An aqueous solution of sodium borate (201.2 g/mol) is sometimes used to fire-proof wood.
a. What is the molarity of 2.50 L of solution that contain
1.85 moles of sodium borate?
b. What is the molarity of 45.0 L of solution that contains
6.78 kg of sodium borate?
c. How many moles of sodium borate are in 600.0 mL of a
1.57 M sodium borate solution?
d. A chemišt needs 50.8 g of sodium borate for a reaction.
How many milliliters of 1.87 M solution contain this
mass?

quartz

explanation:

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

5.6⋅10−^19  j

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