An experiment produced 0.10 g CO2, with a volume of 0.056 L at STP. If the accepted density of CO2 at STP is 1.96 g/L, what is the approximate percent error?