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romanna [79]
3 years ago
15

Why is it important that a hypothesis be stated so that it can be modified?

Chemistry
1 answer:
ANEK [815]3 years ago
3 0
Because you need to know what you are looking for before actually trying something so you can prevent any accidents by doing stuff at random
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a 1.642 g sample of calcium bromide is dissolved in enough water to give 469.1 mL of solution what is the bromide ion concentrat
aleksklad [387]

The bromide concentration in this solution of calcium bromide dissolved in enough water to give 469.1 mL is 1.75 × 10-⁵M.

<h3>How to calculate concentration?</h3>

The concentration of a solution can be calculated by dividing the number of moles of the substance by its volume.

No of moles of calcium bromide is calculated as follows:

moles = 1.642 ÷ 199.89 = 8.215 × 10-³moles

Molarity = 8.215 × 10-³moles ÷ 469.1mL = 1.75 × 10-⁵M

Therefore, the bromide concentration in this solution of calcium bromide dissolved in enough water to give 469.1 mL is 1.75 × 10-⁵M.

Learn more about concentration at: brainly.com/question/10725862

#SPJ1

4 0
2 years ago
Which of the following choices is a sign that a glacier was present at one point in history?
Alja [10]

answer:

B. U-shaped valleys

4 0
3 years ago
if we all have atoms and atoms technically never touch then we've never touched anything in our lives. is this true?
jekas [21]

Answer:

We are all made out of atoms, yes this is true. And atoms never touch each other. So no sir, i did not punch that little boy.

Explanation:

8 0
3 years ago
Melting point 134-137C you range 125-146C is sample pure?
nika2105 [10]
No because the deviation from the theoretical value is quite high and the temperature range of your sample is too wide.
5 0
4 years ago
You are so excited-your first summer job! You are a hot-tub maintenance assistant. You travel to homes, making sure the pH of th
AfilCa [17]

Answer: well i guess we can say that  is a scale used to specify the acidity or basicity of an aqueous solution and it is important to keep ph of hot tub water between 7 and 7.6 because if it is not balanced the water  can negatively affect your tub.

Explanation:

pH is an extremely important chemical level to maintain in your spa's water chemistry. A high pH or a low pH will spell trouble for you and your spa. On the pH scale, a reading of 7.4-7.6 indicates perfectly balanced pH. Any number lower than 7.4 means that your water is now considered “acidic”.

6 0
3 years ago
Read 2 more answers
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