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3 years ago

Which is a property of matter that you CANNOT observe just by looking at an object?

Chemistry

2 answers:

Sedaia [141]3 years ago

7 0

Answer:b

Explanation:

Scorpion4ik [409]3 years ago

5 0

Answer: temperature

Explanation:

If you see a hot red ball then you know the color, red, and the shape, a ball, but you don’t know it’s hot.

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Rank the following aqueous solutions from highest to lowest freezing point: 0.1 m FeCl3, 0.30 m glucose (C6H12O6), 0.15 m CaCl2.

Tresset [83]

Answer:

Explanation: See images below for explanation

8 0

4 years ago

It’s about the periodic table of elements

Pie

Yes what the other person said can I plz get an thanks

3 0

3 years ago

If aluminum is diffused into a thick slice of silicon with no previous aluminum in it at a temperature of 1100˚C for 8 hours, wh

RideAnS [48]

Answer:

8.354 nanometers

Explanation:

To treat a diffusive process in function of time and distance we need to solve 2nd Ficks Law. This a partial differential equation, with certain condition the solution looks like this:

$\frac{C_{s}-C{x}}{C_{s}-C_{o}}=erf(x/2\sqrt{D*t})$

Where Cs is the concentration in the surface of the solid

Cx is the concentration at certain deep X

Co is the initial concentration of solute in the solid

and erf is the error function

Then we solve right side,

$\frac{C_{s}-C{x}}{C_{s}-C_{o}}=\frac{1018atoms/cm3-1016atoms/cm3}{1018atoms/cm3}=0.001964$

And we need to look up the inverse error function of 0.001964 resulting in: 0.00174055

Then we solve for x:

$x=0.00174055*2*\sqrt{D*t} =0.00174055*2*\sqrt{2*10^{-12}cm^{2}/s*8h*3600s/h}=8.35464*10^{-7}cm$

6 0

3 years ago

A compound has the empirical formula ch and a formula mass of 52.10 amu. part a what is the molecular formula of the compound?

Sever21 [200]

<span>C4H4 The compound in question has an equal ratio of hydrogen and carbon. The atomic weight of carbon is roughly 12 and the atomic weight of hydrogen is roughly 1. The mass of the compound in question is roughly 52. 52/13=4 C4H4</span>

3 0

3 years ago

Read 2 more answers

What term refers to the small parts of a cell that carry out different functions?

deff fn [24]

That would be C. Organelles

4 0

4 years ago