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stiv31 [10]
3 years ago
14

What is the fourth most abundant element in the universe in terms of mass?

Chemistry
2 answers:
Romashka-Z-Leto [24]3 years ago
8 0
The fourth most abundant element in the universe in terms of mass would be Carbon.

The first is Hydrogen, the second is Helium, and the third is oxygen.
iren [92.7K]3 years ago
4 0
The fourth most abundant element in terms of mass is Carbon.

The first, second, and third most abundant element in terms of mass are Hydrogen, Helium, and Oxygen, respectively.

Hope this helps~
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What is the point of an object where the force of gravity is considered to act?
svetlana [45]

Answer:

Center of gravity

Explanation:

Gravity always acts downward on every object on earth . Gravity multiplied by the objects mass produces a force called weight. Although the force of an objects weight acts downwards on every partial of the object , it is usually considered to act as a single force through its balance point , or center of gravity.

5 0
3 years ago
What does the kinetic theory state?
LUCKY_DIMON [66]

Answer:

Explanation:

Kinetic molecular theory of gasses stated that,

1) Gases consist of large number of smaller particles which are distance apart from each others.

2) The gas molecules collide with each other and also with wall of container and this collision is elastic.

3) Gas molecules are in continuous random motion and posses kinetic energy.

4) The forces of attraction between gas molecules are very small and considered negligible.

5) The temperature of gas is directly proportional to average kinetic energy of gas molecules.

8 0
3 years ago
At 25°C 12 M H202 is decomposed after 30 minutes the concentration of the H2O2 is found to be 9.5 M what is the average reaction
Bess [88]
The decomposition reaction of hydrogen peroxide:
2 H₂O₂(aq) →  2 H₂O(l) + O₂(g)
The order of reaction is : first order reaction.
[H₂O₂]₀ = 12 M at time = 0
[H₂O₂] = 9.5 M at time = 30 minutes
Average reaction rate = - (Δ[reactants] / Δt) 
                   = - (final reactants conc. - initial reactants conc.) / Δt
                   = - (9.5 M -12 M) / (30 min - 0 min) 
                   = 0.083 mol / L.min
8 0
3 years ago
When ethane (
LuckyWell [14K]

Answer:

9 Moles

Explanation:

C2H6 has 6 Hydrogens and Water Has 2 Hydrogens

so it takes 1 mole ethane to produce 3 moles water

1 Mole Ethane ----> 3 Moles Water so 3 ----> 9 moles

7 0
4 years ago
Which part of modern atomic theory was first developed by John Dalton?
Nuetrik [128]
C. one of the discoveries he made which gave him his fame in the scientific community was that the atom could not be destroyed
3 0
3 years ago
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