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frosja888 [35]
3 years ago
13

! WILL GIVE BRAINLIST !

Chemistry
1 answer:
Zanzabum3 years ago
8 0

D is the answer. This is a natural feeling to feel.

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How do the circulatory, respiratory, or digestive systems work together?
Alexandra [31]

Answer:

by pumping blood throughout the body.

Explanation:

7 0
2 years ago
The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and in
motikmotik

Answer:

D. 40 % increase  

Step-by-step explanation:

r = k[A]²/[B]

The rate is inversely proportional to [B]. If [B] is doubled, the rate is halved.

We must double this rate to get back to the original.

The rate is directly proportional to [A]².

2 = [A]₂/[A]₁²     Take the square root of each side

√2 = [A]₂/[A]₁     Multiply each side by [A]₁

[A]₂ = √2[A]₁

[A]₂ = 1.41[A]₁

We must increase [A] by 41 %.

6 0
3 years ago
Which source of energy causes most of the water evaporation on Earth’s surface?
coldgirl [10]
Which adds the most energy to the earth?  Solar.  So Solar will cause the most evaporation (B)
3 0
2 years ago
Read 2 more answers
Which of the following is a nonmetallic mineral resource?. A. wood . B. iron . C. coal . D. aggregate
sesenic [268]

Answer: The correct option is D.

Explanation: Nonmetallic minerals are the chemical elements from which no new product can be formed when they are melted. For Example: Sand, marble etc..

For the given options:

Option A: Wood is a type of cellulose and is not considered as a nonmetallic mineral resource.

Option B: Iron is an element because it is the smallest substance which cannot be broken down. It is not considered as a nonmetallic mineral resource.

Option C: Coal is a mixture of carbon compounds. This is very close to mineral but is an organic mineral because it contains carbon atom. Hence, it is not considered as a nonmetallic mineral resource.

Option D: Aggregate is  formed by the collection of particles forming a whole mass. This is a non-metallic resource as it cannot form any new product.

Hence, the correct option is D.

8 0
3 years ago
Read 2 more answers
Relative to protons, electrons have:
saw5 [17]

Answer:

<u><em>(B.) a significantly lower mass that protons</em></u>

Explanation:

The mass (in g) of an electron is 9.11 ×10^{-28}g, which is significantly lower than the mass of protons and neutrons which are approximately the same. They are extremely small (equal to 0 amu), contributing nothing to the overall mass of the atom.

The nucleus has a mass of 1 amu and is positively charged.

6 0
3 years ago
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