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-BARSIC- [3]
3 years ago
13

Name the element which lies in group IA and 3rd period. What is the valency of it and why?​

Chemistry
2 answers:
Jlenok [28]3 years ago
4 0

Answer:

Bro I got notification of this question but soory I don't know the answer Hope you understand me

laila [671]3 years ago
3 0

Answer :

Na valency 1

Explanation:

Na -sodium.

This element is in the 1A group, so it has 1 electron on the last (valent) level.

So, only 1 electron can participate in forming chemical bond, and therefore the valency of Na is 1.

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What is the mass in grams of 5.25 x 1024 molecules of NaOH?
Colt1911 [192]

Answer: The mass is 348.8g

Explanation:

We begin by using Avogadro's number to convert the number of molecules of  Sodium Hydroxide to moles.

6.02 x 10∧23 molecules of NaOH -------> 1 mole of NaOH

∴ 5.25 x 10∧24 molecules of NaOH -------> 1/ 6.02 x 10∧23 x 5.25 x 10∧24 =

                                                                    8.72moles.

Having found the number of moles, we then move from moles to gram by using the molar mass of NaOH (i.e the mass of 1 mole of NaOH).

1 mole of NaOH is equivalent to 40g (Molar Mass)

8.72 moles of NaOH would be equivalent to; 40/ 1  x 8.72 = 348.8g

The mass in 5.25 x 10∧24molecules of NaOH is 348.8g

4 0
3 years ago
Cesium sulfite is formed from the cs cation and the so2−3 anion. What is the correct formula for this compound?
Anna35 [415]

Cesium Sulfite is formed from the Cs cation and the SO₃⁻² anion. The correct formula for this compound is Cs₂SO₃.

<h3>What is Cation ? </h3>

Cations are positively charged ions. It forms when an element lose one or more electrons.

<h3>
What is Anion ? </h3>

Anions are negatively charged ions. It form when an element gains one or more electrons.

Symbol         Cs⁺¹         SO₃⁻²

Valency           +1              -2

Formula of the compound is Cs₂SO₃.

Thus from the above conclusion we can say that Cesium Sulfite is formed from the Cs cation and the SO₃⁻² anion. The correct formula for this compound is Cs₂SO₃.

Learn more about the Cation and Anions here: brainly.com/question/20005547
#SPJ1

3 0
2 years ago
Kim Chemist proposes that increasing the proportion of butadiene in her glue formulation will make the glue stickier. Her propos
Sunny_sXe [5.5K]

Answer: option D) hypothesis

Explanation:

Kim proposal is an hypothesis, because it is an assumption that will ONLY be accepted as true (i.e becomes a theory) when butadiene successfully makes the glue stickier in several conducted experiments.

But, at the moment Kim proposal is an hypothesis.

7 0
4 years ago
Which of the following is NOT true about comparisons between analog and digital signals?
dolphi86 [110]

Answer:

Analog signals are used to convert sound waves into electronic signals.

Explanation:

i think i hope i helped :))

how is your day going?

8 0
3 years ago
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HELP ASAP PLS. The melting of a glacier is an example of the interactions among which of Earth’s spheres?
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Answer:

d. hydrospher, asthenosphere, atmosphere

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