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Nady [450]
3 years ago
5

Heating devices can be made by passing an electric current through a conductor of:

Chemistry
1 answer:
olchik [2.2K]3 years ago
6 0

Answer:

High resistance

Low conductivity

Explanation:

The more resistance (aka less conductivity) there is, the more the energy is turned into heat than simply  passing through the object.

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The ksp of calcium carbonate, caco3, is 3.36 × 10-9 m2. calculate the solubility of this compound in g/l.
maw [93]
CaCO₃ partially dissociates in water as Ca²⁺ and CO₃²⁻. The balanced equation is,
                       CaCO₃(s) ⇄ Ca²⁺(aq) + CO₃²⁻(aq)
Initial                Y                   -                 -
Change           -X                  +X              +X
Equilibrium      Y-X                 X                X

Ksp for the CaCO₃(s) is 3.36 x 10⁻⁹ M²

                Ksp = [Ca²⁺(aq)][CO₃²⁻(aq)]
3.36 x 10⁻⁹ M² = X * X
3.36 x 10⁻⁹ M² = X²
                    X = 5.79 x 10⁻⁵ M

Hence the solubility of CaCO₃(s) = 5.79 x 10⁻⁵ M
                                                     = 5.79 x 10⁻⁵ mol/L

Molar mass of CaCO₃ = 100 g mol⁻¹

Hence the solubility of CaCO₃ = 5.79 x 10⁻⁵ mol/L x 100 g mol⁻¹
                                                 = 5.79 x 10⁻³ g/L

7 0
3 years ago
What happens to a water bottle in a freezer and why
Andrews [41]
The water well begin to freeze and turn into soild. why? because the temperature of the the freezer is getting the water bottle cold so when that cold temperature hits that that bottle which has liquid in it so you should know that when liquid is into cold air it well so be soild so when you put the water bottle in the freezer it will be soild. 
and also remember gas - liquid - soild gas change to liquid by hot air  and liuid change to soild by clod air 
hoped i helped 
5 0
3 years ago
How does atomic hydrogen torch function for cutting and welding purposes​
lbvjy [14]

Explanation:

atomic hydrogen torch utilizes an electric arc whereby two closely - but not touching electrodes - result in the release of powerful electric spark as the current tries to flow through the gap. The gap is filled with hydrogen gas in an atomic hydrogen torch rather than air. The electric arch is split the hydrogen gas molecules into hydrogen atoms (some in plasma form). When the hydrogen atoms land on cooler objects like the metal being welded or cut, they region back to H₂ molecules releasing enormous amounts of heat on the surface. Surface temperatures can reach   4000 °C. The use of hydrogen gas protects the metal being welded from oxidation. Oxidation may compromise the quality of the weld.

Learn More:

For more on other welding torches check out;

brainly.com/question/13335545

brainly.com/question/13056701

#LearnWithBrainly

5 0
3 years ago
ANSWER FAST PLZ 25 POINTS!!!!!!!!!!!!!!!
sp2606 [1]

Answer:

The answer is A, if im not mistaken

8 0
3 years ago
What is the total temperature change between 3km and 7km above earth's surface
leva [86]
4km I believe is the answer
4 0
3 years ago
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