Ask question

Ask question

All categories

2 years ago

11

1. Which type of compound usually has higher melting points: ionic compounds or covalent compounds? What is the reason for this

difference in melting points?

1 answer:

ELEN [110]2 years ago

3 0

Ionic compounds have stronger bonds so a lot of energy is needed to break the bonds.

You might be interested in

Calculate the molarity of 0.700 mol of na2s in 1.05 l of solution.

slamgirl [31]

Molarity is the amount of solute molecule (in moles) per 1L of solvent. In this case, the solute is 0.7mol Na2S and the solvent volume is 1.05L. Since the unit in this problem is already mol and L then you don't need to do any conversion of the units. The calculation would be:

molarity = mol of solute / (1L/ volume of solvent)
molarity = 0.7 mol/ (1L/ 1.05L)= 0.67M

6 0

2 years ago

6. Suppose you are going to measure the length of a pencil in centimeters.

Montano1993 [528]

Answer:

Their answers must be in two decimal places

3 0

2 years ago

A scientist has two substances that she is testing in her lab: a pink

ankoles [38]

Answer:

Weaker attraction between its molecules than the green substance. It's molecules now move away from each other.

Explanation:

Liquid to gas.

3 0

2 years ago

John rode 3150 m at an average speed of 350 m/min.If he had ridden at average of 375 m/min instead. How much sooner would it hav

Svet_ta [14]

Explanation:

Given that:

Distance traveled = 3150m

Average speed = 350m/min

Suggested speed = 375m/min

Unknown:

Time = ?

Solution:

Speed is the rate of change of distance with time.

it is mathematically expressed as;

speed = $\frac{distance }{time}$

Initial time using speed 350m/min can be calculated by making time the subject of the formula;

time taken = $\frac{distance }{speed}$

time taken at speed of speed of 350m/min = $\frac{3150}{350}$ = 9min

to seconds = 9 x 60 = 540 seconds

time taken at speed of 375m/min = $\frac{3150}{375}$ = 8.4min

to seconds = 8.4 x 60 = 504 seconds.

It could have taken 504 seconds sooner saving 36 seconds.

learn more:

Speed brainly.com/question/10177389

#learnwithBrainly

7 0

2 years ago

Order the terms according to the path followed by oxygen during cellular respiration.

MArishka [77]

Answer:

Outside air

Nose

Lungs

Bloodstream

Cell

Explanation:

We breathe in oxygen from the outside air in through our nose and it travels to our lungs. Inside our lungs, we have Avioli's that diffuse oxygen into our bloodstream and the bloodstream helps the oxygen travel into our cells.

Hope this helps :)

8 0

2 years ago