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tresset_1 [31]
3 years ago
10

Write a word or phrase begining with each letter of the word CHANGE that describes changed you have observed in everyday objects

.
Chemistry
1 answer:
ipn [44]3 years ago
6 0
C – coming to senses and finally realized that everything is dynamic and I should learn to invest into knowing what of these changes are right or wrong and being

H – hopeful that someday, these changes will actually make sense and that all of these questions and confusions will be answered in the right time and the right place. But whatever happens, I must learn to

A – adapt from the different things I see everyday, If the world changes for its betterment or for its worse, then I too, should change as well to go with the flow. However, keep in mind to

N – never leave the small things behind because these things when summed up actually what make sense of everything and could possibly answer the

G – growing dynamics of the world and its inhabitants. Throughout all this, it is always important to
<span>
E-educate yourself, that when the change will finally take effect on you, you will be ready.</span>
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Lead (Pb) is used to make a number of different alloys. What is the mass of lead present in an alloy containing 0.15 mol of lead
Vesna [10]
Lead is 207.2 g/mol.
0.15 mol (\frac{207.2g}{mol}) = 31.08 g Pb
3 0
3 years ago
An FAS calibration curve (absorbance, y-axis vs. FAS in g/mL) gave an equation he regression line of: y-3678(x)+0.056. If an unk
mezya [45]

Answer:

FAS concentration = 1.61*10^-4M

Explanation:

Beer Lambert's law relates the absorbance (A) of a substance to its concentration (c) as:

A = \epsilon lc----(1)

where ε = molar absorption coefficient

l = path length

A plot of 'A' vs 'c' gives a straight line with slope = εl

In addition absorbance (A) is related to % Transmittance (%T) as:

A = 2-log%T----(2)

For the FAS solution, the corresponding calibration fit is given as:

y = 3678(x) + 0.056

This implies that the slope = εl = 3678

It is given that %T = 25.6%

A = 2-log(25.6)=0.592

Based on equation(1):

c = \frac{A}{\epsilon l}=\frac{0.592}{3678}=1.61*10^{-4}M

8 0
3 years ago
= 25 X 5 = (use the correct number of sig figs)
Anton [14]

Answer:

1.25 *10^2

Explanation:

25*5 = 125

= 1.25 *10^2

5 0
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Which of the data sets qualitative data?
Kaylis [27]

Answer:

Uh, the second one?

Explanation:

Try to restate the question please.

3 0
3 years ago
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barxatty [35]
The frequency stays the same it just gets louder
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