3 years ago

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Chemistry

1 answer:

docker41 [41]3 years ago

4 0

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Plzz help guysss!! <br>How long would it take you to travel 8 miles at a speed of 1 mile per hour?

GrogVix [38]

Answer:

ksjdhfbjkdfbvbdvb

Explanation:

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3 years ago

D=___g/mL<br> v=100mL<br> m=1.5kg=___g

Bess [88]

The volume is 100mL.

The mass is 1.5kg which is equal to 1500g.

Thus, the density is 1500g / 100mL which is 15g/mL.

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4 years ago

Find [H+] of a 0.056 M hydrofluoric acid solution. Ka = 1.45 x 10-7

brilliants [131]

Answer: $[H^+]$ of 0.056 M HF solution is $8.96\times 10^{-5}$

Explanation:

$HF\rightarrow H^+F^-$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.056 M and $\alpha$ = ?

$K_a=1.45\times 10^{-7}$

Putting in the values we get:

$1.45\times 10^{-7}=\frac{(0.056\times \alpha)^2}{(0.056-0.056\times \alpha)}$

$(\alpha)=0.0016$

$[H^+]=c\times \alpha$

$[H^+]=0.056\times 0.0016=8.96\times 10^{-5}$

Thus $[H^+]$ of 0.056 M HF solution is $8.96\times 10^{-5}$

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3 years ago

When an electric current passes through water, _____ takes place, breaking down the compound into hydrogen and oxygen. a physica

PSYCHO15rus [73]

Electrolysis takes place when an electric current passes through water.

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3 years ago

Read 2 more answers

Which of the following elements has the highest atomic radius, Sr or Cu

cestrela7 [59]

Answer:

Sr or Strontium

Explanation:

sr: strontium has atomic radius of 255pm

cu: copper has an atomic radius of 128pm

they teach you in chem how to do it based off the chart but I don't remember that method

6 0

3 years ago