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3 years ago

Helppppp!!!! Please.....

Chemistry

1 answer:

Inessa05 [86]3 years ago

6 0

Club soda so A, you just gotta match the color that it says for it to the chart and it’ll show the identity the ph which is four I believe It said

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A chemical change occurs when an egg cooks. What effect does cooking have on the physical properties of an egg?

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3 years ago

PLEASE HELP! THANK YOU SO MUCH!!!!!!

Bad White [126]

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3 years ago

Name a chemical that is safe to use in food in small amounts.

Mrrafil [7]

Answer:

Phthalates.

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Explanation:

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2 years ago

A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 × 1027 g. Use this information to answer the questions below. Be su

Vedmedyk [2.9K]

Answer:

a) $2.4\times 10^{24} kg$ is the mass of 1 mole of bricks.

b) $2.5\times 10^3$ moles of bricks have a mass equal to the mass of the Earth.

Explanation:

a) Mass of brick = 4.0 kg

1 mole = $N_A=6.022\times 10^{23}$ particles/ atoms/molecules

Mass of $N_A$ bricks :

$=6.022\times 10^{23}\times 4.0 kg=2.4088\times 10^{24} kg\approx 2.4\times 10^{24} kg$

$2.4\times 10^{24} kg$ is the mass of 1 mole of bricks.

Mass of the Earth = M = $6.0\times 10^{27} kg$

Mass of 1 mole of brick = m= $2.4\times 10^{24} kg$

Let the moles of brick with equal mass of the Earth be x.

$m\times x=M$

$x=\frac{M}{m}=\frac{6.0\times 10^{27}kg}{2.4\times 10^{24} kg}=2.5\times 10^3$

$2.5\times 10^3$ moles of bricks have a mass equal to the mass of the Earth.

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3 years ago

What does complex mean? PLEASE HELP ME

wolverine [178]

Complex meaning more complicated and detailed in difficulty

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3 years ago

Read 2 more answers