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Masteriza [31]
3 years ago
9

in times of hot dry weather some cities ban the use of garden sprinklers why do you think there is such a rule

Chemistry
2 answers:
Over [174]3 years ago
8 0

Answer:

To restrict the amount of water being utilized from a limited supply.

Explanation:

A sprinkler or a hosepipe ban gets imposed in certain cities during hot weather conditions in order to conserve the declining levels of drinking water, that is, stored in the reservoirs at the time of drought. Once the rainy season comes back the ban gets lifted as the reservoirs get filled once again, and it is more essential to provide water to the public, as the grass can always grow again.

Solnce55 [7]3 years ago
7 0

ban the use of garden sprinklers during hot dry weather because If water use doesn't decrease soon, pressure could start dropping and supplies could cut out without warning. Weeks of dry weather, high temperatures and warm winds have pushed water use almost to the limit.


 

                                                                                                                                      

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True or False: Sulfur by itself isn't too bad, it's when it reacts with other elements that it can become dangerous
yKpoI14uk [10]

Answer:sulfer by itself is not pleasant and it can be dangerous by itself but in large amounts.

Explanation:

5 0
3 years ago
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34g aluminum are combined with 39g chlorine gas which is the limiting reactant
vampirchik [111]

The limiting reactant is chlorine (Cl2).

<u>Explanation</u>:

Limiting reactant is the amount of product formed which gets limited by the reagent without continuing it.

        2 Al + 3 Cl2 ==> 2 AlCl3  represents the balanced equation.

Number of moles Al present = 34 g Al x 1 mole Al / 26.98 g

                                                = 1.260 g moles of Al

Number of moles Cl2 present = 39 g Cl2 x 1 mole Cl2 / 35.45 g

                                                  = 1.10 g moles of Cl2

Dividing each reactant by it's coefficient in the balanced equation obtains:

1.260 moles Al / 2 = 0.63 g moles of Al

1.11 moles Cl2 / 3 = 0.36 g moles of Cl2

The reactant which produces a lesser amount of product is called as limiting reactant.

Here the Limiting reactant is Cl2.

6 0
3 years ago
PLEASE HELP MEEEE
Sholpan [36]

Answer:

spf 30

Explanation:

its a good sunscreen btw

4 0
3 years ago
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PLEASE HELP ASAP!!!
alexdok [17]

Answer:

Answers are bellow.

Explanation:

The element with electron configuration 1s22s22p63s1 belong I A group in the periodic table and it is sodium because it loses one electron.

We have periodic table in attachments.

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell, which it readily donates, creating a positively charged ion—the Na+ cation. Its only stable isotope is 23Na.

The free metal does not occur in nature, and must be prepared from compounds.

It is soft metal, reactive and with a low melting point.

8 0
3 years ago
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When 2.16g of H2 reacts with excess O2 by the following equation, 258 kJ of heat are released. What is the change of enthalpy as
alekssr [168]

Answer:

-241 kJ/mol

Explanation:

Let's consider the reaction of hydrogen with excess oxygen to form water.

2 H₂ + O₂ ⟶ 2 H₂O

When 2.16g of hydrogen reacts with excess oxygen, 258 kJ of heat are released, that is, Q = -258 kJ. Considering that the molar mass of hydrogen is 2.02 g/mol, the change of enthalpy associated with the reaction of 1.00 mol of hydrogen gas is:

ΔH° = -258 kJ/2.16 g × (2.02 g/1.00 mol) = -241 kJ/mol

8 0
3 years ago
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