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3 years ago

Atomic emission spectra often have gaps that help to create the color lines. What is the best explanation for the gaps?

Chemistry

2 answers:

kari74 [83]3 years ago

8 0

Answer:

Explanation:

Atomic emission spectra often have gaps that help to create the color lines.

These gaps occur as a result of heat energy absorbed by electrons in the atoms, making them to be excited and allow them to jump into higher energy levels by emitting only particular quantized energies in the form of light.

Therefore, the correct option is "C"

(C) Only particular quantized energies are given off by excited electrons in the form of light.

g100num [7]3 years ago

6 0

Answer:

Explanation:

done on usa test prep

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Which of the following compounds are soluble in aqueous solutions? Select ALL that are soluble.

sattari [20]

<h3>Answer:</h3>

K₂S
CaSO₄ (slightly soluble in water)
Pb(ClO₄)₂

<h3>Explanation:</h3>

Mg(OH)₂ and CoCO₃ are insoluble in water.
Solubility rules are used to determine whether a compound will be soluble or not soluble in aqueous form.
K₂S is soluble in aqueous solutions as all salts of Potassium are soluble in water.

Calcium (ii) sulfate is slightly soluble in water.
Hydroxides are insoluble in water except, KOH, NaOH and NH₄OH.and Barium hydroxide. Therefore, Mg(OH)₂ is an insoluble hydroxide.

CoCO₃ is insoluble since carbonates are insoluble except K₂CO₃, Na₂CO₃ and (NH₄)₂CO₃. .

Pb(ClO₄)₂ is soluble because all perchlorates are soluble.

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3 years ago

A) Of options (a) - (d) below, highlight the (unbalanced) chemical equation that represents

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Answer:

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7 0

3 years ago

Balance the following chemical equation: N2H4+O2→ NO2+H2O

Nadya [2.5K]

Answer:

N2H4 + 3O2 → 2NO2 + 2H2O

Explanation:

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2 years ago

Would the calculated molar mass be higher, lower, or the same as the actual molar mass of the compound if the unknown contained

Delicious77 [7]

Answer:

higher

Explanation:

If it contains a impurity that is insoluble it won't dissolve completely, the solution would be smaller than it is supposed to be, when compared to a compound without such insoluble impurity. Molecular weight determination won't be accurate because the molecular weight obtained will be higher as a result of the fact that the mass of the solute would include the actual solute that is changing the temperature and the excess mass of the impurity.

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2 years ago

An Erlenmeyer flask contains 25.00 mL of 0.500 M HCl before a titration is begun. How many moles of hydrogen ions are present in

Sliva [168]

Answer:

0.0125 mol.

Explanation:

<em>Molarity of a solution is the no. of moles of a solute per 1.0 L of the solution.</em>

M of HCl = 0.5 mol/L.

V = 25.0 mL = 0.025 L.

<em>∴ no. of moles of HCl present in the flask at this time = MV</em> = (0.5 mol/L)(0.025 L) = <em>0.0125 mol.</em>

6 0

3 years ago