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Sphinxa [80]
3 years ago
6

Why might it be important to test one variable at a time when doing an experiment?

Chemistry
1 answer:
Vanyuwa [196]3 years ago
4 0

Answer:

If you change everything at once, you may not know what caused the end result.

Explanation:

If you have Variable A (Salt), Variable B (Potassium), and the Control of Water, you might mix everything together, so you mix salt, potassium and water together. It is known that Potassium reacts very aggressively in water, but since you mixed everything together, you might think that salt+potassium+water goes boom, while it is actually potassium+water=boom.

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Explain why, when performing stoichiometric calculations, it is
pshichka [43]

Answer:

Stoichiometric Coefficients

The balanced equation makes it possible to convert information about one reactant or product to quantitative data about another element. Understanding this is essential to solving stoichiometric problems

Explanation:

3 0
3 years ago
Calculate the pH of a solution in which [OH–] = 4.5 × 10–9M.
posledela

Answer:

5.65 is the pH.

Explanation:

I am assuming that you are asking for confirmation on your answer. The answer is 5.65.

You would do:

[pOH] = -log[OH-]

          = -log[4.5*10^-9]

         equals about 8.3468

To find pH your would subtract the pOH from 14.

14-8.3468 = 5.65 << Rounded to match the answer choices.

7 0
3 years ago
The numerator is the blank number in a fraction, while the denominator is the blank number in a fraction
tigry1 [53]
The top number of a portion is called its numerator whereas the bottom number is its denominator. So a Fraction is the quantity of shaded parts separated by the quantity of a balance of as demonstrated as follows: number of shaded parts is the numerator over the whole part which is the denominator.
8 0
3 years ago
Potassium and sodium chloride are similar in charge and they both have the same anion.  When comparing sodium chloride (36 g / 1
lesya [120]
Sodium Chloride has a higher solubility. 
7 0
3 years ago
A protein is a polymer that is made of a. simple sugars. c. amino acids. b. nitrogen and carbon dioxide. d. DNA.
MA_775_DIABLO [31]
Hello Lilsavage717, I believe the answer you are looking for is C. or Amino Acids. They are mainly located in living things like plants or bugs. 
7 0
3 years ago
Read 2 more answers
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