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arlik [135]
3 years ago
10

When scientists say that a theory can never be proven , what are they actually saying?

Chemistry
2 answers:
katrin2010 [14]3 years ago
4 0
It is always possible for new data to contradict a theory.
svlad2 [7]3 years ago
4 0
They are saying that every theory can be changed by further research
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Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer indu
gayaneshka [121]

Answer:

42672 kJ

Explanation:

Chemical reaction:

C₂H₄ + H₂ → C₂H₆ + heat

Now we calculate the number of moles of ethane C₂H₆:

number of moles = mass / molecular weight

number of moles of ethane = 10.1 / 30 = 0.336 kmoles = 336 moles

And determine the heat released:

if      127 kJ are released when 1 mole of C₂H₆ is produced

then X kJ are released when 336 moles of C₂H₆ is produced

X = (127 × 336) / 1 = 42672 kJ

3 0
4 years ago
I need help with this question ASAP
aniked [119]
I think it's fertilisation (^^)
8 0
3 years ago
Examine the analogy and how it compares a part to a whole. Link : chain :: atom : _[blank]_​ what option best completes this ana
Rzqust [24]

A link is a part of a chain and an atom is a part of a molecule. It is also a part of a compound. Your answer should be molecule and/or compound

7 0
4 years ago
Read 2 more answers
When two substances react to form products, the reactant which is used up is called the ____.
Maksim231197 [3]
The reactant being used up is called limiting reagent as it limits the total amount of product produced.

if 4 units of HCL gives 2 units of Cl therefore
4:2
0.98:x
x=(0.98*2) /4
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3 0
4 years ago
a helium filled balloon has a volume of 208 l and it contains 9.95 moles of gas. if the pressure of the balloon is 1.26 atm dete
daser333 [38]
To determine the temperature of the gas, we need to assume ideal gas to use the equation PV=nRT where P represents the pressure, V is the volume, n is the number of moles, T is the temperature and R is the universal gas constant. We calculate as follows:

PV = nRT
T = PV / nR

T = (1.26 atm) ( 208 L ) / 0.08205 L-atm/mol-K ( 9.95 mol )
T = 321.02 K

Hope this answers the question.
8 0
4 years ago
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