3 years ago

1. Which of the following elements has a complete outer shell of electrons?

Chemistry

1 answer:

Savatey [412]3 years ago

3 0

Number one is neon, so C

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Answer:

the number of representative contain in 1 mol of a substance equals to 6.o2x10^23 particles.

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3 years ago

The temperature of a piece of copper with a mass of 95.4g increases from 25 degrees Celsius to 48.0 degrees Celsius when the met

Taya2010 [7]

Answer:

The answer is 3.87 J/g°C

Explanation:

Here is the equation we are going to use:

$C=\frac{q}{mT}$

C= specfic heat in J/g°C

q = heat in joules (J)

m = mass in grams (g)

T = change in temperature

Here is what is given:

q = 849 J

m = 95.4 g

T = 48.0 - 25.0 = 23°C

Find:

Specific heat capacity in J/g

The first thing we are going to do is plug everything into the equation:

$C = \frac{849J}{(9.54g)(23degreesC)}$

Then we are going to solve for C

$C = \frac{849J}{219.42gC} = 3.87 J/gCelsius$

Hope this helps!

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3 years ago

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What term is used to describe when water turns from liquid to gas?

Ainat [17]

The term is vaporization

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3 years ago

For a reaction: aA → Products, [A]o -4.3 M, and the first two half-lives are 56 and 28 minutes, respectively. Calculate k (witho

Mkey [24]

Answer:

C. $3.8\times 10^{-2}$

Explanation:

We are given that

Initial concentration, $[A]_o=4.3 M$

First half life, $t_{\frac{1}{2}}=56$ minutes

Second half life, $t'_{\frac{1}{2}}=28$ minutes

We have to find K.

The given reaction is zero order reaction.

We know that for zero order reaction

$t_{\frac{1}{2}}=\frac{[A]_o}{2k}$

Using the formula

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$k=\frac{4.3}{2\times 56}$

$k=3.8\times 10^{-2}$

Hence, option C is correct.

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Which of the following lines from the story indicates a flashback?

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Is there any picture?

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