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Mice21 [21]
2 years ago
15

Which element in the list is the most reactive? C Ba S Cs

Chemistry
1 answer:
Tems11 [23]2 years ago
4 0

Answer:

Cs

Explanation:

This element is the farthest right, and lowest meaning that the reactivity of it is very high.

1. valence electrons and electronegativity

2. Both reactivity and electronegativity decrease down a group.

3. Electronegativity decreases down a group, and reactivity increases down a group.

4. The number of valence electrons increases from left to right.

5. Cs

{quizlet: captncrun}

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10. At 573K, NO2(g) decomposes forming NO and O2. The decomposition reaction is second order in NO2 with a rate constant of 1.1
leva [86]

Answer:

48.67 seconds

Explanation:

From;

1/[A] = kt + 1/[A]o

[A] = concentration at time t

t= time taken

k= rate constant

[A]o = initial concentration

Since [A] =[A]o - 0.75[A]o

[A] = 0.056 M - 0.042 M

[A] = 0.014 M

1/0.014 = (1.1t) + 1/0.056

71.4 - 17.86 = 1.1t

53.54 = 1.1t

t= 53.54/1.1

t= 48.67 seconds

Hence,it takes 48.67 seconds to decompose.

6 0
3 years ago
The answer please thank you
otez555 [7]

Answer:

B

Explanation:

5 0
3 years ago
Wht is this called<br>N which chain does it belong​
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Answer:

national

Explanation:

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5 0
3 years ago
Which desribes a step in the process of forming and ionic bond
Brums [2.3K]

Explanation:

A metal atom loses electrons and becomes a positive ion.

3 0
3 years ago
The density of aluminium is 2830 Kg/M^3. what is the density of aluminum in g/cm^3?​
postnew [5]
<h3>Answer:</h3>

2.83 g/cm³

<h3>Explanation:</h3>
  • Density of a substance is the ratio of mass of the substance to its volume.

Therefore;

  • Density is given by dividing mass of a substance by its volume.
  • It is measure in g/cubic centimeters or kg per cubic meters.

In this case;

Density of Al = 2830 Kg/m³

We are required to convert is to g/cm³

We use the relationship;

1 g/cm³ = 1000 kg/m³

Therefore;

= 2830 kg/m³ ÷ 1000 kg/m³

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Hence, 2830 kg/m³ of Aluminium is equivalent to 2.83 g/cm³

4 0
3 years ago
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