Answer: 20.1 kg.
Explanation:
To calculate mass of a substance, we use the equation:
We are given:
Density of gasoline =
Volume of gasoline =
(Conversion factor:
)
Putting values in above equation, we get:
The rule apply for multiplication and division is :
The least precise number present after the decimal point determines the number of significant figures in the answer, thus the answer musty have three significant digits.
Hence, the mass added is 20.1 kg.
Answer:
4770 grams of sodium carbonate
Explanation:
The reaction that takes place between sodium carbonate and sulfuric acid is:
- Na₂CO₃ (s) + H₂SO₄ (aq) → Na₂SO₄ (aq) + CO₂(g) + H₂O (l)
First we <u>calculate how many H₂SO₄ moles reacted</u>, using the <em>given concentration and volume of solution</em>:
moles = Molarity * Liters
- moles = 18.0 M * 2.50 L = 45 mol H₂SO₄
Then we <u>convert H₂SO₄ moles into NaCO₂ moles</u>, using the <em>stoichiometric coefficients</em>:
- 45 mol H₂SO₄ *
= 45 mol NaCO₂
Finally we <u>convert 45 NaCO₂ moles into grams</u>, using its <em>molar mass</em>:
- 45 mol NaCO₂ * 106 g/mol = 4770 g
Answer:
You have to remember this memory aid, diagonals and all.
You have to keep a tight tally of the electrons you’ve used so far so you don’t go over the number of electrons in the element you’re working on.
You have to remember how many electrons fit into each subshell (s, p, d, f).
It takes a lot of time, especially when the element has more than 20 electrons.
Explanation:
A catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.
A catalyst will appear in the steps of a reaction mechanism,but it will not appear in the overall chemechal reaction
i hoped this helped
by the way can you mark me the brainliest
.since i was the only one to answer youre question
;P thanks bye