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MaRussiya [10]
3 years ago
9

Jill graphs the speed of a model train that is travelling at a speed of 15 kilometers per hour. Which graph shows the speed of t

he model train?

Chemistry
1 answer:
Tasya [4]3 years ago
8 0

Answer:c

Explanation:

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What is a diatom?
mezya [45]

Answer:

a molecule with two of the same element

Explanation:

3 0
3 years ago
How many atoms are in 187 g of Calcium?
N76 [4]
Atomic mass Calcium ( Ca) = 40.078 u.m.a

40.078 g --------------- 6.02x10²³ atoms
187 g ------------------- ??

187 x ( 6.02x10²³) / 40.078 =

1.125x10²⁶ / 40.078 = 2.808x10²⁴ atoms

hope this helps!




4 0
4 years ago
The table shows the pH levels of four common items. If a student tests a sample of each item, which will turn a strip of red lit
podryga [215]
The answer is d, hand soap.

Hand soap is alkaline and red litmus paper turns blue when exposed to alkaline solution.
3 0
3 years ago
Describe some acidic oxides that can be prepared by thermal decomposition of nitrates and carbonates
azamat

When calcium carbonate is heated, it breaks down to form calcium oxide and carbon dioxide.

Thermal decomposition is the process in which heat is required.

It is also known as thermolysis.

It is processed in which a compound breaks into two or more products when the heat is supplied.

This reaction is used for the production of oxygen.

This reaction is also used for production of acidic as well as basic oxides.

CaCO3 on thermal decomposition gives:

CaCO3→CaO+CO2

CaO→ Basic oxide.

CO2→ Acidic oxide.

6 0
3 years ago
what gas was given off when hydrogen peroxide is broken down? recall that the formula for hydrogen peroxide is h2o2?
Anna35 [415]
When hydrogen peroxide is broken down the gas released or given off is Oxygen. 
5 0
3 years ago
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