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3 years ago

6

-QUESTION 5-

1 answer:

vodomira [7]3 years ago

5 0

The tall trees much of the sun
have you ever been in a forest? if you have, you’ve probably noticed that it’s usually very shady, and not a lot of sunlight hits the ground. That’s cause the tall trees are so dense, the sunlight doesn’t reach the ground

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Consider equimolar samples of different ideal gases at the same volume and temperature. Gas A has a higher molar mass than gas B

dezoksy [38]

Answer:

I don't understand the question

Explanation:

1. c

2. c

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3 years ago

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An aqueous solution of perchloric acid is standardized by titration with a 0.191 M solution of barium hydroxide. If 13.8 mL of b

WARRIOR [948]

Answer:

Molarity of $HClO_{4}$ solution is 0.311 M

Explanation:

Neutralization reaction: $2HClO_{4}+Ba(OH)_{2}\rightarrow Ba(ClO_{4})_{2}+2H_{2}O$

According to balanced reaction, 1 mol of $Ba(OH)_{2}$ neutralizes 2 moles of $HClO_{4}$

Number of moles of $Ba(OH)_{2}$ in 13.8 mL of 0.191 M $Ba(OH)_{2}$ solution = $\frac{0.191}{1000}\times 13.8moles$ = $0.00264moles$

Let's assume molarity of $HClO_{4}$ solution is C (M) then-

Number of moles of $HClO_{4}$ in 17.0 mL of C (M) $HClO_{4}$ solution = $\frac{C}{1000}\times 17.0moles$ = $0.017Cmoles$

Hence, $0.017C=(2\times 0.00264)$

or, $C=0.311$

So, molarity of $HClO_{4}$ solution is 0.311 M

3 0

3 years ago

HELP!!!!!!!!!!!!!!!! PRETTY PLEASE !!!!!!!!!!!!!!!!

I am Lyosha [343]

Answer:

B. 75.0 kPa

Explanation:

P1V1/T1=P2V2/T2

(x * 100 L)/(300 K)=(100 kPa * 50.0 L)/(200 K)

x=75.0 kPa

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4 years ago

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An electron charge e mass m and a positron charge e mass m revolve around their common center of mass under the influence of the

Katen [24]

Answer: v = 2π2 Kme2 Z / nh

Explanation:

The formula for velocity of an electron in the nth orbit is given as,

v = 2π2 Kme2 Z / nh

v = velocity

K = 1/(4πε0)

m= mass of an electron

e = Charge on an electron

Z= atomic number

h= Planck’s constant

n is a positive integer.

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4 years ago

What is an acid in chemistry?

Vikentia [17]

An acid in chemistry is anything with a pH level lower than 7.

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4 years ago

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