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harina [27]
3 years ago
5

What type of change occurs during a chemical reaction?

Chemistry
1 answer:
posledela3 years ago
8 0

Answer:

physical change.

Explanation:

because it changes its physical attributes

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Richard Arkwright is known as father of modern factory system​ why?
Arturiano [62]

Answer:

He started factories and mills. He created World's first water- powered mill at Cromford, where he employed more than 200 people. This was just the beginning of the many factories which he would later set up. Because of this, Arkwright was known as the father of the modern industrial factory system........Hope you got it

7 0
3 years ago
A solution with a pH of 11 has a [H+] of...
hram777 [196]

Answer:

c. 1×10^-11

Explanation:

ph= -log[H+]

[H+]= 10^-ph

=10^-11

= 1×10^-11

8 0
3 years ago
A solution contains 2 moles of hydrochloric acid.the volume of the solution is 250 cm3
Crazy boy [7]

Answer:

1dm = 10cm

1dm3 = 10cm x 10cm x 10cm = 1000cm3

1L = 1000cm3

so 1litre = 1dm3

4 moles in 2 dm3

= 2 moles in 1dm3 = 2moles in 1L = 2M

1L = 1000cm

0.3 moles in 200cm3 =

200cm3 = 0.2L

so 0.3 moles in 0.2 L = 1.5 moles in 1 L = 1.5M

(I have tried to simplify and show why 1dm3 = 1L)

I hope this helps you understand!

8 0
3 years ago
1. What do the ice ages tell us about how Earth's<br> climate has changed in the past?
Levart [38]

Answer:

During ice ages, the most characteristic change to the planet has been the formation and spread large ice sheets and glaciers across much the Northern Hemisphere.

3 0
3 years ago
When CO2 decomposes into oxygen and carbon, it gives a gram ratio of 2.67:1 O2:C. When a 32.4g of CO2 decomposes, how many grams
Rufina [12.5K]

Answer : The mass of carbon and oxygen produced is 8.83 g and 23.6 g respectively.

Explanation :

Law of conservation of mass : It states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

The balanced chemical reaction will be,

CO_2\rightarrow O_2+C

As we are given:

\text{Mass of }O_2}:\text{Mass of }C=2.67:1{

According to the law of conservation of mass,

Total mass of CO_2 = Mass of O_2 + Mass of C

Total mass of CO_2 = 2.67 + 1 = 3.67 g

Now we have to calculate the mass of O_2 and C.

\text{Mass of }O_2=\frac{\text{Given mass of }CO_2}{\text{Total mass of }CO_2}\times \text{Given mass of }O_2=\frac{32.4g}{3.67g}\times 2.67=23.6g

and,

\text{Mass of }C=\frac{\text{Given mass of }CO_2}{\text{Total mass of }CO_2}\times \text{Given mass of }C=\frac{32.4g}{3.67g}\times 1=8.83g

Therefore, the mass of carbon and oxygen produced is 8.83 g and 23.6 g respectively.

6 0
3 years ago
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