Calculate the molarity of a solution consisting of 60.0 g of NaOH in 1.50 L of solution.

When 45.8 g of K2CO3 react with excess HCI, 46.3 g of KCl are formed. Calculate the theoretical and % yields of

Talja [164]

Answer:

Theoretical yield = 49.45g

Percentage yield= 93.6%

7 0

2 years ago

There are several hazards associated with the chemicals in the qualitative analysis experiment. for each chemical, identify the

Ilia_Sergeevich [38]

You can determine the hazards of these chemicals by looking at their material data safety sheets (MSDS).

1. 0.1 M Ag⁺: Silver compounds are absorbed by skin causing bluish pigmentation. Thus, it causes staining on skin. Also, liquid vapor may be irritating to skin and also moderately toxic when ingested.

2. 0.1 M Ba²⁺: This is mildly toxic when ingested causing stomach irritation, muscle weakness, swelling of organs like brain, liver, kidney and heart.

3. 0.1 M Fe³⁺:Iron is corrosive, has irritating vapor especially to the eyes, and toxic if ingested.

4. 6 M HCl: This is a concentrated strong acid, so it is corrosive, has irritating vapors, flammable and toxic when ingested.

5. 6 M H₂SO₄: This is also a concentrated strong acid. Moreover, it is a strong oxidizing agent. So, its hazards include: corrosive, has irritating vapors, toxic when ingested and causes staining on skin.

6. 6 M HNO₃: This is a concentrated strong acid, so it is corrosive, has irritating vapors, flammable and toxic when ingested.

7. 7.5 M NH₃: This is a weak base. It is characterized for its pungent odor. This is corrosive, has irritating vapors, toxic if ingested, and flammable.

7 0

2 years ago

A materials scientist has created an alloy containing aluminum, copper, and zinc, and wants to determine the percent composition

liubo4ka [24]

Answer:

0.8749 grams of hydrogen gas was formed from the reaction.

Explanation:

P = Pressure of hydrogen gad= 744 Torr = 0.98 atm

(1 atm = 760 Torr)

V = Volume of hydrogen gas= 11 L

n = number of moles of hydrogen gas= ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of vapor = 27.0 °C = 300.15 K

Putting values in above equation, we get:

Using an ideal gas equation:

$PV=nRT$

$n=\frac{PV}{RT}=\frac{0.98 atm\times 11 L}{0.0821 L atm/mol K\times 300.15 K}$

n = 0.4374 moles

Mass of 0.4374 moles of hydrogen gas:

0.4374 mol × 2 g/mol = 0.8749 g

0.8749 grams of hydrogen gas was formed from the reaction.

7 0

2 years ago

What are more than 5 abiotic things in the desert?

Anna71 [15]

Abiotic things are like rocks...dirt...water vs. biotic is living things or something that was living

7 0

2 years ago

Read 2 more answers

What is the chemical formula for sodium sulfate?

yan [13]

Hello!

When finding the chemical formula of a compound, we will need to find the charges of each element/bond.

Looking at our period table, sodium has a +1 charge, written as Na 1+, and sulfate has a charge of -2, and it is written as SO4 2-.

Now, we need to make the charges equivalent. To do this, we need to "criss-cross" the charges. This means that sodium will need to additional atoms to make the charges equal, and sulfate will need one.

Therefore, the chemical formula for sodium sulfate is: Na2SO4.

5 0

2 years ago