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3 years ago

Name the hardest artificial substance known?

Chemistry

2 answers:

3241004551 [841]3 years ago

6 0

Answer:

wurtzite boron nitride

Scientists have calculated that wurtzite boron nitride has a greater indentation strengths than diamond.

blagie [28]3 years ago

4 0

The hardest material is diamond. The hardest artificial substance would wurtzite boron nitride. That's basically just man-made diamonds.

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If a rock contains rounded grains of sediments, what can you tell about that rock?

Zielflug [23.3K]

Answer:

sedimentary rock

Explanation:

sediment + rock

= sedimentary rock

6 0

3 years ago

We add a 1.20-g sample of dry ice to a 755-mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 725mmHg

yaroslaw [1]

Answer:

Total pressure is 1396 mmHg

Explanation:

By:

PV/RT = n

It is possible to obtain the initial moles of nitrogen gas, where:

P is pressure (725 mmHg = 0,954 atm)

V is volume (0,755L)

R is gas constant (0,082atmL/molK)

T is temperature (25,0°C = 298,15 K)

Replacing:

n = 0,02946 moles of nitrogen gas.

The moles of dry ice (CO₂; molar mass= 44,01 g/mol) are:

1,20 g × (1mol/44,01g) = 0,02727 moles of dry ice.

When dry ice sublimes, total moles are:

0,02727 + 0,02946 = 0,05673 moles

With the temperature (25,0°C = 298,15 K) and volume (0,755L) it is possible to obtain total pressure, thus:

P = nRT/V

Replacing:

P = 1,837 atm × (760 mmHg/1atm) = 1396 mmHg

I hope it helps!

3 0

4 years ago

What is the unit you would use for volume of a solid?

skad [1K]

The volume of a solid is measured in cubic units i.e. cubic centimeter, cubic meter, cubic feet etc.

4 0

3 years ago

Can someone solve this plz βeta decay carbon atomic mass 14 atomic # 6

nordsb [41]

Answer:

14/6C your welcome

Explanation:

8 0

3 years ago

A solution of dispersant is made by taking 15.0 mL of a 50.0 mg/mL solution of Randyne and mixing it with 50.0 mL of water. Calc

Len [333]

Answer:

The final concentration of the Randyne in grams per milliliter = 0.011 g/mL

Explanation:

As we know

C1V1 = C2V2

C1 and C2 = concentration of solution 1 and 2 respectively

V1 and V2 = Volume of solution 1 and 2 respectively

Substituting the given values, we get -

$50 * 15 = X * (15+50)\\X = 11.54$ mg/mL

The final concentration of the Randyne in grams per milliliter = 0.011 g/mL

8 0

3 years ago