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Finger [1]
3 years ago
7

Francium has the largest atomic radius. Why might this be?

Chemistry
1 answer:
Lerok [7]3 years ago
6 0
The answer is B
Basically the atomic radius increases when the energy levels and the groups increase .Having the most nuclear pull creates a force of attraction that pulls the electrons closer to the nucleus , resulting in a smaller atomic radius.
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What is the molarity of a 0.65L solution containing 63 grams of ? The molar mass of NaCl is 58.44 g/mol
ad-work [718]

Explanation:

The molarity of a solution is defined like the number of moles of solute per liters of solution.

molarity = moles of solute/(volume of solution in L)

We know the volume of solution in L.

volume of solution = 0.65 L

To go from the mass of our solute in grams to moles we have to use its molar mass.

mass of NaCl = 63 g

molar mass of NaCl = 58.44 g/mol

moles of NaCl = 63 g * 1 mol/(58.44 g)

moles of NaCl = 1.078 moles

Finally we can find the molarity of the solution

molarity = moles of NaCl/(volume of solution)

molarity = 1.078 moles/(0.65 L)

molarity = 1.66 M

Answer: the molarity of the solution is 1.66 M.

7 0
11 months ago
A student reduces the temperature of a 300 cm3 balloon from 60°c to 30°
FromTheMoon [43]

We can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

T1 / V1 = T2 / V2

V2 = T2 x V1 / T1

V2 = 303.15  x 300 / 333.15

<span>V2 = 272.99 cm³</span>

7 0
3 years ago
Which shows the correct order of stages of technological design?
romanna [79]

Answer:

The four stages of technological design include identifying a need, designing and implementing a solution, and evaluating the solution.

I don't know what the options are, cause you didn't show them but, hope this helped.

3 0
2 years ago
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The temperature reading of –14°C corresponds to a Kelvin reading of:
Sedaia [141]
The corrects answer is 259 K
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3 years ago
Any two functions of crystals<br>​
IRINA_888 [86]

Answer:

1. Participating in calcium homeostatis storage of calcium.

2. High capacity calcium (Ca) regulation and protection against herbivory

3 0
3 years ago
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