All categories

2 years ago

▸ Exam Instructions

Chemistry

1 answer:

neonofarm [45]2 years ago

7 0

C. They’re safe to use without the regulation of a physician, according to a regulatory agency

You might be interested in

How many neutrons are there in 9 molecules of P4 with mass number 31 and proton number 15?

aalyn [17]

A = mass number which is equal to the total number of protons + number of neutrons, Z= atomic number of any element which is also indicates Number of protons or number of electron in the given atom.

The formula to calculate neutron would be :

mass number - proton

31 - 15 = 16

Thus 16 neutrons are found in one atom of P

There are 4 atom in one molecule

Thus

4 atom /1 molecule * 9 molecule * 16 neutron / 1 atom

= 4*9*16= 576 neutrons

7 0

3 years ago

Read 2 more answers

Choose all of the following mole ratios that are correct for the reaction given below. Be sure to choose all that apply.

Dennis_Churaev [7]

Answer:

2 moles NH3 = 1 mole of N2

3 moles of H2 = 1 mole of N2

3 moles of H2 = 2 moles of NH3

Explanation:

The balanced equation for the reaction is given below:

N2 + 3H2 —> 2NH3

From the balanced equation above,

1 mole of N2 reacted with 3 moles of H2 to produce 2 moles of NH3.

Thus, we can say that:

1 mole of N2 = 3 moles of H2

1 mole of N2 = 2 moles of NH3

3 moles of H2 = 2 moles of NH3

Thus, considering the options given above, the right answers to the question are:

2 moles NH3 = 1 mole of N2

3 moles of H2 = 1 mole of N2

3 moles of H2 = 2 moles of NH3

5 0

3 years ago

Read 2 more answers

James decided to do an experiment with a can of soda. He opened a 340 g can of soda and left it open for a day. The next day, he

amm1812

Answer:

A - The can was open and gases were released.

8 0

3 years ago

What is the oxidation state of each element in the species Mn(ClO4)3?

gayaneshka [121]

The oxidation state of the compound Mn (ClO4)3 is to be determined in this problem. For oxygen, the charge is 2-, the total considering its number of atoms is -24. Mn has a charge of +3. TO compute for Mn, we must achieve zero charge overall hence 3+3x-24=0 where x is the Cl charge. Cl charge, x is +7.

7 0

3 years ago

Read 2 more answers

Which of the following statements about alkenes is not correct?

professor190 [17]

<span>Option-C: They react mainly by substitution.

Explanation:
Alkene doesn't give substitution reactions because they are non polar in nature. The double bond in alkene is responsible for Electrophillic Addition reactions as it electron rich and nucleophilic in nature. Reaction of Alkene is given below,</span>

8 0

3 years ago