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2 years ago

Pls answer

Chemistry

2 answers:

nataly862011 [7]2 years ago

3 0

Answer:

The sound wave travelled more quickly through the glass of water than the metal pole.

The sound wave travelled the fastest through the helium.

The sound wave travelled the slowest through the metal pole.

These 3 are most likely true.

If you have to pick just one, the sound wave travelled the fastest through the helium.

malfutka [58]2 years ago

3 0

Answer:

The true answer is C The sound wave traveled more quickly through the water than the balloon.

Explanation:

I G0T IT RIGHT 0N THE TEST

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Salt in crude oil must be removed before the oil undergoes processing in a refinery. The

irina1246 [14]

Answer:

$\large \boxed{0.64 \, \%}$

Explanation:

Assume you are using 1 L of water.

Then you are washing 4 L of salty oil.

1. Calculate the mass of the salty oil

Assume the oil has a density of 0.86 g/mL.

$\text{Mass of oil} = \text{4000 mL} \times \dfrac{\text{0.86 g}}{\text{1 mL}} = \text{3440 g}$

2. Calculate the mass of salt in the salty oil

$\text{Mass of salt} = \text{3440 g} \times \dfrac{\text{5 g salt}}{\text{100 g oil}} = \text{172 g salt}$

3. Calculate the mass of salt in the spent water

$\text{Mass of salt} = \text{1000 g water} \times \dfrac{\text{15 g salt}}{\text{100 g water}} = \text{150 g salt}$

4. Mass of salt remaining in washed oil

Mass = 172 g - 150 g = 22 g

5. Concentration of salt in washed oil

$\text{Concentration} = \dfrac{\text{22 g}}{\text{3440 g}} \times 100 \, \% = \mathbf{0.64 \, \%}\\\\\text{The concentration of salt in the washed oil is $\large \boxed{\mathbf{0.64 \, \%}}$}$

3 0

2 years ago

Which of the following pairs are isotpes?

grin007 [14]

The answer is B because isotopes have the same number of protons and neutrons.

5 0

3 years ago

The atoms, molecules, or compounds present at the start of a chemical reaction that participate in the reaction.

Art [367]

For the first one the answer is B. and the second one is D.

4 0

2 years ago

Read 2 more answers

Why are you more likely to become dehydrated in hot weather?

Solnce55 [7]

Answer:

sweat

Explanation:

you get dehydrated in hot weather because your body will release sweat to try and keep you cool

7 0

1 year ago

Read 2 more answers

Please check this for me?

kolbaska11 [484]

The answer is
2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g)

Your answer is not yet balanced because you have 3 oxygen atoms. it should be balanced by multiplying both side by 2 such as the balanced equation I made. To check it, I will explain why your answer is not yet balanced.

check: (from your equation)
 1-Pb-1
1-S-1
2 -O-3
the difference between the reactant and the product of Oxygen will prove that it is not yet balanced.

If you use 2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g), to check it:
2-Pb-2
2-S-2
6 -O-6
then this is now balance

6 0

2 years ago