CHEMISTRY HIGH SCHOOL

A metal melts at 450 degrees celsius. Is this property of the metal classified as chemical or physical?

Answers

Answer 1
Answer:

Answer:

physical

Explanation:

because if you let it cool down it will turn back into its original form

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The alkali metals are

Answers

Answer:

They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

Hope this helps :)

Answer:

Groups one of the periodic table.

Lithium    Li

Sodium       Na

Potassium     K

Rubidium        Rb

Cesium        Cs

Francium     Fr

Which of the following events on the sun affects the Earth in either a direct or indirect way?A. Corona mass ejection or CMEs only
B. Solar flares only
C. Solar systems only
D. All of the above

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Answer:

Explanation:

D

What is another term used for a "base"

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Answer:

Alkali.

Alkali, a different word for base in chemistry, has some distinctions. Although all bases are alkalis, not all alkalis are bases.
another term used for a "base" is basis or foundation

Which contains more molecules: 1.00 mol H2O2, 1.00 mol C2H6, or 1.00 mol CO?

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I believe H2O2 has the most, because it also has the most atoms (34)
Hope that helps!!

The making of ice cubes is an endothermic reaction

Answers

Answer:

no

Explanation:

it is not endothermic reaction

Write the net ionic equation for the following reaction:

AgC2H3O2(aq) + CaCl2(aq) →

Answers

Answer:

2Ag^+(aq) + 2Cl^-(aq) --------> 2AgCl(s)

Explanation:

The net ionic equation reflects the main reaction that occurred in the system. It tells you the most important reaction that took place.

If we first put down the balanced molecular equation for the reaction, we have;

CaCl2(aq) + 2 AgC2H3O2(aq) ---------> 2 AgCl(s) + Ca(C2H3O2)2 (aq)

The net ionic equation is;

2Ag^+(aq) + 2Cl^-(aq) --------> 2AgCl(s)
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What volume of oxygen at STP is required for the complete combustion of 100.50 mL of C2H2?