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3 years ago

Closest noble gas to neon?

Chemistry

2 answers:

Nataly [62]3 years ago

7 0

Hi!

I'm not entirely sure about this so I'm sorry if I'm wrong but I think it would be helium.

Again in not entirely sure but i hope this helped you, i hope you have a great day, afternoon, or night!

cupoosta [38]3 years ago

5 0

Neon is a noble gas already :)

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A 255 mL round--bonom flask is weighed and found to have a mass of 114.85 g. A few millimeters of an easily vaporized liquid are

Alex17521 [72]

Answer: Option (d) is the correct answer.

Explanation:

According to the given situation, mass of compound will be calculated as follows.

Mass of compound = mass of flask and condensed vapor - mass of flask

= 115.23 - 114.85

= 0.38 g

Volume (V) = 255 mL = $255 \times 10^{-6} m^{3}$ (as 1 ml = $10^{-6} m^{3}$ )

Pressure (P) = 101325 Pa

Temperature = $100^{o}C$ = (100 + 273) K = 373 K

Now, according to the ideal gas equation, PV = nRT

and, moles of compound n = $\frac{PV}{RT}$

= $\frac{101325 \times 255 \times 10^{-6}}{8.314 \times 373}$

= 0.008332 mol

As, molar mass of compound = $\frac{mass}{\text{no. of moles}}$

= $\frac{0.38}{0.008332}$

= 46 g/mol

Therefore, the compound is $C_{2}H_{5}OH$ (molar mass = 12 x 2 + 5 x 1 + 16 + 1 = 46 g/mol).

Thus, we can conclude that out of the given options the liquid could be $C_{2}H_{5}OH$ .

4 0

3 years ago

3.364 g of hydrated barium chloride of BaCL2.xH2O was dissolved in water and made up to a total volume of 250.0 mL. 10.00 mL of

atroni [7]

Given:

Mass of hydrated barium chloride = 3.364 g

Total volume of barium chloride V(total)= 250 ml

Volume taken for titration V = 10 ml

Volume of AgNO3 consumed = 46.92 ml

Concentration of AgNO3 = 0.0253 M

To determine:

The value of x i.e. the water of hydration in BaCl2

Explanation:

The net ionic equation is-

Ag⁺(aq) + Cl⁻(aq) → AgCl(s)

Based on the reaction stoichiometry: Equal moles of Ag+ and Cl- combine to form AgCl

Moles of Ag+ consumed = moles of Cl- present

Moles of Ag+ = V(AgNO3) * M(AgNO3) = 0.04692 * 0.0253 = 0.00119moles

Moles of Cl- present = 0.00119 moles

Thus, 0.00119 moles of Cl- are present in 10 ml of the solution

Therefore, number of moles of Cl- in 250 ml would be-

= 0.00119 * 250 /10 = 0.02975 moles of cl-

Now:

2 moles of Cl- are present in 1 mole of BaCl2

Therefore, 0.02975 moles of Cl- correspond to- 0.02975 * 1/2 = 0.01488 moles of BaCl2

Molar mass of BaCl2 = 208.22 g/mol

Thus, mass of BaCl2 = 0.01488 moles * 208.22 g.mol-1 = 3.098 g

Mass of water of hydration = 3.364 - 3.098 = 0.266 g

# moles of water 'x' = .266/18 = 0.015 ≅ 1

Ans: Formula for hydrated barium chloride = BaCl2. 1H2O

7 0

4 years ago

What is the correct order of energy transformation in a windmill?

Vika [28.1K]

Answer:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.

hope it helps (^^)

# Cary on learning

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2 years ago

Advantages and disadvantages of solar power

Andrews [41]

Answer:

Advantakes= it is a renewable source, you can but it anywhere with sunlight

disatvantage= it cost a lot to place/replace, it uses a lot of different materials

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3 years ago

What did thomson discover?

nirvana33 [79]

Answer:

B) the electron

Explanation:

JJ Thompson discovered the model for electron

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3 years ago