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labwork [276]
3 years ago
11

How many moles are in 264 g of gold, Au?1 point​

Chemistry
2 answers:
lbvjy [14]3 years ago
8 0

Answer: n = 1.34 moles Au

Explanation: For 1 mole of Au it is equal to its molar mass.

264 g Au x 1 mole Au / 197 g Au

= 1.34 moles Au

Cancel out the units of mass which is g and the remaining unit is in moles.

Brut [27]3 years ago
5 0

Answer: 1/2

Explanation:

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Butane (C4H10) is used as a fuel where natural gas is not available. How many grams of butane will fill a 3.50-liter container a
erik [133]
<span>We use the formula PV = nRT. P = 758 torr = 0.997 atm. V = 3.50 L. T = 35.6 C = 308.15 K. R = 0.0821. Rearranging the equation gives up n = PV/Rt and we get .0138 moles of butane. Mass of 0.0138 moles of butane = .0138 x 58.12 = 8.02g.</span>
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3 years ago
Some water released 7800 J of energy when cooled from 78°C to 33°C. What was the mass of the water?
Karo-lina-s [1.5K]

Answer:

-41. 47

Explanation:

m = q / Cp x T

m = Mass

q = Energy (or joules)

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T = Change in Temperature

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This is the formula you'll need for change in temperature:

Final - Initial

So, 33 - 78 = -45

m = 7800 / 4.18 x -45

= -41.47

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2 years ago
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3 years ago
"the order-of-magnitude of the diameter of an" atom is closest to
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5 0
3 years ago
Single and double replacement reactions practice WS CuCl2 +<br> F2 »<br> CuF2<br> +<br> Cl2
Lapatulllka [165]
CuCl2+F2—>CuF2+Cl2.
This is a single replacement because there is one compound and one element. Picture Cu as ‘A’ Cl2 as ‘B’ and F2 as ‘C.’ So AB+C—>AC+B. A and B “broke up” and that resulted to A going with C to create the compound CuF2 leaving Cl2 alone.
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