3 years ago

What is the charge of a proton? neutral negative positive

Chemistry

1 answer:

Brilliant_brown [7]3 years ago

4 0

The charge of a proton is positive.

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2 years ago

What are three reasons that using renewable energy is important.

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Explanation:

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2 years ago

The hammer, anvil, and stirrup are all bones found in the ear.

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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

The mass of the sample of iridium, N₀ = 3 grams

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

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

$\therefore N(t) = 3 \times\left (\dfrac{1}{2} \right )^2 = 0.75$

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2 years ago

What rock forms from magma oozing onto the surface?

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2 years ago

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