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2 years ago

In a chemical equation, what do the coefficients indicate?

Chemistry

2 answers:

just olya [345]2 years ago

8 0

The answer is D. a number preceding an elemental or molecular symbol.

example - 2H2 + O2 -> 2H2O

The underlined is the coefficient.

Mekhanik [1.2K]2 years ago

6 0

In a chemical equation coefficients indicate the number of molecules/atoms involved in the reaction.

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3 years ago

What is Catenation in chemistry?

Eddi Din [679]

Answer:

In chemistry, catenation is the bonding of atoms of the same element into a series, called a chain. A chain or a ring shape may be open if its ends are not bonded to each other, or closed if they are bonded in a ring

Explanation:

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3 years ago

Read 2 more answers

HELP PLS!

olya-2409 [2.1K]

I have the same question right now and i think that it is D

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3 years ago

The half life for the first order conversion of A to B is 56.6 hours. How long does it take for the concentration of A to decrea

sveta [45]

Answer:

It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

Explanation:

A → B

Initial concentration of the reactant = x

Final concentration of reactant = 10% of x = 0.1 x

Time taken by the sample, t = ?

Formula used :

$A=A_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}$

where,

$A_o$ = initial concentration of reactant

A = concentration of reactant left after the time, (t)

$t_{\frac{1}{2}}$ = half life of the first order conversion = 56.6 hour

$\lambda$ = rate constant

$A=A_o\times e^{-(\frac{0.693}{t_{1/2}})\times t}$

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

$0.1x=x\times e^{-(\frac{0.693}{56.6 hour})\times t}$

t = 188.06 hour

It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

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2 years ago

What are the implications for the reader in the line, "For every atom belonging to me as good belongs to you"?

Serggg [28]

The implications are for this reader in this line is that the atom is belonging to some kind of system and it is good belonging to that system.

Hope this helps. :)

- Shelly O

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2 years ago