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erastovalidia [21]
3 years ago
11

Which of the following values is measured the LEAST precisely? * 22mL 45.2mL 50mL 100mLchem​

Chemistry
1 answer:
nekit [7.7K]3 years ago
7 0

Answer:

If you're looking at the data as a whole, it would most likely be 100ml.

Explanation: The definition of precise is data close together so 100ml is furthest away from the other recorded numbers

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2. Which substance will form a solution with water? (Select all that app
cupoosta [38]

Answer:

sugar and salt, as they can dissolve in water. Sugar and salt have a high solubility in water. So, sugar and salt can form a solution with water.

Explanation:

7 0
2 years ago
A sample of Manganese (II) chloride has a mass of 19.8 grams before heating, and 12.6 grams after heating until all the water is
IRINA_888 [86]

Answer:

no. of water molecules associated to each molecule of MnCl_2 = 4

Explanation:

Mass of MnCl_2 before heating = 19.8 g

Mass of MnCl_2 after heating = 12.6 g

Difference in mass of MnCl_2 before and after heating

                                 = 19.8 - 12.6 = 7.2 g

Difference in mass corresponds to mass of water driven out.

Molar mass of water = 18 g/mol

No. of moles of water = \frac{7.2}{18} = 0.4\ mol

Mass of MnCl_2 obtained after heating is mass of anhydrous MnCl_2.

Mass of anhydrous MnCl_2 = 12.6 g

Molar mass of MnCl_2 = 125.9 g/mol

No. of mol of anhydrous MnCl_2 = \frac{125.9}{125.9} = 0.1\ mol

so,

0.1 mol of MnCl_2 have 0.4 mol of water

1 mol of MnCl_2 will have = \frac{0.4}{0.1} =4\ mol

Hence, no. of water molecules associated to each molecule of MnCl_2 = 4

5 0
3 years ago
Which of the following is true about homogeous mixtures
sergey [27]
Was there supposed to be a picture?
4 0
3 years ago
Alexa is teaching students to measure and compare the speed of a pencil as it is dropped from different heights
Viefleur [7K]
<h3>♫ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ♫</h3>

➷ It is because it involves experimentation and observation of the pencil dropping from different heights.

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

6 0
4 years ago
Read 2 more answers
The atomic mass for Zn is given as 65.39 amu. Explain why there is no actual atom of zinc with an atomic mass of 65.39?
andrew11 [14]

amu stands for atomic mass unit. this is the approximate weight of one proton or neutron. since it is 65.39 you could not have an actual zinc atom that weighed 65 and 39/100s of an atomic particle. instead this number is the average weight of a bunch of zinc particles that differ in numbers of whole amu numbers.

6 0
3 years ago
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