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monitta
3 years ago
8

TRUE OR FALSE QUESTIONS

Chemistry
1 answer:
Mademuasel [1]3 years ago
4 0

18: <u>FALSE</u> The physical properties of metals include <u>shininess</u>, malleability, ductility, and conductivity.

19: <u>FALSE</u> Neutrons are the particles in an atom that have a <u>neutral charge</u>. They aren't positive like protons. They aren't negative like electrons.

20: <u>TRUE </u>Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He is best remembered for formulating the Periodic Law and creating a farsighted version of the periodic table of elements. He is also known as the "<u>father of the periodic table"</u>

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Calculate the average atomic mass of rubidium. Rubidium has two isotopes, 85Rb and 87Rb. 85Rb has an atomic mass of 84.912 amu a
astraxan [27]
<span>Answer : The average atomic mass of rubidium = 85.468 Explanation: Given that 85Rb isotope has atomic mass of 84.912amu with abundance of 72.17% therefore we get 84.912 x 0.7217 = 61.281 and 87Rb isotope has atomic mass of 86.909 with abundance of 27.83% hence we get 86.909 x 0.2783 = 24.187 Thus we get 61.281 + 24.187 = 85.468 as the average atomic mass of Rubidium.</span>
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3 years ago
What properties do molecules usually share?
N76 [4]
They contain atoms including nucleus proton electron and neutron
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3 years ago
Which subatomic particles are found in the nucleus of an oxygen atom?
Ipatiy [6.2K]

Answer:

the answer is protons and neutrons

Explanation:because

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3 years ago
Can some one help I'm lost iam being timed:( Show using two conversion factors how you would convert from 0.020 kg into mg
dezoksy [38]

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20000 Mg

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3 years ago
How are muscles able to keep making energy even when no food is eaten and glucose levels are low?
erastova [34]

Although lipids hold the majority of the body's energy reserves, glycogen is the body's primary energy source.

Glucose is a polymer that makes up glycogen. Our body's primary source of energy is carbs. The remaining glucose in the body is turned into glycogen and stored in various places, but the majority of our body's energy reserves are found in fats, which are kept in the form of lipids.

Where does the energy come from in the muscles?

The chemical energy that is stored in our meals is used by muscles to produce heat and motion energy (kinetic energy). Energy is necessary for maintaining body temperature, promoting physical activity, and enabling tissue growth and repair. Foods high in protein, fat, and carbohydrates provide energy.

What Takes Place to Muscles in the Absence of Glucose?

Your body converts carbs, such as those found in bread or fruit, into glucose after consumption. Glycogen is the form of glucose that is stored in your muscles and liver and is used for energy when you are not eating or while you are exercising.

To learn more about source of energy in body, visit

brainly.com/question/7493628

#SPJ13

7 0
1 year ago
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