HELP HELP HELP PLSSS

Please help me this is my fourth attempt.

Vaselesa [24]

Explanation:

CH4 + 4S ---> CS2 + 2H2S

4) 0.75 mol S × (1 mol CS2/4 mol S) = 0.19 mol CS2

5) 3 mol H2S × (1 mol CH4/2 mol H2S) = 1.5 mol CH4

Fe2O3 + 2Al ---> 2Fe + Al2O3

6) 25 g FeO3 × (1 mol Fe2O3/159.69 g Fe2O3) = 0.16 mol Fe2O3

0.16 mol Fe2O3 × (2 mol Al/1 mol Fe2O3) = 0.32 mol Al

0.32 mol Al × (26.98 g Al/1 mol Al) = 8.6 g Al

7) Given:

45 g Al × (1 mol Al/26.98 g Al) = 1.6 mol Al

85 g Fe2O3 ×(1 mol Fe2O3/159.69 g Fe2O3)

= 0.53 mol Fe2O3

Let's look at how much Fe each reactant will produce:

1.6 mol Al × (2 mol Fe/2 mol Al) = 1.6 mol Fe

0.53 mol Fe2O3 × (2 mol Fe/1 mol Fe2O3) = 1.1 mol Fe

Note that the given amount of Fe2O3 will give us fewer Fe. Therefore, Fe2O3 is the limiting reactant.

8) Al will produce 1.6 mol Fe × (55.845 g Fe/1 mol Fe)

= 89 g Fe

Fe2O3 will produce 1.1 mol Fe × (55.845 Fr/1 mol Fe)

= 61 g Fe

9) Since Fe2O3 is the limiting reactant, the ideal yield of Fe for the reaction is 61 g. If the actual reaction only gave us 25 g Fe. then the percent yield of Fe is

%yield = (25 g Fe/61 g Fe) × 100% = 41%

10) If we only got 25 g Fe, then the amount of Al actually used in the reaction is

25 g Fe × (1 mol Fe/55.845 g Fe) = 0.45 mol Fe

0.45 mol Fe × (2 mol Al/2 mol Fe) = 0.45 mol Al

0.45 mol Al × (26.98 g Al/1 mol Al) = 12 g

Therefore, the leftover amount of Al is

25 g Al - 12 g Al = 13 g Al

8 0

3 years ago

Guys help please!! any five effects of heat!!

Bogdan [553]

${\huge {\underline {\underline {\bold {\blue{Effects \: of \: Heat}}}}}}$

Expansion of particles of substances.
Increase in temperature.
Change in state.
Change in physical property
It may bring out chemical changes.

__________________________________

$\tt\underline\orange{hope \: it \: helps}$

3 0

2 years ago

What mass of carbon dioxide gas occupies a volume of 81.3L at 204 kPa and a temperature of 95.0°C?

alexandr1967 [171]

Answer:

236.9g

Explanation:

Given parameters:

Volume of gas = 81.3L

Pressure of gas = 204kPa

temperature of gas = 95°C

Unknown:

Mass of carbondioxide gas = ?

Solution:

To solve this problem, the ideal gas law will be well suited. The ideal gas law is a fusion of Boyle's law, Charles's law and Avogadro's law.

Mathematically, it is expressed as;

PV = nRT

the unknown here is n which is the number of moles;

P is the pressure, V is the volume, R is the gas constant and T is the temperature.

convert pressure into atm

101.325KPa = 1atm

204 kPa = $\frac{204}{101.325}$ = 2atm

Convert temperature to Kelvin; 95 + 273 = 368K

2 x 81.3 = n x 0.082 x 368

n = $\frac{2 x 81.3}{0.082 x 368}$ = 5.38moles

Since the unknown is mass;

Mass = number of moles x molar mass

Molar mass of carbon dioxide = 12 + 2(16) = 44g/mol

Mass = 5.38 x 44 = 236.9g

5 0

3 years ago

Which is a molecule? A. Ne B. NaCL C. Trail Mix D. graphene

elixir [45]

B) NaCl is a molecule.

5 0

3 years ago

What are the components of the formula for finding force?

blsea [12.9K]

The force of a system can be measured by formula P=mf where P is the force, m is the mass of the system and f is the acceleration of the system. The formula is known as Newton's second law of motion.

3 0

3 years ago

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