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asambeis [7]
2 years ago
15

Observations are made by using one of the five senses (touch, sight, taste, smell, hearing) to gather information.

Chemistry
2 answers:
sergejj [24]2 years ago
5 0
B. The rock is purple.
svp [43]2 years ago
4 0

answer B the rock is purple

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A 10.00 mL sample of vinegar (an aqueous solution of acetic acid) is titrated with 0.5062 M NaOH(aq) and 16.58 mL is required to
sammy [17]

Answer:

5.01%

Explanation:

Density of vinegar = mass/volume

Mass of 10.00 mL = density x volume

                           = 1.006 x 10 = 10.06 g

From the equation of reaction:

CH_3COOH(aq)+NaOH(aq)-->CH_3COONa(aq)+H_2O(l)

1 mole pf CH3COOH requires 1 mole of NaOH for neutralization.

mole of NaOH = molarity x volume

                      = 0.5062 x 0.01658

                       = 0.008392796‬ mole

0.008392796‬ mole of NaOH will therefore require 0.008392796‬ mole of CH3COOH.

mass of CH3COOH = mole x molar mass

                                     = 0.008392796‬ x 60.052

                                      = 0.504 g

Percentage by mass of acetic acid in the vinegar = 0.504/10.06 x 100%

    = 5.01%

The percent by mass of acetic acid in the vinegar is 5.01%

3 0
3 years ago
A speed-time graph shows a line sloping downward. How was the speed changing?
Mice21 [21]
It means it has a constant deceleration
3 0
3 years ago
Pls help asap I’ll give brainliest
boyakko [2]

Answer:

2,1,2

......................

3 0
2 years ago
What does this mean???
satela [25.4K]

Answer:

Its known as static electricity

8 0
2 years ago
Name the following FBr. ?
gogolik [260]

Answer:

FBr is a chemical formula representing "flourine monobromide."

Explanation:

Of course, FBR could represent a number of things, from the Federal Board of Revenue to a fluidized bed reactor. I gave the answer I did because you listed this question as Chemisty.

4 0
3 years ago
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