Select the items that describe a chemical property below. Choose THREE correct answers.

Chemistry

1 answer:

FrozenT [24]3 years ago

8 0

Answer:

2:A handwarmer gets warm when it is opened and exposed to air.

3:Propane ignites to heat a grill.

4:Cotton is dyed red to make a dress.

Explanation:

The definition of a chemical property is when a property of characteristic of a substance that is <em><u>observed</u></em> during a reaction in which a chemical has been changed

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Which choice represents a compound?Required to answer. Single choice.

Citrus2011 [14]

Answer:

Explanation:

Elements will only one capital letter, that may/may not have a lower case letter after it. CO has a capital letter followed by another capital, so it's a compound

8 0

3 years ago

Boron has 5 protons. If another proton gets added to boron, what will happen?

Alla [95]

If another proton gets added to the molecule there will be an increase in the atomic number and atomic mass by 1 unit and a new species will form.

here boron is taken which has an atomic number of 5 and atomic mass of 11 so when we add a proton to it, it will change into carbon having atomic number as 6 and atomic mass as 12.

$_{5}^{11}\textrm{B}+_{1}^{1}\textrm{p}\rightarrow _{6}^{12}\textrm{C}$

The new species formed will be $_{6}^{12}\textrm{C}$ .

6 0

3 years ago

Read 2 more answers

Copper is commonly mined as an ore with a variable percent composition of copper (II) sulfide. This ore is also sometimes referr

pantera1 [17]

Answer:

$m_{CuO}=93.6gCuO$

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$CuS+\frac{3}{2} O_2\rightarrow CuO+SO_2$

Thus, given the 1.00-kg of 12.5% ore, we can compute the theoretical yield of copper (II) oxide via stoichiometry:

$m_{CuO}^{theoretical}=1.00kgCuS*\frac{1000gCuS}{1kgCuS} *\frac{12.5gCuS}{100gCuS} *\frac{1molCuS}{95.6gCuS} *\frac{1molCuO}{1molCuS} *\frac{79.5gCuO}{1molCuO} \\\\m_{CuO}^{theoretical}=103.95gCuO$