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nordsb [41]
4 years ago
6

Which of the following discovery led mankind to observe changes in certain rocks and minerals which further led to the developme

nt of ceramics, glass, and metals?
a. Plasma
b. Plastic
c. Fire
d. Neoprene
e. Rubber
Chemistry
1 answer:
BARSIC [14]4 years ago
5 0

Answer:

A

Explanation:

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How many grams of sodium azide are required to form 16.55g of nitrogen gas in
MrRissso [65]

Answer:

16.8128 grams of sodium azide is needed

Explanation:

2NaN3 = 2Na + 3N2

molar mass of NaN3 =

2(11 + (7  \times 3) = 64

molar mass of N2

3(7 \times 2) = 42

moles of N2 =

moles=mass/R.F.M

16.55÷42 = 0.3940

mole ratio=

2NaN3 : 3N2

3 = 0.3940

2=?

0.394. \times 2 \div 3 = 0.2627

Mass of sodium azide =64×0.2627

=16.8126

6 0
3 years ago
Antacids relif hyperacidity. why? plz help me!!!!​
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Antacid is a substance which neutralizes excess acid secreted by the stomach.So by using it ,it will neuralize the excess acidity and prevents heart burns etc.
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3 years ago
What type of energy transformation happens during photosynthesis?
GaryK [48]

Answer:

radiant - chemical is the best answer

3 0
3 years ago
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Lunna [17]

My thought would be B) gases.

I could be wrong but that's what i'd say


4 0
4 years ago
Persuasive argument against the nuclear warfare
antoniya [11.8K]
That only 250 warhead are needed to put the earth in nuclear winter
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They produce high amount of radiation when you make them
Once produced they take a long time to dismantle.

I know everything about nukes so don’t hesitate to ask me about the topic:)
7 0
4 years ago
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