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2 years ago

What is the mass of 2.50 moles of potassium chlorate (KCIO3) in grams?

Chemistry

2 answers:

gtnhenbr [62]2 years ago

6 0

Answer: 305 g KClO3

Explanation:

2.50 moles KClO3 x 122 g KClO3 / 1 mole KClO3

= 305 g KClO3

Cancel out the units of moles of KClO3 and the remaining unit is in grams of KClO3

hichkok12 [17]2 years ago

3 0

Answer:

How many moles KClO3 in 1 grams? The answer is 0.0081599680129254.

We assume you are converting between moles KClO3 and gram.

You can view more details on each measurement unit:

molecular weight of KClO3 or grams

This compound is also known as Potassium Chlorate.

The SI base unit for amount of substance is the mole.

1 mole is equal to 1 moles KClO3, or 122.5495 grams.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between moles KClO3 and gram.

Type in your own numbers in the form to convert the units!

Explanation:

Hope this helps you :)

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Choose the correct description for each of the

Aliun [14]

Answer:

Density: Physical Property

Flammability: Chemical Property

Solubility In Water: Physical Property

Reactivity With Water: Chemical Property

Melting Pot: Physical Property

Color: Physical Property

Odor: Physical Property

Explanation:

7 0

2 years ago

Read 2 more answers

Consider the reaction H2(g) + Cl2(g) → 2HCl(g)ΔH = −184.6 kJ / mol If 2.00 moles of H2 react with 2.00 moles of Cl2 to form HCl,

zalisa [80]

Answer:

ΔU=-369.2 kJ/mol.

Explanation:

We start from the equation:

Δ(H)=ΔU+Δ(PV), which is an extension of the well known relation: H=U+PV.

If Δ(PV) were calculated by ideal gas law,

PV=nRT

Δ(PV)=RTΔn.

Where Δn is the change of moles due to the reaction; but, this reaction does not give a moles change (Four moles of HCl produced from 4 moles of reactants), so Δ(PV)=0.

So, for this case, ΔH=ΔU.

The enthalpy of reaction given is for one mole of reactant, so the enthalpy of reaction for the reaction of interest must be multiplied by two:

$2 reactant moles*\frac{-184.6kJ}{mol}$

ΔU=-369.2 kJ/mol.

4 0

2 years ago

Three mixtures were prepared from three very narrow molar mass distribution polystyrene samples with molar masses of 10,000, 30,

8_murik_8 [283]

Answer:

(a). 46,666.7 g/mol; 78,571.4 g/mol

(b). 86950g/mol; 46,666.7 g/mol.

(c). 86950g/mol; 43,333.33 g/mol

Explanation:

So, we are given the molar masses for the three samples as: 10,000, 30,000 and 100,000 g mol−1.

Thus, the equal number of molecule in each sample = ( 10,000 + 30,000 + 100,000 ) / 3 = 46,666.7 g/mol.

The average molar mass = [ ( 10,000)^2 + (30,000)^2 + 100,000)^2] ÷ 10,000 + 30,000 + 100,000 = 78,571. 4 g/mol.

(b). The equal masses of each sample = 3/[ ( 1/ 10,000) + (1/30,000 ) + (1/100,000) ] = 20930.23 g/mol.

Average molar mass = ( 10,000 + 30,000 + 100,000 ) / 3 = 46,666.7 g/mol.

(c). Equal masses of the two samples = (0.145 × 10,000) + (0.855 × 100,000)/ 0.145 + 0.855 = 86950g/mol.

The weight average molar mass = 1.7 + 10,000 + 100,000/ 1.7 + 1 = 43,333.33 g/mol.

6 0

2 years ago

The gas in a sealed container has an absolute pressure of 125.4 kilopascals. If the air around the container is at a pressure of

AlexFokin [52]

Answer: C. 25.6 kPa

Explanation:

The Gauge pressure is defined as the amount of pressure in a fluid that exceeds the amount of pressure in the atmosphere.

As such, the formula will be,

PG = PT – PA

Where,

PG is Gauge Pressure

PT is Absolute Pressure

PA is Atmospheric Pressure

Inputted in the formula,

PG = 125.4 - 99.8

PG = 25.6 kPa

The gauge pressure inside the container is 25.6kPa which is option C.

4 0

2 years ago

4. A sample of silicon contains<br> 5.23 x 1011 atoms. Write this amount<br> as a whole number.

Marat540 [252]

The answer is 523000000000

8 0

2 years ago