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3 years ago

The atomic radius of main group elements generally increases down a group because

1 answer:

8 0

The atomic radius of main group elements generally increases down a group because as there are more electrons they are farther away from the nucleus and the electrons closer to the nucleus shield the outer electrons from the protons for attraction.

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take a bucket and fill it with water put a lot of different thing in it make separate list of the articles which sinks in the wa

Lera25 [3.4K]

Explanation:

Things that float=paper,plastic bottle,rubber, polythene bag, balloon

Things that sinks =needle,stone,spoon,pen,soap

4 0

3 years ago

A student prepares a solution of sodium chloride by dissolving 116.9 g of NaCl into enough water to make 1.00 L of solution. How

zhenek [66]

Answer:

The accurate label for the solution is 2.00 mol/L NaCl.

Explanation:

Molrity = mass ÷ molar mass

Molar mass of NaCL = 58.44 g/mol

Weighed mass = 116.9g

⇒ Molarity of the solution = $\frac{116.9}{68.44}$ = 2.0M

Therefore, the accurate label for the solution is 2.00 mol/L NaCl.

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3 years ago

Ann and Jesse's mom is driving them to school. They are listening to music on an FM radio station. When they ride in the car wit

Svet_ta [14]

Answer: it they are both in the same place

Explanation:I don’t know and don’t care loser

3 0

3 years ago

How many grams of air are required to complete the combustion of 120 g of phosphorous to diphosphorous pentoxide, assuming the a

DiKsa [7]

Answer:

Explanation:

522 g

Explanation:

Your starting point here will be the balanced chemical equation for this combustion reaction

(s]

2(g]

→

5(s]

Notice that you have a

mole ratio between phosphorus and oxygen. This means that, regardless of how many moles of phosphorus you have, the reaction will always need

time more moles of oxygen gas.

Use phosphorus' molar mass to determine how many moles you have in that

93.0-g

sample

93.0

⋅

1mole P

30.974

3.0025 moles P

Use the aforementioned mole ratio to determine how many moles of oxygen you would need for many moles of phosphorus to completely take part in the reaction

3.0025

moles P

⋅

moles O

moles P

3.753 moles O

7 0

3 years ago

A 3.25 L solution is prepared by dissolving 285 g of BaBr2 in water. Determine the molarity.

Effectus [21]

Answer:

0.295 mol/L

Explanation:

Given data:

Volume of solution = 3.25 L

Mass of BaBr₂ = 285 g

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Number of moles of solute:

Number of moles = mass/ molar mass

Molar mass of BaBr₂ = 297.1 g/mol

Number of moles = 285 g/ 297.1 g/mol

Number of moles= 0.959 mol

Molarity:

M = 0.959 mol / 3.25 L

M = 0.295 mol/L

5 0

3 years ago