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4 years ago

How many CO2 molecules are present in 12.47 L CO2

1 answer:

5 0

Take the given 12.47L then divide that by 22.4L then multiply it by 1 mole of CO2 then divide by 1 mole of CO2 then multiply by 6.02x10^23. Giving you an answer of 3.35^23 molecules of CO2

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In the formation of potassium chloride, the product, KCl, has less energy than the reactants, K and Cl2. This reaction is .

k0ka [10]

if the product has lesser energy than the reactants it means enthalpy change value is positive.so it is endothermic reaction where the heat is absorbed.so kcl will formation will have positive enthalpy change .

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3 years ago

What four elements did the ancient greeks think the world was made of ?

Nezavi [6.7K]

The ancient greeks thought that the earth was composed of earth, water, fire, and air.

Hope this helps you!

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3 years ago

Read 2 more answers

How can you prevent frequent landslides from heavy rains

GrogVix [38]

Answer: make a drainage system or make sure that the ground does not absorb the water from the rain and cause a landslide.

Explanation: To prevent frequent landlides you have to make suee there is and area for the rain to go so it does not get stuck in the mud and destabalize the mud

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3 years ago

The first part of this experiment involved the calibration of the equipment you will use to measure the rate of oxygen evolution

kirza4 [7]

Answer:

Explanation:

(3 pts) A 5.00 gram sample of an oxide of lead PbxOy contains 4.33 g of lead. Determine the

simplest formula for the compound.

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3 years ago

The empirical formula of pyrogallol is C2H2O. Its molar mass is 126 g mol-1. What is the molecular formula?C4H4O2C2H6O3C6H6O3C2H

VARVARA [1.3K]

Answer:

The molecular formula of pyrogallol is: C6H6O3

Explanation:

Step 1: Data given

Empirical formula of pyrogallol is C2H2O

Molar mass of pyrogallol = 126 g/mol

Molar mass of Carbon (C) = 12 g/mol

Molar mass of hydrogen (H) = 1.01 g/mol

Molar mass of oxygen (O) = 16 g/mol

Step 2: Calculate molar mass of the empirical formula

2*12 + 2*1+ 16 = 42 g/mol

Step 3: Calculate the molecular formula

To find the molecular formule , we should multiply the empirical formula by n

n can be found by dividing molar mass of pyrogallol by the molar mass of the empirical formula

n = 126 g/mol / 42 g/mol ≈ 3

We should mulitply the empirica lformula by 3

3*(C2H2O) gives C6H6O3

if we calculate the molar mass now:

6*12 +6*1 + 3*16 = 126 g/mol

The molecular formula of pyrogallol is: C6H6O3

6 0

3 years ago