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3 years ago

A brick of salt has a volume of 50cm and a mass of 100 grams. What is its density?

Chemistry

1 answer:

fredd [130]3 years ago

8 0

Yo sup??

density=mass/volume

=100/50

=2 gm/cm³

Hope this helps

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2.55mol H2O. Good luck! :)

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What holds everything in place in the universe?

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Gravity

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Copper (II) oxide reacts with carbon to form Copper metal and carbon dioxide. If 365 grams of Copper (II) oxide were reacted wit

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3 years ago

A 100 W light bulb is placed in a cylinder equipped with a moveable piston. The light bulb is turned on for 2.0×10−2 hour, and t

drek231 [11]

Answer:

(a) ΔU = 7.2x10²

(b) W = -5.1x10²

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Explanation:

From the definition of power (p), we have:

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where, p: is power (J/s = W (watt)) W: is work = ΔU (J) and t: is time (s)

(a) We can calculate the energy (ΔU) using equation (1):

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(b) The work is related to pressure and volume by:

$\Delta W = -p \Delta V$

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(c) By the definition of Energy, we can calculate q:

$\Delta U = \Delta W + \Delta q$

where Δq: is the heat transfer

$\Delta q = \Delta U - \Delta W = 7.2 J - (-5.1 \cdot 10^{2} J) = 5.2 \cdot 10^{2} J$

I hope it helps you!

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4 years ago

how many grams of copper are required to replace 4.00 grams of silver nitrate which are dissolved in water

lions [1.4K]

Cu(s) + 2 AgNO3 = Cu(NO3)2 + 2 Ag 63.5 g Cu ---------------- 2 x 169.87 g AgNO3 ( mass Cu ?) -------------- 4.00 g AgNO3 mass Cu = 4.00 x 63.5 / 2 x 169.87 mass Cu = 254 / 339.74 = 0.747 g of Cu

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3 years ago

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