All categories

3 years ago

Which substance is not a compound

Chemistry

2 answers:

Hoochie [10]3 years ago

8 0

No clue, please provide the questions.

Roman55 [17]3 years ago

3 0

Your going to have to take a picture or make a list of the substances so i know which are and are not a compound

You might be interested in

The particle that determines the mass of the atom, along with the proton, is the____

GrogVix [38]

Answer:

neutron

Explanation:

protons plus neutrons equal the mass of the atom

6 0

3 years ago

Which elements are gases at STP?

Gwar [14]

Answer:

hydrogen (H), nitogen (N), oxygen (O), fluorine (F), chlorine (Cl), helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn)

Explanation: found this online, it's best to remember them.

7 0

3 years ago

Ba(oh)2 is a strong electrolyte. determine the concentration of each of the individual ions in a 0.750 m ba(oh)2 solution.

Sindrei [870]

The concentration of each of the individual ions in a 0750 M Ba(OH)2 solution is

[Ba2+] = 0.750 M

[OH-]= 1.50 M

<h3>calculation</h3>

write the equation for dissociation

that is Ba(OH)2 (s)→ Ba2+(aq) + 2OH-(aq)

by use of mole ratio of Ba(OH)2 : Ba2+ which is 1: 1 the concentration of Ba2+ is therefore= 0.750M

by use of mole ratio of Ba(OH)2 : OH- which is 1:2 the concentration of OH- =0.750 M x2/1=1.50 M

7 0

4 years ago

What occurs in the A horizon of soil?

alukav5142 [94]

Im pretty sure the anservis a

7 0

3 years ago

Acetic acid (HC2H3O2, Ka=1.8x10^-5) is a weak acid. Calculate the pH of an aqueous solution of .25M acetic acid.

tensa zangetsu [6.8K]

Answer: The pH of an aqueous solution of .25M acetic acid is 2.7

Explanation:

$HC_2H_3O_2\rightarrow H^+C_2H_3O_2^-$

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= 0.25 M and $\alpha$ = ?

$K_a=1.8\times 10^{-5}$

Putting in the values we get:

$1.8\times 10^{-5}=\frac{(0.25\times \alpha)^2}{(0.25-0.25\times \alpha)}$

$(\alpha)=0.0084$

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

$[H^+]=0.25\times 0.0084=0.0021$

Also $pH=-log[H^+]$

$pH=-log[0.0021]=2.7$

Thus pH is 2.7

5 0

3 years ago