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3 years ago

Are u bored of science?

Chemistry

2 answers:

krek1111 [17]3 years ago

6 0

Answer:

Physical Science is pretty good for the most part.

Explanation:

Kryger [21]3 years ago

6 0

No i love science for some reason, its just entertaining. Ive been forced to study really hard my entire life so no wonder i like science. I hate reading so much, novels dont interest me at all unless theyre really short like a charles and mary lamb story but for some reason i like wasting my time on random science encyclopedias when i go out

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For Questions 1 through 4 - Consider a solution prepared by combining 45.0 g of BaCl2 with enough water to prepare a 750.0 mL of

astra-53 [7]

Answer: The molality of barium chloride solution is 0.289 m

Explanation:

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of water = 1 g/mL

Volume of water = 748 mL

Putting values in above equation, we get:

$1g/mL=\frac{\text{Mass of water}}{748mL}\\\\\text{Mass of water}=(1g/mL\times 748mL)=748g$

To calculate the molality of solution, we use the equation:

$\text{Molality}=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

where,

$m_{solute}$ = Given mass of solute (barium chloride) = 45.0 g

$M_{solute}$ = Molar mass of solute (barium chloride) = 208.23 g/mol

$W_{solvent}$ = Mass of solvent (water) = 748 g

Putting values in above equation, we get:

$\text{Molality of barium chloride solution}=\frac{45\times 1000}{208.23\times 748}\\\\\text{Molality of barium chloride solution}=0.289m$

Hence, the molality of barium chloride solution is 0.289 m

5 0

3 years ago

Name CH3CH2CH2CH=CHCH3

blondinia [14]

Answer:

Hexene

hope it helps.....

8 0

3 years ago

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Which of the following obtain their energy from the organisms they eat?

Zepler [3.9K]

The white-tailed deer. (D)

The rest are plants, which make their own energy from photosynthesis.

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4 years ago

Read 2 more answers

Which one of the following reactions would produce t-butyl methyl ether in high yield?

swat32

Answer:

D) sodium t-butoxide + bromomethane

Explanation:

The alkoxide ion is a strong nucleophile, that unlike alcohols, will react with primary alkyl halides to form ether. This general reaction is known as the Williamson synthesis, and is a SN₂ displacement. The alkyl halide must be primary so the back side attack is not hindered, and the alkoxide ion must be formed with the most hindered group.

The mechanism can be seen in the attachment.

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4 years ago

Ha is a monoprotic weak acid. if a 0.015 m ha solution is 2.5% dissociated (or ionized), what is the acid dissociation constant

gladu [14]

Get on mathpapa is shows you the answer and how to explain it

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3 years ago