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Helen [10]
3 years ago
12

Shiloh wanted to observe the changes that occurred during an exothermic reaction. He monitored the changes and placed them in a

chart.
Chemistry
1 answer:
Nostrana [21]3 years ago
7 0
<span>The activation energy was reached was 10:45 a.m. The additional energy did not affect the reaction.</span>
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Infer if the mineral Talc would be a good choice when building a statue outside?
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Talc is not a good choice when building a statue because the mineral Talc is one of the weakest minerals on the Mohs Scale with a hardness of 1 since it could be scratched by a fingernail, which means that when people build a statue with Talc, it could be easily broken down.
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If more solute can be dissolved in a solvent, the solution is
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Answer:

the answer is unsaturated

Explanation:

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What relationship exists between the mass number of an element and the isotopes of that element?
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The mass number plays an important role for elements and their isotopes. Mass number comes from the addition of protons and neutrons (their weight). Isotopes are the elements, but with a different number of neutrons. So in turn, by subtracting the number of protons (atomic number) from the mass, you can find the number of neutrons.
8 0
3 years ago
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how many moles of sodium are present in a sample of sodium having a mass of 137 g? (molar mass is 23.0g)
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5.95 moles

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7 0
3 years ago
A student has a cube that has a mass of 5.5g and a volume of 4.10 cm3. What substance does he have?
Gnom [1K]

Answer:

1- d= m/v  d=540/200 d=2,7 g/cm

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