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3 years ago

Select the correct answer.

Chemistry

2 answers:

solong [7]3 years ago

6 0

Answer:

It determines how difficult it is to start the reaction.-B.

vlada-n [284]3 years ago

3 0

B. it determines how difficult it is to start the reaction

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Write the equilibrium constant formula for the following reaction: 2H2+O2 yields 2H2O

Anvisha [2.4K]

$2 H_{2} + O_{2} ---\ \textgreater \ 2H_{2}O

$

$K= \frac{ [H_{2}O]^{2} }{ [H_{2}]^{2} [O_{2}]}$

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3 years ago

Read 2 more answers

Can someone please help me please?

raketka [301]

Answer:

stop posting the same problem someone will answer in time

5 0

3 years ago

Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen,

Sati [7]

Answer:

The answer is: Law of multiple proportions

Explanation:

The law of multiple proportions is a law of chemical combination given by Dalton in 1803.

According to this law, if more than one chemical compound is formed by combining two elements, then the mass of an element that combines with the fixed mass of other element is represented in the form of small whole number ratio.

<u>Therefore, is an illustration of the law of the law of multiple proportions.</u>

8 0

3 years ago

Acenapthalene has the empirical formula C6H5. A solution of 0.515 g of acenapthalene in 15.0 g CHCl3 boils at 62.5oC. The normal

german

Answer:

The molecular formula of an ascenapthalene is $C_{12}H_{10}$

Explanation:

$\Delta T_b=K_b\times m$

$\Delta T_b=K_b\times \frac{\text{Mass of acenapthalene}}{\text{Molar mass of acenapthalene}\times \text{Mass of chloroform in Kg}}$

where,

$\Delta T_f$ =Elevation in boiling point = $(62.5-61.7)^oC=0.8^oC$

Mass of acenapthalene = 0.515 g

Mass of $CHCl_3$ = 15.0 g = 0.015 kg (1 kg = 1000 g)

$K_b$ = boiling point constant = 3.63 °C/m

m = molality

Now put all the given values in this formula, we get

$0.8^0C=3.67 ^oC/m\times \frac{0.515}{\text{Molar mass of acenapthalene}\times 0.015kg}$

$\text{Molar mass of acenapthalene}=155.7875 g/mol$

Let the molecule formula of the Acenapthalene be $C_{6n]H_{5n}$

$6n\times 12 g/mol+5n\times 1 g/mol=155.7875 g/mol$

n = 2.0

The molecular formula of an ascenapthalene is $C_{12}H_{10}$

4 0

4 years ago

What are the chemical symbols for the elements calcium, carbon, and chlorine respectively? es

laiz [17]

The answer is letter c

7 0

3 years ago