What is the mass in grams of 0.94 moles of sodium bicarbonate. NaHCO3?

Answers

Answer 1

Answer:

Mass of a substance = Moles of a substance × molar mass of a substance

We have 0.94 moles of NaHCO3. The molar mass of NaHCO3 is the sum of the atomic masses of the elements comprising NaHCO3, which is approximately 84.007 g/mol.

The mass of 0.94 moles of sodium bicarbonate is therefore (0.94 moles NaHCO3)(84.007 g NaHCO3/mol NaHCO3) = 78.97 ≈ 79 grams of sodium bicarbonate.

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Identify the chiral carbon in amphetamine (benzedrine)

Answers

Chiral Carbon is a carbon atom that is attached to 4 different types of atoms or group of atoms

In Amphetamine, there is only 1 carbon that have 4 different types of atoms, so there is only 1 Chiral Carbon in it which have 2 optical isomers :

PhCH2CH(NH2)CH3

Hydrogen chloride gas is shipped in a container under 5,100 mmHg of pressure that occupies 20.1 liters at 29°C. How many liters of gas would be produced at STP?

Answers

The number of liters of a gas that would produced at STP is 121.86 Liters

calculation

Step 1 : calculate the moles of hydrogen chloride gas using ideal gas equation

That is PV=nRT where,

P( pressure) = 5100 mm hg

V(volume)= 20.1 L

n(number of moles)= ? moles

R( gas constant) = 62.3636 L.mmhg/mol.K

T( temperature) =29 °C in to kelvin = 29 +273 =302 K

by making n the subject of the formula by diving both side by RT

n= Pv/RT

n=[(5100 mm hg x20.1 L)/(62.3636 l.mmhg/mol.k x 302 K)] =5.44 moles

Step : calculate the liters of a gas at STP

that is at STP

1 moles = 22.4 L

5.44 moles=? L

by cross multiplication

=( 5.44 mole x 22.4 L) / 1 mole =121.86 liters

The formula C2H4 can be described as

Answers

C2H4 is Ethylene. Ethylene is a simple hydrocarbon alkaline.

In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?

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I know what you're asking but I don't think the question is stated properly. Technically, an atom will not join with an "oxide" ion; i.e., the oxide ion is an atom of oxygen to which two electrons have been added. An oxide ion will add to 2 K ions or 1 Ca ion. The K ion has lost just one electron so it takes two of them to equal the 2- charge on the oxide ion whereas the Ca ion has lost two electrons and it takes only one of them to equal the charge on the oxide ion.

How different are the duck leeches offsprings from their parents

Answers

They are different because their appearance and general genology may differ greatly from the leeches parent.

What net ionic equation describes the reaction when these solutions are mixed?Given the equation: Na3PO4 (aq) + CaCl2(aq) →

A. 2PO43–(aq) + Cl– (aq) → Cl2(PO4)3(s)
B. 2Ca2+(aq) + Na+(aq) → NaCa2(s)
C. Na+(aq) + Cl– (aq) → NaCl(s)
D. 2PO43–(aq) + 3Ca2+(aq) → Ca3(PO4)2(s)

Answers

I think the correct answer from the choices listed above is option D. The net ionic equation that will describe the reaction of the reactants when mixed is expressed as:

2PO43–(aq) + 3Ca2+(aq) → Ca3(PO4)2(s)

Hope this answers the question. Have a nice day.

Answer:

$2PO_(4)^(-3) (aq) + 3Ca^(+2)(aq)-->Ca_(3)(PO_(4))_(2)(s)$