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erik [133]
3 years ago
15

The man is being warmed by?radiationconventionconduction​

Chemistry
1 answer:
Lubov Fominskaja [6]3 years ago
6 0

Answer:

Comvection

Explanation:

The movement causes the density to rise and therefore transfer more heat

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Lead(II) chromate, PbCrO4, is a yellow paint pigment (called chrome yellow) prepared by a precipitation reaction. In a preparati
Roman55 [17]

Answer:

n = 0.1624 moles

Explanation:

n=\frac{m}{M} \\n=\frac{52.5}{323.1937} \\n= 0.1624 mol

8 0
2 years ago
You have 50 L of CO2 gas at standard temperature and pressure (STP). What would need to be done to the pressure to cut the volum
neonofarm [45]

Answer:

what is this

Explanation:

4 0
3 years ago
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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
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What are the major organic products are formed when the following compounds react with methylmagnesium bromide (CH3MgBr), follow
Sliva [168]

Answer:

Major organic products are- (a) propan-1-ol and (b) 2-methylpropan-2-ol

Explanation:

methyl magnesium bromide gives nucleophilic addition reaction with carbonyl group. Because methyl magnesium bromide is a strong nucleophile and carbonyl group is a strong electrophilic center.

Propanal contains an aldehyde group and propanone contains a ketone group. hence they both give nucleophilic addition with methyl magnesium bromide.

Dilute acid is added to protonate the alkoxide produced during nucleophilic addition.

Reactions are shown below.

6 0
3 years ago
Zinc reacts with hydrochloric acid according to the reaction equation Zn ( s ) + 2 HCl ( aq ) ⟶ ZnCl 2 ( aq ) + H 2 ( g ) How ma
REY [17]

Answer:

34.7mL

Explanation:

First we have to convert our grams of Zinc to moles of zinc so we can relate that number to our chemical equation.

So: 6.25g Zn x (1 mol / 65.39 g) = 0.0956 mol Zn

All that was done above was multiplying the grams of zinc by the reciprocal of zincs molar mass so our units would cancel and leave us with moles of zinc.

So now we need to go to HCl!

To do that we multiply by the molar coefficients in the chemical equation:

\frac{0.0956g Zn}{1 } (\frac{2 mol HCl}{1molZn})

This leaves us with 2(0.0956) = 0.1912 mol HCl

Now we use the relationship M= moles / volume , to calculate our volume

Rearranging we get that V = moles / M

Now we plug in: V = 0.1912 mol HCl / 5.50 M HCl

V= 0.0347 L

To change this to milliliters we multiply by 1000 so:

34.7 mL

7 0
4 years ago
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