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2 years ago

Which items are directly related to radioactive decay

Chemistry

1 answer:

uranmaximum [27]2 years ago

3 0

E=mc^2 and mass defect

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7. If the pOH of an RbOH solution is 6.32, what is the concentration (molarity) of the base?

liubo4ka [24]

4.79 x 10⁻⁷moldm⁻³

Explanation:

Given parameters:

pOH of RbOH = 6.32

Unknown:

Molarity of the base = ?

Solution:

The pH or pOH scale is used for expressing the level of acidity alkalinity of aqueous solutions.

pOH = -log[OH⁻]

we know the pOH to be 6.32

6.32 = -log[OH⁻]

[OH⁻] = inverse log₁₀(6.32)

[OH⁻] = 4.79 x 10⁻⁷moldm⁻³

Learn more:

pH brainly.com/question/12985875

#learnwithBrainly

6 0

2 years ago

How much force is needed to accelerate a 1000-kg car at a rate of 3 m/s2? a 1003 N b 0.003 N c 3000 N d 333.3 N

Bogdan [553]

Answer:

Option c.

Explanation:

According to Newton's law, formula to solve this problem is:

F = m . a

Mass → 1000 kg

a → 3 m/s²

F = 1000 kg . 3m/s² → 3000 N

1 N = 1 kg . m/s² according to SI, Internation System of units.

7 0

2 years ago

How many molecules are their in o.5 mole of H2o

Black_prince [1.1K]

Answer:

There are 6.022x10^23 molecules

3 0

2 years ago

What is the concentration of OH − and pOH in a 0.00066 M solution of Ba ( OH ) 2 at 25 ∘ C? Assume complete dissociation.

Allushta [10]

Answer: The hydroxide ion concentration and pOH of the solution is $1.32\times 10^{-3}M$ and 2.88 respectively

Explanation:

We are given:

Concentration of barium hydroxide = 0.00066 M

The chemical equation for the dissociation of barium hydroxide follows:

$Ba(OH)_2\rightarrow Ba^{2+}+2OH^-$

1 mole of barium hydroxide produces 1 mole of barium ions and 2 moles of hydroxide ions

pOH is defined as the negative logarithm of hydroxide ion concentration present in the solution

To calculate pOH of the solution, we use the equation:

$pOH=-\log[OH^-]$

We are given:

$[OH^-]=(2\times 0.00066)=1.32\times 10^{-3}M$

Putting values in above equation, we get:

$pOH=-\log(1.32\times 10^{-3})\\\\pOH=2.88$

Hence, the hydroxide ion concentration and pOH of the solution is $1.32\times 10^{-3}M$ and 2.88 respectively

3 0

2 years ago

Which kind of reaction is shown below?

lisov135 [29]

Decomposition reaction.

3 0

2 years ago

Read 2 more answers