Question

i need somebody to tell me if i have the correct answers for a hart test i need to pass. Please respond if you can help. Will fan ect.

Answer 1

FYI it is a chemistry test

Answer 2

wat is that

Answer 3

Which statement about the number of protons and neutrons in the atoms of the isotopes of oxygen 16O,17O, 18O is correct?

(Atomic number of oxygen is 8.)

A.
In each of these three isotopes, the number of protons is always 8. The isotopes vary only in the number of neutrons. 16O has 16 neutrons. 17O has 17 neutrons. 18O has 18 neutrons.

B.
In each of these three isotopes, the number of neutrons is always 8. The isotopes vary only in the number of protons. 16O has 8 protons. 17O has 9 protons. 18O has 10 protons.

C.
In each of these three isotopes, the number of protons is always 8. The isotopes vary only in the number of neutrons. 16O has 8 neutrons. 17O has 9 neutrons. 18O has 10 neutrons.

D.
In each of these three isotopes, the number of neutrons is always 8. The isotopes vary only in the number of protons. 16O has 16 protons. 17O has 17 protons. 18O has 18 protons.

Answer 4

@sleppyjess

Answer 5

@sikinder

Answer 6

@nechirwan

Answer 7

A

Answer 8

thank you

Answer 9

can you help with more

Answer 10

if i can ,of curs :D

Answer 11

This reaction involves propane and oxygen in a grill:
C3H8 + 5O2 → 3CO2 + 4H20

What type of reaction is this?

A.
synthesis

B.
decomposition

C.
endothermic

D.
combustion

Answer 12

it is just an arrow

Answer 13

D

Answer 14

thank you

Answer 15

can i ask another

Answer 16

give me a medal
plzzzzz

Answer 17

if you answer one more

Answer 18

Oxygen plays a big role in the purification of iron for the steel industry. Iron oxide (Fe2O3) is combined with carbon monoxide in a blast furnace to produce iron and carbon dioxide gas.

Which is the balanced equation for this reaction?

A.
Fe2O3 + CO → Fe + CO2

B.
Fe2O3 + 3CO → Fe + 3CO2

C.
Fe2O3 + 3CO → 2Fe + 3CO2

D.
Fe2O3 + (CO)3 → (Fe)2 + (CO2)3

Answer 19

C