2 years ago

What is an example of a precipitation reaction and addition reaction?

Chemistry

1 answer:

dsp732 years ago

6 0

Rain is produced my clouds there

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In an experiment Nyla collected the following information about a solution made from a certain food:

lorasvet [3.4K]

Answer:

Explanation:

pH<7

so it must be acid

easy ;)

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3 years ago

A chemist needs 40.0 g of concentrated sulfuric acid for an experiment. the density of concentrated sulfuric acid at room temper

STALIN [3.7K]

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3 years ago

Which process is an example of a chemical change? drying clothes in the dryer heating a cup of tea chopping a tree activating a

coldgirl [10]

Answer:

Activating a glow stick is the example of a chemical change, as snapping one will cause a chemical reaction, causing the glow. All of the other options are physical changes because nothing new is formed. Hope this helps!

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2 years ago

A materials scientist has created an alloy containing aluminum, copper, and zinc, and wants to determine the percent composition

liubo4ka [24]

Answer:

0.8749 grams of hydrogen gas was formed from the reaction.

Explanation:

P = Pressure of hydrogen gad= 744 Torr = 0.98 atm

(1 atm = 760 Torr)

V = Volume of hydrogen gas= 11 L

n = number of moles of hydrogen gas= ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of vapor = 27.0 °C = 300.15 K

Putting values in above equation, we get:

Using an ideal gas equation:

$PV=nRT$

$n=\frac{PV}{RT}=\frac{0.98 atm\times 11 L}{0.0821 L atm/mol K\times 300.15 K}$

n = 0.4374 moles

Mass of 0.4374 moles of hydrogen gas:

0.4374 mol × 2 g/mol = 0.8749 g

0.8749 grams of hydrogen gas was formed from the reaction.

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3 years ago

Exposure to what type of radiant energy is sensed by human skin as warmth?

larisa86 [58]

The answer is C.gamma rays

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2 years ago

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