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gizmo_the_mogwai [7]
2 years ago
13

Write the chemichal name of each of the chemichal formula. 1)Pbo2,2)PbO

Chemistry
1 answer:
marishachu [46]2 years ago
4 0

Answer:

Explanation:

1. Lead (IV) Oxide

2. Lead (II) Oxide

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For hydrocyanic acid, HCN, Ka = 4.9 × 10-10. Calculate the pH of 0.20 M NaCN. What is the concentration of HCN in the solution?
gogolik [260]
By using the ICE table :

initial    0.2 M            0           0
change -X                 + X           +X
Equ     (0.2 -X)            X               X

when Ka = (X) (X) / (0.2-X)
so by substitution:

4.9x10^-10 = X^2 / (0.2-X) by solving this equation for X 
∴X ≈ 10^-6
∴[HCN] = 10^-6

and PH = -㏒[H+]
             = -㏒ 10^-6
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3 0
3 years ago
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How many protons are in an isotope of sodium with a mass number of 25?
Hunter-Best [27]
How many protons are in an isotope of sodium with a mass number of 25? 11
8 0
3 years ago
What is the pH of a solution that has a hydronium ion concentration 100 times less than a solution with a pH of 6 explain your r
aksik [14]

Answer:

4

Explanation:

cuz i just took a test and the question was this just reversed. if the ph is 4 and the other ph is 100x greater it’s 6. i don’t kno the reasoning lol

4 0
3 years ago
A formal operational thinker and a concrete operational thinker are both presented with three beakers containing red liquid and
Jlenok [28]

Answer:

The formal thinker would take a systematic approach in the combination of the liquids, thereby eliminating several unnecessary combinations that the concrete thinker would definitely combine.

Explanation:

The formal operational stage in thinking begins when a child gets to the age of 12 and continues to adulthood. The formal operational stage provides an individual with the ability to think abstractly by manipulating ideas in their head without concretely manipulating it. A concrete would have to see something to be able to manipulate any ideas.

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= 15 cubic centimeter × 10 gram/cubic centimeter

= 150 gram

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3 years ago
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