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lara31 [8.8K]
3 years ago
8

If nearly all scientist agree with a theory, it may be called______

Chemistry
2 answers:
AleksAgata [21]3 years ago
4 0
A hypothesis or a law
liberstina [14]3 years ago
4 0

Answer:

A , principle or law

Explanation:

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How many grams of sodium are in 0.820 moles of na2so4?
s344n2d4d5 [400]
<span>the molar mass of a compound is the sum of the products of the atomic masses by the number of atoms of the element.
molar mass of Na</span>₂SO₄<span> is - 142 g/mol.
1 mol of </span>Na₂SO₄<span> has a mass of 142 g.
In 1 mol of </span>Na₂SO₄<span> the mass of Na is 23 g/mol x 2 = 46 g.
                             
Mass of Na in 1 mol of </span>Na₂SO₄ is - 46 g
                           
mass of Na in 0.820 mol of Na₂SO₄ - 46 g /1 mol x 0.820 mol = 37.72 g.
mass of Na is 37.72 g
5 0
4 years ago
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The common ion effect for ionic solids (salts) is to decrease the solubility of the ionic compound in water significantly. Expla
MrMuchimi

Answer:

Explanation has been given below.

Explanation:

Let's consider solubility equilibrium of an ionic insoluble compound e.g. BaSO_{4}

BaSO_{4}\rightleftharpoons Ba^{2+}+SO_{4}^{2-}

Equilibrium constant of this solubility equilibrium is represented in terms of solubility product (K_{sp}) which is expressed as-

K_{sp}=[Ba^{2+}][SO_{4}^{2-}]

Now, if we add an ionic salt e.g. Na_{2}SO_{4} with a common ion SO_{4}^{2-} then concentration of SO_{4}^{2-} increases.

But, at a constant temperature, K_{sp} is constant.

Therefore, to keep K_{sp} constant, excess amount of SO_{4}^{2-} will combine with free Ba^{2+} ion in solution and produce BaSO_{4}.

Hence, as a whole, solubility of BaSO_{4} decreases.

3 0
4 years ago
What does the specific heat for a substance indicate
BigorU [14]
Yes this is know as the c value. It is usually used in q=mc change in temperature
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3 years ago
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Combustion reactions typically involve all of the following except
cestrela7 [59]

Answer:

<h2><em><u>b. The production of a Hydrocarbon</u></em></h2>

Explanation:

In Combustion reaction usually occurs when a hydrocarbon reacts with oxygen to produce carbon dioxide and water. 

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Inga [223]
When we say STP that means the system is at its standard temperature and pressure. Both systems is having the same condition hence temperature and pressure is constant. We then set the amount of gas in both cases to be equal. Hence from the ideal gas law, 
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The answer is (2) 2 L of methane gas. 
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