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3 years ago

HELPPPPPPPPPP!!!!!!!!!!!!!!

Chemistry

2 answers:

Aleks [24]3 years ago

5 0

Answer:

a lighthouse on a nearby island

Explanation:

The ships passengers are moving at the same velocity as the ship therefore according to their reference point the ship is not moving. The same is true with the captain and the cargo inside the hull of the ship. But from a light house , which has a different velocity as the ship, the ship is moving.

To help you understand, look at a person sat next to you in the car, does it look like that person is moving? No, because you have the same velocity as them. Now look outside at the ground, it looks like it is moving because you have different velocities.

SOVA2 [1]3 years ago

4 0

The Answer is D cause of the people going back and forth.

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3 years ago

What mass of NaOH is in 3.0e+02 mL of a 5.0 M NaOH solution?

Snezhnost [94]

Answer is: mass of sodium hydroxide is 60 grams.
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2 years ago

The process of cellular respiration shown in #11 produces atp by rejoining a phosphate group with the adp molecule. where do you

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3 years ago

Write a method that could be used to produce pure crystals of copper chloride from copper oxide and hydrochloric acid.

joja [24]

- Describe how you would make the salt from the reactants.

CuO + 2 HCl → CuCl₂ + H₂O

- Describe how you would purify the salt from the reaction mixture.

Filter the solution and let the product crystallize.

Explanation:

The reaction between copper oxide (CuO) and hydrochloric acid (HCl) will produce copper chloride (CuCl₂) and water:

CuO + 2 HCl → CuCl₂ + H₂O

-Describe how you would make the salt from the reactants

In a beaker which contain cooper oxide add the hydrochloric acid. To avoid working with concentrated hydrochloric acid, the acid may be diluted with water but make sure the add the stoechiometric amount (and a little bit of excess) in respect with the copper oxide.

-Describe how you would purify the salt from the reaction mixture.

Let the reaction proceed and then filter the solution to remove the unreacted cooper oxide.

Let the filtered solution, which contain copper chloride, water and unreacted hydrochloric acid, to stand undisturbed for several days. You may see the crystals growing from the solution. To speed up the process you may reduce the temperature.

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purifying compounds

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3 years ago

How many moles are in 9.12 x 1023 molecules of sugar?

aleksandrvk [35]

Answer:

1.514 moles

Explanation:

For this problem you want to use dimensional analysis and cancel out your molecules of sugar and be left with moles of sugar. We know that 1 mole (of anything) = 6.022 x 10 ^ 23 molecules, so we should use that conversion to help us. Start with 9.12 x 10 ^23 molecules and divide by 6.022 x 10 ^ 23 molecules, and you will be left with moles.

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2 years ago