1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kolezko [41]
3 years ago
7

Calculate the mass of 1.9 • 10^24 atoms of Pb

Chemistry
1 answer:
Marrrta [24]3 years ago
7 0

Answer:

65.4 is the mass for 1.9×10²⁴ atomsof Pb

Explanation:

1mol of atoms of Pb has → NA (6.02×10²³ atoms) and weighs → 207.2 g

Therefore 1.9×10²⁴ atomsof Pb may weigh (1.9×10²⁴ . 207.2) / NA = 65.4 g

You might be interested in
What is the correct equation for the reaction quotient of the following reaction? 2Fe3+(aq) + Zn(s) ⇌ 2Fe2+(aq) + Zn2+(aq)
Ira Lisetskai [31]

Explanation:

A reaction quotient is defined as the ratio of concentration of products over reactants raised to the power of their stoichiometric coefficients.

A reaction quotient is denoted by the symbol Q.

For example, 2Fe^{3+}(aq) + Zn(s) \rightleftharpoons 2Fe^{2+}(aq) + Zn^{2+}(aq)

The reaction quotient for this reaction is as follows.

            Q = \frac{[Fe^{2+}]^{2}[Zn^{2+}]}{[Fe^{3+}]^{2}}

[Zn] will be equal to 1 as it is present in solid state. Therefore, we don't need to write it in the reaction quotient expression.

3 0
3 years ago
Which of the following intermolecular forces would affect boiling point the most?
Alekssandra [29.7K]
Hydrogen Bonding will effect the boiling point the most. Let's take an example Butane a four carbon unsaturated organic compound with molecular formula C₄H₁₀ and boiling point -1 °C.

                                                H₃C-CH₂-CH₂-CH₃

Now, replace one hydrogen on terminal carbon with -OH group and convert it into Butanol.

                                                H₃C-CH₂-CH₂-CH₂-OH

The Boiling point of Butanol is 117.7 °C. This increase in boiling point is due to formation of hydrogen bondings between the molecules of Butanol. 
5 0
3 years ago
Help this is my test
miss Akunina [59]

Answer:

the answer is v and z. you can see the pic

7 0
3 years ago
Read 2 more answers
gas-to-liquid synfuel production can produce diesel, naptha and paraffin. The formation of these products usually involves _____
steposvetlana [31]
The second option is wrong

6 0
3 years ago
If the cylindrical pistons are 25.000 cm in diameter at 20.0 ∘c, what should be the minimum diameter of the cylinders at that te
attashe74 [19]
Refer to the diagram shown below.

The piston supports the same load W at both temperatures.
The ideal gas law is
pV=nRT
where
p = pressure
V = volume
n = moles
T = temperature
R = gas constant

State 1:
T₁ = 20 C = 20+273 = 293 K
d₁ = 25 cm piston diameter

State 2:
T₂ = 150 C = 423 K
d₂ = piston diameter

Because V, n, and R remain the same between the two temperatures, therefore
\frac{p_{1}}{T_{1}} = \frac{p_{2}}{T_{2}}

If the supported load is W kg, then
p_{1} =  \frac{W \, N}{ \frac{\pi}{4} d_{1}^{2}} = \frac{4W \, N}{\pi (0.25 \, m)^{2}} =  20.3718W \, Pa
Similarly,
p_{2} =  \frac{4W}{\pi d_{2}^{2}} \, Pa

\frac{p_{1}}{p_{2}} =  \frac{20.3718 \pi d_{2}^{2}}{4} = 16 d_{2}^{2}

Because p₁/p₂ = T₁/T₂, therefore
16d_{2}^{2} =  \frac{293}{423}  \\\\ d_{2}^{2} =  \frac{0.6927}{16}  \\\\ d_{2} = 0.2081 \, m

The minimum piston diameter at 150 C is 20.8 cm.

Answer: 20.8 cm diameter

8 0
4 years ago
Other questions:
  • If a sample of gold is a cube what is the length of each edge in centimeters
    13·1 answer
  • 1. How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution conta
    15·1 answer
  • The reaction described in part a required 3.65 l of sodium chloride. what is the concentration of this sodium chloride solution?
    8·1 answer
  • You dissolve 4.5 mol of potassium hydroxide to make a 2 L solution. What is the molarity of the solution?
    15·1 answer
  • A temperature of 37C is equivalent to a temperature of
    6·2 answers
  • HELP ME!!! What is the gravitational potential energy of a 200 Kg wrecking ball that is held up 25 m off the ground?
    14·1 answer
  • A boy who weighs 30 kg is skateboarding at a speed of 5 m/s. What is the boys kinetic energy?
    15·1 answer
  • If you knew the number of valence electrons in a nonmetal atom how would you determine the valence of the element. (Ignore hydro
    5·1 answer
  • Don’t skip please!!! I need help
    15·1 answer
  • Which of the following statements is true?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!