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Alexxandr [17]
3 years ago
12

A type of wood known as white pine has a density equal to 0.50 g/cm. What is the mass of a block of white pine that has the dime

nsions 5.0 cm by 10.0 cm by 200.0 cm ?
Chemistry
1 answer:
soldi70 [24.7K]3 years ago
5 0
Density equation: mass÷volume
so you multiply your dimensions to find the volume, density is given, so you have to solve equation for mass  so volume×density≈ mass
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Answer:

Answer is explained in the explanation section below.

Explanation:

Solution:

Note: This question is incomplete and lacks very important data to solve this question. But I have found the similar question which shows the profiles about which question discusses. Using the data from that question, I have solved the question.

a) We need to find the major species from A to F.

Major Species at A:

1. Na_{2} CO_{3}

Major Species at B:

1. Na_{2} CO_{3}

2. NaHCO_{3}

Major Species at C:

1. NaHCO_{3}

Major Species at D:

1. NaHCO_{3}

2. H_{2}CO_{3}

Major Species at E:

1. H_{2}CO_{3}

Major Species at F:

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b) pH calculation:

At Halfway point B:

pH = pKa_{1} + log[CO_{3}.^{-2}]/[HCO_{3}.^{-1}]

pH = pKa_{1} = 6.35

Similarly, at halfway point D.  

At point D,

pH = pKa_{2} + log [HCO_{3}.^{-1}]/[H2CO_{3}]

pH = pKa_{2} = 10.33

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State the periodic law, and explain its relation to electron configuration. (Use Na and K in your explanation.)
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Answer:

Explanation:

The period law state that when elements are listed in order of their atomic numbers, the elements fall into recurring groups, so that there is a recurrence of similar properties at regular intervals.

Na and K in the periodic table fall into the same group, this is because they both have one electrons in their outermost shell.

Na 11 -1s2 2s2 2p6 3s1

K 19 - 1s2 2s2 2p6 3s2 3p6 4s1

They share similar chemical and physical properties. Na and K are very reactive metals, they can loose/donate their outermost electron to non metals in other to attain stable octet state.

The form ionic compound when they react with non metals.

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Answer:

yes, if they were in rest they would have potential energy

Explanation:

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I am sorry i wish i could help you but i dont know the answer either.
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