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zhuklara [117]
3 years ago
11

Which element is found in nature only in compounds? A. sodium B. helium C. oxygen D. nitrogen

Chemistry
2 answers:
ozzi3 years ago
7 0
The element found in nature only in compounds is Sodium
Hoochie [10]3 years ago
7 0

Answer: Option (A) is the correct answer.

Explanation:

A compound is a substance which contains two or more different atoms combined together.

Sodium is found as sodium chloride in nature. Sodium chloride is also known as common salt.

As it contains a sodium atom combined to a chlorine atom, therefore, it is a compound.

Thus, we can conclude that sodium is the element that is found in nature only in compounds.

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Is AgNO3 soluble or insoluble in water?
gtnhenbr [62]

Answer:

Silver Nitrate is very soluble in water.

5 0
2 years ago
How many moles are equal to 89.23g of calcium oxide, CaO?
Katen [24]

1.59moles

Explanation:

Mass  of CaO = 89.23g

Unknown

Number of moles = ?

Solution:

The mole is a unit of measurement in chemistry used to delineate the number of particles an atom contains.

A mole of a substance contains the avogadro's number of particles.

Number of moles = \frac{mass}{molar mass}

Molar mass of CaO = 40 + 16 = 56g/mol

  Number of moles = \frac{89.23}{56} = 1.59moles

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

8 0
2 years ago
Iron fluoride (FeF2) dissociates according to the following equation:
melomori [17]

Answer:

S = 0.788 g/L

Explanation:

The solubility product (Kps) is an equilibrium solubization constant, which can be calculated by the equation:

Kps = \frac{[product]^x}{[reagent]^y}

Where x and y are the stoichiometric coefficients of the product and the reagent, respectively. Because of the aggregation form, the concentration of solids is always equal to 1 for use in this equation.

Analyzing the equation, we see that for 1 mol of Fe^{+2} is necessary 2 mols of F^-, so if we call "x" the molar concentration of Fe^2, for F^- we will have 2x, so:

Kps = [Fe^{+2}].[F^-]^2\\\\2.36x10^{-6} = x(2x)^2\\\\2.36x10^{-6} = 4x^3\\\\x^3 = 5.9x10^{-7}\\\\x = \sqrt[3]{5.9x10^{-7}} \\\\x = 8.4x10^{-3} mol/L

So, to calculate the solubility (S) of FeF2, which is in g/L, we multiply this concentration by the molar mass of FeF2, which is:

Fe = 55.8 g/mol

F = 19 g/mol

FeF2 = Fe + 2xF = 55.8 + 2x19 = 93.8 g/mol

So,

[tex]S = 8.4x10^{-3}x93.8

S = 0.788 g/L

4 0
3 years ago
Which measure is equivalent to work/distance
Bad White [126]
The amount of force is what this is for
8 0
3 years ago
Read 2 more answers
During diffusion which way do the substances move?
ser-zykov [4K]
During diffusion substances move from the denser medium (meaning where there is more of the substance) to less dense medium (meaning where there is less of the substance).


3 0
3 years ago
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