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andre [41]
2 years ago
14

Why were microscopes essential in the discovery of cells

Chemistry
2 answers:
fredd [130]2 years ago
8 0

Answer: hey nice to see you again, the answer is B. Microscopes allowed scientists to see the cells.

Explanation:

lana66690 [7]2 years ago
8 0

Answer:

C I believe if that's wrong then it's A. :)

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Which element is oxidized in the reaction below? fe(co)5 (l) + 2hi (g) fe(co)4i2 (s) + co (g) + h2 (g)?
DanielleElmas [232]
Oxidation state of I is (-1) and for CO it is zero. Let's assume that the oxidation state of Fe in Fe(CO)₄I₂<span> (s) is x. For whole compound, the charge is zero.

Sum of oxidation numbers in all elements = Charge of the compound.

Here we have 1Fe , 4CO and 2I
hence we can find the oxidation state as;
 x + 4*0 + 2*(-1) = 0
 x + 0 - 2            = 0
                   x     = +2
Hence the oxidation state of Fe in product </span>Fe(CO)₄I₂ (s) is +2.

Same as we can find the oxidation state (y) of Fe in Fe(CO)₅(s).
y + 5*0 = 0
   y        = 0

Since oxidation state of Fe increased from 0 to +2, the oxidized element is Fe in the given reaction.
5 0
3 years ago
Which method would you use to separate rice grains, which have accidentally been mixed with flour
ale4655 [162]

Answer:

I would sieve them because the flour will go through but not the rice

Explanation:

6 0
3 years ago
Read 2 more answers
Answer all of them free brainlest
sergiy2304 [10]

Answer:

1

Explanation:

2

3 0
3 years ago
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Pls help it’s due tomorrow morning need you help as soon as possible!! ;) ❤️ Thanks
IrinaVladis [17]

Answer:

I have solved your problem

Explanation:

6 0
3 years ago
4 g of X2O3, an oxide of efement X, contains 2.8 g of X. How many moles of X<br> are there?
ziro4ka [17]

Moles of X are 0.925 moles.

A mole is a totally vital unit of dimension that chemists use.The mole, symbol mol, is the unit of amount of substance inside the worldwide device of gadgets. the amount quantity of the substance is a measure of how many simple entities of a given substance are in an item or sample. The mole is described as containing exactly 6.02214076×10²³ primary entities

mass  of X2O3 = 4 g

so moles = mass/molar mass

molar mass  of X2O3 =  2*X + 48 -

Given, that the mass of X = 2.8g

        mass of O = 4 - 2.8 = 1.2g

A mole of O = 1.2g/16 = 0.075 mole

∴ mole of X = 1 - 0.075 = 0.925 moles.

Learn more about moles here:-brainly.com/question/15356425

#SPJ9

4 0
1 year ago
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