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3 years ago

ANSWER d is the corresect answer

Chemistry

1 answer:

loris [4]3 years ago

7 0

Answer:

d is the correct answer

Explanation:

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Answer: 2.6 M

Explanation:

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3 years ago

A student measured out 0.333 moles of theobromine, CyH3N402 (MM = 180.8/mol) the

Verdich [7]

Answer

2.0 x 10²³ molecules.

Explanation

Given:

The number of moles of theobromide measured out = 0.333 moles.

MM of theobromide = 180.8 g/mol

What to find:

The number of molecules of theobromide the student measured.

To go from moles to molecules, multiply the number of moles by Avogadro's number.

The Avogadro's number = 6.02 x 10²³

1 mole of theobromide contains 6.02 x 10²³ molecules.

So, 0.333 moles of theobromide measured out will have (0.333 x 6.02 x 10²³) = 2.0 x 10²³ molecules.

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1 year ago

What is the chemical formula for the compound ammonium phosphate? Use the list of polyatomic ions and the periodic table to help

Talja [164]

Answer: The correct answer is Option C.

Explanation:

We are given some polyatomic ions with their oxidation states. Polyatomic ions are defined as the ions which are formed from more than 2 atoms.

We need to find out the chemical formula for ammonium phosphate.

For this, the polyatomic ions used are:

Ammonium ion - $NH_4^+$

Phosphate ion - $PO_4^{3-}$

By using criss-cross method, the oxidation state of the ions are exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Thus, the chemical formula for this compound is $(NH_4)_3PO_4$

Hence, the correct answer is Option C.

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4 years ago

Read 2 more answers

If a original sample of radioactive uranium-238 had a mass of 400 grams,what is the total amount of the uranium-238 sample that

laila [671]

Since the half-life is 4.5 billion years, two half-lives would have elapsed after 9 billion years.
If you start with 400 g, half decays during the first half-life, leaving 200 g. 
During the second half-life, half of the 200 g decays, leaving 100 g.

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4 years ago