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3 years ago

Which is NOT part of a normal microscope? a.ocular b. nosepiece c.stage d.objective

Chemistry

2 answers:

kozerog [31]3 years ago

6 0

Answer:

Nose piece

Explanation:

I have never seen one on a normal microscope

Evgesh-ka [11]3 years ago

3 0

Answer:

I believe it is a Nose piece

Explanation:

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The elements in the periodic table are arranged in order of

Alenkinab [10]

Answer:

dsgadsagsdgsd

Explanation:

5 0

3 years ago

Consider the following reaction where Kc = 154 at 298 K.2NO(g) + Br2(g) 2NOBr(g)A reaction mixture was found to contain 4.64×10-

IgorLugansk [536]

Answer:

The reaction is not at equilibrium and reaction must run in forward direction.

Explanation:

At the given interval, concentration of NO = $\frac{4.64\times 10^{-2}}{1}M=4.64\times 10^{-2}M$

Concentration of $Br_{2}$ = $\frac{4.56\times 10^{-2}}{1}M=4.56\times 10^{-2}M$

Concentration of NOBr = $\frac{0.102}{1}M=0.102M$

Reaction quotient, $Q_{c}$ , for this reaction = $\frac{[NOBr]^{2}}{[NO]^{2}[Br_{2}]}$

species inside third bracket represents concentrations at the given interval.

So, $Q_{c}=\frac{(0.102)^{2}}{(4.64\times 10^{-2})^{2}\times (4.56\times 10^{-2})}=106$

So, the reaction is not at equilibrium.

As $Q_{c}< K_{c}$ therefore reaction must run in forward direction to increase $Q_{c}$ and make it equal to $K_{c}$ .

4 0

3 years ago

How many moles of Manganese there in are 5.76 x 10(15) atoms of Mn?

aksik [14]

Answer:

1. 9.57 × 10^-9 moles.

2. 7.38mol

Explanation:

1.) To find the number of moles there are in the number of particles in an atom, we divide the number of particles (nA) by Avagadro's constant (6.02 × 10^23)

Hence, to find the number of moles (n) of Manganese (Mn), we say:

5.76 x 10^15 atoms ÷ 6.02 × 10^23

5.76/6.02 × 10^(15-23)

= 0.957 × 10^-8

= 9.57 × 10^-9 moles.

2.) Mole = mass/molar mass

Molar mass of sodium chloride (NaCl) = 23 + 35.5

= 58.5g/mol

mole = 431.6 g ÷ 58.5g/mol

mole = 7.38mol

7 0

3 years ago

Discuss the reason for the presence of large number of organic compounds

jeyben [28]

Answer:

Carbon forms the large numbers of compound due to the following reasons

4 0

3 years ago

The idea that the behavior of the states of matter is determined by the kinetic energy and movement of their particles is called

Savatey [412]

Answer:

C . Kinetic Molecular Theory

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3 years ago