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3 years ago

Which type of chemical model shows the bond angle and bond length bewteen atoms and compunds

Chemistry

1 answer:

Ivan3 years ago

5 0

A molecular structure shows the bond angle and the Bond length between different atoms in a compound.

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Consider the following equation in chemical equilibrium. C2H4(g) + H2(g) mc009-1.jpg C2H6(g) + 137 kJ What happens to the amount

Novosadov [1.4K]

The correct answer is a) the amount of ethane decrease.
because this reaction is an exothermic reaction and the heat is a product of this reaction, So when the number of temperature increases so (more heat will be added) so the reaction will go leftward (toward reactants ) so the amount of C2H4 & H2 will increase and the amount of ethane C2H6 will decrease.

8 0

3 years ago

Read 2 more answers

A gas in a rigid container has a pressure of 3.5 atm at 200. k calculate the pressure at 273 k

rusak2 [61]

Answer:

4.78atm

Explanation:

From the question, we obtained the following:

P1 (initial pressure) = 3.5 atm

T1 (initial temperature) = 200K

T2 (final temperature) = 273K

P2 (final pressure) =?

Using P1/T1 = P2/T2, the final pressure can be obtained as shown below:

P1/T1 = P2/T2

3.5/200 = P2/273

Cross multiply to express in linear form as shown below:

200 x P2 = 3.5 x 273

Divide both side by 200

P2 = (3.5 x 273)/200

P2 = 4.78atm

Therefore, the pressure at 273K is 4.78atm

6 0

3 years ago

Hydrogen chloride gas and oxygen gas react to form water and chlorine gas. A reaction mixture initially contains 53.2 g of hydro

Sergio [31]

Answer: The mass of the excess reactant (oxygen gas) is 3.136 grams

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For HCl:

Given mass of HCl = 53.2 g

Molar mass of HCl = 36.5 g/mol

Putting values in equation 1, we get:

$\text{Moles of HCl}=\frac{53.2g}{36.5g/mol}=1.46mol$

For oxygen gas:

Given mass of oxygen gas = 26.5 g

Molar mass of oxygen gas = 32 g/mol

Putting values in equation 1, we get:

$\text{Moles of oxygen gas}=\frac{26.5g}{32g/mol}=0.828mol$

The chemical equation for the reaction of HCl and oxygen gas follows:

$2HCl+O_2\rightarrow H_2O+Cl_2$

By Stoichiometry of the reaction:

2 moles of HCl reacts with 1 mole of oxygen gas

So, 1.46 moles of HCl will react with = $\frac{1}{2}\times 1.46=0.73mol$ of oxygen gas

As, given amount of oxygen gas is more than the required amount. So, it is considered as an excess reagent.

Thus, HCl is considered as a limiting reagent because it limits the formation of product.

Excess moles of oxygen gas = (0.828 - 0.73) = 0.098 moles

Now, calculating the mass of oxygen gas from equation 1, we get:

Molar mass of oxygen gas = 32 g/mol

Excess moles of oxygen gas = 0.098 moles

Putting values in equation 1, we get:

$0.098mol=\frac{\text{Mass of oxygen gas}}{32g/mol}\\\\\text{Mass of oxygen gas}=(0.098mol\times 32g/mol)=3.136g$

Hence, the mass of the excess reactant (oxygen gas) is 3.136 grams

4 0

3 years ago

What is the second most abundant element in earths crust?

FrozenT [24]

C. Silicon

EXPLANATION

Silicon is the second most common element present in the crust with an abundance of 276,900 ppm or equivalent to 27.7%. The most abundant element is oxygen with 46.6%.

8 0

3 years ago

1. How many moles are in 7.32 x 10^24 atoms of iron?

SashulF [63]

Answer:

I believe about 10 moles

Explanation:

6 0

3 years ago