CHEMISTRY HIGH SCHOOL

Which factor has the greatest effect on the melting point of a crystalline solid

Answers

Answer 1

Answer:

The answer is: the type of bonding among the particles.

For example, calcium oxide (CaO) has ionic bonds between calcium cations (Ca²⁺) and oxygen anions (O²⁻).

Because it has strong ionic bonds, it has high melting point (around 2600°C).

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

Amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point

Answer 2

Answer: Inter-molecular forces. The greater the attraction between particles the more energy required to break the forces or "melt" them.

Please mark as brainliest if satisfied with answer.

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What is the total number of grams of NaI(s)needed to make 1.0 liter of a 0.010 M solution?
(1) 0.015 (3) 1.5
(2) 0.15 (4) 15

Answers

You have to multiply. That is molecules x ram = 0.01 * 150 = 1.5So your answer is 3) 1.5.

Write a nuclear equation for the fusion of two h−2 atoms to form he−3 and one neutron.

Answers

'Heavy' hydrogen (the isotope deuterium) , 2/1H is involved ,

[2= mass number, 1= atomic (proton) number]

2/1H + 2/1H → 3/2He + 1/0n

Calculate the number of moles 3.15 g of HNO3 19.3 g of NaCl 21.25 g of NaNO3

Answers

The number of moles:
3.15g of $HNO_(3)$
1 mole of $HNO_(3)$ - 63g.
x moles of $HNO_(3)$ - 3.15g
$x=(1\ mole*3.15g)/(63g)=(3.15)/(63)=0.05\ mole$

The number of moles:
19.3 g of NaCl
1 mole of NaCl- 58.44g.
x moles of NaCl- 19.3g.
$x=(1\ mole*19.3g)/(58.44g)=(19.3)/(58.44)=0.33\ mole$

The number of moles:
21.25 g of $NaNO_(3)$
1 mole of $NaNO_(3)$ - 85g.
x moles of $NaNO_(3)$ - 21.25g.
$x=(1\ mole*21.25g)/(85g)=(21.25)/(85)=0.25\ mole$

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What is presipitation?

Answers

Precipitation is the prcross by which rain, sleet, snow, etc, is released from the clouds.

Magma from Earth's interior oozes from the cracks at mid-ocean ridges.
a. True
b. False

Answers

The answer is A. True

Magma from Earth's interior oozes from the cracks at mid-ocean ridges.

true is the right one

The volume of a gas decreases from 15.7 m3 to 11.2 m3 while the pressure changes from 1.12 atm to 1.67 atm. If the initial temperature is 245 K, what is the final temperature of the gas