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
zzz [600]
3 years ago
7

How many moles are in 98.17 g of osmium?​

Chemistry
1 answer:
Nata [24]3 years ago
6 0

Answer:

0.5161 mol Os

Explanation:

Step 1: Find molar mass

Os (Osmium) - 190.2 g/mol

Step 2: Use Dimensional Analysis

98.17 \hspace{3} g \hspace{3} Os(\frac{1 \hspace{3} mol \hspace{3} Os}{190.2 \hspace{3} g \hspace{3} Os} ) = 0.516141 mol Os

Step 3: Simplify

We have 4 sig figs

0.516141 mol Os ≈ 0.5161 mol Os

You might be interested in
8. Balance the following nuclear equations:<br> ^65/30Ca -&gt; ^65/29Sc +_______
a_sh-v [17]

Explanation:

          ⁶⁵₃₀Ca   →   ⁶⁵₂₉Sc  +   ⁿₓH

The reaction above is nuclear reaction.

In a nuclear reaction, the mass number and atomic number must be conserved.

The mass number is the superscript before the atom

Atomic number is the subscript before the atom

  Conserving mass number:

       65 = 65 + n

        n = 0

   conserving atomic number:

    30 = 29 + x

     x = 1

The unknown atom is a positron i.e a positively charged electron:   ⁰₁e

              ⁶⁵₃₀Ca   →   ⁶⁵₂₉Sc  +  ⁰₁e

learn more:

Transmutation brainly.com/question/3433940

#learnwithBrainly

3 0
3 years ago
Which statement is true? (2 points) Select one: a. Geothermal power plants use the renewable resource of heat from within the Ea
love history [14]

The correct answer is A, since it is the only sensible answer.

5 0
3 years ago
A participant took 5.2 hours to complete a marathon. How many minutes did the participant take to complete the marathon? Use 1 h
Jet001 [13]
The participant took 312 minutes
8 0
3 years ago
Read 2 more answers
What is created when an acid is mixed with a base?
Arturiano [62]

Answer:

If you mix equal amounts of a strong acid and a strong base, the two chemicals essentially cancel each other out and produce a salt and water. Mixing equal amounts of a strong acid with a strong base also produces a neutral pH (pH = 7) solution.

8 0
3 years ago
Pyridine (c5h5n) is a particularly foul-smelling substance used in manufacturing pesticides and plastic resins. calculate the ph
zubka84 [21]

Answer is: ph value of pyridine solution is 9.1.

Chemical reaction: C₅H₅N + H₂O → C₅H₅NH⁺ + OH⁻.<span>
c(pyridine - C</span>₅H₅N) = 0.115M.<span>
Kb(C</span>₅H₅N) = 1.4·10⁻⁹.
[C₅H₅NH⁺] = [OH⁻] = x; equilibrium concentration.<span>
[</span>C₅H₅N] = 0.115 M - x.

Kb = [C₅H₅NH⁺] · [OH⁻] / [C₅H₅N].

1.4·10⁻⁹ = x² / (0.115 M -x)

Solve quadratic equation: x = [OH⁻] = 0.0000127 M.<span>
pOH = -log(0.0000127 M) = 4.9</span>

<span>pH = 14 - 4.9 = 9.1.</span>

7 0
3 years ago
Other questions:
  • Why do we use gold and silver to make jewellery?
    11·1 answer
  • Mr.Davies has requested that you wait for 10 more minutes is that informal or formal
    11·2 answers
  • What element is in group 17 and period 2 of the periodic table?
    14·1 answer
  • How would the consumption of antacid (sodium bicarbonate) affect urine pH?
    6·1 answer
  • Match the correct term with its definition. The color of the powder of a mineral. Answer 1 The sinking of one lithospheric plate
    5·1 answer
  • A piece of brass is found to have a mass of 24.32 g. When placed in a graduated cyclinder with an initial reading of 5.60 mL the
    14·1 answer
  • What is the primary source of energy for most ecosystems
    13·2 answers
  • The reaction 2Fe + 3Br2 ———&gt; 2FeBr3 is an example of which type of reaction
    10·1 answer
  • Frozen CO2 or dry ice is different from CO2 gas in the atmosphere because it has
    8·2 answers
  • Topic 2 - Evidence Ticket
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!