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tatyana61 [14]
3 years ago
9

What is true about all forces?

Chemistry
2 answers:
Feliz [49]3 years ago
6 0

Answer:1) true

2) true

3) false

4)true

Explanation:

Usimov [2.4K]3 years ago
3 0

Answer:

B. They involve more then one object.

Explanation:

I learned about it and found the answer.

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What is the total number of oxygen atoms represented in the formula na2c03.10h2o?
Wewaii [24]

As per the given chemical formula- Na2CO3.10H2O, one mole of the chemical compound contains 13 moles of oxygen atoms. Hence

Number of moles of oxygen atoms in one mole of Na2CO3.10H2O = 13

number of moles of oxygen atoms in 0.2 moles of Na2CO3.10H2O = 13 X 0.2 = 2.6

Now, one mole of a substance contains 6.022 X 10^23 particles of the substance. Thus

number of atoms of oxygen in one mole of oxygen atom = 6.022 X 10^23

number of moles of oxygen atoms in 2.6 moles of oxygen atoms = 2.6 X 6.022 X 10^23 = 15.657 X 10^23

= 1.566 X 10^24

Thus, there are 1.566 X 10^24 atoms of oxygen in 0.2 moles of Na2CO3.10H2O.
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Explain the relationship between an individual and a Society​
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Answer:

the relationship between an individual and a society is society doesn't exist independently without an individual .the individual lives and acts within society but society is nothing ,in spite of the combination of individual s for cooperation effort.

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2 years ago
The maximum number of orbits in an atoms is____.<br> A) 3<br> B) 5<br> C) 7<br> D) 9
Mashcka [7]
The answer///////////b, 5 orbits
5 0
3 years ago
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How much heat (in kilojoules) is evolved or absorbed in the reaction of 1.90g of Na with H2O ?
irina1246 [14]
The heat of the reaction is an extensive property: it is proportional to the quantity of the quantity that reacts.

The change in enthalpy is a measured of the heat evolved of absorbed.

When the heat is released, the change in enthalpy is negative.

The reaction of 2 moles of Na develops 368.4 kj of energy.

Calculate the number of moles of Na in 1.90 g to find the heat released when this quantity reacts.

Atomic mass of Na: 23 g/mol

#mol Na = 1.90 g / 23 g/mol = 0.0826 mol

Do the ratios: [368.4 kj/2mol ] * 0.0826 mol = 15.21 kj.

Then the answer is that 15.21 kj of heat is released (evolved)
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What is the function of control rods in a nuclear reactor?
trapecia [35]
The answer is
C. Control reaction rate
hope it helps :)

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