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Gnoma [55]
3 years ago
6

If the sum of the last

Chemistry
1 answer:
Vikki [24]3 years ago
5 0

Answer:

number must be 0000.999

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Pls help! I’m not very smart so please explain it to me!
Fantom [35]

Answer:

3.01  x 10²¹

Explanation:

Molar mass of h₂o =18.01528 g/mol.

it means 1 mole h₂o=18.01528 g .....(1)

1 mole = 6.022 × 10^23 molecules

so,

1 mole  h₂o =6.022 × 10^23 molecules=18.01528 g  [from 01]

now,

18.01528 g h₂o has= 6.022 × 10^23 molecules

9.00x10⁻² g h₂o has= ( 6.022 × 10^23 x 9.00x10⁻² ) /18.01528 molecules

                                  =3.008 x 10²¹ molecules

                                  ≈ 3.01  x 10²¹ molecules

3 0
3 years ago
Read 2 more answers
An atom is neutral because it has the same number of positively charged protons as<br> it has
Luden [163]
“Electrons” An atom is neutral because it has the same number of positive charges protons as it has electrons.
6 0
4 years ago
Chem please help theres a photo attatched
a_sh-v [17]

Answer:

the top one is 100.000 and bottom one is 100.000

Explanation:

8 0
3 years ago
Read 2 more answers
Which of the following is the test for oxygen has?
dem82 [27]
A or B depends on what you mean by lit or glowing but when you place a wooden split in the sample the gas must reignite but there can be some confusion between hydrogen and oxygen mainly because a splint can cause a slight popping sound while it reignites but hydrogen pops are more violent and can most time extinguish the splint.
5 0
4 years ago
1. Where do convection currents happen? crust inner core core mantle <br> pls help
Vikentia [17]

Answer:

Mantle

Explanation:

Convection currents in the Earth occur in the mantle. The core of the Earth is extremely hot, and material in the mantle close to the core is heated...

Hope that help <3

5 0
3 years ago
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