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3 years ago

How many hours of sunlight is the South Pole receiving during this time?

1 answer:

5 0

<span>Depends on the time of year.
Summer solstice = 0
Winter solstice = 24
Spring/fall equinox = 12

All other days, some gradual change from 0 to 24. This is true of any land within the Arctic or Antarctic circles (of course the times are reversed for the Arctic circle). Those circles are defined by the places on Earth that have at least one day of complete light and complete darkness during the year.</span>

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Type the correct answer in the box. Express your answer to two significant figures.

mash [69]

Answer: The percent yield of zinc carbonate is 5.91 %

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} ZnCO_3=\frac{12.6 g}{125.4g/mol}=0.100moles$

$ZnI_2$ is the limiting reagent as it limits the formation of product and $Na_2CO_3$ is the excess reagent.

$Na_2CO_3+ZnI_2\rightarrow 2NaI+ZnCO_3$

According to stoichiometry :

1 mole of produce = 1 mole of

Thus 1.7 moles of $ZnI_2$ will produce= $\frac{1}{1}\times 1.7=1.7moles$ of $ZnCO_3$

Theoretical yield of $ZnCO_3=moles\times {\text {Molar mass}}=1.7moles\times 125.4g/mol=213.2g$

percentage yield = $\frac{\text {Experimental yield}}{\text {Theoretical yield}}\times 100=\frac{12.6g}{213.2g}\times 100=5.91\%$

6 0

3 years ago

Read 2 more answers

When the n quantum number equals 1, we are in what orbital?

g100num [7]

Answer:

p orbital

Explanation:

8 0

3 years ago

According to the kinetic-molecular theory, what is one way the three states of matter are all similar?

Delicious77 [7]

The kinetic molecular theory of matter states that:

1. Matter is made up of particles that are constantly moving.

2. A change in phase may occur when the energy of the particles is changed.

3. All particles have energy, but the energy varies depending on the temperature the sample of matter is in. This in turn determines whether the substance exists in the solid, liquid, or gaseous state.

6 0

2 years ago

How many liters of carbon dioxide will 0.5 moles of lithium hydroxide (LiOH) absorb?

Elden [556K]

Answer : The volume of carbon dioxide will be, 5.6122 L

Solution : Given,

Moles of LiOH = 0.5 moles

Molar mass of carbon dioxide = 44 g/mole

Density of carbon dioxide = 0.00196 g/ml

First we have to calculate the mass of carbon dioxide.

The balanced reaction will be,

$2LiOH+CO_2\rightarrow Li_2CO_3+H_2O$