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4 years ago

How many grams of sodium sulfate react with 20.8 of barium chloride?

1 answer:

3 0

Convert mass of BaCl2 to moles:
20.8 g BaCl2 / 208.23 = 0.100 mol
Because BaCl2 and Na2SO4 react in a 1:1 ratio, you will need 0.100 mol Na2SO4
Mass Na2SO4 = 0.100 mol X 142 g/mol = 14.2 g Na2SO4

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All chemical reactions convert one substance into another. select one: a. true. b. false.

seropon [69]

B. false

All reactions have an equilibrium, at which the rate of the reaction rates on each side of the equation are equal to each other. Sometimes that can be one-way, but it’s more often a two-way street. Where you’ll have an amount of products and reactants.

6 0

4 years ago

You want to make 100 mL of a 2.5 M stock solution of calcium chloride (molecular weight 110.98 g/mol). How many grams of calcium

Evgesh-ka [11]

Answer:

27.7 g

Explanation:

100 mL = 0.100 L

To solve this problem we use the definition of molarity:

M = mol / L

From the problem we're given M = 2.5 M and volume = 0.100 L. We use the above formula and calculate the required moles of calcium chloride (CaCl₂):

2.5 M = moles / 0.100 L

moles = 0.25 moles CaCl₂

Finally we use the molecular weight of calcium chloride to calculate the required mass:

0.25 moles CaCl₂ * 110.98 g/mol = 27.745 g CaCl₂

Rounding to the nearest tenth of a gram the answer is 27.7 g.

5 0

3 years ago

Iron fillings sprinkled near a magnet arrange themselves into a pattern that illustrates the

Ipatiy [6.2K]

the force of attraction of iron fillings towards magnet

5 0

3 years ago

Convert the following into balanced equations:

masya89 [10]

Balanced equation :

2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

Organic Nomenclature:

Hexane is a six-carbon straight-chain alkane. The prefix "hex-" signifies the number 6 for alkanes, and the suffix "-ane" is what clarifies that this hydrocarbon has only carbon-carbon single bonds. There are no double or triple bonds.

Elaborating the equation :

The mass of hexane available for this reaction is converted to a quantity of moles by multiplying by its density to get a mass and then dividing by its molar mass. This quantity of moles is then related to the quantity of moles of oxygen by their molar ratios. According to this balanced reaction equation, every 2 moles of hexane burned will require the reaction of 19 moles of oxygen gas.

Learn more about balanced equation :

brainly.com/question/20780772

#SPJ4

5 0

1 year ago

Magnesium metal (0.100 mol) and a volume of aqueous hydrochloric acid that contains 0.500 mol of HCl are combined and react to c

jok3333 [9.3K]

Answer:

2.24 L of hydrogen gas, measured at STP, are produced.

Explanation:

Given, Moles of magnesium metal, $Mg$ = 0.100 mol

Moles of hydrochloric acid, $HCl$ = 0.500 mol

According to the reaction shown below:-

$Mg_{(s)} + 2HCl_{(aq)}\rightarrow MgCl_2_{(aq)} + H_2_{(g)}$

1 mole of Mg reacts with 2 moles of $HCl$

0.100 mol of Mg reacts with 2*0.100 mol of $HCl$

Moles of $HCl$ must react = 0.200 mol

Available moles of $HCl$ = 0.500 moles

Limiting reagent is the one which is present in small amount. Thus, $Mg$ is limiting reagent.

The formation of the product is governed by the limiting reagent. So,

1 mole of $Mg$ on reaction forms 1 mole of $H_2$

0.100 mole of $Mg$ on reaction forms 0.100 mole of $H_2$

Mole of $H_2$ = 0.100 mol

At STP,

Pressure = 1 atm

Temperature = 273.15 K

Volume = ?

Using ideal gas equation as:

$PV=nRT$

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

1 atm × V L = 0.100 × 0.0821 L.atm/K.mol × 273.15 K

⇒V = 2.24 L

2.24 L of hydrogen gas, measured at STP, are produced.

4 0

3 years ago