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
Serggg [28]
3 years ago
10

Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of

8.80 g/cm3 and containing 0.073% Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 2.50mm thick and has a 2.50-cm-diameter hole drilled through its center such that the height of the hole is 2.50mm .
The silicon in the plate is a mixture of naturally occurring isotopes. One of the those isotopes is silicon-30, which has an atomic mass of 29.97376 amu and a percent natural abundance of 3.10%
Chemistry
1 answer:
klemol [59]3 years ago
4 0
<span>To find the volume of the plate without accounting for the hole firstly
V = (15.0 cm)(12.5 cm)(0.250 cm) = 46.875 cm^3
and the volume of the hole is
(pi)(1.25 cm)^2(0.250 cm) = 1.2272 cm^3
we will subtract the volume of the hole from the rest 45.648 cm^3
the multiply this by the density of the alloy to find the mass
(8.80 g/cm^3)(45.648 cm^3) = 401.701 g.
0.044% of this is Si, so (0.00044)(401.701 g) = 0.17675 g is silicon.
by the number of atoms and using average atomic mass of silicon and Avogadro's number to find the number of silicon atoms:
(0.17675 g)(1 mol/28.0855 g)(6.022E23 atoms/1 mol) =3.794E21atoms of Si
3.10% of these are Si-30:(0.0310)(3.794E18 atoms)=1.176E20 atoms of Si-30 and with two significant figures, 1.2E20 atoms.
hope this helps
</span>
You might be interested in
calculatorn the past, many students have listed that the accidental addition of too much acetic acid contributed greatly to the
Tresset [83]
Is that supposed to be a paragraph
6 0
3 years ago
Scientists use what properties to help them identify and classify matter
Volgvan
Scientists use the physical and chemical properties to help them identify and classify matter. These physical and chemical properties are in a macro-perspective, in which these matter contains compounds, elements and atoms. Hence, matter can be classified in various ways, <span><span>
1.    </span>Atomic number either atomic mass each element has</span> 
<span><span>2.    </span>By substance of that matter either pure substance or mixed substance</span> <span>
3.    If they cannot reduce a certain substance into a much smaller quantified atomic structure then they they’ll use (2) to identify and classify it.</span>
5 0
3 years ago
Which of the following describes the electron sharing between two oxygen atoms? Each oxygen shares one electron with the other.
Troyanec [42]
I believe each oxygen shares 2 elections with the other.
5 0
2 years ago
Read 2 more answers
If a reaction is not spontaneous, what is true of the reaction?
Murrr4er [49]
Spontaneous = exothermic. If it is not spontaneous, it is endothermic. ΔG > 0, which means that the reaction uses energy instead of emitting it. 
5 0
3 years ago
What are the similarities and differences between a camera and a camera and the human eye?
Sunny_sXe [5.5K]
So a camera can zoom in and out and the human eye has peripheral vision
4 0
3 years ago
Read 2 more answers
Other questions:
  • How are landforms and faults related
    11·1 answer
  • List the number of each type of atom on the right side of the equation pb(no3)2(aq)+2nacl(aq)→pbcl2(s)+2nano3(aq)
    6·2 answers
  • Pls pls I need help to solve this questions
    15·1 answer
  • The end point of a titration was reached after 22 ml of 0.050 m disodium edta titrant was dispensed into a solution containing t
    10·2 answers
  • Iron(II) can be oxidized by an acidic K2Cr2O7 solution according to the net ionic equation: Cr2O72− + 6Fe2+ + 14H+ → 2Cr3+ + 6Fe
    12·1 answer
  • Determine la fórmula empírica de un compuesto que contiene:
    14·1 answer
  • What is the symbol for the ion that contains 12 protons, 10 electrons, and 12 neutrons?
    6·1 answer
  • Why are allergic reactions often
    5·1 answer
  • All of the halogens, group 17, have seven valence electrons. which of these would represent the oxidation number of the halogens
    12·1 answer
  • PLZZ HELP!! If light traveling through air is then passed through glass, what is the result?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!