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4 years ago

12

which one is correct:. . A)Na+ is smaller than K+. B)K+ is smaller than Na+. C)As3- is smaller than Sb3-. D)Sb3- is smaller than

As3-. E)Au+ is smaler than Au3+. F)Au3+ is smaller than Au+.

2 answers:

andrew-mc [135]4 years ago

4 0

Na+ is smaller than K+
As3- is smaller than Sb3-
Au3+ is smaller than Au+

OlgaM077 [116]4 years ago

3 0

Option A is right answer that is Na is smaller than K.

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A sample of gas weighs 10.1 g and occupies a volume of 5.65 l at 60 °c and 580 torr. Identify the gas sample.

OverLord2011 [107]

The question is incomplete, here is the complete question:

A sample of gas weighs 10.1 g and occupies a volume of 5.65 L at 60 °C and 580 torr. Identify the gas sample.

(a) $CHCl_3$ (molar mass = 119.4 g/mol)

(b) $N_2O$ (molar mass = 44.02 g/mol)

(c) $SO_2$ (molar mass = 64.07 g/mol)

(d) $NH_3$ (molar mass = 17.03 g/mol)

(e) $Cl_2$ (molar mass = 70.90 g/mol)

<u>Answer:</u> The gas sample is $SO_2$ having molar mass of 64 g/mol

<u>Explanation:</u>

To calculate the molar mass of the gas, we use the equation given by ideal gas equation:

PV = nRT

Or,

$PV=\frac{w}{M}RT$

where,

P = Pressure of the gas = 580 torr

V = Volume of the gas = 5.65 L

w = Weight of the gas = 10.1 g

M = Molar mass of gas = ?

R = Gas constant = $62.36\text{ L. Torr }mol^{-1}K^{-1}$

T = Temperature of the gas = $60^oC=[60+273]K=333K$

Putting values in above equation, we get:

$580torr\times 5.65L=\frac{10.1g}{M}\times 62.364\text{ L. torr }mol^{-1}K^{-1}\times 333K\\\\M=\frac{10.1\times 62.364\times 333}{580\times 5.65}=64g/mol$

Hence, the gas sample is $SO_2$ having molar mass of 64 g/mol

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3 years ago

How would one convert 36 yd to centimeters 2.54 cm = 1 in)?

morpeh [17]

Answer:

D

Explanation:

A P E X

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3 years ago

List these compounds in order of decreasing carbon–carbon bond strength: hcch, h2cch2, h3cch3. rank from strongest to weakest.

ycow [4]

The strongest bond strength is of HCCH (Ethyne), then comes H₂CCH₂ (Ethene) and H₃CCH₃ (Ethane) has the least bond strength as compare to Ethyne and Ethene.

HCCH > H₂CCH₂ > H₃CCH₃
Strongest ----------------------------------------------> Weakest

Explanation:
Ethyne has triple bond, one sigma bond and two pi bonds, Hence, a greater overlap is found between two carbon atoms which resulted in shortening the bond length (i.e 1.9 Angstrome). Also carbon carbon triple bond has highest force constant value i.e 15 ×10⁵ dyne/cm which is greater than carbon carbon double bond (10 ×10⁵ dyne/cm) and single bond (5 × 10⁵ dyne/cm).

7 0

4 years ago

separating a solid from a liquid by evaporating is called _____ a) filtration b) condensation c) solution d) distillation

tatiyna

D) Distillation is the process used to separate a solid from a liquid through <span>evaporating the liquid..</span>

8 0

4 years ago

Read 2 more answers

For a particular redox reaction, NO-2 is oxidized to NO-3 and Ag+ is reduced to Ag . Complete and balance the equation for this

Salsk061 [2.6K]

The following are the steps to complete and balnce the equation for the given reaction

<u>Explanation:</u>

We are given, NO2– is oxidized to NO3– and Ag is reduced to Ag

NO2– + Ag+ -----> NO3– + Ag(s)

Step 1) Assign the oxidation state to each element reaction

NO2– + Ag+ -----> NO3– + Ag(s)

N= +3 N = +5

O = -2 O = -2

Ag = +1 Ag = 0

NO2– -----> NO3– ………oxidation half reaction

Ag+ -----> Ag(s) ……….reduction half reaction

Step 2) Balance the element other than O and H

NO2– -----> NO3–

Ag+ -----> Ag(s)

Step 3) Balance the O by adding 1 H2O for 1 O

NO2– + H2O -----> NO3–

Ag+ -----> Ag(s)

Step 4) Balance the H by adding H+

NO2– + H2O -----> NO3– + 2H+

Ag+ -----> Ag(s)

Step 5) Balance the charge by adding electron

NO2– + H2O -----> NO3– + 2H+ + 2e-

Ag+ + 1e------> Ag(s)

Step 6) Balance the electron in both half reaction

NO2– + H2O -----> NO3– + 2H+ + 2e-

2 Ag+ + 2e------> 2 Ag(s)

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3 years ago