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3 years ago

Atomic mass represents the number of: rotons neutrons electrons protons and neutrons

Chemistry

1 answer:

Pavlova-9 [17]3 years ago

8 0

Answer:

Proton Atomic Mass = 1

Neutron = 1

Electron = 0.0005

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How many moles in 6.57 x 10^24 formula units of NaCl?

laiz [17]

Answer:

3.955*10^48

Explanation:

1 mole of a substance gives 6.02*10^23/6.57*10^24 will give x then cross multiply the answer. is 3.955*10^48

8 0

3 years ago

Part B When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 22.8 g of carbon were burned in the pres

aksik [14]

<u>Answer:</u> The amount of carbon dioxide gas produced in the reaction is 83.6 grams

<u>Explanation:</u>

As, some amount of oxygen gas is left after the reaction is completed. So, it is present in excess and is considered as an excess reagent.

Thus, carbon is considered as a limiting reagent because it limits the formation of product.

To calculate the number of moles, we use the equation:

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

Given mass of carbon = 22.8 g

Molar mass of carbon = 12 g/mol

Putting values in equation 1, we get:

$\text{Moles of carbon}=\frac{22.8g}{12g/mol}=1.9mol$

The chemical equation for the reaction of carbon and oxygen gas follows:

$C+O_2\rightarrow CO_2$

By Stoichiometry of the reaction:

1 mole of carbon produces 1 mole of carbon dioxide gas

So, 1.9 moles of carbon will produce = $\frac{1}{1}\times 1.9=1.9moles$ of carbon dioxide gas

Now, calculating the mass of carbon dioxide from equation 1, we get:

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = 1.9 moles

Putting values in equation 1, we get:

$1.9mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=(1.9mol\times 44g/mol)=83.6g$

Hence, the amount of carbon dioxide gas produced in the reaction is 83.6 grams

6 0

3 years ago

What is bedrock layer

Nuetrik [128]

Bed rock is a layer underneath minerals

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3 years ago

Why is water clarity an important measure of water quality?

Neko [114]

Water clarity is important in water habitats. The amount of sunlight that reaches underwater plants depends on water clarity. The plants will die if they cannot get enough sunlight, and we need the water to be clean and clear so the sunlight reaches the plants. Hope that helps :)

8 0

4 years ago

Identify the reactants and products and write chemical equations for each of the following reactions: a. Gaseous chlorine reacts

Aneli [31]

Answer:

a. Cl (g) + KBr (aq) = Br (l) + KCl (aq)

b. Al (s) + I (s) = AlI (s)

c. Mg (s) + HCl (aq) = MgCl (aq) + H2 (g)

Explanation:

The reactants are the elements before the equals sign and the products are the ones after the equals sign that are bolded.

Hope this helps :)

6 0

3 years ago