All categories

3 years ago

These two particles have approximately the same mass:

Chemistry

1 answer:

ra1l [238]3 years ago

3 0

A. is the answer

plz mark as brainliest. i really need it ;-;

You might be interested in

A 0.020 M solution of niacin has a pH of 3.26. (a) What percentage of the acid is ionized in this solution

mariarad [96]

Answer: 2.75%

Explanation:

$pH=-log [H+]$

$3.26 = -log [H+]$

$[H+] = 5.495\times 10^{-4} M$

$HA\rightleftharpoons H^++A^-$

initial 0.020 0 0

eqm 0.020 -x x x

$K_a=\frac{[H+][A-]}{[HA]}$

$K_a=\frac{[x][x]}{[0.020-x]}$

$x=5.495\times 10^{-4}$

$K_a=\frac{[5.495\times 10^{-4}]^2}{[0.020-5.495\times 10^{-4}]}$

$K_a =1.553\times 10^{-5}$

percent dissociation = $\frac{[H^+_eqm]}{[Acid_{initial}]}\times 100$

percent dissociation= $\frac{5.495\times 10^{-4}}{0.020}\times 100$

Thus percent dissociation= 2.75 %

5 0

3 years ago

Unlabeled atoms joined to carbon atoms, which are not directly part of a ring structure, are assumed to be oxygen atoms.

N76 [4]

The statement above is FALSE.
Unlabeled atom joined to carbon atoms which are not directly part of a ring structure are assumed to be CARBON ATOMS. In a ring structure, an unlabeled atom at the angle where two lines joined together is always assumed to be a carbon atom

3 0

4 years ago

Which one of these situations would have higher density water? Water with a lower salt content Water at the equator Water near w

Nady [450]

Explanation:

water near where a river enters the ocean is having a higher density.

coz, ocean water has salt which increases water's density

6 0

3 years ago

Read 2 more answers

Formaldehyde (h2co) reacts with oxygen to form co2 and h2o. how many moles of co2 will be produced from reacting 2 moles of h2co

bogdanovich [222]

Answer:
2 mol of CO₂

Solution:

The reaction is as follow,

H₂CO + O₂ → CO₂ + H₂O

According to this equation,

1 mole of H₂CO produces = 1 mole of CO₂
So,
2 moles of H₂CO will produce = X moles of CO₂

Solving for X,
X = (2 mol × 1 mol) ÷ 1 mol

X = 2 mol of CO₂

7 0

3 years ago

Read 2 more answers

Explain why is sodium less reactive than potassium

leva [86]

Answer:

As potassium is larger than sodium, potassium's valence electron is at a greater distance from the attractive nucleus and is so removed more easily than sodium's valence electron. As it is removed more easily, it requires less energy, and can be said to be more reactive.

Explanation:

Hope you're having a splendiferous day.

Just a bored kid willing to help...

8 0

3 years ago