Answer:
A coefficient is a number that is multiplied by a variable of a single term or the terms of a polynomial.
Explanation:
For example, in the term 7x, 7 is the coefficient. I know this because I took tons of notes in math.
Answer:
Endothermic.
Explanation:
Hello there!
In this case, it is possible to answer to the requested question "Is this reaction exothermic, endothermic, or neither?" by looking at the temperature change; thus, since the temperature is diminished from 22.0 °C to 19.0 °C, it is possible to realize that the dissociation reaction:
KCI(8) --> K+ (aq) + Cl- (aq)
Is endothermic as it absorbs heat and therefore the solution gets cooled down. Now for any calculation regarding the heat of reaction, it'd be necessary to assume that the solution has a specific heat equal to the water as the former is mostly composed by the latter and the amount of KCl does not modify the solution significantly.
Best regards!
Yes. Price should be a factor that you consider
The initial volume is 8.42 mL.
<h3>Calculation:</h3>
The dilution formula is used to solve the question.
The dilution formula is given as,
M₁V₁ = M₂V₂
M₁ = initial molarity
M₂ = final molarity
V₁ = initial volume
V₂ = final volume
Given,
M₁ = 0.121 M
M₂ = 0.102 M
V₂ = 10 mL
To find,
V₁ =?
Put the values in the equation,
M₁V₁ = M₂V₂
0.121 × V₁ = 0.102 × 10
V₁ = 8.42 mL
Hence, the initial volume is 8.42 mL.
Learn more about the dilution formula here:
brainly.com/question/17156790
#SPJ4