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stellarik [79]
3 years ago
7

What causes this trend of atomic radius

Chemistry
1 answer:
STatiana [176]3 years ago
6 0

Answer:

this is the answer, i dont know what test youre doing but i hope it helps

Explanation:

the amount of electrons in the entire atom, each shell has its own amount so, the first shell contains 2, which is closest to the nucleus. the next one has 8, 3rd has 18, and so on.

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A chemist must dilute 97.1 ml of aqueous magnesium fluoride solution until the concentration falls to 389 microMolarity . He'll
mojhsa [17]

Answer:

0.302L

Explanation:

<em>...97.1mL of 1.21m M aqueous magnesium fluoride solution</em>

<em />

In this problem the chemist is disolving a solution from 1.21mM = 1.21x10⁻³M, to 389μM = 389x10⁻⁶M. That means the solution must be diluted:

1.21x10⁻³M / 389x10⁻⁶M = 3.11 times

As the initial volume of the original concentration is 97.1mL, the final volume must be:

97.1mL * 3.11 = 302.0mL =

0.302L

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3 years ago
What does dinitogen mean in a name
Svet_ta [14]
More information please i will need help
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3 years ago
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 How much energy is needed to raise the temperature of 125g of water from 25.0oC to 35.0oC?  The specific heat of water is 4.184
Anvisha [2.4K]

Hello!

To find the amount of energy need to raise the temperature of 125 grams of water from 25.0° C to 35.0° C, we will need to use the formula: q = mcΔt.

In this formula, q is the heat absorbed, m is the mass, c is the specific heat, and Δt is the change in temperature, which is found by final temperature minus the initial temperature.

Firstly, we can find the change in temperature. We are given the initial temperature, which is 25.0° C and the final temperature, which is 35.0° C. It is found by subtract the final temperature from the initial temperature.

35.0° C - 25.0° C = 10.0° C

We are also given the specific heat and the grams of water. With that, we can substitute the given values into the equation and multiply.

q = 125 g × 4.184 J/g °C × 10.0° C

q = 523 J/°C × 10.0° C

q = 5230 J

Therefore, it will take 5230 joules (J) to raise the temperature of the water.

6 0
4 years ago
compared to the energy released per mole of reactant during chemical reactions the energy released per mole of reactant during n
Zolol [24]

Answer:

\boxed{\text{Roughly a million times greater}}.

Explanation:

For example, the energy released in burning 1 mol of octane, a component of gasoline, is about 5000 kJ.

The energy released in the fission of 1 mol of uranium-235 is

about 1.5 × 10¹⁰ kJ .

The ratio is  

\dfrac{1.5 \times 10^{10} }{5000} \approx 3 \times 10^{6}\\\\\text{The energy released by nuclear reactions is } \boxed{\textbf{roughly a million times greater}}\\\text{ than that released during chemical reactions.}

5 0
4 years ago
A substance that is ______ will NOT dissolve in a solvent. A) freezing B) insoluble C) evaporating D) soluble
Alexxandr [17]

Answer:

insoluble

Explanation:

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