Pls help me with my work!! PLEASEEEE

Chemistry

1 answer:

Eddi Din [679]3 years ago

5 0

Answer:

a c b a d a

Explanation:

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What mass of sodium chloride contains 4.59 x 10 24 formula units?

shtirl [24]

The term formula units means molecules.

Then, what you are looking for is the mass in 4.59*10^24 molecules.

The procedure involves to convert the 4.59 * 10^24 molecules into moles and use the molar mass of the sodium chloride.

1) Number of moles = 4.59 * 10^24 molecules / (6.02 * 10^23 molecules/mol) = 7.62 mol

2) Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol

3) mass of NaCl = molar mass * number of moles = 58.44 g/mol * 7.62 mol = 445.31 g of NaCl

Answer: 445.31 g of NaCl.

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3 years ago

Please I need help!!! I’m torn between A, B and D!!! APEX

kondaur [170]

Explanation:

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3 years ago

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What is the chemical formula of palladium (iv)sulfate

Margarita [4]

<u>Answer: </u>The chemical formula for Palladium(IV) sulfate is $Pd(SO_4)_2$

<u>Explanation:</u>

Palladium is the 46th element of the periodic table which has an oxidation state of +4 (because it is a metal and will form positive ion) and sulfate is the polyatomic ion having a charge of -2 with formula $(SO_4^{2-})$

So, to write the formula of the compound, we do criss cross method in which oxidation state of each element or ion is given to the other combining atom which results into the formation of a neutral compound.

The chemical formula of the compound is $Pd(SO_4)_2$

The image is given below.