Expressed in proper scientific notation, the number is 0.00213 a 0.213 x 10² b. 2.13 x 10⁻² c. 2.13 x 10⁻³ d. 213 x10⁰

Answers

Answer 1

Answer: The proper scientific notation is 2.13 x 10⁻³.

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6X, Y and Z are all gases that behave ideally and react according to the equation shown.
X(g) + 2Y(g) → 2Z(9)
When 3.0 mol of X and 3.0 mol of Y are placed inside a container with a volume of 1.0 dmº, they
react to form the maximum amount of Z.
The final temperature of the reaction vessel is 120°C.
What is the final pressure inside the reaction vessel?
А
4.49 x 10 Pa
B
9.80 x 106 Pa
C
1.47 x 10' Pa
D
1.96 x 10' Pa

Answers

Answer:

Explanation:

PV=nRT

n=nx + my

n=3mol+3mol

n=6mol

T=120+273=393K

P=nRT/V

P=6×0.0821×393/1

P=193atm

1atm=1.01325×10^5Pa

193atm=xPa

x=1.96×10^7Pa

A mixture consists of sand and an aqueous salt solution. Which can be used to seperate the same, salt, and water from each other

Answers

The process which can be used to separate salt from the sand is leaching since salt is soluble in water thus it goes to the water leaving the sand behind. To separate salt from the water, you can allow the water to evaporate where it undergoes a phase change.

Is there a relationship between an elements atomic number and its first ionization energy (IE)?

Answers

yes, well kind of, as you travel across the a period the first ionization energy increases). as you travel down a column the ionization energy decreases.

Determine the number of centiliters in 2.4 x 10^3 milliliters.

Answers

2.4(10^3)

=2.4*10^3

=2.4*(10*10*10)

=2400 milliliters

To centiliters is 2400mL= 240.0000cl.

2.4(10^3) To the power off

=2.4*10^3

=2.4*(10*10*10)

=2400 milliliters

To centiliters is 2400mL= 240.0000cl.

Cl= Centiliters

The symbol for gold is
a. AU.
b. G.
c. Go.
d. Au.

Answers

D. Au

Every other answer doesn't represent any element.

Which statement describes J.J. Thomson’s plum-pudding model of the atom?A. The electrons take up most of the space in an atom.
B. The electrons in the atom orbit around the protons.
C. The electrons are embedded in a positive sphere.

Answers

Option C: the electrons are embedded in a positive sphere.

As we know that was a wrong model and nowadays the electrons are considered to be around the nucleus, in regions called orbitals.

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