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chubhunter [2.5K]
3 years ago
13

Which is the correct order of the celestial

Chemistry
2 answers:
Vinvika [58]3 years ago
7 0

Answer:

Which is the correct order of the celestial

bodies during a solar eclipse?

<u><em>A. Sun, Moon, Earth </em></u> the right answer good luck

Karolina [17]3 years ago
3 0
Answer: A. Sun, Moon, Earth
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The following thermochemical equation is for the reaction of sodium(s) with water(l) to form sodium hydroxide(aq) and hydrogen(g
ra1l [238]

Answer:

1) When 6.97 grams of sodium(s) react with excess water(l), 56.0 kJ of energy are evolved.

2) When 10.4 grams of carbon monoxide(g) react with excess water(l), 1.04 kJ of energy are absorbed.

Explanation:

1) The following thermochemical equation is for the reaction of sodium(s) with water(l) to form sodium hydroxide(aq) and hydrogen(g).

2 Na(s) + 2H₂O(l) ⇒ 2NaOH(aq) + H₂(g) ΔH = -369 kJ

The enthalpy of the reaction is negative, which means that 369 kJ of energy are evolved per 2 moles of sodium. The energy evolved for 6.97 g of Na (molar mass 22.98 g/mol) is:

6.97g.\frac{1mol}{22.98g} .\frac{-369kJ}{2mol} =-56.0kJ

2) The following thermochemical equation is for the reaction of carbon monoxide(g) with water(l) to form carbon dioxide(g) and hydrogen(g).

CO(g) + H₂O(l) ⇒ CO₂(g) + H₂(g)  ΔH = 2.80 kJ

The enthalpy of the reaction is positive, which means that 2.80 kJ of energy are absorbed per mole of carbon monoxide. The energy evolved for 10.4 g of CO (molar mass 28.01 g/mol) is:

10.4g.\frac{1mol}{28.01g} .\frac{2.80kJ}{mol} =1.04kJ

3 0
3 years ago
Which of the following is NOT considered a branch of Chemistry?
mestny [16]

Answer:

Pure Chemistry -- is NOT considered a branch of Chemistry.

Explanation:

Second question is number 4.

4 0
3 years ago
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What would be the most likely explanation if none of the tested paint samples had turned brown?
mariarad [96]

Answer:4/d

Explanation:

i did this before

7 0
3 years ago
1. Communication is an important last step of the scientific method. What is the best reason to communicate conclusions?
Shalnov [3]
1. A
2.C
3.A
4.C
5.B

I really hope this isn't cheating and that you can actually do this for yourself and you just want to double check. To study just read the Scientific Method and memorize it
6 0
3 years ago
What is the product of 392 and 0.13592 with the correct sisignificant digits and proper scientific notation
WITCHER [35]

the correct answer is-

 5.33*10

4 0
3 years ago
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