All categories

3 years ago

As a solid element melts, the atoms become and they have attraction for one another.

1 answer:

5 0

As a solid element melts, the atoms become more separated and they have less attraction for one another.
When a solid element starts melting, it means that it is using up a lot of energy it has stored. And when there is a lot of energy being used up, its particles are vibrating fast, and becoming more and more separated. So obviously, if these atoms are far from each other, they aren't going to attract.

You might be interested in

Mg(Oh)2 calculate molar mass

kvv77 [185]

Answer:

From molar mass=total RAM

Mg=24,O=16,H=1

24+(16+1)×2

Therefore Molar mass=58g/mol

4 0

3 years ago

Can someone please help with chemistry? Lead has a density of 10.5 g/cm^3. What is the diameter of a lead ball that has a mass o

adelina 88 [10]

Density = Mass / Volume

10.5 = 500 / x

10.5x = 500

x = 50 cm^3 (1 sig fig) volume of the sphere

Volume of a sphere = 4/3 pi r^2

pi = 3.14 r = radius

50 = 4/3 pi r^3

50•3/4 = pi r^3

37.5 = pi r^3

37.5/pi = r^3

11.9 = r^3

cube root(11.9) = r

2.3 = r

Diameter = 2•radius

Diameter = 2 • 2.3

Diameter = 5 cm (1 sig fig) diameter

3 0

3 years ago

Predict the formula for a compound made from X3 and Y2–.

WINSTONCH [101]

The compound formed will be X2Y3 with oxidation number of X = +3 and of Y = -2.

Example of X2Y3 type compounds are Fe2O3 and Mn2O3.

Hope this helps!!

3 0

3 years ago

Who know the answer

bekas [8.4K]

First, let's explain the variables. F means force, m means mass, and a means acceleration. F is measured in Newotns [N], mass is measured in kilograms [kg], and acceleration in measured in meters per squared second [m/s²].

Now let's mover on the first problem.

Given

m = 1000 kg

a = 3 m/s²

According to the second law of Newton, the force is equal to the acceleration multiplied by the mass.

$F = am\\F = 3 * 1000\\F = 3000 N$

The answer is 3000 N.

The second problem is smiliar.

Given

m = 70 kg

F = 250 N

We use the same formula from before, and use a bit of algebra to adapat it to our needs.

$F = ma\\\frac{F}{m} = a\\a = \frac{F}{m}\\a = \frac{250}{70} \\a = 24\frac{1}{7} m/s^{2}$

The answer is 24 1/7 s/m^2.

6 0

3 years ago

Select true or false: if the ph of pure water is 7.0, the hydroxide ion concentration in pure water is 1 × 10–7 m.

Vedmedyk [2.9K]

Answer:

True

Explanation:

as the ph of pure water is 7

(-)log(10^-7) = 7

7 0

3 years ago

As a solid element melts, the atoms become __________ and they have __________ attraction for one another.

As a solid element melts, the atoms become and they have attraction for one another.