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34kurt
3 years ago
14

Examples of hard water​

Chemistry
2 answers:
Ksju [112]3 years ago
3 0

Answer:

lake water, swamp water, like, any dirty and unpurified forms of water is hard water

Explanation:

ratelena [41]3 years ago
3 0

Answer:

Water is considered hard when it contains a large amount of the cations (positively-charged ions) Ca2+, Mg2+, and/or Fe3+. These ions are typically introduced into a water supply when the water drips through a mineral. Limestone is an example of a mineral that contains a source of calcium.

Explanation:

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Sulfur trioxide. hope this helps
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Which of the following statements correctly explains why bromination reactions are more selective than chlorination reactions.
Vinvika [58]

Answer: A bromine radical is more stable than chlorine radical, so it is less reactive and more choosy.

Explanation:

A chlorine atom being more electronegative in nature is able to attract a hydrogen atom more readily towards itself as compared to a bromine atom.

Since bromine is less electronegative in nature so bromine will be more selective as a hydrogen abstracting agent. As a result, bromine radical is more stable in nature than chlorine radical.

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6 0
3 years ago
which of the following types of stars would be hottest in temperature A main sequence B whitedwarf C red giant D Red supergiant
nalin [4]

Answer:

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Explanation:

3 0
3 years ago
the chemical compound C2F4 is used to make PTEE (Teflon). How manyC2F4 molecules are in 485 kilograms of this material?
monitta

Answer:

molecules=2.92x10^{27}moleculesC_2F_4

Explanation:

Hello,

In this case, we use the Avogadro's number to compute the molecules of C2F4 whose molar mass is 100 g/mol contained in a 485-kg sample as shown below:

molecules=485kgC_2F_4*\frac{1000gC_2F_4}{1kgC_2F_4} *\frac{1molC_2F_4}{100gC_2F_4}*\frac{6.022x10^{23}molecules C_2F_4}{1molC_2F_4}  \\\\molecules=2.92x10^{27}moleculesC_2F_4

Best regards,

5 0
3 years ago
Picking up a hot cup of coffee is an example of conduction, convection, or radiation.
tino4ka555 [31]

Answer:

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Explanation:

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:/ do you not have definitions  

8 0
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