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3 years ago

How do systems impact creation?

Chemistry

1 answer:

dmitriy555 [2]3 years ago

4 0

Answer:

they can change how we think,move and even how we feel about things!

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Satellite photos of Neptune and Uranus show that both planets have a bluish color. Which gas in their atmospheres gives them thi

Shtirlitz [24]

Answer:

Methane

Explanation:

5 0

3 years ago

Is cycle list Road at an average speed of 15 mph 430 miles how long was the ride

worty [1.4K]

$430/15=28\frac{2}{3}$ hours

4 0

3 years ago

Lithium acetate, LiCH3CO2, is a salt formed from the neutralization of the weak acid acetic acid, CH3CO2H, with the strong base

Vesna [10]

Answer : The pH of 0.289 M solution of lithium acetate at $25^oC$ is 9.1

Explanation :

First we have to calculate the value of $K_b$ .

As we know that,

$K_a\times K_b=K_w$

where,

$K_a$ = dissociation constant of an acid = $1.8\times 10^{-5}$

$K_b$ = dissociation constant of a base = ?

$K_w$ = dissociation constant of water = $1\times 10^{-14}$

Now put all the given values in the above expression, we get the dissociation constant of a base.

$1.8\times 10^{-5}\times K_b=1\times 10^{-14}$

$K_b=5.5\times 10^{-10}$

Now we have to calculate the concentration of hydroxide ion.

Formula used :

$[OH^-]=(K_b\times C)^{\frac{1}{2}}$

where,

C is the concentration of solution.

Now put all the given values in this formula, we get:

$[OH^-]=(5.5\times 10^{-10}\times 0.289)^{\frac{1}{2}}$

$[OH^-]=1.3\times 10^{-5}M$

Now we have to calculate the pOH.

$pOH=-\log [OH^-]$

$pOH=-\log (1.3\times 10^{-5})$

$pOH=4.9$

Now we have to calculate the pH.

$pH+pOH=14\\\\pH=14-pOH\\\\pH=14-4.9=9.1$

Therefore, the pH of 0.289 M solution of lithium acetate at $25^oC$ is 9.1

4 0

4 years ago

When a chemical reaction occurs, what always stays the same between reactants and products?

BlackZzzverrR [31]

The total number of atoms remains unchanged, always. But the chemical properties change :)

please rate brainliest! thanks!

7 0

3 years ago

A) fluorite B) orthoclase C) apatite D) gypsum

Sidana [21]

C

I’m pretty sure it’s c

5 0

3 years ago