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madam [21]
3 years ago
8

Why does the mass number only include the number of protons and the neutrons (not electrons)?

Chemistry
1 answer:
docker41 [41]3 years ago
4 0

Answer:

The mass number (A) of an atom is the total number of protons and neutrons in its nucleus. ... Because electrons have virtually no mass, just about all the mass of an atom is in its protons and neutrons. Therefore, the total number of protons and neutrons in an atom determines its mass in atomic mass units (Table 4.5. 1).

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Water and oxygen gas are the products of a chemical reaction.
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The answer is C.

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3 years ago
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Gaseous ethane CH3CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 0.6
yulyashka [42]

Answer:

1.8 g

Explanation:

Step 1: Write the balanced equation

CH₃CH₃(g) + 3.5 O₂(g) ⇒ 2 CO₂(g) + 3 H₂O(g)

Step 2: Determine the limiting reactant

The theoretical mass ratio of CH₃CH₃ to O₂ is 30.06:112.0 = 0.2684:1.

The experimental mass ratio of CH₃CH₃ to O₂ is 0.60:3.52 = 0.17:1.

Thus, the limiting reactant is CH₃CH₃

Step 3: Calculate the mass of CO₂ produced

The theoretical mass ratio of CH₃CH₃ to O₂ is 30.06:88.02.

0.60 g CH₃CH₃ × 88.02 g CO₂/30.06 g CH₃CH₃ = 1.8 g

4 0
3 years ago
Calculate the number of moles found in 88.02g of CO2
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Answer:

2.00moles

Explanation:

mol=mass/mr

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6 0
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Answer:

Density is defined as how tightly or loosely packed a substance is, or to the number of things or people in a certain area.

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If you repeat an experiment and the result are very different from the result you got the first time the next step would be to w
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