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pickupchik [31]
3 years ago
9

What is gravity the primary source for ?

Chemistry
2 answers:
viktelen [127]3 years ago
5 0

Answer:

To keep us on earth and if there’s no gravity all the birds will die cause they depend on gravity to drink water

Explanation:

andreev551 [17]3 years ago
4 0
Is there answer to the question
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Which of the following groups have seven valence electrons and are very reactive?
valina [46]

Answer:

Column 17 halogens

Explanation:

To answer the question we need to know the following;

What are valence electrons?

  • Valence electrons are outermost electrons in the outermost energy level of an atom of any element.

What are halogens?

  • Halogens are group 7 elements that have seven valence electrons. They include, chlorine, fluorine, iodine, etc

What is the reactivity of halogens?

  • Halogens are the most reactive non-metals in the periodic table. They react by gaining one electron to attain a stable configuration.
4 0
3 years ago
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Which is the formula for diarsenic pentoxide?
Olenka [21]
Formula for diarsenic pentoxide
As2O5
7 0
3 years ago
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Why does the moon Appear in the daytime????/?//
Mrrafil [7]

Answer: We can see the moon during the day for the same reason we see the moon at night. The surface of the moon is reflecting the sun's light into our eyes

Explanation:

8 0
2 years ago
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Which of these is evidence that an unbalanced force is acting on an object?
Anna11 [10]

Answer:

The motion of the object is changing

Explanation:

Objects will only change their motion (direction, speed) if there is an unbalanced force of some kind acting on them. Balanced forces result in no change in the object's state of motion.

5 0
2 years ago
When 1.50 g of ba(s) is added to 100.00 g of water in a container open to the atmosphere, the reaction shown below occurs and th
damaskus [11]

<u>Given:</u>

Mass of Ba = 1.50 g

Mass of H2O = 100.0 g

Initial temp T1 = 22 C

Final Temp T2 = 33.1 C

specific heat c = 4.18 J/g c

<u>To determine:</u>

The reaction enthalpy

<u>Explanation:</u>

The heat released during the reaction is:

q = - mc(T2-T1) = - (100+1.5) g *4.18 J/g C * (33.1-22) C = -4709.4 J

# moles of Ba = Mass of Ba/Atomic mass of Ba = 1.5 g/137 g.mol-1 = 0.0109 moles

ΔH = q/mole = - 4709.4 J/0.0109 moles = - 432 kJ/mol

Ans : The enthalpy change for the reaction is -432 kJ/mol


4 0
3 years ago
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