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Anni [7]
3 years ago
6

I need help with question 39 please

Chemistry
1 answer:
Naddik [55]3 years ago
8 0

Answer:

ii

Explanation:

ii

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Select the answer which shows the correct order, slowest to fastest, of the relative rate of diffusion of the gases.
Eddi Din [679]
The heavier the gas is, the slower the gas will diffuse.  the correct order is Kr, Ar, Ne, N based off of the atomic weight.  However I don't think N is a gas.  Nitrogen is diatomic so it should be N₂.

I hope this helps. 
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3 years ago
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What is the hydronium (H3O+) concentration of a solution with a pH of 3.60? A. 2.5 × 10-4 M B. 3.0 × 10-4 M C. 4.0 × 10-11 M D.
butalik [34]

The H3O+  concentration  of the solution with  a PH  of 3.60  is  2.5  x10^-4 M (answer  A)


   <u><em>explanation</em></u>

PH is calculated  using PH = - log  [ H3O+]  formula


Therefore  - log [H3O+]  = 3.60

To calculate  the concentration of h3O+  ,find the  antilog  of 3.60

Since  -log is at base of 10, the antilog  of 3.60  = 10^-3.60  = 2.5 x10^-4M

7 0
3 years ago
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Whay happens regularly in fission reaction
lorasvet [3.4K]

Answer:

In nuclear fission, an unstable atom splits into two or more smaller pieces that are more stable, and releases energy in the process. The fission process also releases extra neutrons, which can then split additional atoms, resulting in a chain reaction that releases a lot of energy.

Explanation:

4 0
3 years ago
Which reaction below represents the second ionization of sr?
PIT_PIT [208]
<span>e.sr⁺(g) → sr2⁺(g) + e⁻
When remove first electron became Sr</span>⁺, second Sr²⁺.
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4 years ago
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Some water released 7800 J of energy when cooled from 78°C to 33°C. What was the mass of the water?
Karo-lina-s [1.5K]

Answer:

-41. 47

Explanation:

m = q / Cp x T

m = Mass

q = Energy (or joules)

Cp = Heat Capacity

T = Change in Temperature

Water's heat capacity is always 4.18.

This is the formula you'll need for change in temperature:

Final - Initial

So, 33 - 78 = -45

m = 7800 / 4.18 x -45

= -41.47

4 0
2 years ago
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