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MrRissso [65]
4 years ago
15

What is the mass, in grams, of a sample of 6.12 × 10^24 atoms of manganese (Mn)? Show your work or explain the steps that you us

ed to determine your answer.
Chemistry
1 answer:
e-lub [12.9K]4 years ago
6 0
<span>6.12<span>(<span>1024</span>)</span></span><span>=<span><span>(6.12)</span><span>(<span><span>1e</span>+24</span>)</span></span></span><span>=<span><span>6.12e</span>+24</span></span> <span> = </span>
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When 28242 J are transferred to water sample, its temperature increases 18⁰C to 63⁰C. Determine the mass of the water sample.
ivanzaharov [21]

Answer:

149.79

Explanation:

Formula

Joules = m * c * delta (t)

Givens

J = 28242

m = ?

c = 4.19

Δt = 63 - 18 = 45

Solution

28242 = m * 4.19 * 45

28242 = m * 188.55

m = 28242 / 188.55

m = 149.79

8 0
3 years ago
Is it a physical or a chemical change?
tatiyna

Answer:

Number 4 should be physical change since scientists are breaking the water into 2 elements, O₂ and H₂

5 0
3 years ago
You are designing an office building. In order to reduce noise from high-frequency sounds between offices above and below each o
Monica [59]

Answer:

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Explanation:

8 0
3 years ago
Read 2 more answers
What is the pH of 5.34 x 10^-6 M NaOH?
Igoryamba

Answer:

The pH is 8.73

Explanation:

In water,

p^{H} + p^{0H} = 14

p^{H} = 14 - p^{0H}

p^{0H} = -log_{10}(H0^{-})

Thus,

p^{p0H} = -log_{10}(5.34×10^{-6})

p^{0H} = -(-5.27)

p^{0H} = 5.27)

Hence, we substitute;

p^{H} = 14 - p^{0H}

pH = 14 - 5.27

pH = 8.73

5 0
3 years ago
Round 1.0498 to 3 sig figs
hoa [83]

Answer:

1.05

Explanation:

because the 9 rounds the 4 to a 5

4 0
3 years ago
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