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Wittaler [7]
3 years ago
13

Which of the following statements holds true for a chemical change?

Chemistry
1 answer:
elena-14-01-66 [18.8K]3 years ago
6 0
Where are the statements there are none 

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C₂H₄ + 3O₂ → 2CO₂ + 2H₂O If you start with 45.9 g of C₂H₄, and excess O₂, what mass of CO₂ will be produced?
hoa [83]

The mass of CO2 that would be produced is 144.03 g

From the equation of the reaction, the mole ratio of C2H4 input to CO2 produced is 1:2.

Recall that: mole = mass/molar mass

mole of 45.9 g C2H4 = 45.9/28.05

                                     = 1.6364 moles

Thus: equivalent moles of CO2 = 1.6364 x 2

                                                        = 3.2727 moles

Mass of 3.2727 moles of CO2 = moles x molar mass

                                                = 3.2727 x 44.01

                                                  = 144.03 g

More on stoichiometric calculations can be found here: brainly.com/question/8062886?referrer=searchResults

6 0
3 years ago
An (blank) determines what will be tested in a scientific experiment
elixir [45]
The answer would be hypotheis since its an theory that isnt proven yet which would involve a scientist to expertiment to make the hypothesis true or valid
6 0
4 years ago
Why do you cool down tea extract in ice to below 40°c before adding dichloromethane?
jeyben [28]
For drinking because it’s much cold
5 0
4 years ago
Lithium is a metal.
Zina [86]

Answer:

Explanation:

lithium: lithium is very soft, silvery metal. melting point is 180.54°C and boiling point is 1,335°C. it's density is 0.534 grams per cu.cm. oxygen: oxygen is colourless , odorless , tasteless gas

8 0
3 years ago
For the readion 2Na + Ch> 2NaCl, how many grams of Ch are required to read completely with 450 g Na
just olya [345]
I think it might be 3.54g
3 0
3 years ago
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