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3 years ago

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level?

1 answer:

5 0

The answer is b. fluorine (F). This is because fluorine is a more electronegative (electron loving) atom compared to oxygen. It is found on the 7th group of the periodic table, so it has 7 valence electrons. It only needs one more electron to achieve the ideal number of valence electrons which is 8. Oxygen, on the other hand, is in group 6 so it needs 2 more electrons to complete its valency. Helium can't be the answer because it is already in group 8, meaning it is already stable and won't release energy.

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What is the. color for base??????

valina [46]

It depends on the pH if the base. but normally light colors are for bases example blue green etc

4 0

3 years ago

What is the molarity of a solution composed of 5.85 g of potassium iodide, KI, dissolved

Troyanec [42]

Answer:

0.282 M

General Formulas and Concepts:

Chemistry - Solutions

Reading a Periodic Table
Using Dimensional Analysis
Molarity = moles of solute / liters of solution

Explanation:

Step 1: Define

5.85 g KI

0.125 L

Step 2: Identify Conversions

Molar Mass of K - 39.10 g/mol

Molar Mass of I - 126.90 g/mol

Molar Mass of KI - 39.10 + 126.90 = 166 g/mol

Step 3: Convert

$5.85 \ g \ KI(\frac{1 \ mol \ KI}{166 \ g \ KI} )$ = 0.035241 mol KI

Step 4: Find Molarity

M = 0.035241 mol KI / 0.125 L

M = 0.281928

Step 5: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.281928 M ≈ 0.282 M

7 0

3 years ago

For the reaction represented by the equation  2Fe + O2 → 2FeO, how many moles of iron oxide will be produced from 8.00 mol of ir

STatiana [176]

Answer:

8.00 moles.

Explanation:

The ratio of Fe to FeO is 2:2 = 1:1, so 8 moles are produced.

8 0

3 years ago

A box sitting on a floor. Maria and Sam push on the box in opposite direction. Maria pushes to the right using 95 N of Force and

Gemiola [76]

It would move to the right with 15 N of force :)

5 0

3 years ago

Read 2 more answers

Which process can separate out the solute from the solvent?

sineoko [7]

Evaporation of the solution

3 0

3 years ago