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2 years ago

Which of these choices is a benefit of international trade?

Chemistry

1 answer:

Inessa [10]2 years ago

4 0

Fewer option for consumers

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a carbohydrate is called an organic compound because it contains a) phosphorus b) carbon c) hydrogen d) oxygen

artcher [175]

Organic chemistry is all about CARBON!!!!!!

3 0

3 years ago

What mass of cu(s)cu(s) is electroplated by running 14. 5 aa of current through a cu2 (aq)cu2 (aq) solution for 4. 00 hh?

galina1969 [7]

The mass of Copper electroplated is 68.76 g

<h3>What is electroplating?</h3>

The process of plating a metal onto another is known as electroplating.

It is often used to prevent corrosion of metal or for the decorative purposes

In this process, electric current is passed through an aqueous solution containing dissolved cations.

The dissolved cations are reduced developing a thin metal coating on the electrode.

At cathode,

$Cu^{2+}(aq) + 2e^-\rightarrow Cu(s)$

Current, I = 14.5 A

Time, t = 4 hrs = 4×60×60 = 14400 sec

Charge, q = It = 14.5×14400= 208800 C

Copper metal deposited by 2×96487 C = 63.55 g

Copper metal deposited by 208800 C = $\frac{63.55 \times208800}{2\times96487}$

= 68.76g

Hence, The mass of Copper electroplated is 68.76 g

Learn more about electroplating:

brainly.com/question/22104403

#SPJ4

4 0

1 year ago

Read 2 more answers

8)<br> As the skydiver falls to Earth, she experiences positive acceleration due to

Lapatulllka [165]

Answer:

Excitement.

Explanation:

7 0

2 years ago

How many atoms are there in 4 moles of table sugar ?

Likurg_2 [28]

Answer: 2.408×10^24 atoms

Explanation:

Applying the formula

No. moles= (no. Of atoms)/Avogadro's number

4 = n/6.02×10^23

no. of atoms= 2.408×10^24 atoms

7 0

3 years ago

5.00 g of carbon were adiabatically burned to CO2 in a 2.00 kg copper calorimeter which contained 2.50 kg of water. The temperat

lorasvet [3.4K]

Answer:

A. -163.96kJ

B. -158.34kJ

Explanation:

Heat of combustion is the heat released when an element with oxygen at stp.

Reaction for the combustion of carbon:

C(s) + O2(g) --> CO2(g)

Enthalpy heat of combustion, C (using Hess law) = -393.5 kJ/mol

m = 5g

Molecular weight = 12 g/mol

No of moles = mass/molecular weight

= 5/12

= 0.417mol

DH = -393.5 * 0.417

= -163.96 kJ

B. Heat absorbed by the calorimeter = heat evolve by combustion

= mCH2ODT + mCcDT

Where CH2O is the specific heat capacity of the water in the calorimeter

Cc is the specific heat capacity of copper calorimeter

= (2500*4.184*14.1) + (2000*0.385*14.1)

= -158343J

= -158.34kJ

3 0

2 years ago