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Fynjy0 [20]
3 years ago
8

A 44.8 g rhodium sample contains how many rhodium atoms

Chemistry
1 answer:
Tresset [83]3 years ago
6 0

Answer:

2.63*10^23

Explanation:

1 mol rhodium = 102.91

44.8g/1 mol * 1 mol/ 102.91mol * 6.022*10^23/1 mol =

2.63*10^23

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Hi, May I have Chem help please? Please Keep the answer as simple as possible because it is a for a bcr.
finlep [7]

Proton:

Mass = 1

Charge = +1

Location = Nucleus

Neutron:

Mass = 1

Charge = 0

Location = Nucleus

Electron:

Mass = 1/2000

Charge = -1

Location = Energy levels

6 0
2 years ago
Factors that limit a technological design are called constrains. But why?
noname [10]

The factors that limit a technological design can be physical and social. The physical limitations are constraints due to nature itself. They  include natural laws and properties of materials.

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3 0
3 years ago
When 47.2 J of heat is added to 13.4 g of a liquid, its
leva [86]

Answer: 2.02 J/g°C

Explanation:

To find the heat capacity, we have to manipulate the equation for heat.

q=mCΔT becomes C=q/(mΔT) to find heat capacity. Since we are given our values, we can plug in to find C.

C=\frac{47.2J}{13.4g*1.74°C}

*Please ignore the capital A in front of the °C. In order to have ° in the equaiton, the A pops up.

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8 0
2 years ago
URGENT!!!!!!
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Answer:

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4 0
3 years ago
A cylinder with a moving piston expands from an initial volume of 0.350 L against an external pressure of 1.90 atm. The expansio
myrzilka [38]

Answer:

1.84 L

Explanation:

Using the equation for reversible work:

W = -P*(V_{2} - V_{1})

Where:

W is the work done (J) = -287 J.

Since the gas did work, therefore W is negative.

P is the pressure in atm = 1.90 atm.

However, work done is in joules and pressure is in atm. We can use the values of universal gas constant as a convenient conversion unit. R = 8.314 J/(mol*K);  R = 0.0821 (L*atm)/(mol*K)

Therefore, the conversion unit is 0.0821/8.314 = 0.00987 (L*atm)/J

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V_{2} is the final volume = ?

Thus:

(-287 J)*0.00987 (L*atm)/J = -1.9 atm*(V_{2} - 0.350) L

V_{2} = [(287*0.00987)+(1.9*0.350)]/1.9 = (2.833+0.665)/1.9 =1.84 L

7 0
3 years ago
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