3 years ago

Definition To: The capacity for doing work. It may be transformed from one form to another.

Chemistry

1 answer:

pochemuha3 years ago

4 0

The capacity for doing work is Energy.

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Which of the following is not a part of every scientific investigation?

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What are fossil fuels made from ?

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Need help with this can some please help

vekshin1

I believe you would just put a 2 in front of NH3 and keep the other ones as 1

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3 years ago

If the half life of iridium-182 is 15 years, how much of a 3 gram sample is left after 2 half-lives?

padilas [110]

Answer:

D. 0.75 grams

Explanation:

The data given on the iridium 182 are;

The half life of the iridium 182, $t_{(1/2)}$ = 15 years

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The amount left, N(t) after two half lives is given as follows;

$N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}} }$

For two half lives, t = 2 × $t_{(1/2)}$

∴ t = 2 × 15 = 30

$\dfrac{t}{t_{(1/2)}} = \dfrac{30}{15} = 2$

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3 years ago

Which electrolyte is stronger, NaOH or Ca(OH)2? Why?

nataly862011 [7]

Answer:

NaOH

Explanation:

Look at charge Na has +1 charge and Ca has +2 charge after dissociation . Greater charge Stronger lattice. And as we need weak Lattice, so NaoH is stronger base than Ca(OH)2.

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