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alukav5142 [94]
3 years ago
8

An object is moving with a velocity in the positive direction. If

Chemistry
1 answer:
ludmilkaskok [199]3 years ago
3 0

Answer:

Please elaborate. Maybe if you had actual answer choices

Explanation:

...

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Which two elements are most abundant within the sun?
padilas [110]
Hydrogen and helium.
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3 years ago
PLS I NEED HELP give me examples of an atom
Ugo [173]

Answer:

Neon (Ne)

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Argon (Ar)

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Calcium (Ca)

Deuterium, an isotope of hydrogen that has one proton and one neutron.

Plutonium (Pu)

F-, a fluorine anion.

Explanation:

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4 0
2 years ago
The compound sodium carbonate is a strong electrolyte. Write the reaction when solid sodium carbonate is put into water:
Ludmilka [50]

The compound sodium carbonate is a strong electrolyte because it completely dissociates when placed in water into its component ions. The equation of the reaction can be expressed as:

Na_2CO_3_{(s)} ---> 2 Na^+_{(aq)} + CO_3^{(2+)}_{(aq)}

The dissociation leads to the formation of sodium and carbonate ions with the latter held together by its internal covalent bond.

This is unlike weak electrolytes that do not dissociate completely in water or aqueous solutions. Only a small fraction of the solute exists as ions in the solution.

More on strong and weak electrolytes can be found here: brainly.com/question/3410548

7 0
3 years ago
You are performing an experiment in a lab to attempt a new method of producing pure elements from compounds. The only problem is
Verdich [7]

You need to calculate the atomic weight of that element.

number of moles = mass / atomic weight

atomic weight = mass / number of moles

atomic weight = 209.1 / 3 = 69.7 g/mol

The element produced will be gallium, Ga.

6 0
3 years ago
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Measurements show that enthalpy of a mixture of gaseous reactants decreases by 228. kJ during a certain chemical reaction, which
Tcecarenko [31]
Total change in energy = Heat produced by system + work done on the system
= 228 - 55
= 173 kJ

Because this energy is released as heat, the reaction is exothermic.
7 0
2 years ago
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