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Oxana [17]
3 years ago
10

PLZ ANSWER NOW

Chemistry
2 answers:
abruzzese [7]3 years ago
8 0
The answer is A, hope that helped :)
harina [27]3 years ago
7 0

Answer:

The answer is A.

Explanation:

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Describe what happens in a condensation reactions
dlinn [17]
A condensation reaction is described to be a reaction wherein two molecules form an even larger product and consequently produces a smaller molecule as a by-product. For example, when two amino acids are combined, a dipeptide bond is formed. As a result, 1 molecule of water is produced as a by-product.
5 0
3 years ago
Which of these is an isoelectronic series? 1) na+, k+, rb+, cs+ 2) k+, ca2+, or, s2– 3) na+, mg2+, s2–, cl– 4) li, be, b, c 5) n
ss7ja [257]
An isoelectronic series is where all of the ions listed have the same number of electrons in their atoms. When an atom has net charge of zero or neutral, it has equal number of protons and electrons. Hence, it means that the atomic number = no. of protons = no. of electrons. If these atoms become ions, they gain a net charge of + or -. Positive ions are cations. This means that they readily GIVE UP electrons, whereas negative ions (anions) readily ACCEPT electrons. So, to know which of these are isoelectronic, let's establish first the number of electron in a neutral atom from the periodic table:

Na=11; K=19; Rb=37; Cs = 55; Ca=20; S=16; Mg=12; Li=3; Be=4; B=5; C=6

A. Na⁺: 11-1 = 10 electrons
     K⁺: 19 - 1 = 18 electrons
     Rb⁺: 37-1 = 36 electrons

B. K⁺: 19 - 1 = 18 electrons
    Ca²⁺: 20 - 2 = 18 electrons
    S²⁻:  16 +2 = 18 electrons

C. Na⁺: 11-1 = 10 electrons
    Mg²⁺: 12 - 2 = 10 electrons
     S²⁻:  16 +2 = 18 electrons

D. Li=3 electrons
    Be=4 electrons
    B=5 electrons
    C=6 electrons

The answer is letter B.
7 0
3 years ago
What is the chemical formula of sodium carbonate?
Gekata [30.6K]

Answer:

Na2CO3 is the formula for sodium carbornate

6 0
2 years ago
can someone help and lmk if my answers are correct i don’t think they are please help i’ll give brainliest thank you
Dafna11 [192]

Answer:

5=C, every action has an equal or opposite reaction,

6=B, since it has less air drag and more force exerted on it

7= You're correct

5 0
3 years ago
In Ontario, some electricity comes from coal-burning generators. Coal is a natural form of carbon that has a large amount of sul
irinina [24]

Answer:

a)

C(s)+O_{2}(g) \rightarrow CO_{2}(g)

S(s)+O_{2}(g) \rightarrow SO_{2}(g)

b)

Sulphurdioxide

c)

SO_{2}(g) + H_{2}O(l) \rightarrow H_{2}SO_{3}(l)

SO_{2}(g) + \frac{1}{2}O_{2} \rightarrow SO_{3}(g)

d)  

Incomplete combustion produce harmful gases.

Explanation:

a)

Carbon reacts with atmospheric oxygen to form carbondioxide as well as sulphur dioxide.

The chemical equations are as follows.

C(s)+O_{2}(g) \rightarrow CO_{2}(g)

S(s)+O_{2}(g) \rightarrow SO_{2}(g)

b)

Sulfur dioxide is very harmful to the environment to cause acid rains.

This harmful gas mix with rain water to form  sulphuric acid.

c)

The balanced chemical equation for the reaction that produces harmful environmental effects is as follows.

SO_{2}(g) + H_{2}O(l) \rightarrow H_{2}SO_{3}(l)

SO_{2}(g) + \frac{1}{2}O_{2} \rightarrow SO_{3}(g)

SO_{3}(g) +H_{2}O(l) \rightarrow H_{2}SO_{4}(l)

d)

In the absence of proper amount of oxygen required for combustion, incomplete combustion will take place which will result in formation of more carbondioxide an other harmful gases.

4 0
2 years ago
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