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kvv77 [185]
3 years ago
11

Which of the following elements form cations (positively charged ions) readily? C, O, Na, Fe, As, Br, K

Chemistry
2 answers:
pentagon [3]3 years ago
8 0

e. Na, Fe, K

Explanation:

The elements that will form cations readily are Na, Fe and K.

This is because metals are generally electropositive in nature.

  • Cations are positively charged ions that will readily want to lose their electrons.
  • This is opposed to anions that readily wants to gain electrons.
  • An atom that readily loses electrons is said to be electropositive and have a metallic character.
  • Na, Fe and K are metals and will readily lose electrons.

learn more:

Metals and non-metals brainly.com/question/2758034

#learnwithBrainly

const2013 [10]3 years ago
4 0

Answer:

e. Na, Fe, K

Explanation:

The group of elements that will be positive charge ions is metal. You can find metal in the first 2 columns of the periodic table and in the transition area. Natrium/sodium (Na), iron (Fe), and kalium/potassium(K) categorized as metal and they will form positive charge ions.  

On the other hand carbon(C),  oxygen (O), arsenic(As) and bromine(Br) is gas and will form negative charge ions. Gas located on the right side of the periodic table.

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2.
zlopas [31]

Answer:

A. modern organisms closely resembling fossils

Explanation:

Fossils are defined as the preserved remains or traces of living organisms from past.

Fossils are considered as an evidence for evolution because they represent the existence of life on earth and shows the difference between the life in past that life on earth today. With the help of fossil, it is easy to determine the age of fossils which further help to determine that how modern organisms have evolved from the past.

Hence, the correct answer is "A. modern organisms closely resembling fossils".

7 0
3 years ago
If You are given 14 moles of C2H5OH(Ethanol) and 13 moles of O2( Oxygen), how
kenny6666 [7]

Explanation:

1 ) first u have to balance the equation but in this case it is already balanced.

2) checking for the limiting reactant:

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol of H2O

14 mol of ethanol × (1mol H2O/ 1molof ethanol) = 14 mol of H2O

the less amount of moles produced from the O2 so the limiting reactant is oxygen

3) calculating the products moles

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol

13 mol O2 × (1mol Ch3Cooh / 1mol O2) = 13 mol

note: the ratios obtained from the balanced equation

4) the excess reagent is the ethanol 1 mol will be remain

3 0
3 years ago
An empty plastic or glass dish being removed from a microwave oven can be cool to the touch, even when food on an adjoining dish
Murljashka [212]

Answer:

See explanation

Explanation:

Microwaves work by flipping water molecules upside down, then right side up again, and so on at very high speeds, and the friction generates heat. Some glass or plastic isn't affected by the microwaves, so the molecules don't get flipped, and so no friction occurs and no heat is produced, leading to the dish not being heated up.

3 0
2 years ago
What does an atomic emission spectrum look like if the electrons energy levels in an atom were not quantizied
balandron [24]

Answer:

b

Explanation:

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3 years ago
It has been hypothesized that a chemical known as BW prevents colds. To test this hypothesis, 20,000 volunteers were divided int
Amiraneli [1.4K]

Grams of BW

i think thats irtu9rgirg

8 0
3 years ago
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