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3 years ago

What mineral has the least hardness according to the scale?

1 answer:

7 0

The softest mineral in the Mohs Hardness Scale is talc.
Talc is often used in baby powder and corn starch, among other things. Talc cleaves into thin sheets, and it is held together only by van de Waals bonds, which allows these sheets to slip past each other. This gives the mineral its softness and it is often valued as a high-temperature lubricant.

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Calculate the molarity of a soln of 3 mols of NaOH in 2 L

Grace [21]

Molarity = 1.5

molarity = moles/liters
m= 3/2
m= 1.5

4 0

3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

horsena [70]

Answer: Hard working,satisfied. (i think)

~Please mark as brainiest~

3 0

3 years ago

Read 2 more answers

What is the volume of 1.9 moles of chlorine gas (Cl2) at 298 K and 1.3 atm?

matrenka [14]

<h2>Hello!</h2>

The answer is:

The correct option is option C.

$V=36L$

To calculate the volume of the gas sample, we need to use the Ideal Gas Law, this equation is used to relate the pressure, the volume, the mass and the temperature of a gas, so, we can isolate the volume from it.

The Ideal Gas Law equation is equal to:

$PV=nRT$

Where,

P is the pressure (in atm)

V is the volume (in liter)

n is the mass of the gass (in mole)

T is the temperature of the gass (absolute temperature)

So, from the statement we know that:

$Pressure=1.3atm\\Temperature=298K\\n=1.9moles\\R=0.082057\frac{L.atm}{mol.K}$

Then, substituting and calculating we have:

$PV=nRT\\\\V=\frac{nRT}{P}=\frac{1.9moles*0.082057\frac{L.atm}{mol.K}*298K}{1.3atm}=35.74L$

Now, rounding to the nearest whol number we have that the volume is equal to 36 L.

Hence, the correct option is option C.

Have a nice day!

5 0

3 years ago

What is the total amount of heat required to vaporize 1.00 gram of H2O (l) at 100 c and 1 atmosphere

Firlakuza [10]

The equation to be used to calculate the heat required to vaporize 1 gram of water at 100 degrees eclsius and 1 atmosphere is the enthalpy. It is represented as H = mCpT where H is the heat released after phase change, m is the mass of the substance, Cp is the specific heat capacity of the substance and T is the change in temperature.

H = mCpT

H = (1g/1000g/kg)(4.184kJ/kg-K)(100 - 20)

H = 0.335 kJ

8 0

3 years ago

Convert this temperature from °F to °C. Explain how pls?

Tamiku [17]

Answer:

Start with the temperature in Fahrenheit (e.g., 100 degrees).

Subtract 30 from this figure (e.g., 100 - 30 = 70).

Divide your answer by 2 (e.g., 70 / 2 = 35).

7 0

3 years ago