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erica [24]
3 years ago
5

A combination reaction occures when one element replaces another element in a compound during a chemical reaction

Chemistry
1 answer:
PIT_PIT [208]3 years ago
5 0
That is false.... I hope this is true or false
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What is the pressure of 4 moles of helium in a 50 L tank at 308k using PV=nRT
Ilya [14]

Hey there!:

p = ??

n = 4 moles

V = 50 L

T = 308 K

R =  0.082 atm

p*V = n * R * T

p * 50 = 4 * 0.082 * 308

p*50 = 101.024

p = 101.024 / 50

p = 2.020 atm


Hope that helps!


8 0
3 years ago
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What is the empirical formula for C14H28O7?​
mrs_skeptik [129]

Answer:

Empirical formula of C4H8O2, is the answer

Explanation:

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3 years ago
If an insect population increases and then decreases as the available supply of food changes, what does this demonstrate
Semenov [28]
D.

This is self-regulation because when the population of the insects becomes too large, it regulates itself and starts to decrease due to a shortage of resources.
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3 years ago
Which of the following is true for balancing equations?
nataly862011 [7]

Answer:

D) There must be equal number of atoms of each elements on both sides of equation.

Explanation:

The balancing equation must have equal number of atoms of each elements on both sides of equation.

The balance equation shoes mass is conserved thus followed the law of conservation of mas.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

8 0
2 years ago
Zinc + Hydrochloric Acid → Zinc Chloride and Hydrogen Gas
Kipish [7]

Explanation:

because in the right side there is 2 hydrogen( H) and 2 chloride (Cl) to balace them we have to replace 2.

3 0
3 years ago
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