Calculate the number of moles 3.15 g of HNO3 19.3 g of NaCl 21.25 g of NaNO3

Answers

Answer 1

Answer: The number of moles:
3.15g of $HNO_(3)$
1 mole of $HNO_(3)$ - 63g.
x moles of $HNO_(3)$ - 3.15g
$x=(1\ mole*3.15g)/(63g)=(3.15)/(63)=0.05\ mole$

The number of moles:
19.3 g of NaCl
1 mole of NaCl- 58.44g.
x moles of NaCl- 19.3g.
$x=(1\ mole*19.3g)/(58.44g)=(19.3)/(58.44)=0.33\ mole$

The number of moles:
21.25 g of $NaNO_(3)$
1 mole of $NaNO_(3)$ - 85g.
x moles of $NaNO_(3)$ - 21.25g.
$x=(1\ mole*21.25g)/(85g)=(21.25)/(85)=0.25\ mole$

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Which material is a pure substance?A) alloy

B) compound

C) mixture

D) solution

Answers

The answer is B. The material that can be considered as a pure substance is the compound. A pure substance is defined as a material that is only composed of one substance. The other choices given are mixtures where there are two or more different substances in a material.

B) compound is a pure substance

Further explanation

A pure substance can be an element or compound.

The element is a single substance that cannot be broken down anymore or the simplest substance.

While the compound is a pure substance that is formed from a combination of two or more elements through chemical reactions and has a constant chemical ratio.

A mixture is a combination of two or more single substances. The properties of the mixture component are not lost / unchanged as in compounds.

The mixture can be divided into a homogeneous mixture if the composition / ratio of each substance in the mixture is the same and heterogeneous mixture if the ratio of the composition of the substances is not the same (can be varied) in each place.

Mixtures can also be divided into solutions, suspensions and colloids based mainly on the size of the particles

A) alloy

alloy is a mixture of elements that have metal properties

B) compound

Compounds are represented in chemical formulas which can be separated into their constituent elements by chemical processes

C) mixture

can be separated by physical or mechanical means, the composition can be changed depending on the proportion of pure substances that form it

D) solution

Solution is: a mixture of two or more substances consisting of a solute and a solvent. The particle size of the solution is very small, less than 1 nm.

Learn more

A heterogeneous mixture

brainly.com/question/5428813

a homogeneous mixture

brainly.com/question/1799869

an example of a physical change

brainly.com/question/1119909

Which refers to a mixture that contains more than one phase in which the characteristics of the particles vary throughout the mixture?

Answers

This type of mixture is a heterogeneous mixture. It is any mixture that is not uniform. Heterogeneous mixtures always have more than one phase.It is made up of substances which stays physically separate with each other. Best example is a mixture of sand and sugar. If you get two samples from different points of the mixture and analyze it, you will see that the concentrations of the components are different and that the two solid phases never combine with each other.

Answer:

C. Heterogeneous

Explanation:

How does marijuana effect the brain

Answers

If you’ve ever smoked a joint or eaten a pot-laced brownie, you’re hardly alone: More than 1 in 3 people in America have tried marijuanaat one point in their lives.

Though occasional use isn’t usually harmful, pot can affect your body and mind any time it gets into your system. Here’s what you need to know.

Physical Effects

Marijuana comes from the hemp plant Cannabis sativa. It has an active ingredient called THC that makes you feel high. THC and other compounds in marijuana can also affect the way your body works.

Which of the following elements would be considered a nonmetal?fluorine (#9)
silicon (#14)
cobalt (#27)
sodium (#11)

Answers

The element among the list that is not a metal there is the element fluorine.

What is a nonmetal?

A nonmetal is an element that occur towards the right hand side of the periodic table and does not have the general properties that are attributed to metals such as the ability to react with acids.

The element among the list that is not a metal there is the element fluorine.

Learn more about metals: brainly.com/question/2273750

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fluorine (#9) is a nonmetal

What is the element Ar classified as in the periodic table?

Answers

Ar is classified as Argon in the periodic table it is a Noble gas having atomic number 18

Me not looking at periodic table i believe its Argon.

What is the hardest form of carbon

Answers

The hardest form of carbon is diamond.

i believe the answer is diamond. hope this helps!

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