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Monica [59]
3 years ago
7

Which microscope uses electrons to study the surface of an object?

Chemistry
1 answer:
professor190 [17]3 years ago
8 0
Scanning Electron Microscope (SEM)
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Use scientific notation to express 3.76 mg in grams
makkiz [27]
There are 1000 mg in 1 gram.
3.76/1000 = 0.00376

10^-3 = 0.001

0.001 x 3.76 = 0.00376

Answer is 
3.76 x 10^-3
7 0
3 years ago
How many elements in C6H12O6
zysi [14]

Answer:

3

Explanation:

there are 3 different elements in sugar. just add up all the letters you see

8 0
3 years ago
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Is the heart made up of at least 3 types of cells
Vilka [71]

Answer:

The human heart contains an estimated 2–3 billion cardiac muscle cells, but these account for less than a third of the total cell number in the heart.

Explanation:

the human heart Structure. There are two types of cells within the heart: the cardiomyocytes and the cardiac pacemaker cells. Cardiomyocytes make up the atria (the chambers in which blood enters the heart) and the ventricles (the chambers where blood is collected and pumped out of the heart).

8 0
4 years ago
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A sample of pure NO2 is heated to 335 ∘C at which temperature it partially dissociates according to the equation 2NO2(g)⇌2NO(g)+
vodka [1.7K]

The equilibrium constant for the reaction is 0.00662

Explanation:

The balanced chemical equation is :

2NO2(g)⇌2NO(g)+O2(g

At t=t  1-2x ⇔ 2x + x moles

The ideal gas law equation will be used here

PV=nRT

here n= \frac{w}{W} = \frac{w}{V}= density

P = \frac{density RT}{M}       density is 0.525g/L, temperature= 608.15 K, P = 0.750 atm

putting the values in reaction

0.75 = \frac{0.525 x 0.0821 x 608.15 }{M}

  M    = 34.61

         

to calculate the Kc

Kc=\frac{ [NO] [O2]}{NO2}

  \frac{1-2x}{1+x} x M NO2 + \frac{2x}{1+x} M NO+ \frac{x}{1+x} M O2

Putting the values as molecular weight of NO2, NO,O2

\frac{46(1-2x) +30(2x)+32x}{1+x}

34.61= \frac{46}{1+x}

x= 0.33

Kc= \frac{4x^2)x}{1-2x^2}

    putting the values in the above equation

Kc = 0.00662

     

5 0
3 years ago
In a neutralization reaction of a strong acid and strong base, what will the end pH be?
matrenka [14]
The end pH will be 7 if the acid and base were added in the correct amounts in relation to each other.
general formula:
HA+BOH⇒H₂O+AB  (AB is the salt produced from the anion in the acid and cation in the base)
7 0
3 years ago
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