3 years ago

An _______ is a combination of substances that are combined physically but not mentally

Chemistry

1 answer:

goldenfox [79]3 years ago

5 0

A mixture is a combination of substances that are combined physcially but not mentally

You might be interested in

What is the ph of 0.450 m al(no3)3 [ka for al3+(aq) = 1.00x10-5]? express your answer to two decimal places?

White raven [17]

Answer : The pH of the solution is, 2.67

Explanation :

The equilibrium chemical reaction is:

$Al^{3+}+H_2O\rightarrow Al(OH)^{2+}+H^+$

Initial conc. 0.450 0 0

At eqm. (0.450-x) x x

As we are given:

$K_a=1.00\times 10^{-5}$

The expression for equilibrium constant is:

$K_a=\frac{(x)\times (x)}{(0.450-x)}$

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

$1.00\times 10^{-5}=\frac{(x)\times (x)}{(0.450-x)}$

$x=0.00212M$

The concentration of $H^+$ = x = 0.00212 M

Now we have to calculate the pH of solution.

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

$pH=-\log (0.00212)$

$pH=2.67$

Therefore, the pH of the solution is, 2.67

8 0

3 years ago

The arrows show the changes of state.

Romashka [77]

Answer:

condensation

Explanation:

when gases change to liqud it condenses.This occurs when the temperature is lowered

3 0

3 years ago

Probability is a number that describes how likely it is that a certain event will occu O True O False

lara31 [8.8K]

Answer:

Between 0 and 1

Explanation:

Hope this helps :)

6 0

3 years ago

The distance from the sun to earth would be ______.

Dvinal [7]

C- more than one light year or B-exactly one light year

8 0

2 years ago

Read 2 more answers

Which of the following equations can be used to calculate pOH?

Ivenika [448]

POH = 14 - pH
pOH = -log [OH-]

6 0

3 years ago