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shusha [124]
3 years ago
6

Which element, Phosphorus or Calcium, is more reactive? Why?

Chemistry
1 answer:
Elza [17]3 years ago
5 0

Answer:

phosphorus is more reactive than calcium

Explanation:

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Consider the first-order reaction shown here. the yellow spheres in the pictures to the right represent the reactant,
Luda [366]
The rate constant of the reaction K we can get it from this formula:

K=㏑2/ t1/2 and when we have this given (missing in question):
that we have one jar is labeled t = 0 S and has 16 yellow spheres inside and the jar beside it labeled t= 10 and has 8 yellow spheres and 8 blue spheres and the yellow spheres represent the reactants A and the blue represent the products B

So when after 10 s  and we were having 16 yellow spheres as reactants and becomes 8 yellow and 8 blue spheres as products so it decays to the half amount so we can consider T1/2 = 10 s
a) by substitution in K formula:
∴ K = ㏑2 / 10 = 0.069 
The amount of A (the reactants) after N half lives = Ao / 2^n
b) so no.of yellow spheres after 20 s (2 half-lives) =  16/2^2 = 4
and the blue spheres = Ao - no.of yellow spheres left = 16 - 4 = 12
c) The no.of yellow spheres after 30 s (3 half-lives) = 16/2^3 = 2
and the blue spheres = 16 - 2 = 14

8 0
3 years ago
Which is one of the following is a nonmetal
3241004551 [841]
Br is a non-metal. The other answers like Os, Ir, W are not combinations while Sr is a metal. So Br is your answer.
7 0
3 years ago
Which of the following correctly applies to a reaction mechanism?1. The elementary steps must sum to the overall reaction.2. The
SVETLANKA909090 [29]

Answer:

A, B and D

Explanation:

The rate determining step decides the overall rate of reaction and the species involved in the rate determining step determine the overall order of reaction. All the elementary steps in the mechanism sum up to give the overall reaction equation. However, transient intermediates only appear in elementary reaction equations and not the overall reaction equation.

4 0
3 years ago
Which solution would most likely cause a plant placed in it to become firmer and more rigid? A. hypertonic B. hypotonic C. isoto
Anna11 [10]
"Hypotonic" is the one solution among the choices given in the question that would <span>most likely cause a plant placed in it to become firmer and more rigid. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer has come to your great help.</span>
5 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%
Elan Coil [88]

Let's check Electronic configuration of N in ground state

\\ \sf\longmapsto 1s^22s^22p^3

  • In exited state

\\ \sf\longmapsto 1s^22s^22px^12py^12pz^2

  • 3 p orbitals

In hydrogen case

\\ \sf\longmapsto 1s^1

  • 1 s orbital

Hence Hybridization

\\ \sf\longmapsto s-p-p-p

\\ \sf\longmapsto sp^3

Structure is tetrahedral .

Spare way:-

  • Bond pairs==3=>Bonding electrons=6
  • Lone pair=1=>Anti bonding electrons=2

Hybridization

\\ \sf\longmapsto \dfrac{1}{2}[\sigma+\sigma *]

\\ \sf\longmapsto \dfrac{1}{2}[6+2]

\\ \sf\longmapsto \dfrac{1}{2}[8]

\\ \sf\longmapsto 4

  • sp3 Hybridization
  • Shape-Tetrahedral .

6 0
2 years ago
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