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andrey2020 [161]
3 years ago
8

Balance the following equation: (3pts) Al + HBr --> AlBr3 + H2

Chemistry
1 answer:
allsm [11]3 years ago
5 0

Answer:

2Al   +   6HBr    →   2AlBr₃   +   3H₂

Explanation:

2Al   +   6HBr    →   2AlBr₃   +   3H₂

2 Al in reactant side

2 Al in product side

6 Br in reactant side

6 (2x3) Br in reactant side

6 H in reactant side

6 H in product side (3x2)

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Determine the AMOUNT OF NO2, LIMITING REACTANT, AND THE AMOUNT AND NAME OF EXCESS REACTANT.
zepelin [54]

Answer:

balanced equation mole ratio 5 2 mol NO/1 mol O2

10.00 g O2 3 1 mol O2/32.00 g O2 5 0.3125 mol O2

20.00 g NO 3 1 mol NO/30.01 g NO 5 0.6664 mol NO

actual mole ratio 5 0.6664 mol NO/0.3125 mol O2 5 2.132 mol NO/1.000 mol O2

Because the actual mole ratio of NO:O2 is larger than the balanced equation mole

ratio of NO:O2, there is an excess of NO; O2 is the limiting reactant.

Mass of NO used 5 0.3125 mol O2 3 2 mol NO/1 mol O2 5 0.6250 mol NO

0.6250 mol NO 3 30.01 g NO/1 mol NO 5 18.76 g NO

Mass of NO2 produced 5 0.6250 mol NO2 3 46.01 g NO2/1 mol NO2 5 28.76 g NO2

Excess NO 5 20.00 g NO 2 18.76 g NO 5 1.24 g N

Explanation:

3 0
3 years ago
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marta [7]

Answer:

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Explanation:

5 0
3 years ago
Why is corn considered a material resource and an energy resource?
MakcuM [25]

Answer:

This is because Corn is grown on land and has important values to man .These values include as a source of food for man and animals. It is also used as raw materials for the production of certain goods such as flour etc.

It is an energy resource because fermentation of corn gives rise to ethanol fuel which is used as a source of power to run machines and other equipment.

3 0
3 years ago
different student is given a 10.0g sample labeled CaBr2 that may contain an inert (nonreacting) impurity. Identify a quantity fr
SCORPION-xisa [38]

Answer:density

Explanation:

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3 years ago
A copper rod that has a mass of 200.0 g has an initial temperature of 20.0°C and is heated to 40.0°C. If 1,540 J of heat are nee
almond37 [142]

Answer:

Specific heat of copper = 0.385 J/(gi°C)

Explanation:

Given:

Mass of copper (m) = 200 g =

Initial temperature (T1) = 20°C

Final temperature (T2) = 40°C

Heat needed (Q) = 1,540 J

Find:

Specific heat of copper = ?

Computation:

⇒ Change in temperature (ΔT) = T2 - T1

⇒ Change in temperature (ΔT) = 40°C - 20°C

⇒ Change in temperature (ΔT) = 20°C

⇒ Specific heat of copper = Q / [mΔT]

⇒ Specific heat of copper = 1,540 / [(200)(20)]

Specific heat of copper = 0.385 J/(gi°C)

5 0
3 years ago
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