The Earth can gain or lose matter. True False

Answers

Answer 1

Answer:

Answer:

True

Explanation:

According to some calculations, the Earth is losing 50,000 metric tons of mass every single year, even though an extra 40,000 metric tons of space dust converge onto the Earth's gravity well, it's still losing weight.

Answer 2

Answer:

Answer:

true

Explanation:

Related Questions

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1. Write the structural formulas and give IUPAC names for all isorneric alcohols of molecular formulaС4Н9OH

Answers

Explanation:

Butanol (С4Н9OH)

Structural formula is :-

CH3-CH2-CH2-CH2-OH

PLEASE HELP ASAP!!1. what is the pOH of a solution if the pH is 2.23?

A. pOH=13
B. pOH=11.77
C. pOH=8.52
D. pOH=10.52

2. what is the pOH of a solution if the pH is 2.23

A. pOH=1
B. pOH=12
C. pOH=8
D. pOH=9

3. Given a solution of perchloric acid has a concentration of .023M, what is the pH and pOH

A. pH=2.3 and pOH=11.97
B. pH=1.64 and pOH= 12.36
C. pH=4.5 and pOH=9.95

Answers

1) POH=14-2.23=11.77
2)B
3)HClO4=H+ +clo4—
C(H+)=0.023 M
pH=-log[H+]=1.63
POH=14-1.63=12.37

Final answer:

The pH and pOH for a solution are related through the equation pH + pOH = 14. The pOH for solutions with a pH of 2.23 is 11.77, and in a solution of perchloric acid with a concentration of .023M, the pH is 1.64 and pOH is 12.36.

Explanation:

The concept of pOH and pH are related through the equation pH + pOH = 14 at 25 °C. If you have the value of one, you can easily find the other. For your first two questions, the pH of solution is given as 2.23. Therefore, the pOH would be 14 - 2.23 = 11.77. Your answer to both questions 1 and 2 is B. pOH=11.77.

For question 3, the perchloric acid has a concentration of .023M. To find the pH, we calculate -log[H3O+], which gives about 1.64. Therefore, the pOH would be 14 - 1.64 = 12.36. Your answer to question 3 is B. pH=1.64 and pOH=12.36.

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. Explain why, in the sample calculations, 0.1 g of the unknown produced a GREATER freezing point depression than~e same mass of naphthalene.

Answers

Answer

Naphthalene is a non electrolyte

If the unknown compound is an electrolyte it gives 2 or more ions in solution

( NaCl >> Na+ + Cl- => 2 ions

Ca(NO3)2 >> Ca2+ + 2 NO3- => 3 ions)

the f.p. lowering is directly proportional to the molal concentration of dissolved ions in the solution )

For naphthalene

delta T = 1.86 x m

for a salt that gives 2 ions

delta T = 1.86 x m x 2

hence the lowering in freezion point of unkown is greater then napthalene

Three resonance structures of the given anion are possible. One is given, but it is incomplete. Complete the given structure by adding nonbonding electrons and formal charges. Draw the two remaining resonance structures (in any order), including nonbonding electrons and formal charges. Omit curved arrows.

Answers

Answer:

Explanation:

The missing incomplete resonance structure is attached in the image below. From there, we can see the addition of the nonbonding electrons and its' formal charge which makes the resonance structure a complete resonance structure. The others two resonance structure that can be derived from the complete structure is also shown in the image. Out of these three structures, the structure that contributes most to the hybrid is the structure with the negative charge on the oxygen.

Final answer:

To complete the provided resonance structure, add nonbonding electrons and formal charges. Then, draw the two remaining resonance structures by distributing the nonbonding electrons and formal charges differently.

Explanation:

When completing the provided incomplete structure of the anion, you need to add nonbonding electrons and formal charges to make it accurate. Then, draw the two remaining resonance structures by distributing the nonbonding electrons and formal charges differently. To illustrate, let's consider the example of a nitrate ion (NO3-). The complete structure of the provided resonance form would have a double bond between the central nitrogen atom and one of the oxygen atoms, with two lone pairs on the nitrogen atom. The remaining two resonance structures would have different double bond oxygen-nitrogen combinations.

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The change in velocity over a specific amount of time Includes speeding up. slowing down or changing direction. This is known as O speed acceleration changing speed