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2 years ago

What is the volume, in liters, of 1.50 mol Cl, at STP?

1 answer:

4 0

STP signifies standard temperature and pressure. These conditions are at 1 atmospheric pressure and 0 degrees Celsus, It has been said that at these conditions, one mole of a gas molecule is 22.4 liters of volume.

1.50 mol Cl2( 22.4 L / mol) = 33.6 L Cl2

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What is the smallest chemical element?

mario62 [17]

The smallest particle of such an element is an atom, which consists of electrons centered around a nucleus of protons and neutrons.

8 0

4 years ago

When magnesium burns in air, it combines with oxygen to form magnesium oxide according to the following equation. What mass in g

Kisachek [45]

Answer: The given quantity is 2 moles of magnesium or 48 g of magnesium.

The unknown quantity is mass of MgO in grams.

Molar mass of MgO = 40 g

Explanation: $2Mg+O_2\rightarrow 2MgO$

As can be seen from the chemical equation, 2 moles of magnesium react with 1 mole of oxygen gas to give 2 moles of MgO.

According to mole concept, 1 mole of every substance weighs equal to its molar mass.

Thus $2\times 24= 48 g$ of magnesium produce= $2\times 40= 80 g$ of MgO.

Molar mass is the mass in grams of 1 mole of the substance.

Thus if 2 moles of MgO weigh= 80 g

1 mole of MgO will weigh= $\frac{80}{2}\times 1 =40g$

Thus molar mass of MgO is 40 g.

6 0

3 years ago

H2CO3(aq) + H200 H30 (aq) + HCO3 (aq).

timofeeve [1]

Answer:

$K_a=\frac{[H_3O^+][HCO_3^-]}{[H_2CO_3]}$

Explanation:

Several rules should be followed to write any equilibrium expression properly. In the context of this problem, we're dealing with an aqueous equilibrium:

an equilibrium constant is, first of all, a fraction;
in the numerator of the fraction, we have a product of the concentrations of our products (right-hand side of the equation);
in the denominator of the fraction, we have a product of the concentrations of our reactants (left-hand side o the equation);
each concentration should be raised to the power of the coefficient in the balanced chemical equation;
only aqueous species and gases are included in the equilibrium constant, solids and liquids are omitted.

Following the guidelines, we will omit liquid water and we will include all the other species in the constant. Each coefficient in the balanced equation is '1', so no powers required. Multiply the concentrations of the two products and divide by the concentration of carbonic acid:

$K_a=\frac{[H_3O^+][HCO_3^-]}{[H_2CO_3]}$

4 0

4 years ago

According to our textbook, write the formula for the anhydrous compound that was part of the mixture called natron that was used

bearhunter [10]

Answer:

The formula for the anhydrous compound that was part of the mixture called natron that was used by the Egyptians is Na2(CO3)10(H2O).

They use this compound for medicine, cookery, agriculture, in glass-making and to dehydrate egyptian mummies.

Compound of sodium carbonate and sodium bicarbonate was the name of the resulting hydrate that formed.

8 0

3 years ago

Balance the following equation: * 1, 1, 1 1, 3, 1 2, 3, 2 1, 3, 2

alexira [117]

1,3,2

The coefficient multiplied by the subscript will give you how many atoms of the element there are.

So, if we plug in 1,3,2
There will be 2 Nitrogen and 6 Hydrogen in the reactants side of the equation. To balance this on the other side, we must put a 2 in order to get 2 Nitrogen and 6 Hydrogen again.

6 0

3 years ago