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iogann1982 [59]
3 years ago
15

Which element is a liquid at STP? 1.bromine 2.cesium 3.francium 4.iodine

Chemistry
1 answer:
nexus9112 [7]3 years ago
4 0
Bromine. both Bromine and Mercury are both a liquid at STP. :)
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Help I don’t know what the answer is
irina [24]

Answer:-

10.0

Explanation: -

The equation is

N2O4 = 2NO2.

Concentration of NO2 = [NO2} = 0.500 M

Concentration of N2O4 = [N2O4] = 0.0250 M

Keq is the equilibrium constant.

It is the ratio of the concentration of products raised to the stoichiometric coefficient of the product to the concentration of the reactants raised to the stoichiometric coefficient of the reactants.

The expression for Keq = [NO2] ^2 / [N2O4]

= 0.500^2 / 0.0250

= 10.0

6 0
3 years ago
If a liquid spontaneously turns into a gas below the critical temperature, it has evaporated.
VMariaS [17]
False because if the water goes below critical temp it would be frozen
3 0
3 years ago
Read 2 more answers
A solution is 5.00% potassium chloride by mass. How much potassium chloride would you expect to collect by evaporating 150.0 g o
stepan [7]

Answer:

C. 7.50g

Explanation:

The percent (%) by mass of a solute in a solution refers to the number of grams contained in 100g of solution by that solute. In this case, 5% by mass of pottasium chloride (KCl) means 5g of KCl is contained in 100g of solution.

Therefore, in 150g of solution, there would be:

5g/100g × 150g

= 0.05 × 150

= 7.50g of KCl solute.

Hence, 7.50g of pottasium chloride would be expected to be collected by evaporating 150.0 g of the solution.

8 0
3 years ago
A chemist weighed out 49.0 g of calcium. Calculate the number of moles of calcium she weighed out. Be sure your answer has the c
fgiga [73]

Answer:

1.22 mol Ca

Explanation:

Molar mass (Ca)=40.1 g/mol

49.0 g* 1 mol/40.1 g ≈ 1.22 mol Ca

7 0
3 years ago
Why might it be unwise to drink water straight from a pond
arsen [322]

Answer:

it is because of the bacteria and different things that go into waters such as ponds, rivers, lakes, seas, oceans, streams, and other body of waters and I should also add the chemicals that go into them as well

Explanation:

5 0
2 years ago
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