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Kryger [21]
2 years ago
12

Which element is non-metallic and a gas at room temperature?

Chemistry
2 answers:
ANEK [815]2 years ago
7 0

Answer:

Notrogen(N)

Explanation:

Plz mark me as brilliant

muminat2 years ago
7 0
Nitrogen is the only one that is non-metallic and a gas at room temperature.
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Calculate the moles and grams of solute in each solution. D. 2.0 L of 0.30M Na2SO4. I already have A, B, and C. Thanks!
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Find the number of moles
C = n / V
C(Concentration) = 0.30 moles / L
V ( Volume) = 2 L
n = ??
n = C * V
n = 0.30 mol / L * 2 L
n = 0.60 mol


Find the molar mass
2Na = 23 * 2 = 46 grams
1S   = 32 * 1 = 32 grams
O4   = 16 * 4 = 64 grams
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Find the mass
n = given mass / molar mass
n = 0.06 mol
molar Mass = 142 grams / mol
given mass = ???

given mass = molar mass * mols
given mass = 142 * 0.6
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85.2 are in a 2 L solution that has a concentration of 0.6 mol/L


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A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?
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6832 J of heat energy is applied to 5.9 mol of water. If the original temperature of the water was 18.60C, the final temperature
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Answer: The final temperature of the water will be 34.0^0C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

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m= mass of water = 5.9mol\times 18g/mol=106.2g

c = specific heat capacity = 4.184J/g^0C

Initial temperature of the water = T_i = 18.6^0C

Final temperature of the water = T_f  = ?

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The final temperature of the water will be 34.0^0C

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