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Likurg_2 [28]
3 years ago
15

Why are there only two elements in the first row of the periodic table?

Chemistry
1 answer:
Wittaler [7]3 years ago
7 0
Look in the internet
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What is defined as the ability to do work or to cause changes in matter?
abruzzese [7]

Answer:

energy

Explanation:

4 0
2 years ago
VA 19.75-g sample was heated by 12.35 calories. The specific heat of the sample is 0.125 cal/g°C. What was the initial temperatu
SOVA2 [1]

Answer:

31.9 °C  

Explanation:

The formula for the heat q absorbed by an object is

q = mCΔT where ΔT = (T₂ - T₁)

Data:

q = 12.35 cal

m = 19.75 g

C = 0.125 cal°C⁻¹g⁻¹

T₂ = 37.0 °C

Calculations

(a) Calculate ΔT

q = mCΔT

12.35 cal = 19.25 g × 0.125 cal°C⁻¹g⁻¹ × ΔT

12.35 = 2.406ΔT °C⁻¹  

ΔT  = 12.35/(2.406 °C⁻¹) = 5.13 °C

(b) Calculate T₂

ΔT = T₂ - T₁

T₁ = T₂ - ΔT = 37.0 °C - 5.13 °C = 31.9 °C

The original temperature was 31.9 °C.

 

6 0
3 years ago
The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy, is nuclear .
IgorC [24]

It's nuclear fission

6 0
2 years ago
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calculate the volume of carbon dioxide of room temperature and pressure obtained from 30 grams of glucose​
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A

Explanation:

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How many neutrons does an atom of Uranium 240?
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Number of neutrons is equal to 148.

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