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Zielflug [23.3K]
3 years ago
6

1. How much taller is the average person today than the average person 100 years ago?

Chemistry
1 answer:
andreev551 [17]3 years ago
4 0
5 inches I am not sure but I THINK it’s 5 inches sry if I’m wrong
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In sexual reproduction, an offspring is produced with genes from both parents. When the offspring has a new genetic variation th
Zanzabum

Answer:c a mutation

Explanation:

7 0
3 years ago
Explain why the grams of the nutrient molecules in a food do not add up to the total gram weight of the food.
leva [86]

When we talk about the gram weight of any food item, it may or may not include the gram weight of its different nutrient molecules. It may have different reasons to it. One of the reasons can be because the nutrient molecule might contain a large percentage or proportion of water. Also, the nutrient molecules might be insoluble or indigestible fiber so it does not add up to the total gram weight of food.

5 0
3 years ago
Read 2 more answers
Arrange the following ions in order of increasing ionic radius.
Zepler [3.9K]

Answer:

Ca 2+ <K  +  <Ar<Cl  −  <S  2−

Explanation:

Ar,K  + ,Cl  − ,S  2− ,Ca  2+

 have the same number of electrons. Their radii would be different because of their different nuclear charges. The cation with the greater positive charge will have a smaller radius because of the greater attraction of the electrons to the nucleus. Anion with the greater negative charge will have the larger radius. In this case, the net repulsion of the electrons will outweigh the nuclear charge and the ion will expand in size. Hence the correct order will be Ca  

2+  <K +  <Ar<Cl  −  <S  2−

 

3 0
2 years ago
What kind of chemical bond holds each oxygen atom to the phosphorus atom
MAXImum [283]
This I believe would be double covalent bonds
8 0
3 years ago
Gases A and B are confined to a cylinder and piston and react to form product C. As the reaction occurs, the system loses 1189 J
aliya0001 [1]

Answer:

The change in the internal energy of the system -878 J

Explanation:

Given;

energy lost by the system due to heat, Q = -1189 J (negative because energy was lost by the system)

Work done on the system, W = -311 J (negative because work was done on the system)

change in internal energy of the system, Δ U = ?

First law of thermodynamics states that the change in internal energy of a system (ΔU) equals the net heat transfer into the system (Q) minus the net work done by the system (W).

ΔU = Q - W

ΔU = -1189 - (-311)

ΔU = -1189 + 311

ΔU = -878 J

Therefore, the change in the internal energy of the system -878 J

8 0
3 years ago
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