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miv72 [106K]
3 years ago
9

Which one of the following objects has potential energy?

Chemistry
1 answer:
Mila [183]3 years ago
3 0
A is the right answer
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How many grams of HCL are needed to make 500.0 mL of a 0.100 M solution?
Brums [2.3K]

Answer:

1.44 g

Explanation:

The problem gives you the molarity and volume of the target solution, so right from the start you know that you can use that information to determine the number of moles of hydrochloric acid that it must contain.

So, molarity measures a solution's concentration in terms of how many moles of solute, which in your case is hydrochloric acid, you get per liter of solution.

A

0.158 M

hydrochloric acid solution contains

0.158

moles of hydrochloric acid for very liter of solution. Since you're dealing with

250 mL

, the equivalent of

1

4

th

of a liter, your solution will contain

250

mL

⋅

1

L

10

3

mL

⋅

0.158 moles HCl

1

L

=

0.0395 moles HCl

Now that you know how many moles of hydrochloric acid are needed to prepare your solution, use the compound's molar mass to convert this to grams

0.0395

moles HCl

⋅

36.46 g

1

mole HCl

=

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

1.44 g

a

a

∣

∣

−−−−−−−−−−

Explanation:

Please  brainliest.

4 0
3 years ago
g n the following three compounds(1,2,3) arrange their relative reactivity towards the reagent CH3Cl / AlCl3. Justify your order
Sedbober [7]

Answer:

3 > 2> 1

Explanation:

Aromatic compounds undergo electrophilic substitution reaction which passes through a positively charged intermediate to yield the product.

Substituted benzenes may be more or less reactive towards electrophilic aromatic substitution than benzene molecule depending on the nature of the substituent.

Certain substituents increase the ease of reaction of benzene towards aromatic substitution.

If we look at the compounds closely, we will notice that toluene reacts readily with CH3Cl / AlCl3. This is because, the methyl group is electron donating hence it stabilizes the positively charged intermediate produced in the reaction.

Carbonyl compounds are electron withdrawing substituents hence they decrease the magnitude of the positive charge and hence decrease the rate of electrophilic aromatic substitution.

3 0
3 years ago
What are two ways that scientists u measure temperature
anygoal [31]

Using the same anchor points, he determined the freezing temperature for water to be 0 degree and the boiling temperature 100 degrees. The Celsius scale is known as a Universal System Unit. It is used throughout science and in most countries.


8 0
3 years ago
A generator is not required to generate electrical energy when which of the following energy sources is used?
Anon25 [30]

Answer:

think it's C but my gut is telling me A

Explanation:

5 0
3 years ago
Read 2 more answers
Cells come from the reproduction of
levacccp [35]
They come from the reproduction of existing cells
8 0
4 years ago
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