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2 years ago

How many moles of xenon gas are necessary to exert a 0.64atm pressure in an 8.5L container at 300.0K?

Chemistry

2 answers:

navik [9.2K]2 years ago

5 0

0.026 moles is the right answer.

Sindrei [870]2 years ago

3 0

Answer:

0.026 moles

Explanation:

You might be interested in

A) What is the maximum number of grams of nickel bromide that can be produced from the reaction of 67.8 g of nickel with 37.3 g

svetoff [14.1K]

Answer:

The answer to your question is a) 51.07 g of NiBr₂ b) Nickel, 54 g

Explanation:

Data

mass of NiBr₂ = ?

mass if Ni = 67.8 g

mass of Br = 37.3 g

Balanced chemical reaction

Ni + Br₂ ⇒ NiBr₂

Process

1.- Find the atomic mass of the reactants and the molar mass of the product

Ni = 59 g

Br = 79.9 x 2 = 159.8 g

NiBr₂ = 59 + 159.8 = 218.8 g

2.- Find the limiting reactant

theoretical yield Ni/Br₂ = 59/159.8 = 0.369

experimental yield Ni/Br₂ = 67.8/37.3 = 1.81

The limiting reactant is Bromine because the experimental yield was lower than the theoretical yield.

3.- Calculate the mass of NiBr₂

159.8 g of Br₂ --------------- 218.8 g of NiBr₂

37.3 g of Br₂ -------------- x

x = (37.3 x 218.8) / 159.8

x = 8161.24/159.8

x = 51.07 g of NiBr₂

4.- Find the excess reactant

The excess reactant is Nickel

59 g of Ni ---------------- 159.8 g of Br₂

x ---------------- 37.3 g of Br₂

x = (37.3 x 59)/159.8

x = 2200.7/159.8

x = 13.77 g of Ni

Excess Ni = 67.8 - 13.77

= 54 g

5 0

3 years ago

Facial dimples in man are dominatant over no dimples. Show

Nat2105 [25]

I'm assuming false but really have no clue

3 0

2 years ago

Ethanol (c2h5oh) melts at -114Â°c. the enthalpy of fusion is 5.02 kj/mol. the specific heats of solid and liquid ethanol are 0.9

Nimfa-mama [501]

Answer: 4.18925 kJ heat is needed to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

Explanation:

Temperature of Solid $C_2H_5OH=-135^oC=138 K(0^oC=273K)$

Melting temperature of Solid $C_2H_5OH=114^oC=159 K$

Temperature of liquid $C_2H_5OH=-50^oC=223K$

Specific heats of solid ethanol = 0.97 J/gK

Specific heats of liquid ethanol = 2.3 J/gK

Heat required to melt the the 25 g solid $C_2H_5OH$ at 159 K

$\Delta T_1$ = 159 K - 138 K = 21 K

$Q_1=mc\Delta T= 25\times 0.97J/gK\times 21 K=509.25 J$

Heat required to melt and raise the temperature of $C_2H_5OH$ upto 223 K

$\Delta T_2$ = 223 K - 159 K = 64 K

$Q_2=mc\Delta T= 25\times 2.3J/gK\times 64 K=3680 J$

Total heat to convert solid ethanol to liquid ethanol at given temperature :

$Q_1+Q_2=509.25 J+3680 J=4189.25 J=4.18925 kJ$ (1kJ=1000J)

Hence, 4.18925 kJ of heat will be required to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

6 0

2 years ago

What is name of first man made element?

enot [183]

The first element discovered through synthesis was technetium<span>—its discovery being definitely confirmed in 1936. Hope that helps.</span>

7 0

2 years ago

Read 2 more answers

A bowling ball, a baseball, a tennis ball, and a ping-pong ball are all dropped from a height of 2 meters. Which has the most ki

mr_godi [17]

Answer:

they all have the same amount of kinetic energy

6 0

2 years ago