Boron fluoride obeys the octet rule. True or false

Chemistry

2 answers:

FromTheMoon [43]2 years ago

8 0

Answer:

True? I think.

Explanation:

Nadya [2.5K]2 years ago

7 0

True - Boron fluoride do obey the octet rule

Explanation:

BF3 follows the octet rule because Boron has 3 electrons on its outer shell and it can give out one electron each to the 3 fluorine atoms. This gives each Fluorine ion eight electrons and Boron ends up with no electrons on the outer shell.

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How many grams of potassium chloride are required to make 250 ml of a 0.75 m kcl solution?

DedPeter [7]

Answer:

The solution would need 13.9 g of KCl

Explanation:

0.75 m, means molal concentration

0.75 moles in 1 kg of solvent.

Let's think as an aqueous solution.

250 mL = 250 g, cause water density (1g/mL)

1000 g have 0.75 moles of solute

250 g will have (0.75 . 250)/1000 = 0.1875 moles of KCl

Let's convert that moles in mass (mol . molar mass)

0.1875 m . 74.55 g/m = 13.9 g

7 0

3 years ago

Water is flowing in a pipe with a mass flow rate of 100.0 lb/h (M water H,O=18.016). What is the (i) Molar flow rate of H20 (gmo

Arada [10]

Answer:

i) 0,7 molH20/s

ii)11,2 g O/s

iii)1,4 g H/s

Explanation:

i) To find the molar flow rate of water, we just convert the mass of water to moles of water using its molecular weight(g/mol) and changing to the proper units (lb to grames and hours to seconds):

$100 \frac{lb}{h}*\frac{453,5g}{1 lb}*\frac{1molH20}{18,016g}*\frac{1h}{3600s}=0,7\frac{molH20}{s}$