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yan [13]
3 years ago
8

What is the mass of a 5.0mL sample with a density of 2.5 g/ml?

Chemistry
1 answer:
Nady [450]3 years ago
6 0

Answer:

<h3>The answer is 12.5 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2.5 × 5

We have the final answer as

<h3>12.5 g</h3>

Hope this helps you

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The radioactive decay of a certain sample produced 846 disintegrations per minute. exactly 3.00 days later, the rate of decay wa
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\boxed{\text{1.81 da}}

Explanation:

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\ln \dfrac{846}{269} = k \times 3.00\\\\\ln3.145 = 3.00k\\1.146 = 3.00k\\\\k =\dfrac{1.146}{3}\\\\k = \text{0.382 /da}\\

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The half-life for decay is \boxed{\textbf{1.81 da}}.

3 0
3 years ago
Find the number of moles of water that can be formed if you have 138 mol of hydrogen gas and 64 mol of oxygen gas.
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2H₂₍g₎ + O₂ ₍g₎→ 2H₂O

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128 mol H₂O
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