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PtichkaEL [24]
3 years ago
10

The number of hydrogen ions would equal the number of hydroxide ions in a solution with a pH of what?

Chemistry
1 answer:
Dafna1 [17]3 years ago
6 0

Seven. It's a neutral pH.

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Why are most household items made up of oxygen?
Alchen [17]
It is in our atmosphere
5 0
3 years ago
A mixture of water and acetone at 756 mm boils at 70.0°C. The vapor pressure of acetone is
Tatiana [17]

Given :

A mixture of water and acetone at 756 mm boils at 70.0°C.

The vapor pressure of acetone is  1.54 atm at 70.0°C, while the vapor pressure of water is 0.312 atm at the same temperature.

To Find :

The percentage composition of the mixture.

Solution :

By Raoult's law :

P=x_{acetone}P^o_{acetone}+x_{water}P^o_{water}\\\\x_{acetone}1.58+x_{water}0.312=\dfrac{756}{760}=0.995\ atm\\\\1.58x_a+0.312x_w=0.995......( 1 )

Also , x_a+x_b=1      ......( 2 )

Solving equation 1 and 2 , we get :

x_a=0.54\ and \ x_w=0.46 .

Mass of acetone ,

m_a=x_a\times MM_a\\\\m_a=0.54\times 58\\\\m_a=31.32\ g

Mass of water ,

m_w=x_w\times MM_w\\\\m_w=0.46\times 18\\\\m_a=8.28\ g

\%water =\dfrac{8.28}{8.28+31.32}\times 100\\\\\%water =20.9\%\\\\\%acetone =79.1\%

Hence , this is the required solution.

6 0
3 years ago
Write a net ionic equation for the reaction that occurs when aqueous solutions of nitric acid and sodium hydroxide are combined.
Veronika [31]

Answer:

H^+(aq) +  OH^-(aq) -------> H2O(l)

Explanation:

We must first write the molecular reaction equation as follows;

HNO3(aq) + NaOH(aq) ------>NaNO3(aq) + H2O(l)

The complete ionic equation is;

H^+(aq) + NO3^-(aq) + Na^+(aq) + OH^-(aq) -------> Na^+(aq) + NO3^-(aq) + H2O(l)

The net ionic equation therefore is;

H^+(aq) +  OH^-(aq) -------> H2O(l)

5 0
3 years ago
What happens to the speed of an object when dropped at free fall?
Liono4ka [1.6K]
 <span>Therefore, the rotation of the </span>object<span> "</span>speeds<span> up" as it </span>falls. Therefore, it rotates "<span>faster" than the Earth under it, and so it </span>falls<span> slightly to the east.</span>
7 0
3 years ago
How much pure antifreeze must be added to 8 gallons of 10% antifreeze to make a 50% antifreeze solution?
QveST [7]

<u>Answer:</u> The amount of pure antifreeze that must be added is 6.4 gallons

<u>Explanation:</u>

We are given:

Percent of antifreeze given = 10 %

Amount of solution = 8 gallons

Let the amount of pure antifreeze be 'x'

Calculating the amount of pure antifreeze:

0.1=\frac{x}{8}\\\\x=(0.1\times 8)=0.8

Let the amount of pure antifreeze added in the solution be 'y'

Percent of solution to be made = 50 %

So,

0.5=\frac{0.8+y}{8+y}\\\\0.5(8+y)=(0.8+y)\\\\y=6.4

Hence, the amount of pure antifreeze that must be added is 6.4 gallons

5 0
3 years ago
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