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Paladinen [302]
2 years ago
7

How would one convert 15 seconds to hours?

Chemistry
2 answers:
Tju [1.3M]2 years ago
8 0

Answer:

answer d

Explanation:

kodGreya [7K]2 years ago
5 0

Answer:

A

Explanation:

15 sec   *   1 hr/3600 sec    (note how 'sec'  cancels out and you are left with 'hour' in your answer)   =    15/3600 hour

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What does the number of valence electrons determine?
N76 [4]

Valence electrons are the electrons in the outermost shell of an element on the periodic table. Atoms want to be able to have a full outer shell and they can share or trade electrons in order to achieve this. Valence electrons are also super super important in chemical reactions. The number of valence electrons determines what group that specific atom or element is in on the periodic table. This affects the reactivity of the element.

4 0
3 years ago
The stability of an atom is determined by the: A strength of its gamma rays B ratio of neutrons to protons C number of electrons
Lyrx [107]

Your correct answer is (B) Ratio of neutrons to protons

Hope this helps! :)


6 0
3 years ago
Read 2 more answers
How can we tell when something is polar or non-polar in an Inter-molecular Force?
Montano1993 [528]
If the substance mixes with water it's polar. If it doesn't it ms non polar.
7 0
3 years ago
How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26ÁC? Show all work used to solve this pr
klio [65]
The answer is 7.33 g.

<span>To calculate this, we will use the the ideal gas law:
PV = nRT
where
P - pressure of the gas,
V - volume of the gas,
n - amount of substance of gas,
R - gas constant,
T - temperature of the gas.</span>

Since the amount of substance of gas (n) can be expressed as mass (m) divided by molar mass (M), then:

PV = RTm/M

It is given:

P = 0.98 atm

V = 10.2 l

T = 26°C = 299.15 K 

R = 0.082 l atm/Kmol (gas constant)

M (H2O) = 2Ar(H) + Ar(O) = 2*1 + 16 = 2 + 16 = 18g

m = ?

Since PV = RTm/M, then:

m = PVM/RT

m = 0.98 · 10.2 · 18 / 0.082 · 299.15 = 179.928/24.5303 = 7.33 g

6 0
3 years ago
Number 7 and 8 <br><br><br><br><br><br>Skjsjsjsjskksksksksksksjjsj<br>​
noname [10]

Answer:

B

B

Explanation:

the both have the same thing or something

3 0
3 years ago
Read 2 more answers
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