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Svetradugi [14.3K]
3 years ago
5

Can someone please help answer these two following things for me. I will give brainiest for an accurate answer. I’ve been postin

g this question several of times and no one has yet answered but please do, this is URGENT

Chemistry
1 answer:
Reptile [31]3 years ago
6 0

Answer:

the iron alone was dark brown and rectangular, whereas the iron-sulfur combination was a dark gray powder.

Explanation:

i hope it helps :) but I answered your questions 2X hehe

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H₃C-Ç=CCH₃<br>сна сHз (what is the name of this <br> chemical formula)​
algol [13]

Answer:2,3 -dimethyl-2-butenr

Explanation:

3 0
3 years ago
Why is it important for you to learn where the safety equipment is located in the lab?
Mariana [72]
It is really very important to know where the safety equipments are placed in lab because when we know it then accident wont occur in lab . it will also helps us to feel secure while doing any kinds of experiment
6 0
3 years ago
When an ice cube melts in your hand, it changes from a solid to a liquid.
djverab [1.8K]

Answer:

B. exothermic; leaving

Explanation:

The exothermic process releases heat, which causes the surrounding area to increase in temperature.

Your hand is releasing heat and makes the temperature of the ice cube increase, to where it melts.

4 0
2 years ago
If the decomposition of a sample of k c l o 3 kclox3 produces 3. 29 g of o 2 ox2 , what was the mass (g) of the original sample?
____ [38]

The mass (g) of the original sample after decomposition is 8.3983 g.

A decomposition reaction can be described as a chemical reaction wherein one reactant breaks down into or extra merchandise.

explanation:

Reaction          2KClO₃ ⇒ 2KCl + 3O₂

moles               2               2            3

molar mass    122.55        74.55    32

Given, Mass of O₂ = 3.29g ⇒ moles of O₂

                                            =  (3.29/32) = 0.1028

3 moles of O₂  produced by 2 moles of KClO₃

Therefore, 0.1028 moles of O₂  produced by (2*0.1028/3) = 0.06853 moles of Kclo₃

Mass of KClo₃ in original sample is = moles * molar mass

                                                        = 0.06853 * 122.55

                                                       = 8.3983 g

A decomposition response occurs whilst one reactant breaks down into or extra merchandise. this may be represented through the general equation: XY → X+ Y. Examples of decomposition reactions consist of the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.

Learn more about decomposition here:-brainly.com/question/27300160

#SPJ4

5 0
2 years ago
which of the following compounds would be considered an electrolyte? a. c6h12o6 b. naoh c. co2 d. agcl
AlekseyPX

Answer: B: NaOH

Explanation:

5 0
1 year ago
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