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defon
2 years ago
14

A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determin

es the element's identity?
Group of answer choices (Could someone help me? I am kind of confused) Thank you so much

A. The number of valence electrons

B. The location of valence electrons

C. The number of neutrons

D. The number of protons
Chemistry
1 answer:
eduard2 years ago
3 0
B explanation explanation point
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When ammonium carbonate decomposes what gas is produced and will a glowing splint burn brighter in the presence?
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3 years ago
The heat released by one mole of sugar from a bomb calorimeter experiment is 5648 kJ/mol. The balanced chemical reaction equatio
Bogdan [553]

Answer:

The answer to your question is the letter C) 5648 kJ/mol

Explanation:

Data

                C₁₂H₂₂O₁₁  +  12 O₂  ⇒   12 CO₂  +  11 H₂O

H° C₁₂H₂₂O₁₁ = -2221.8 kJ/mol

H° O₂ = 0 kJ / mol

H° CO₂ = -393.5 kJ/mol

H° H₂O = -285.8 kJ/mol

Formula

ΔH° = ∑H° products - ∑H° reactants

Substitution

ΔH° = 12(-393.5) + 11(-285.8) - (-2221.8) - (0)

ΔH° = -4722 - 3143.8 + 2221.8

Result

ΔH° = -5644 kJ/mol

6 0
3 years ago
Urgent !!!!
saul85 [17]

Answer:its y

Explanation:its going down with the most force, the end of the hill is the fastest if that makes sense

5 0
3 years ago
Read 2 more answers
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