3 years ago

HELP ASAP

Chemistry

2 answers:

emmainna [20.7K]3 years ago

8 0

Answer:

Explanation:

Hurricane category numbers, from 1-5, are based off of what wind speed the hurricane is. Each category has a certain wind speed number that the hurricane must be in for it to qualify.

sveta [45]3 years ago

3 0

Uhh I think d sorry if wrong ;-;

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Use the mass and volume data to calculate the density of liquid propane to the nearest hundredth. Mass of propane = 4,300 g Volu

erma4kov [3.2K]

the answer is becasue i just had this question and i got got it wrong so te answer is 0.43

8 0

4 years ago

Read 2 more answers

A lab team places 0.250g of an unknown solid acid in an Erlenmeyer flask. They neutralize the solid acid with 15.0ml of 0.210 M

Otrada [13]

Answer:

Molar mass of the unknown acid is 79 grams

Explanation:

We have to first get moles in 15.0 ml of sodium hydroxide solution:

${ \sf{1 \: l \: of \:NaOH \: contains \: 0.210 \: moles }} \\ { \sf{0.015 \: l \: of \: NaOH \: contain \: (0.015 \times 0.210) \: moles }} \\ { \underline{ = 0.00315 \: moles \: of \: NaOH}}$

since mole ratio of acid : base is 1 : 1, so;

moles of acid that reacted is 0.00315 moles of the unknown acid.

then we've to get molar mass:

${ \sf{0.00315 \: moles \: of \: acid \: weigh \: 0.250 \: g}} \\ { \sf{1 \: mole \: of \: acid \: weighs \: ( \frac{1 \times 0.250}{0.00315} ) \: g}} \\ { \underline{ = 79.4 \: g \approx79 \: grams}}$