3 years ago

Which of the following apply to the property of hardness. Select all that apply.

Chemistry

2 answers:

Roman55 [17]3 years ago

7 0

The correct statements are:

Hardness is a physical property.

Friedrich Mohs developed the standard hardness scale.

Diamond can scratch quartz.

k0ka [10]3 years ago

3 0

I’m figuring this one out right now

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3. Burns from boiling water can be severe, caused by the transfer of energy from the boiling water to the

Free_Kalibri [48]

Answer:

Q = 3937.56 J

Explanation:

Heat transferred due to change in temperature is given by :

$Q=mc\Delta T$

c is the specific heat of water, c=4.18 J/g-°C

We have, m = 15 g, $T_i=100^{\circ} C\ \text{and}\ T_f=37.2^{\circ} C$

So,

$Q=15\times 4.18\times (37.2-100)\\Q=-3937.56\ J$

Hence, 3937.56 J of heat is transferred.

8 0

3 years ago

How many miles of lead are equal to 9.51 x 10^3 g Pb?

Lemur [1.5K]

Molar mass Pb = 207.2 g/mol

1 mole Pb ------------- 207.2
? mole Pb ------------ 9.51 x 10³

moles = 9.51 x 10³ * 1 / 207.2

moles = 9.51 x 10³ / 207.2

= 45.89 moles

hope this helps!

7 0

3 years ago

Plss help meeeeeeee i need help

Anastasy [175]

Answer:

D: dark cloud

E: elliptical galaxy

F: flare star

7 0

3 years ago

What is the attraction between molecules within a substance called? adhesion capillary action cohesion polarity.

cestrela7 [59]

Answer:

cohesion

Explanation:

just got it right

5 0

2 years ago

Read 2 more answers

Why can't the temperature of an object alone

lukranit [14]

Answer:

It cant

Explanation:

It can not tell because the size of a human and an object to 2 different sizes. Therefor since they are 2 different sizes they can handle different amounts of temperature.

4 0

2 years ago