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3 years ago

A substance that readily burns when it comes into contact with a flame has the chemical property of _____.

2 answers:

8 0

A substance that readily burns when it comes into contact with a flame has the chemical property of reactivity. The answer is letter C. Reactivity is a chemical property of a substance. According to EPA regulations, it is normally unstable and readily undergoes violent change without detonating. it can explode or violently react when exposed to water, when heated, or under STP.

taurus [48]3 years ago

5 0

a bc its the chemical reacting

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Find the number of moles that are in 2.23 g of Li 2 O and report it with the correct significant figures.

Lesechka [4]

Not sure about the number of significant figures; you can decide where to round, but I would probably say 0.075mol.

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3 years ago

How many moles of co2 are produced when 5.40 mol of ethane are burned in an excess of oxygen?

Nimfa-mama [501]

<span>Reaction of ethane combustion:

2C2H6 (g) + 7O2 (g) ----> 4CO2 (g) + 6H2O

According to the reaction, we can see that </span>C2H6 and CO2 have following stoichiometric ratio:

n(C2H6) : n(CO2) = 2 : 4

If we know the number of moles of ethane we can calculate moles of carbon dioxide:

2 x n(CO2) = 4 x n(C2H6)

n(CO2) = 2 x n(C2H6)

n(CO2) = 2 x 5.4 = 10.8 mole of CO2 <span>are produced</span>

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4 years ago

Which layer of the atmosphere is between the stratosphere and the thermosphere

Drupady [299]

Mesosphere is what is in between

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3 years ago

Read 2 more answers

What factors do you think should be considered in selecting a metal to use to reclaim copper? Which factor do you think is the m

Lana71 [14]

Answer:

Aluminum

Explanation:

<h3> <em>Aluminum would be the best choice to reuse copper from the copper chloride solution because it In the aluminum–copper reaction, the chloride ions help remove the aluminum oxide coating so that a reaction can take place through the oxidation of aluminum and the reduction of copper ions.The aluminum–copper chloride reaction is a simplified version of a waste reclamation and reduction strategy for handling toxic-waste materials. </em></h3>

7 0

3 years ago

1. A sample of aluminum absorbs 50.1 J of heat, upon which the temperature of the sample increases from 20.0°C to 35.5°C. If the

Maurinko [17]

Answer:

Mass of aluminium in sample = 3.591 g ≅ 3.6 grams

Explanation:

Given that, A sample of aluminum absorbs 50.1 J of heat, upon which the temperature of the sample increases from 20.0°C to 35.5°C.

the specific heat of aluminum is 0.900 J/g- °C

The relation between heat absorbed and change in temperature is given by, Q = msΔT.

where Q = heat absorbed

m = mass of the substance

s = specific heat of substance

ΔT = change in temperature

Now, in our case, Q = 50.1 J ; s = 0.900 J/g- °C; ΔT= 35.5-20 = 15.5°C

⇒ m = $\frac{Q}{s(T_{2} -T_{1}) }$

⇒ m = $\frac{50.1}{0.900(15.5)}$ = 3.591 g ≅ 3.6 g

⇒ m ≅ 3.6 g

5 0

3 years ago