CHEMISTRY HIGH SCHOOL

Why is glass a good substance for storing chemicals?A. Glass is a noble solid.
B. Glass has low reactivity.
C. Glass is cheap and readily available.
D. The melting point of glass is very high.

Answers

Answer 1
Answer:

B, I just took the test and the correct answer is b. Cheap doesn't always equal quality.

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To find the atomic mass of a particular atom you need to knowa. the number of protons.
b. the number of neutrons.
c. the number of protons and neutrons.
d. simply what element the atom belongs to.

Answers

You just need the number of protons and number of neutrons as the mass of eelctrons is negligible

Answer:

C. the number of protons and neutrons

The combustion of fossil fuels releases ____ into the atmosphere. oxygen

gasoline

carbon

glucose

Answers

Answer: The correct answer is carbon.

Explanation:

Combustion reaction is defined as the reaction in which a hydrocarbon burns in oxygen or reacts with oxygen gas to produce carbon dioxide and water molecule.

Fossil fuels are defined as the hydrocarbons which mainly contains coal, fuel oil, natural gas etc..

When fossil fuels are burned in air, it mainly releases carbon dioxide, sulfur dioxide, methane, nitrous oxide etc..

The major component released during the combustion of fossil fuels is carbon.

Hence, the correct answer is carbon.
CARBON because fossil fuells 

The mass of 2 cm3 of gold is 38.6 grams. find the density of the gold. Could you please help me??

Answers

Density = Mass / Volume
so, Density of gold = 38.6/2 = 19.3

An aqueous solution has a mass of 490 gramscontaining 8.5 103 gram of calcium ions. The
concentration of calcium ions in this solution is
(1) 4.3 ppm (3) 17 ppm
(2) 8.5 ppm (4) 34 ppm

Answers

One way of expressing concentration is by expressing it by parts per million or ppm. Parts per million is equal to 1 milligram of solute per kilogram of solution. The problem is solved as follows:
ppm = .0085103 mg / .490 kg = 0.017 ppm

What energy resource can be used instead of fossil fuel

Answers

We could use solar power, wind power, geothermal power, hydroelectric power, or nuclear power. There are probably more but this is what I can think of off the top of my head. I hope this helps. Let me know if anything is unclear.

Which materials typically make up the a horizon in soil?

Answers

The A horizon is a surface horizon that largely consists of minerals (sand, silt, and clay) and with appreciable amounts of organic matter. This horizon is predominantly the surface layer of many soils in grasslands and agricultural lands.These materials typically accumulate through a process termed illuviation, wherein the materials gradually wash in from the overlying.
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