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KIM [24]
3 years ago
13

I WILL GIVE BRAINLIEST!!!!

Chemistry
2 answers:
amm18123 years ago
8 0
The answer is B. T<span>o protect the earth from harmful UV rays.</span>
dalvyx [7]3 years ago
5 0

First commenter is correct. The ozone layer acts as a world-wide umbrella that is able to protect the earth from harmful UV rays.

You might be interested in
How many carbon atoms are there in a 1.3-carat diamond? diamonds are a form of pure carbon. (1 carat?
Colt1911 [192]
How many carbon atoms are there in a 1.3-carat diamond? Answer: 1.3 x 10^22 C atoms...
If a 1 carat = 0.20 g ... then 0.3 carat = 0.20 / 0.3 = 0.06 g
Thus, 1.3 carat = 0.26g
Find the moles first:
Moles= Grams / Mm of C
0.26 / 12.011 = 0.0216 mols of C
Atoms = Moles * Avogadro's number (6.022*10^23)
0.0216 * 6.022*10^23 = 1.3*10^22 C atoms

Hope this helps! :)
8 0
3 years ago
Read 2 more answers
If NaCl has a mass of 3.2g, what is the volume of chlorine gas at STP?
Shalnov [3]

Hey there!

Molar mass NaCl = 58.44 g/mol

58.44 g ----------------- 22.4 ( at STP )

3.2 g -------------------- Volume ??

Volume = ( 3.2 x 22.4 )  / 58.44

Volume = 71.68 / 58.44

Volume = 1.226 L

Hope this helps!

5 0
3 years ago
Read 2 more answers
Two substances that a green plant must obtain from its environment to carry on photosynthesis
mafiozo [28]

Answer:

Carbon Dioxide and Water

4 0
3 years ago
In a science experiment, Javi concludes that a chemical reaction has occurred. What evidence would support this conclusion?
Naily [24]

Answer:

B) a substance's color and odor changed        Explanation: A signal that a chemical change has occurred is when its odor (its smell) or its appearance has changed.

8 0
3 years ago
Read 2 more answers
For each of the following amounts, calculate the mass
nalin [4]

The masses of the following amount of compound are as follows:

a. 2080.12 grams of barium iodide

b.1139.2 grams of sulphur dioxide

c. 96.25 grams of AspirinTM

d. 27.144 grams of magnesium nitrite

The molarity formula is represented as follows;

molarity = mass / molar mass

Recall we are ask to find the masses of the compounds. Therefore,

  • mass = molarity × molar mass

<h3>Mass of BaI₂</h3>

a 5.32 mol barium iodide, BaI₂

molarity = 5.32 mol

molar mass of  BaI₂ = 137 + 127(2) = 137 + 254 = 391 g/mol

mass = 5.32 × 391 = 2080.12 grams.

<h3>Mass of SO₂</h3>

b. ) 17.8 mol sulphur dioxide, SO₂

molarity = 17.8 mol

molar mass of SO₂  = 32 + 32 = 64 g /mol

mass = 17.8 × 64 = 1139.2 grams.

<h3>Mass of CHO₄</h3>

c. 1.25 mol AspirinTM, CHO₄

molarity = 1.25 mol

molar mass of  CHO₄ = 12 + 1 + 64 = 77 g / mol

mass = 1.25 × 77 = 96.25 grams

<h3>Mass of Mg(NO₂)₂</h3>

d. 0.234 mol magnesium nitrite, Mg(NO₂)₂

molarity = 0.234 mol

molar mass = 24 + 14(2) + 32(2) = 24 + 28 + 64 = 116 g/mol

mass = 116 × 0.234 = 27.144 grams.  

learn more on masses here: brainly.com/question/10312739?referrer=searchResults

6 0
2 years ago
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