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s2008m [1.1K]
3 years ago
8

Help plz :)) <3 i’m confused

Chemistry
1 answer:
Zarrin [17]3 years ago
7 0

Answer:

gained 2

Explanation:

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List in ascending order the different layers of atmosphere, their heights, and main their features. Help please!!! :•)
Anika [276]

Answer:

Troposphere

Stratosphere

Mesosphere

Thermosphere

Exosphere

Explanation:

These are all listed in ascending order, hope this helps!

6 0
3 years ago
HELP! What is the percent composition of carbon in caffeine (C₈H₁₀N₄O₂)? Show your work
Dominik [7]

Caffeine has the following percent composition: carbon 49.48%, hydrogen 5.19%, oxygen 16.48% and nitrogen 28.85%. Its molecular weight is 194.19 g/mol.

8 0
3 years ago
Which option is an example of a chemical property?
strojnjashka [21]
Answer: B= Rusting ability
Explanation:
Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.
Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.
1. Boiling point: is a physical property as there is a change of state.
2. Rusting ability: is a chemical property as there is formation of new substances.
3. Melting point: is a physical property as there is a change of state.
4. Density: is a physical property as there is no formation of new substances.
5 0
2 years ago
3. Sodium carbonate (Na2CO3) is formed from the reaction between
user100 [1]

Na2C03 is formed through the reaction of

NaOH and H2CO3 namely sodium hydroxide and carbonic acid

NaOH -> strong base

H2CO3-> weak acid

8 0
3 years ago
Read 2 more answers
Gold has a density of about 20g/mL. If I measured out 2mL of gold, I would expect it to have a mass of about ___ grams.
yan [13]
The answer is 40 grams. If gold is 20 grams per mL and you have 2 mLs, you get 40 grams of gold. Just add 20 + 20 or multiply 2 x 20 to get 40.
4 0
3 years ago
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