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3 years ago

Why are atoms small? and you cannot see them?

2 answers:

5 0

Atoms are the smallest building block that can affect things, and are many many times smaller then cells. our eyes are not designed to see such small things

Cerrena [4.2K]3 years ago

3 0

The reason they are small because they are made out of smaller partials. Also it's normal for us to not see them because of how small they are.

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A chemist reacted 17.25 grams of sodium metal with an excess amount of chlorine gas. The chemical reaction that occurred is show

Afina-wow [57]

Answer: The actual yield of the product is 38.57 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

We are given:

Given mass of Na = 17.25 g

Molar mass of Na = 23 g/mol

Putting values in equation 1, we get:

$\text{Moles of Na}=\frac{17.25g}{23g/mol}=0.75mol$

For the given chemical reaction:

$2Na+Cl_2\rightarrow 2NaCl$

By stoichiometry of the reaction:

2 moles of Na produces 2 moles of NaCl

So, 0.75 moles of Na will produce = $\frac{2}{2}\times 0.75=0.75mol$ of NaCl

We know, molar mass of $NaCl$ = 58.44 g/mol

Putting values in above equation, we get:

$\text{Mass of NaCl}=(0.75mol\times 58.44g/mol)=43.83g$

The percent yield of a reaction is calculated by using an equation:

$\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100$ ......(1)

Given values:

Percent yield of the product = 88 %

Theoretical value of the product = 43.83 g

Plugging values in equation 1:

$88\% =\frac{\text{Actual yield}}{43.83g}\times 100\\\\\text{Actual yield}=\frac{88\times 43.83}{100}=38.57g$

Hence, the actual yield of the product is 38.57 g

3 0

3 years ago

How are cholesterol and bile related? Thank you!

Alchen [17]

One of the major functions of cholesterol is in making bile acid these are synthesized in the liver from cholesterol and secreted in bile. It is used in the absorption of fat. Cholesterol is then reabsorbed in the lower intestine and recycled.

8 0

3 years ago

An aqueous solution of acetic acid, CH3 – COOH, a weak electrolyte will form _____________.

Hunter-Best [27]

Answer:

Explanation:

5 0

4 years ago

PLEASE HELP ME 20 POINTS!!!!!!!!!!

zhuklara [117]

2.66 molecules of ammonia are produced

Explanation:

We have bellow the chemical reaction between nitrogen (N₂) and hydrogen (H₂) which produce ammonia (NH₃):

N₂ + 3 H₂ → 2 NH₃

From the chemical reaction we see that 1 molecule of nitrogen reacts with 3 molecules of hydrogen, so 4 molecules of nitrogen will react with 12 molecules of hydrogen but we only have 4 molecules of hydrogen available, so the limiting reactant will the hydrogen. Knowing this we devise the following reasoning:

if 3 molecules of hydrogen produces 2 molecules of ammonia

then 4 molecules of hydrogen produces X molecules of ammonia

X = (4 × 2) / 3 = 2.66 molecules of ammonia

However it does not make sense to produce half a molecule of something (you can not do this in the real world), the problem will make sense if you talk about the number of moles of each substance, because in 1 mole of substance you have 6.022 × 10²³ molecules.

You may find in the attached picture the drawing of the molecules.

Learn more about:

limiting reactant

brainly.com/question/13979150

#learnwithBrainly

3 0

3 years ago

How are molecules built?

RoseWind [281]

Bonding I'm guessing

6 0

3 years ago