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Ann [662]
3 years ago
7

What are the benefits and drawbacks to having a pouring temperature that is much higher than the metal’s melting temperature?

Chemistry
1 answer:
Mashcka [7]3 years ago
3 0

Answer:

The main advantage would be that with the pouring temperature being much higher, there is very little chance that the metal will solidify in the mould while busy pouring. This will allow for moulds that are quite intricate to still be fully filled. The drawbacks, though, include an increased chance defects forming which relates to shrinkage (cold shots, shrinkage pores, etc). Another drawback includes entrained air being present, due to the viscosity of the metal being low because of the high pouring temperature.

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what would be the final volume when 2.20 M solution is made from 25.0 mL of a 12.0 M solution? plzz show work
cupoosta [38]

Answer:

136.36 mL

Explanation:

Here we have to use the dilution formula

From C1V1= C2V2

Where;

C1= initial concentration of the solution= 12.0 M

C2= final concentration of the solution= 2.20 M

V1 = initial volume of the solution= 25.0 ml

V2= final volume of the solution= ?????

Then recall;

C1V1=C2V2

V2 = C1V1/C2

Substituting values from the parameters given;

V2= 12.0 × 25.0 / 2.20

V2= 136.36 mL

7 0
3 years ago
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hammer [34]

Answer:

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Explanation:

Please see the attachment

8 0
3 years ago
Why ddo all collisions between reactant molecules not lead to reaction.
jok3333 [9.3K]

Answer:

The colliding molecules need to possess certain energy which is greater than the activation energy Ea and proper orientation.

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7 0
2 years ago
What is the osmolarity of a solution made by dissolving 0.50 mole of the strong electrolyte cacl2 in 1.0 l of solution?
valina [46]
Osmolarity=osmole  of  the  solute/litres  of  the  solution
ionic  equation  for  dissociation  of  CaCl2  is
CaCl2--->Ca2+   +2Cl-
total osmoles  for  reaction are    1(Ca2+)  + 2(Cl-)= 3 osmoles
therefore
 
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osmolarity=1.5 /1.0  L=1.5 osmol/l
6 0
3 years ago
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Dahasolnce [82]

Answer:

It depends on what type of environment you are looking for. If you are looking for a warmer climate, warm weather and temperature is important. If you are looking for a cooler climate, you should look for colder weather and temperature. Humidity, geographical location, plant growth and foliage and elevation are also important when looking for a place to vacation.

Explanation:

5 0
3 years ago
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