Potassium hydrogen carbonate

1. For dry air at 1.0000 atm pressure, the densities at –50°C, 0°C, and 69°C are 1.5826 g dm–3 , 1.2929 g dm–3, and 1.0322 g dm–

pshichka [43]

Answer :

(a) The value of volume of air at temperature $-50^oC,0^oC\text{ and }69^oC$ are $631.87dm^3,773.46dm^3\text{ and }968.80dm^3$ respectively.

Explanation :

(a) The formula used for density is:

$Density=\frac{Mass}{Volume}$

or,

$Volume=\frac{Mass}{Density}$

Now we have to calculate the volume at each temperature.

The mass of sample = 1000 g

At temperature $-50^oC$ :

Density = $1.5826g/dm^3$

$Volume=\frac{1000g}{1.5826g/dm^3}=631.87dm^3$

At temperature $0^oC$ :

Density = $1.2929g/dm^3$

$Volume=\frac{1000g}{1.2929g/dm^3}=773.46dm^3$

At temperature $69^oC$ :

Density = $1.0322g/dm^3$

$Volume=\frac{1000g}{1.0322g/dm^3}=968.80dm^3$

8 0

3 years ago

What is the [h3o+] in a solution with a poh = 5.20?

Pepsi [2]

POH scale is used to measure how alkaline a solution is
pOH can be calculated as follows
pOH = - log [OH⁻]
pOH is 5.20 and using this the pH can be calculated
pOH + pH = 14
pH = 14 - pOH
pH = 14 - 5.20 = 8.80
pH scale is used to measure how acidic a solution is
pH = -log [H₃O⁺]
[H₃O⁺] = antilog (-8.80)
[H₃O⁺] = 1.6 x 10⁻⁹ M
answer is [H₃O⁺] = 1.6 x 10⁻⁹ M

7 0

3 years ago

The composition of a compound is 20.01% carbon and 79.99% oxygen by mass. what is its empirical formula?

Anni [7]

Assume there are 100g of the compound.
Mass of carbon:20.01g
Mass of oxygen:79.99g
Number of mole of carbon:20.01/12=1.6675mol
Number of mole of oxygen:79.99/32=2.4996875mol
Mole ratio between carbon and oxygen:
1.6675/1.6675:2.4996875/1.6675
=1:1.499062969
1x2:1.499062969x2
=2:2.998125937
≈2:3
Hence, the empirical formula:
C2O3

5 0

3 years ago

15 POINTS TO BEST ANSWERRRR

belka [17]

D.zinc because of mass

4 0

3 years ago

Ice has a density of 0.92g/cm3. It will float in water.

SVEN [57.7K]

The density of pure water is 1 g/cm^3.

Its density is 0.98 g cm 3 at room temperature, in comparison with the handiest zero.92 g cm 3 for ice, a reality that has to be defined through atomic, and molecular concepts. If ice has been no longer much less dense than water, it might sink, having a devastating impact on lake backside ecosystems. believe it or now not, ice is honestly about 9% much less dense than water. for the reason that water is heavier, it displaces the lighter ice, causing the ice to glide to the pinnacle.

The density of ice is about 90 percent that of water, but that could range because ice can contain air, too. meaning that about 10 percent of an ice cube or iceberg will be above the water line. The density of water is maximum at four∘C, and the density of the ice is much less than the water due to its susceptible intermolecular pressure of attraction. as the density of water is more, it's miles heavier than ice. therefore ice floats on the floor of the water. Ice continually floats due to the fact it's far less dense than everyday water. because frozen water molecules shape a crystal.

Learn more about A density here:-brainly.com/question/17780219

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6 0

1 year ago