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Alexxx [7]
4 years ago
15

Manuel's teacher asked the class to make a wet mount slide of their cheek cells. Manuel followed these procedures after scraping

his mouth with a toothpick before observing the cells. 1. rubbed toothpick in water drop on glass microscope slide 2. placed slide on microscope stage 3. held slide in place with stage clips 4. first turn nose piece so low power objective was positioned over slide In this sequence of tasks, what important step did Manuel forget?
A) cover the water drop with a cover slip
B) raise the objective as high as possible
C) use cloth or lab coat to wipe lens in eye piece
D) turn nose piece so high power objective is over water drop
Chemistry
2 answers:
Alenkinab [10]4 years ago
7 0
A because if you don’t cover the water drop with a cover slip then it want work
Alexandra [31]4 years ago
7 0
Manuel forgot to cover the water drop with a cover slip.<span> He should should've done this before trying to place the slide down on the stage.</span>
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What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?
Marina CMI [18]
Nuclear fusion and nuclear fission are two different types of energy-releasing reactions that occur in the nuclei of an atom.
Here are the major differences between the two:

1. To differentiate the two, fission is the splitting of an atom into two or more smaller atoms while fusion is the conjoining or fusion of two or smaller atoms into larger one.

2.  Fission does not normally occur in nature while fusion occurs mostly in heavenly bodies such as the stars.

3.Fission produces highly radioactive particles that can be hazardous to both the living things and its habitat or environment while fusion is "clean energy" and "environmental friendly" meaning there are fewer radioactive particles are produced. But if a fission "trigger" is being used, there will  be radioactive particles produced.

Among the two nuclear changes, fission is widely used because this reaction produces heat in nuclear reactor. This heat is used to generate steam which operates the turbines to eventually produce electricity.
8 0
4 years ago
11. A 4.175 gram sample of a certain hydrate of copper (II) sulfate, CuSO,• xH,O, is heated until all
Wewaii [24]

The  formula of the hydrate = CuSO₄• 3H₂O

<h3>Further explanation</h3>

Given

4.175 grams sample CuSO₄• xH₂O

3.120 grams anhydrous compound CuSO₄

Required

The formula

Solution

mass of H₂O driven off :

= 4.175 - 3.12

= 1.055 g

MW CuSO₄ = 159.5 g/mol

MW H₂O = 18 g/mol

mol ratio of CuSO₄ : H₂O :

= 3.12/159.5 : 1.055/18

= 0.01956 : 0.05861

= 1 : 3

3 0
3 years ago
the atomic number tells you the number of _______ in one atom of an element. It also tells you the number of ______ in a neutral
uysha [10]

Answer:

Protons, electrons, same in that order is the answer.

Explanation:

this has to do with the periodic table information.

5 0
3 years ago
NHCI(s) = NH3(g) + HCl(g) at 427°C, Kp = 4.8. Calculate Kc​
eduard

\tt Kp=Kc(RT)^{\Delta n}

NH₄Cl (s) ⇔ NH₃ (g) + HCl (g)

Δn = 2 (gas only)

R = 0.082

T = 427 + 273 = 700 K

4.8 = Kc (0.082 x 700)²

Kc = 1.45 x 10⁻³

7 0
2 years ago
What is the kinetic energy of a 3kg ball that is rolling at 2 meters per second
marissa [1.9K]

Answer:

<h2>6 J</h2>

Explanation:

The kinetic energy of an object can be found by using the formula

k =  \frac{1}{2} m {v}^{2}  \\

m is the mass

v is the velocity

From the question we have

k =  \frac{1}{2}  \times 3 \times  {2}^{2}  \\  =  \frac{1}{2}  \times 3 \times 4 \\  = 3 \times 2

We have the final answer as

<h3>6 J</h3>

Hope this helps you

7 0
3 years ago
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