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yarga [219]
4 years ago
8

The carbon cycle involves an exchange of carbon between the atmosphere and geosphere only. Please select the best answer from th

e choices provided T F
Chemistry
2 answers:
Eva8 [605]4 years ago
8 0
The correct answer for the question that is being presented above is this one: "FALSE." The carbon cycle involves an exchange of carbon between the atmosphere and geosphere only. This statement is false -- as well as the geosphere, the carbon cycle also moves carbon between the atmosphere, the biosphere, and the hydrosphere.

shutvik [7]4 years ago
7 0

Edgeunity says F A L S E

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Balance the following chemical equation
ratelena [41]

Answer:

Explanation:

4). Ca(NO₃)₂ + Na₂SO₄ → CaSO₄ + 2Na(NO₃)₂

  This question is incorrect.

  Since, the final product by reacting Na⁺⁺ and NO₃⁻⁻ is NaNO₃

  Correct equation will be,

  Ca(NO₃)₂ + Na₂SO₄ → CaSO₄ + 2NaNO₃

  This equation is in the balanced form.

5). Ni(NO₃)₂ + KI → NiI + 2K(NO₃)₂

  Correct equation will be,

  Ni(NO₃)₂ + KI → NiI₂ + 2KNO₃

  [Since final product by reacting Ni⁺⁺ and I⁻ is NiI₂]

  Balanced form of this equation will be,

  Ni(NO₃)₂ + 2KI → NiI₂ + 2KNO₃

6). Ni(NO₃)₂ + KOH → NiOH + K(NO₃)₂

   Correct form of the equation will be

   Ni(NO₃)₂ + KOH → Ni(OH)₂ + KNO₃

   [Since reaction of Ni⁺⁺ and OH⁻ gives Ni(OH)₂ and the reaction of K⁺ and NO₃⁻ gives KNO₃]

   Now balancing this equation,

   Ni(NO₃)₂ + KOH → Ni(OH)₂ + 2KNO₃

                              ↓

  Ni(NO₃)₂ + 2KOH → Ni(OH)₂ + 2KNO₃

8 0
4 years ago
What is the mass of 2.0 moles of sodium
prisoha [69]

Answer:

The molar mass of Na (sodium) is 23.0 g/moles

Explanation:

3 0
4 years ago
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Please help! Can someone give me answers for 2.08 Graded Assignment: Boiling and Melting Points Exploration for 8th grade scienc
Alborosie

Answer:

1. Looking at the line plots on your graph, describe how boiling point and melting point vary with respect to atomic number.

      As the atomic number increases, the boiling point increases due to there being more electrons, which creates a larger strength of negative charge around the nucleus of the atom.  

2. Now look at the segment of the graph between the two data points marked with black squares. Describe how the boiling point and melting point plots behave between these points. Be as specific as possible.

The graph shows relation between the melting point and the boiling point

3. On your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. Locate these elements on your periodic table. What term or description would you use to identify these elements with respect to the periodic table?

All of these elements can be found in the second period of the periodic table.

6. After reviewing your answers to questions 2 and 4 above, would you define boiling point and melting point as a periodic table family trend (vertical groups), period trend (horizontal rows), or neither? Explain your answer.

     Neither, boiling and melting point per element varies from element to element on the periodic table. Family trends and period trends determine what kind of element each aspect is.  

7. Using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. Explain your answers.

Gas would be room temperature because it fills up its container and helps the temperature of the room.

Explanation:

4 0
3 years ago
Ms. Block's students are studying chemical reactions. A classic reaction occurs when a metal is added to hydrochloric acid. Migu
g100num [7]

Answer:

the boys should cover the end of the test tube to a ballon

Explanation:

5 0
3 years ago
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Why do atoms gain or lose electrons?
Aleksandr [31]

Answer:kapil

Explanation:

Atoms lose electrons, if an electron gets more energy than then binding energy of the electron. This may be because of a collision with a charged particle or because of absorbtion of a photon. In a metal, there are just other positive charges nearby. The electron is not lost, but shared.

6 0
4 years ago
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