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scoray [572]
3 years ago
9

Which of the following is the term for the heaviness on something's surface that exerts a force over an area? a. force b. pressu

re c. sediment d. depositionn
Chemistry
2 answers:
vodka [1.7K]3 years ago
7 0
I think it’s a but i’m not sure
Elan Coil [88]3 years ago
3 0

Answer:

i think the answer is pressure

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Which of the following is a pure substance? <br> brass<br> sodium<br> rocks<br> steel
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A chemist determined by measurements that 0.030 moles of barium participated in a chemical reaction. Calculate the mass of bariu
schepotkina [342]

Answer: 4.1 g of barium precipitated.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}

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0.030=\frac{x}{137}

x= 4.1 g

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3 0
3 years ago
A student is trying to identify a clear liquid that he finds in a beaker in the classroom. He thinks the liquid might be either
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Simply mulitply the volume by the density. As we shall see, this is dimensionally consistent.

Explanation:

density

ρ

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g

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are reasonable.

For this problem:

17.4

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