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velikii [3]
3 years ago
15

Which one of the following can be separated by physical means:

Chemistry
2 answers:
WINSTONCH [101]3 years ago
8 0

Answer:

B mixture can be separated by physical means

valentina_108 [34]3 years ago
7 0

Answer:

this is compound ok or not

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A chemist wants to make 6.5 L of a 0.340 M CaCl2 solution. Part A What mass of CaCl2 (in g) should the chemist use? Express your
katovenus [111]

Answer:

The answer to your question is 245 grams

Explanation:

Data

Volume 6.5 L

Molarity = 0.34

mass of CaCl₂ = ?

Process

1.- Calculate the molar mass of CaCl₂

molar mass = (1 x 40) + (2 x 35.5)

                   = 40 + 71

                   = 111 g

2.- Convert the grams to moles

                       111 g of CaCl₂ -------------- 1 mol

                         x                   ---------------0.34 mol

                         x = (0.34 x 111) / 1

                         x = 37.74 g

3.- Calculate the total mass

                        37.74 g ------------------ 1 L

                            x        ------------------ 6.5 L

                            x = (6.5 x 37.74) / 1

                            x = 245.31

3 0
3 years ago
Model describe how you would show j.j. thomson's model of the atom using small beads and clay
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What is the total number of hydrogen atoms contained in one molecule of (NH4)2C204?
Ber [7]

Answer:

=8 atoms

Explanation:

In (NH4)2C2O4 there are four moles of Hydrogen in the compound (NH4), but there two molecules of (NH4) in this compound.  That's what the 2 in (NH4)2 means, so multiply 4 x 2 = 8.

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3 years ago
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How to convert n butylbenzene to benzoic acid​
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<u>Answer:</u>

<u>When an alkyl benzene is heated with strong oxidizing asgents like acidic or alkline KMnO4</u>

<u> or acidified K2Cr2O7</u>

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<u> group irrespective of the size of the chain.</u>

Explanation:

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Does heat only flow upward? Yes or No?
Vlad1618 [11]

Answer:

no

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