3 years ago

What did Lisa do wrong in regards to lab safety?

Chemistry

1 answer:

kondor19780726 [428]3 years ago

5 0

Answer:she did not do it in the correct order

Explanation:

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Paper towel absorbs water is a physical or chemical change?

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before the quarry was dug, the land contained more vegetation . what impact has this change most likely had on the local ecosyst

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It was loss of nutrients, I think

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The quarry was dug up and vegetation started dying. The quarry was probably rich with nutrients

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By mistake, a quart of oil was dumped into a swimming pool that measures 25.0 m by 30.0 m. The density of the oil was 0.750 g/cm

kondor19780726 [428]

The oil slick thick = 1.256 x 10⁻⁴ cm

<h3>Further explanation</h3>

Volume is a derivative quantity derived from the length of the principal

The unit of volume can be expressed in liters or milliliters or cubic meters

The conversion is

1 cc = 1 cm3

1 dm = 1 Liter

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<em>so for 1 quart = 0.943 L</em>

$\tt 0.943~L=0.943\times 10^{-3}m^3$

Volume of oil dumped = volume of swimming pool

$\tt 0.943\times 10^{-3}~m^3=25\times 30\times h(h=thick)\\\\h=\dfrac{0.943\times 10^{-3}}{750~m^2}=1.257\times 10^{-6}~m=\boxed{\bold{1.256\times 10^{-4}~cm}}$

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What is the average of atomic mass of carbon if 98.90% of the atoms are c-12 and 1.100% are c-13 atoms?

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