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4 years ago

10

Why is a kite flying in the sky an example of potential energy?

1 answer:

Alenkinab [10]4 years ago

6 0

The answer is b because the wind exerts a force on the kite

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How many grams of calcium bromide are in 50.0 mL of a 0.25 M calcium bromide solution?

lianna [129]

$C_{m}=\frac{n}{V_{r}}\\\\
m=\frac{m}{M}\\\\
C_{m}=\frac{m}{MV_{r}} \ \ \ \ \Rightarrow \ \ \ \ m=C_{m}MV_{r}}\\\\
C_{m}=0.25\frac{mol}{L}\\
M_{CaBr_{2}}=200\frac{g}{mol}\\
V_{r}=50mL=0.05L\\\\
m=0.25\frac{mol}{L}*200\frac{g}{mol}*0.05L= \emph{\textbf{2.5g}}$

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3 years ago

Câu 4. Khối lượng H2SO4 trong 150 gam dung dịch H2SO4 14% là

Hitman42 [59]

Answer:

21 gam

Explanation:

mH2SO4 = mddH2SO4.C% = 150. 14% = 21g

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3 years ago

Lao tzu believed that _____.

BaLLatris [955]

The answer is b. propel should be guided by the way of nature

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4 years ago

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bonds within the nucleus of reactants atoms are broken and rearranged to form new product atoms

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