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mojhsa [17]
2 years ago
12

Which element tends to gain electrons to form an anion A. S B. Na C. Mn D. Ba

Chemistry
2 answers:
jok3333 [9.3K]2 years ago
8 0

Answer:

A.) S

Explanation:

Anions form when elements have more electrons than protons. Some elements want to gain electrons because all elements desire a full octet (8 valence electrons). That being said, some elements are closer to a full octet by gaining electrons, whereas some are closer when they give up electrons.

As a general rule, as you move to the right across the period table, the number of valence electrons an element has increases. Therefore, on the right of the periodic table, these elements have a little less than 8 valence electrons. It makes sense that these elements want to gain those last few electrons to gain a full octet, rather than giving up electrons. Sulfur (S) has 6 valence electrons (located in the 16th column). To gain a full octet, it will gain two electrons and thus become an anion.

Na, Mn, and Ba are on the left of the periodic table, so they'd rather give up electrons than gain them (to become cations).

Reptile [31]2 years ago
3 0
B it’s right answer
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A 1500 L weather balloon is at a temperature of 290 K on the ground. As it rises the
kramer

Answer:

1500/290 = x/210 = 1086.2 L

Explanation:

This problem is solved with Charles Law which says

V¹/T¹ = V²/T²

7 0
3 years ago
What is the molarity of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of 100.0 mL?
Ipatiy [6.2K]

Answer:

0.150 M

Explanation:

The molarity of the solution can be calculated using the formula;

C1V1 = C2V2

Where; C1 = initial concentration of solution

C2 = final concentration of solution

V1 = volume of initial solution

V2 = volume of final solution

According to this question, C1 = 0.200M, C2 = ?, V1 = 75mL, V2 = 100.0mL

Hence,

C1V1 = C2V2

0.200 × 75 = C2 × 100

15 = 100C2

C2 = 15/100

C2 = 0.150M

Therefore, the molarity of the final KCl solution is 0.150M

4 0
3 years ago
Multiple Select Question
Serggg [28]

The four (4) functions of water in the body are:

I. Site for many reactions.

II. Transport of nutrients and wastes.

III. Carries heat.

IV. Acts as solvent.

Water can be defined as a liquid molecule that comprises two (2) main chemical elements, which are hydrogen and oxygen in the ratio of two to one (2:1).

Generally, water is considered to be an important and essential chemical molecule that aids in the growth and development of the body of living organisms. The four (4) functions of water in the body of a living organism are:

  • It is typically a site for many reactions.
  • It helps in the transportation of nutrients and wastes around the body.
  • It carries heat from a hot region.
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Read more: brainly.com/question/19695951

7 0
3 years ago
Calculate pressure (at STP) in 10.0 L vessel after reaction of 1.0 L hydrochloric acid (concentration 35 % and density 1.28 g/cu
SCORPION-xisa [38]

Answer:

The pressure in the vessel is 13,3 atm.

Explanation:

2 HCl (aq)+ CaCO₃ (s) → CaCl₂(aq)+ H₂O(l)+ CO₂(g)

The increase in the pressure of the vessel after the reaction is by formation of a gas (CO₂). So we have to find the produced moles of this gas and apply the gas ideal law to find the pressure.

We have to find the limit reactant, to do so, we have to calculate the moles of each reactant in the reaction, the one that have the less moles will be the limit reactant:

HCl:

1,0L × (35/100) × (1000 cm³/1L) × (1,28 g/ 1cm³) × (1mol HCl/ 36,46 g) ÷ 2mol

<em>(Concentration)      (L to cm³)         (cm³ to g)      (g to mol)  (moles of reaction)</em>

moles of HCl= 6,14 mol

CaCo₃:

   1,0 kg     ×       (96/100)                ×   (1000 g/1kg) × (1 mol/100,09g)

<em>(Limestone) (CaCo₃ in limestone)          (kg to g)            (g to mol) </em>

moles of CaCo₃= 9,59 mol

So, reactant limit is HCl

This reaction have a yield of 97%. So, the CO₂ moles are:

6,14 mol × 97÷ = 5,96 mol CO₂

The ideal gas formula to obtain pressure is:

P = nRT/V

Where: n = 5,96mol; R= 0,082 atm×L/mol×K; T = 273,15 (until STP conditions) and V= 10,0 L

Replacing this values in the equation the pressure is

P = 13,3 atm

I hope it helps!

7 0
3 years ago
Calculate the percentage of oxygen in Al(NO3)3​
Nina [5.8K]

Answer:

4.29%

Explanation:

molecular weight of Al(NO3)3 is

27+(14+16*3)3=213 amu

total mass of oxygen is 3*3=9 amu

percentage is 9/213*100=4.25%

6 0
3 years ago
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