not used up in a reaction
the product of a combustion reaction
one of the reactants in a single-replacement reaction
a solid product of a reaction
Answer: Option (a) is the correct answer.
Explanation:
A catalyst is the substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
A catalyst changes the path of reaction so that molecules with lower energy can easily participate in the reaction. As a result, formation of products increases.
Thus, we can conclude that out of the given options, a catalyst is not used up in a reaction.
1. Color comparison
Il. Taste comparison
III. Boiling Test
iv.
Melting Test
Answer:
boiling test or melting test
Explanation:
Answer: D - a nonpolar covalent bond
Explanation: because opposites attract?
Answer:
14.1648 grams of oxygen gas will be left.
Explanation:
Moles of magnesium metal =
Moles of oxygen gas =
According to reaction, 2 mol of magnesium react with 1 mol of oxygen gas .
Then 2.5833 moles of magnesium will react with:
of oxygen gas.
Moles of oxygen left unreacted =1.7343 mol - 1.29165 mol = 0.44265 mol
Oxygen gas is an excessive reagent.
Mass of 0.44265 moles of oxygen gas:
0.44265 mol × 32 g/mol = 14.1648 g
14.1648 grams of oxygen gas will be left.
(1) formula masses
(2) molecular polarities
(3) pH values
(4) specific heats
Answer: option 2. molecular polarities
Explanation:
The liquids hexane and water are placed in a test tube. The test tube is stoppered, shaken, and placed in a test tube rack. The liquids separate into two distinct layers because hexane and water have different molecular polarities. The answer is number 2.
+2
B.
-1
C.
+1
D.
-2
The electrical charge of the oxygen ion is -2.