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2 years ago

Given an acidic solution with a pH of 4.5, what is pOH of the same solution?

Chemistry

1 answer:

Crazy boy [7]2 years ago

8 0

Answer: Option C) 9.5

Explanation:

Given that,

pOH of solution = ?

pH of solution = 4.5 (it is an acidic solution because any pH values less than 7.0 is said to be acidic)

Recall that pH is the negative logarithm of hydrogen ion concentration in the solution while pOH is the negative logarithm of hydroxide ion concentration in the solution.

Hence, pH + pOH = 14

4.5 + pOH = 14

pOH = 14 - 4.5

pOH = 9.5

Thus, the pOH of the same solution is 9.5

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What are four main types of fresh water ecosystems

saw5 [17]

Answer:

streams and rivers

ponds and lakes

wetlands

ocean gulf of Mexico

hope it helped

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2 years ago

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The number of atoms in 5.78 mol NH4NO3. Show your work.

IRINA_888 [86]

Answer:

3.481 x 10²⁴ atoms

Explanation:

Data Given:

Number of moles of NH₄NO₃ = 5.78 mol

Number of atoms of NH₄NO₃ = ?

Solution:

Formula used

no. of moles = no. of atoms / Avogadro's number

As we have to find no. of atoms

So, we have to rearrange the above equation

no. of atoms = no. of moles x Avogadro's number . . . . . (1)

Where

Avogadro's number = 6.022 x 10²³ atoms

Put values in above Equation 1

no. of atoms = 5.78 mol x 6.022 x 10²³ atoms/mol

no. of atoms = 3.481 x 10²⁴ mol

So,

no. of atoms in 5.78 mole NH₄NO₃ = 3.481 x 10²⁴ atoms

6 0

2 years ago

Read 2 more answers

A container with a temperature T1 of 15°C is submerged in a bucket of hot water with a temperature T2 of 37°C. An identical cont

n200080 [17]

Answer:

d. T1 = 7°C; T2 = 29°C

Explanation:

The temperature of a substance is a measure of the average kinetic energy of is particle: in fact, the two quantities are proportional to each other.

Moreover, heat is always transferred spontaneously from a hotter object (higher temperature) to a colder object (lower temperature).

In this problem, we have a container placed in contact with a bucket of hot water: heat flows from the hot water to the container, until the two are at the same temperature.

The amount of energy transferred between the two is proportional to the initial temperature difference between the container and the water:

$Q\propto \Delta T$

Since in the two situations the amount of energy transferred is the same, then it means that the temperature difference between the two substances is the same in the two situations. So we can write:

$T_2-T_1=37^{\circ}-15^{\circ}=22^{\circ}$

And from the choices given, we see that the only option that satisfies this condition is

$T_1=7^{\circ}C, T_2=29^{\circ}C$

7 0

2 years ago

PLEASEEE PLEASEEE HELP

kati45 [8]

Answer:

= 49.674 g NaCl

Explanation:

From the equation;

1 mole of Sodium metal produces 2 moles sodium chloride

This means;

23 g of Na will produce 116.88 g of NaCl

Therefore;

11.5 g will generate;

= (11.5 × 116.88)/23

= 58.44 g of NaCl

But;

Percentage yield = (Actual yield/Theoretical yield)× 100%

85 /100 = Actual yield /58.44 g

Thus;

Actual yield = 0.85 × 58.44

= 49.674 g NaCl

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2 years ago

Is c7h16+o2→co2+8h2o+7co2 a balanced equation

erik [133]

<span>C7H16 + 11 O2 = 7 CO2 + 8 H2O

If you write it like this then it is balanced.</span>

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2 years ago