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3 years ago

14

Is there any way to memorize the periodic table of elements in one night with the ionic charges and atomic mass, because if not

I'm going to fail this test. This isn't such of a question, I just need some tips or encouraging word.

1 answer:

kirill [66]3 years ago

7 0

Answer:

Maybe try to memorize it by the valence electrons. You can do this!!

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Why doesn't a convection cell form when the burner is turned off?

kati45 [8]

No convection cells are formed when the burner is off because there is no heat to make convection cells and you need heat in order to produce convection cells.

7 0

3 years ago

Force = 2.32 N<br> Acceleration = 0.19 m/s2<br> Mass= ?

pochemuha

m=f/a, so m=2.32/.19

4 0

4 years ago

Determine whether each of the following statements about the thermodynamic functions are True or False as they apply to chemical

ANEK [815]

Answer:

t, t, f, t, f, f

Explanation:

t- true

f- false

4 0

3 years ago

I am using all my points to ask this. please help

ELEN [110]

Answer:

C5H7N

C10H14N2

Explanation:

ok so lets lay out this nicely

elements C H N

percentage 74 8.7 17.3

mass number 12 1 14

divided percentage by mass 6.167 8.7 1.2357

now divide the smallest number with the 4.99 7.04 1

rest for instance 1,237 is the smallest.

so 6.167÷1,237

and 8.7 ÷1.237

and 1,237 divide 1.237

now the ratio is C5H7N

now for molecular formula find Mr of C5H7N which is (12×5)+7+14=81

next divide 162.1÷81=2

so now for molecular formula just multipily everythng by 2

C10H14N2

5 0

3 years ago

Does somebody know the answer ?

Alex777 [14]

H2O is the missing reactant.

Just a caveat: this equation isn’t balanced.

3 0

3 years ago