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uysha [10]
4 years ago
9

In a lab about the activity series, a solution of copper(II)chloride is placed in a test tube with zinc metal. If zinc is higher

up on the activity series, it will produce a reaction and replace the copper. Bits of copper are seen in the bottom of the test tube. A good conclusion would be?
Chemistry
1 answer:
Rus_ich [418]4 years ago
3 0

Answer:

A simple displacement reaction is carried out.

Explanation:

Hello,

The statement suggest the following chemical reaction, that is carried out under the conditions it is describing:

CuCl_2(aq)+Zn(s) --> ZnCl_2(aq)+Cu(s)

Now, the bits of copper are formed due the cation displacement that is carried out when Cu(II) cations are exchanged by Zn(II) cations by cause of the chemical reaction, so the Cu stops acting as a cation and comes back to its metallic form.

Best regards.

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The exhaust gas from an automobile contains 1.5 percent by volume of carbon monoxide. What is the concentration of CO in mg/m' a
FrozenT [24]

Answer:

(a) 17,178 mg/m3

(b) 11,625 mg/m3

Explanation:

The concentration of CO in mg/m3 can be calculated as

C (mg/m3) =(P/RT)*MW*C_{ppm}

For standard conditions (1 atm and 25°C), P/RT is 0.0409.

Concentration of 1.5% percent by volume of CO is equivalent to 1.5*10,000 ppm= 15,000 ppm CO.

The molecular weigth of CO is 28 g/mol.

(1) For 25°C and 1 atm conditions

C=(P/RT)*MW*C_{ppm}\\\\C=0.0409*28*15,000=17,178

(b) For 200°C and 1.1 atm,

P/RT=0.0409*(P/P_{std})*(T_{std}/T)\\P/RT=0.0409*(1.1atm/1atm)*(273+15K/273+200K)=0.0277

Then the concentration in mg/m3 is

C=(P/RT)*MW*C_{ppm}\\\\C=0.0277*28*15,000=11,625

5 0
3 years ago
A sample of gas at 1.0 atm pressure has a volume of 20.0 L. If the
wariber [46]

Answer:

New volume = 8.00 Liters

Explanation:

Boyles Law => P₁V₁ = P₂V₂

P₁ = 1.0 Atm

V₁ = 20.0 L

P₂ = 2.5 Atm

V₂ = ?

P₁V₁ = P₂V₂ = V₂ = V₁(P₁/P₂) = 20.0L(1.0Atm/2.5Atm) = 8.00L

5 0
3 years ago
Which of the following properties of water allows an insect to “walk on water”?
zepelin [54]

Answer:

B) Cohesion

Explanation:

The water molecules are more attracted to themselves than with air molecules. Droplets will cling to the body of water due to cohesion.

6 0
4 years ago
Read 2 more answers
How many molecules of glucose are in 5. 72 grams of glucose c6h12o6?.
liq [111]

Answer:

5.72 g ( 1 mol / 180.16 g ) (  6.022 x 10^23 molecules / mole ) = 1.90x10^23 molecules

4 0
2 years ago
Which area should have the lowest temperatures?<br><br> A. 1<br><br> B.2 <br><br> C.3 <br><br> D.4
pochemuha

Answer:

A. 1

Explanation:

The higher you get in the atmosphere the cooler the temperature will be. The reason it's actually colder is because, as you go up in the atmosphere, the Earth's atmosphere feels less pressure the higher up you go. So as the gas in the atmosphere rises it feels less pressure, which makes it expand.

Hope this Help :)

Please mark brainliest :D

7 0
3 years ago
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