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Ugo [173]
3 years ago
12

Please help me thanks so much....I’ll mark you?!?!:)))) (15 points)

Chemistry
1 answer:
Ber [7]3 years ago
6 0

Answer:

a penny that has turned green

Explanation:

a chemical change is when a substance combines with another to form a new substance. the other answer choices doesn't form a new substance.

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When solutions of barium chloride and lithium sulfate are mixed, the spectator ions in the resulting reaction are?
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20% humidity is a low level which means there would be less of a chance of it
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Write the symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 9 neutrons
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The number of protons uniquely identifies the element. This is not on the periodic table. Isotopic notationincludes the atomic number and the mass number. 8 17 This isotope of oxygen has 8 protons (atomic number), 8 electrons and 9 neutrons
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Which compound has the highest boiling point?<br><br> NaCl<br><br> H2O<br><br> O2<br><br> C6H12O6
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<span>Which compound has the highest boiling point?
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4 0
4 years ago
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A battery can provide a current of 4.60 A at 3.40 V for 2.50 hr. How much energy (in kJ) is produced? 1st attempt kJ Energy
Lunna [17]

Answer:

The energy produced equals 140.760 kJ

Explanation:

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Now Since Power=\frac{Energy}{Time}\\\\Energy=Power\times Time

Again applying the calculated values we get

Energy=15.64\times 2.50\times 3600=140760Joules=140.76kJ

4 0
4 years ago
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