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Leto [7]
3 years ago
8

Which formula represents a polar molecule? (1) Br2 (3) CH4 (2) CO2 (4) NH3

Chemistry
1 answer:
ollegr [7]3 years ago
8 0
The formula representing a polar molecule is (4) NH3, for the difference in electronegativity of Nitrogen (N) and Hydrogen (H) is large, and thus it is polar.

Hope this helps~
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Which of the following shows a valid combustion reaction?
marta [7]

Answer:   C2H4 + 3O2 → 2CO2 + 2H2O

Explanation:

2Al + 2O2 → 2AlO + O2            Not Balanced Properly:  2Al + O2 = 2AlO  

C2H4 + 3O2 → 2CO2 + 2H2O  Looks Good

2CH4 + O2 → 2CO + 4H2          Not Correct:  CO should be CO2

Ca + O2 → CaOH                        Not Balanced and No source for the H

3 0
2 years ago
Read 2 more answers
How many moles of hydrogen atoms are there in 120 g of C6H12O6
lys-0071 [83]

Answer: 8.0 moles

Explanation:

0.6661 moles×12 H≈8.0 moles

5 0
3 years ago
If 18 grams of oxygen reacts completely with 4 grams of hydrogen, we would expect how many grams of water? Question 4 options: L
DIA [1.3K]

Answer:

Less than 22 grams because some mass is lost in the reaction

Explanation:

Took the test on K12

8 0
3 years ago
Briefly explain what happens to an organism during the process of petrification. Write your answer in the essay box
Aleksandr [31]

Answer:

YOU BETTER GIVE THEM BRAINLEIST ↑↑↑↑↑

Explanation:

4 0
4 years ago
Please help! :)
Reika [66]

Answer:

There will be 525.2 grams of K3N produced

Explanation:

Step 1: Data given

Number of moles of potassium oxide ( K2O) = 6 moles

Magnesium nitride (Mg3N) = in excess

Molar mass of K3N = 131.3 g/mol

Step 2: The balanced equation

Mg3N2 + 3K2O → 3MgO + 2K3N

Step 3: Calculate moles of K3N

The limiting reactant is K2O.

For 1 mol Mg3N2 consumed, we need 3 moles of K2O to produce 3 moles of MgO and 2 moles of K3N

For 6 moles K2O we'll have 2/3 * 6 = 4 moles of K3N

Step 4: Calculate mass of K3N

Mass of K3N = moles K3N * molar mass K3N

Mass of K3N = 4 moles * 131.3 g/mol

Mass of K3N = 525.2 grams

There will be 525.2 grams of K3N produced

8 0
3 years ago
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