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3 years ago

9

What is used to find pH of a solution?

2 answers:

Paha777 [63]3 years ago

8 0

PH solution is used to find pH of certain solution

sergey [27]3 years ago

7 0

To calculate the pH of a aqueous solution, you need to know the concentration of the hydronium ion in moles per liter. The pH is then calculated using the expression: pH=-log [H30+]

Hope this helps.

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Differentiate between loadstone and bar magnet

MakcuM [25]

As nouns the difference between magnet and lodestone

is that magnet is a piece of material that attracts some metals by magnetism while lodestone is a naturally occurring magnet.

7 0

2 years ago

An electrical appliance draws 9.0 amperes of current when connected to a 120-volt

Lemur [1.5K]

Answer:

The correct answer is "1080 W".

Explanation:

Given:

Current,

I = 9.0 A

Potential difference,

V = 120 volt

As we know,

⇒ $Power=IV$

On substituting the values, we get

⇒ $=120\times 9.0$

⇒ $=1080 \ W$

4 0

3 years ago

A golf ball has a mass of 120g. Calculate its increase in mass when it is travelling at 40ms1. What is this as a percentage of i

kicyunya [14]

Answer:

$Percentage=8.889\times 10^{-13}$ %

Explanation:

From special theory of relativity the dynamic mass m is related with the rest mass $m_{0}$ of the body as

$m=\frac{m_{0} }{\sqrt{1-\frac{v^{2} }{c^{2} } } }$

Here, c is the speed of light and v is the velocity of object.

Given mass of the golf ball is 120 g.

$m=\frac{120 }{\sqrt{1-\frac{(40)^{2} }{(3\times 10^{8} )^{2} } } }\\m=120(1-\frac{(40)^{2} }{(3\times 10^{8}) ^{2} })^{-\frac{1}{2} } \\$

Now applying the binomial theorem and solve the above equation.

$m=(1+\frac{1}{2}(\frac{40}{3\times 10^{8} }) ^{2} )\\m=120(1+8.889\times 10^{-15})$

Therefore, increase in mass is,

$\Delta m=120\times 8.889\times 10^{-15} \\\Delta m=10.6668\times 10^{-13} g$

Now percentage of increase in mass with rest mass is,

$Percentage=\frac{10.6668\times 10^{-13} g}{120g} \times 100\\Percentage=8.889\times 10^{-13}$

Therefore, the percentage of increase in mass with rest mass is $Percentage=8.889\times 10^{-13}$ .

4 0

4 years ago

As a result of mitosis, the cels of a Molecular organism sure which of these properties select to correct answers. A. All cells

KATRIN_1 [288]

Answer:

C. All cells have identical genetic information.

4 0

3 years ago

Read 2 more answers

Why do people eat vegetables? Not just to stay healthy!!! But why else do we eat and need vegetables?

SVETLANKA909090 [29]

Answer:

Other reasons people eat vegetables are to get strong and get muscles, abs and I guess that people eat them because they taste good.

Explanation:

3 0

3 years ago