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Inga [223]
3 years ago
15

WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!! WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY

TO LEARN!! WILL FOREVER BE GREATFUL!!!
WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!

5. What type of reaction would the heat calculation in previous question be classified as?

A) Natural

B) Chemical

C) Endothermic

D) Exothermic

7. What causes the volume to change in gases? (Choose all that apply)

A) Density

B) Temperature

C) Shape of container

D) Pressure
Chemistry
1 answer:
notsponge [240]3 years ago
7 0

Answer:

for the first one we need the previous question to be able to answer it. for the second one density and temperature

Explanation:

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If a gas’s [kelvin] temperature doubles and it’s volume then remains the same, then what happens to it’s pressure?
Tamiku [17]

Answer:

The final pressure will double i.e it will be twice the initial pressure

Explanation:

T1 = T

T2 = 2T ( twice the original T)

P1 = P

P2 =?

Since the volume is constant,

P1/ T1 = P2 /T2

P/ T = P2 / 2T

Cross multiply

T x P2 = 2T x P

Divide both side by T

P2 = (2T x P) / T

P2 = 2P

Therefore, the final pressure will double i.e it will be twice the initial pressure

5 0
3 years ago
Problema 5
malfutka [58]

Answer:

dwwq is a lot more than a lot more than a year ago and I am a very young ers and I

33rd century fox was a great place to girl and I was a little bit older than a couple of years ago and I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit older than I was a little bit

Explanation:

read the full article below to see how the upper c and other factors of a child are at risk for the child or child care act and a lot 5AM in 555inches of a child is filtration of a single person who is filtration

4 0
3 years ago
Which has a higher concentration of water molecules— 200 molecules of water, or a mixture of 300 molecules of water and 100 mole
Dovator [93]
<h3>Answer:</h3>

            200 molecules of water has the highest concentration.

<h3>Explanation:</h3>

                    In chemistry, Concentration is defined as the amount of substance divided by the total volume of the constituents making the mixture.

<u>Case 1:</u> 200 Molecules of Water:

                                                     In this case we are having system which is made up of 200 purely water molecules and there is no other substance present in the system. Hence, for ease we can write it as,

           Concentration  =  Molecules of Water ÷ Total Molecules of Mixture

           Concentration  =  200 ÷ 200

           Concentration  =  1

<u>Case 2:</u> 300 Molecules of Water and 100 Molecules of Food Coloring:

                                                     In this case we are having a mixture which is made up of 300 water molecules and 200 food coloring molecules. Hence, we can write it as,

           Concentration  =  Molecules of Water ÷ Total Molecules of Mixture

           Concentration  =  300 ÷ (300 + 200)

           Concentration  =  300 ÷ 500

           Concentration  =  0.6

Therefore, it is proved that the concentration of pure 200 molecules of water is greater.

7 0
4 years ago
How many molecules are 4.3 x 10^27 molecules of N2O5<br>​
horrorfan [7]

Answer:

<h2>7142.86 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.3 \times  {10}^{27} }{6.02 \times  {10}^{23} }  \\  = 7142.857...

We have the final answer as

<h3>7142.86 moles</h3>

Hope this helps you

6 0
3 years ago
What is the sum of the coefficients of the balanced equation for:
Marianna [84]

Answer:

3 Pb(NO3)2 + Al2(SO4)3 = 2 Al(NO3)3 + 3 PbSO4

Explanation:

I think your equation is incorrect? This is balanced and the sum of coefficients is 9.

5 0
3 years ago
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