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oksano4ka [1.4K]
3 years ago
13

One situation indicates a physical change rather than a chemical change. which situation indicates a physical change

Chemistry
1 answer:
Goryan [66]3 years ago
3 0

if you were to fold a piece of paper into a bunch of pieces.

Explanation:

its just a different shape but it's still the same piece of paper

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Enzymes make reactions MUCH easier and/or faster by
zimovet [89]

Answer:

A is correct...B and C wrong I believe

Explanation:

So basically the reason A should be correct is because all enzymes do is provide alternative mechanisms for reaction to proceed and in that alternative mechanism the activation energy is lowered allowing the reactions to progress at greater speeds.

So A makes sense because The aerodynamic shape of a car, like an enzyme, does not supply energy to the car, but it can make it easier for the car to move (basically like an enzyme the car's shape is allowing the car to move faster... enzymes are not consumed in a reaction; they simply help it to occur.)

B is not correct because enzymes do not provide energy for reaction to occur. All they provide is an alternate mechanism where the activation energy is lowered so the reactions can occur at greater rate.

C is not correct because some reactions can occur without enzymes its just that they will occur at a much slower speed.

Hope this helps! I think this should be correct plz double check with your friends.

3 0
3 years ago
Cual Fue la teoria de la<br>Cuatro elementos​
Oliga [24]

Answer:

The ancient Greeks believed that there were four elements that everything was made up of earth, water, air, and fire.

Los antiguos griegos creían que había cuatro elementos y que todo estaba compuesto de tierra, agua, aire y fuego.

Explanation:

5 0
3 years ago
Calculate the molarity of an hcl solution if a 10.00 ml sample requires 25.24 ml of a 1.600 m naoh solution to be neutralized.
AlladinOne [14]

Answer:

The molarity of the HCl solution should be 4.04 M

Explanation:

<u>Step 1:</u> Data given

volume of HCl solution = 10.00 mL = 0.01 L

volume of a 1.6 M NaOH solution = 25.24 mL = 0.02524 L

<u>Step 2:</u> The balanced equation

HCl + NaOH → NaCL + H2O

Step 3: Calculate molarity of HCl

n1*C1*V1 = n2*C2*V2

Since the mole ratio for HCl and NaOH is 1:1 we can just write:

C1*V1 =C2*V2

⇒ with C1 : the molarity of HCl = TO BE DETERMINED

⇒ with V1 = the volume og HCl = 10 mL = 0.01 L

⇒ with C2 = The molarity of NaOH = 1.6 M

⇒ with V2 = volume of NaOH = 25.24 mL = 0.02524 L

C1 * 0.01 = 1.6 * 0.02524

C1 = (1.6*0.02524)/0.01

C1 = 4.04M

The molarity of the HCl solution should be 4.04 M

6 0
3 years ago
True or False<br> Helium belongs to Noble Metals
Lostsunrise [7]

Answer:

This answer is "True"

6 0
3 years ago
Read 2 more answers
What are the smallest organelles in cell that are not enclosed in a membrance and they make protien
levacccp [35]
Ribosomes.ribosomes are small structures where proteins are made.Although they are not enclosed within a membrane,they are frequently considered organelles. Hope it helps :)
4 0
3 years ago
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