2 years ago

What is a scanning tunneling microscope?

Chemistry

1 answer:

Crank2 years ago

7 0

A. Used for imaging surfaces at atomic level

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Make the following conversion. 954 g= _ kg 0954000 95400 0.954 0.0954

rewona [7]

Answer:

0.954

Explanation:

1000 grams is 1 kg

954 grams is 954/1000 kg or 0.954

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3 years ago

How many grams are in 2.3 x 10^-4 moles of Ca3(PO4)2

OLEGan [10]

Molar mass

Ca₃(PO₄)₂ = 310 g/mol

1 mole -------------------> 310 g
2.3x10⁻⁴ mole ---------> ?

m = 2.3x10⁻⁴ * 310 / 1

m = 0.0713 g

hope this helps!

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3 years ago

Why is the chemical formula 2C NOT an example of a diatomic molecule?

katen-ka-za [31]

Because it represents 2 atoms of carbon not 2 molecules of carbon

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3 years ago

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A tank with volume of 2.4 cu ft is filled with Methane to a pressure of 1500 psia at 104 degrees F. Determine the molecular weig

Soloha48 [4]

Explanation:

It is known that equation for ideal gas is as follows.

PV = nRT

The given data is as follows.

Pressure, P = 1500 psia, Temperature, T = $104^{o}F$ = 104 + 460 = 564 R

Volume, V = 2.4 cubic ft, R = 10.73 $psia ft^{3}/lb mol R$

Also, we know that number of moles is equal to mass divided by molar mass of the gas.

n = $\frac{mass}{\text{molar mass}}$

m = $n \times W$

= $0.594 \times 16.04$

= 9.54 lb

Hence, molecular weight of the gas is 9.54 lb.

We will calculate the density as follows.

d = $\frac{PM}{RT}$

= $\frac{1500 \times 16.04}{10.73 \times 564}$

= 3.975 $lb/ft^{3}$

Now, calculate the specific gravity of the gas as follows.

Specific gravity relative to air = $\frac{\text{density of methane}}{\text{density of air}}$

= $\frac{3.975 lb/ft^{3}}{0.0765 lb/ft^{3}}$

= 51.96

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3 years ago

PLEASE HELP

alukav5142 [94]

Answer:

will form bonds between atoms. for more details are in the pic

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3 years ago