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Anni [7]
3 years ago
13

The density of a gas cannot be measured. True False

Chemistry
1 answer:
likoan [24]3 years ago
7 0

Answer:

False

Explanation:

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You are running a rather large scale reaction where you prepare the grignard reagent phenylmagnesium bromide by reacting 210.14
almond37 [142]

Answer:

We would expect to form 7.35 moles of grignard reagent.

Explanation:

<u>Step 1: </u>Data given

Mass of magnesium = 210.14 grams

Volume bromobenzene = 772 mL

Density of bromobenzene = 1.495 g/mL

Molar mass of Mg = 24.3 g/mol

Molar mass of bromobenzene = 157.01 g/mol

<u>Step 2</u>: The balanced equation

C6H5Br + Mg ⇒ C6H5MgBr

<u>Step 3:</u> Calculate mass of bromobenzene

Mass bromobenzene = density bromobenzene * volume

Mass bromobenzene = 1.495 g/mL * 772 mL

Mass bromobenzene = 1154.14 grams

<u>Step 4</u>: Calculate number of moles bromobenzene

Moles bromobenzene = mass bromobenzene / molar mass bromobenzene

Moles bromobenzene = 1154.14g / 157.01 g/mol

Moles bromobenzene = 7.35 moles

<u>Step 5:</u> Calculate moles of Mg

Moles Mg = 210.14 grams /24.3 g/mol

Moles Mg = 8.65 moles

<u>Step 6:</u> The limiting reactant

The mole ratio is 1:1 So the bromobenzene has the smallest amount of moles, so it's the limiting reactant. It will be completely consumed ( 7.35 moles). Magnesium is in excess, There will react 7.35 moles. There will remain 8.65 - 7.35 = 1.30 moles

<u>Step 7:</u> Calculate moles of phenylmagnesium bromide

For 1 mole of bromobenzene, we need 1 mole of Mg to produce 1 mole of phenylmagnesium bromide

For 7.35 moles bromobenzene, we have 7.35 moles phenylmagnesium bromide

We would expect to form 7.35 moles of grignard reagent.

5 0
3 years ago
Consider the four free body diagrams. Free-body diagrams are diagrams used to show the relative magnitude and direction of all f
9966 [12]
If you look closely at each of the four diagrams you would be able to conclude that

<span>D) 
Yes. In B and D. In both cases, there is a net force. 
In B, there is a net force to the left; in D there is a net force upward.

In A and C, the forces are in equilibrium both in the horizontal and vertical direction.</span>
5 0
3 years ago
Read 2 more answers
why is a molecule of CO2 non polar even though the bonds between the carbon atom and the oxygen atoms are polar
stira [4]

Answer:

m

Explanation:

m

5 0
2 years ago
What property of metals is reactivity
nata0808 [166]
The reactivity of a metal is determined by these things.
Firstly, the number of electrons in the outer shell; the fewer the number of electrons in the outer shell, the more reactive the metal.
The number of electron shells also affects reactivity, the more electron shells there are, the more reactive the metal.
7 0
3 years ago
Read 2 more answers
In multicellular organismscells that become specialized to perform a specific function are called?
Zolol [24]
The cell proliferates to produce many cells that result in multicellar organism.

answer
8 0
2 years ago
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