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
mariarad [96]
3 years ago
8

A cylindrical piece of metal is 4.5 dm in height with radius of 5.50 x 10^-5 km.

Chemistry
1 answer:
adell [148]3 years ago
8 0

Answer:

a) V=4.3x10^3mL

b) V=4.3x10^6mm^3

c) \rho=1.5x10^5g/L

Explanation:

Hello,

a) In this case, the given height in cm is:

h=4.5dm*\frac{1m}{10dm}* \frac{100cm}{1m}=45cm

And the radius in cm is:

r=5.50x10^{-5}km*\frac{1000m}{1km}*\frac{100cm}{1m}=5.5cm

Thus, the volume in cubic centimeters which is also equal in mL (1cm³=mL) is:

V=\pi (5.5cm)^2*45cm\\\\V=4.3x10^3cm^3=4.3x10^3mL

b) In this case, the given height in mm is:

h=4.5dm*\frac{1m}{10dm}* \frac{1000mm}{1m}=450mm

And the radius in mm is:

r=5.50x10^{-5}km*\frac{1000m}{1km}*\frac{1000mm}{1m}=55mm

Thus, the volume in cubic millimeters is:

V=\pi (55mm)^2*450mm\\\\V=4.3x10^6mm^3

c) Finally, since 1000 mL equal 1 L, the required density in g/L turns out:

\rho=\frac{m}{V}=\frac{6.54x10^5g}{4.3x10^3mL}*\frac{1000mL}{1L}\\   \\\rho=1.5x10^5g/L

Best regards.

You might be interested in
A student mixes two solutions, planning to produce a chemical reaction. Which of the following is evidence that no chemical reac
iogann1982 [59]

Answer:

where is the evidance?

Explanation:

7 0
3 years ago
If you breathe out 0.3 moles of carbon dioxide, how many molecules of carbon dioxide did you breathe out?
pochemuha

Explanation:

1 mole of C molecules contain=6.023×10^23

0.3 moles of C=6.023×10^23/1×0.3

=1.8×10^23 of C molecules

sorry..not sure

4 0
2 years ago
Which is a characteristic of atoms?
frez [133]

Answer:

Fuente: https://www.caracteristicas.co/atomo/#ixzz6xnrNkElS

Explanation:

7 0
3 years ago
Read 2 more answers
Ethyl acetate reacts with H2 in the presense of a catalyst to yield ethyl alcohol: C4 H8O2(l) +H2(g)-------> C2H6O6(l)
Cerrena [4.2K]

(a) 1 mole of ethyl acetate will react with 2 moles of hydrogen to produce 2 moles of ethyl alcohol

(b) 3 moles of ethyl alcohol

(c) 138 g of ethyl alcohol

(d) 12.5 g of ethyl alcohol

(e) 0.544 g of hydrogen

Explanation:

(a) You may find the balanced chemical equation in the attached picture, where 1 mole of ethyl acetate will react with 2 moles of hydrogen to produce 2 moles of ethyl alcohol.

(b) Knowing the balanced chemical equation, we devise the following reasoning:

if        1 mole of ethyl acetate produces 2 moles of ethyl alcohol

then   1.5 moles of ethyl acetate produces X moles of ethyl alcohol

X = (1.5 × 2) / 1 = 3 moles of ethyl alcohol

(c) From the point (b) we know that 1.5 mol of ethyl acetate produces 3 moles of ethyl alcohol.

mass = number of moles × molecular weight

mass of ethyl alcohol = 3 × 46 = 138 g

(d) number of moles = mass / molecular weight

number of moles of ethyl acetate =  12 / 88 = 0.136 moles

Now from the balanced chemical reaction we deduce that:

if        1 mole of ethyl acetate produces 2 moles of ethyl alcohol

then   0.136 moles of ethyl acetate produces X moles of ethyl alcohol

X = (0.136 × 2) / 1 = 0.272 moles of ethyl alcohol

mass = number of moles × molecular weight

mass of ethyl alcohol = 0.272 × 46 = 12.5 g

(e) We know from point (d) that 12 g of ethyl acetate are equal to 0.136 moles of ethyl acetate.

Taking in account the chemical reaction, we know that:

if        1 mole of ethyl acetate react with 2 moles of hydrogen

then  0.136 moles of ethyl acetate will react with Y moles of hydrogen

Y = (0.136 × 2) / 1 = 0.272 moles of hydrogen

mass = number of moles × molecular weight

mass of hydrogen (H₂) = 0.272 × 2 = 0.544 g

Learn more about:

moles

brainly.com/question/4160077

brainly.com/question/1445383

brainly.com/question/2499283

#learnwithBrainly

5 0
3 years ago
Which two activities are practical applications of magnetism?
wolverine [178]

Answer:

Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.

Explanation:

Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.

7 0
2 years ago
Other questions:
  • Cr + 3fe3+cr3+ + 3fe2+ in the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced,
    6·1 answer
  • How many joules of heat are removed from a 21.0 g sample of water if it is cooled from 34.0°C
    7·1 answer
  • Help please ! ASAP !
    5·1 answer
  • What does the number on the top left of the symbol show?
    13·2 answers
  • Noble gas notation for platinum
    5·1 answer
  • Select the correct answer.
    5·2 answers
  • A pH scale has how many sections on it?
    14·1 answer
  • How many molecules of carbon dioxide would be formed if 6.75 g of propane is burned in the following reaction?
    13·1 answer
  • How will we know that a chemical reaction happened if we cant see atoms??
    15·1 answer
  • What is the mass percentage of C in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!