Pure substances are made of the same material and have almost the same properties such as: Carbon, Iorn, Water, Sugar, Salt, and Nitrogen.
Answer:
4 2He
Explanation:
Please see attachment for explanation
2.B. Describe the difference between a reaction that occurs spontaneously and one that does not. Spontaneous chemical reactions release energy and use that energy to power itself; non-spontaneous chemical reactions need to absorb energy, which they can't absorb their own energy that they don't even have.
Answer:
the final concentration of HCl is 3.72 M
Explanation:
Given that;
V1 = 922.0 mL, M1 = 4.73 M
V2 = 549.0 mL, M2 = 2.03 M
so final concentration of HCL
= (( M1V1) + (M2V2)) / (V1 + V2)
(( 4.73 × 922.0)) + (2.03 × 549.0)) / (922.0 + 549.0)
= 5475.53 / 1471.0
= 3.7223 ≈ 3.72 M
Therefore the final concentration of HCl is 3.72 M
Answer:
D is the answer
Explanation:
<h2>This is because the mole is the unit of amount in chemistry. ... A mole of a substance is defined as: The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C. Fundamental units may be atoms, molecules, or formula units, depending on the substance concerned and the proportional should be put into so the values can come out in specifc liter.</h2>