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2 years ago

INFER if the total mass of the products in a reaction is 90 grams,

Chemistry

1 answer:

Vaselesa [24]2 years ago

7 0

Answer:

90 grams. Input mass = output mass

Explanation:

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What is the value of ΔG in a spontaneous reaction?

Amanda [17]

The value of Triangle G is A) Less than 0.

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2 years ago

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How many elements are in C5H4O2S

elena-s [515]

Answer:

4 elements

Explanation:

The four elements would be:

C-Carbon

H-Hydrogen

O-Oxygen

S-Sulfur

Hope this helps :)

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2 years ago

When copper is bombarded with high-energy electrons, X rays are emitted. Calculate the energy (in joules) associated with the ph

Scrat [10]

Answer:

E = 12.92 × 10^(-16) J

Explanation:

Formula for energy is;

E = hc/λ

Where;

h is Planck's constant = 6.63 x 10^(-34) J.s

c is speed of light = 3 × 10^(8) m/s

λ is wavelength = 0.154 nm = 0.154 × 10^(-9) m

E = (6.63 x 10^(-34) × 3 × 10^(8))/(0.154 × 10^(-9))

E = 12.92 × 10^(-16) J

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2 years ago

A solution contains 0.021 M Cl and 0.017 M I. A solution containing copper (I) ions is added to selectively precipitate one of t

lidiya [134]

Answer: Copper (I) iodide will precipitate first.

Explanation:

We are given:

$K_{sp}$ of CuCl = $1.0\times 10^{-6}$

$K_{sp}$ of CuI = $5.1\times 10^{-12}$

Concentration of $Cl^-\text{ ion}=0.021M$

Concentration of $I^-\text{ ion}=0.017M$

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

For CuCl:

$K_{sp}=[Cu^+][Cl^-]$

Putting values in above equation, we get:

$1.0\times 10^{-6}=[Cu^+]\times 0.021$

$[Cu^+]=\frac{1.0\times 10^{-6}}{0.021}=4.76\times 10^{-5}M$

Concentration of copper (I) ion = $4.76\times 10^{-5}M$

For CuI:

$K_{sp}=[Cu^+][I^-]$

Putting values in above equation, we get:

$5.1\times 10^{-12}=[Cu^+]\times 0.017$

$[Cu^+]=\frac{5.1\times 10^{-12}}{0.017}=3.00\times 10^{-10}M$

Concentration of copper (I) ion = $3.00\times 10^{-10}M$

For the precipitation of copper (I) ions, we need less concentration of copper (I) ions. So, copper (I) iodide will precipitate first.

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3 years ago

It takes 560 J of energy to raise the temperature of 130.6 g mercury from 20.0°C to 66.5 °C.

Anestetic [448]

Answer:

0.0922 J/g°C

Explanation:

Use the formula Q=mc(delta)T. My teacher called it "M"cat to help my class remember it. Q-energy(560J) M-mass(130.6g) c(specific heat) is what you are solving for and delta T is the change in temperature(66.5-20.0). Put these values in the formula and solve for c.

5 0

2 years ago