I can deduce here that the best that describes my choice is: It’s my best explanation for now, but I really would have to test my idea to be sure.
<h3>What is choice?</h3>
Choice actually refers to the act of choosing between two or more things. It has to do with going with the option, idea, decision, product or something that one prefers.
When we make choices, it depicts what we actually want. Some people still make wrong choices. The choices people make can either make or mar them in the present or future.
Looking at the given question, my choice is actually the first option.
It's clear that the idea hasn't been tested in order to be sure though it's has the best explanation.
Learn more about choice on brainly.com/question/6947486
#SPJ1
Answer:
18 is a
19 is c
20 i am not sure
Explanation:
18)nucleus contains protons and neutrons
Answer:
There are 0.0186 moles of formula units in 6.35 grams of aluminum sulfate
.
Explanation:
What's the empirical formula of aluminum sulfate?
Sulfate is an anion with a charge of -2 per ion. When sulfate ions are bonded to metals, the compound is likely ionic.
Aluminum is a group III metal. Its ions tend to carry a charge of +3 per ion.
The empirical formula of an ionic compound shall balance the charge on ions with as few ions as possible.
The least common multiple of 2 and 3 is 6. That is:
- Three sulfate ions
will give a charge of -6. - Two aluminum ions
will give a charge of +6.
Pairing three
ions with two
will balance the charge. Hence the empirical formula:
.
What's the mass of one mole of aluminum sulfate? In other words, what's the formula mass of
?
Refer to a modern periodic table for relative atomic mass data:
- Al: 26.982;
- S: 32.06;
- O: 15.999.
There are
- two Al,
- three S, and
- twelve O
in one formula unit of
.
Hence the formula mass of
:
.
How many moles of formula units in 6.35 grams of
?
.
From the periodic table:
the mass of lithium = <span>6.941 grams
Since lithium is monoatomic, therefore, the molar mass of lithium = </span><span>6.941 grams
Now, we need to calculate the mass of two moles of lithium:
mass of two moles of lithium = 2 * </span><span>6.941 = 13.882 grams
Based on the above calculations, the answer is:
True</span>
Answer:
the petrochemical industry
Explanation:
"Petrochemicals are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane." - Textbook excerpt