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sweet-ann [11.9K]
3 years ago
7

What is the relatioship between atomic numbers and ionic radii of the elements in Group 1? what is the relationship between atom

ic numbers and first ionization energies? The following are the elements in the Group 1 in the periodic table Lithium, Sodium,Potassium, Cesiumand Rubidium
Chemistry
1 answer:
Sever21 [200]3 years ago
6 0
As atomic number increases atomic radii also increase down group 1. ionisation energy down group 1 will also decrease because as atomic radii gets bigger there is less electrostatic force between nuclei and electrons so less energy needed to remove valence electron.
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Which of the following statements is true about a hypothesis?
Tatiana [17]
A hypothesis is a prediction of what you believe to be true.
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3 years ago
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How many liters of 3.5 M solution can be made using 23 moles of LiBr *must show work to get credit*
MrMuchimi

<u>Answer:</u> 6.57 L of solution can be made.

<u>Explanation:</u>

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

\text{Molarity of solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (L)}} .....(1)

Given values:

Molarity of LiBr = 3.5 M

Moles of LiBr = 23 moles

Putting values in equation 1, we get:

3.5mol/L=\frac{23mol}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{23mol}{3.5mol/L}=6.57L

Hence, 6.57 L of solution can be made.

5 0
3 years ago
Which best describes a stock solution that is used in a dilution?
RSB [31]
A stock solution is a solution of a known concentration. Stock solution has a high concentration and therefore, the known amount of stock solution is used for preparing different concentrations, by diluting the same with the known amount of the solvent being used, such as water. 
6 0
3 years ago
HELP THIS IS FOR CHEM!! If the pull force is 898N and the friction force is 335N what is the net force?
Nezavi [6.7K]

Answer:

                                               

Explanation:

                         

                                 

                                             

3 0
3 years ago
What is Δn for the following equation in relating Kc to Kp?<br> 2 SO2(g) + O2(g) ⇌ 2 SO3(g)
swat32

Answer:

Δ N = -1

Explanation:

Step 1: Data given

2 SO2(g) + O2(g) ⇌ 2 SO3(g)

For 2 moles of SO2 we need 1 mol of O2 to produce 2 moles of SO3

Step 2: Calculate Δ

Δ N  wNill be the sum of moles of products minus the sum of moles of reactants.

Number of moles of products = number of moles of SO3 = 2

Number of moles of reactants = number of moles of SO2 + number of moles of O2 = 2 + 1 = 3

Δ N = 2 - 3 = -1

4 0
3 years ago
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