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4 years ago

Compare the density of the he atom with that of pure water, which is 1.0 g/cm3.

1 answer:

3 0

At room temperature, water is liquid in form. For helium, it is gas because it is the second lightest element in nature. So, you would expect the density of Helium to be much less than 1 g/cm³. Because gas is very light and occupies a lot of space, the density would result to a very small number.

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How old were you when u got your first kiss? if you still haven't gotten it how old are you now?

goldfiish [28.3K]

Answer:

I havent kiss anyone

Explanation:

cuz most men are butts

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3 years ago

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Fill in the missing blanks in the equation below active enzyme

Anni [7]

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3 years ago

How to calculate the pH of NH4OH(0.1M)

anastassius [24]

Answer is: pH of ammonium hydroxide is 11.13.
Chemical reaction of ammonium hydroxide in water: NH₄OH → NH₄⁺ + OH⁻.

Kb(NH₄OH) = 1,8·10⁻⁵.
c₀(NH₄OH) = 0.1 M.
c(NH₄⁺) = c(OH⁻) = x.
c(NH₄OH) = 0.1 M- x.
Kb = c(NH₄⁺) · c(OH⁻) / c(NH₄OH).
0,000018 = x² / 0.1 mol/L - x.

Solve quadratic equation: x = c(OH⁻) = 0.00133 M.

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pH = 11.13.

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3 years ago

4. In a solution of sugar water, sugar is the ______. (SPS6a; DOK2)

Rzqust [24]

Answer:

B. solute

Explanation:

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4 years ago

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A 5.0 L sample of gas at 300. K is heated to 600. K. What will the new volume of the gas be?

Ainat [17]

Answer:

$V_2=10L$

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the required new volume by using the Charles' law as a directly proportional relationship between temperature and volume:

$\frac{V_2}{T_2} =\frac{V_1}{T_1}$

In such a way, we solve for V2 and plug in V1, T1 and T2 to obtain:

$V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{5.0L*600K}{300K}\\\\V_2=10L$

Regards!

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3 years ago