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Amanda [17]
3 years ago
9

The main source of energy for life on earth is ____? Dirt Nuclear radiation Sun

Chemistry
1 answer:
sdas [7]3 years ago
5 0

Answer:

Sun it is the sun bcz the Sun is the major source of energy for organisms and the ecosystems 

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How many moles of calcium chloride (CaCl2) are needed to react completely with 6.2 moles of silver nitrate (AgNO3)? 2AgNO3 + CaC
nexus9112 [7]

Here we have to choose the right option which tells the moles of CaCl₂ will react with 6.2 moles of AgNO₃ in the reaction

2AgNO₃ + CaCl₂→ 2AgCl + Ca(NO₃)₂

6.2 moles of silver nitrate (AgNO₃) will react with B. 3.1 moles of calcium chloride (CaCl₂).

From the reaction: 2AgNO₃ + CaCl₂→ 2AgCl + Ca(NO₃)₂

Thus 2 moles of AgNO₃ reacts with 1 mole of CaCl₂

Henceforth, 6.2 moles of AgNO₃ reacts with \frac{6.2}{2} = 3.1 moles of CaCl₂.

1 mole of CaCl₂ reacts with 2 moles of AgNO₃. Thus-

A. 2.2 moles of CaCl₂ will react with 2.2×2 = 4.4 moles of AgNO₃.

C. 6.2 moles of CaCl₂ will reacts with 6.2×2 = 12.4 moles of AgNO₃.

D. 12.4 moles of CaCl₂ will reacts with 12.4 × 2 = 24.8 moles of AgNO₃

Thus the right answer is 6.2 moles of AgNO₃ will react with 3.1 moles of CaCl₂.

6 0
3 years ago
A Brønsted-Lowry acid Question 9 options: A) has a lower pH than vinegar. B) is any species that donates a proton. C) is any spe
rusak2 [61]

Answer:

B) is any species that donates a proton.

7 0
3 years ago
Attached are two chemistry questions I need help with. thank you to whoever helps me out
ivann1987 [24]
13.6 
a) yes Pb is more reactive  that Ag, Pb before Ag
b) no, Cu after H
c) yes, Cl2 is more active than I2
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Al ³⁺  more active than Zn²⁺, Mn can react with  Zn²⁺, but not with Al ³⁺ , because Mn after Al but before Zn
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3 years ago
The rules of engagement (roe) working group is often used to _____. (select all that apply.)
Gnesinka [82]

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proactively develop ROE as well as responding to requests for additional ROE measures

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The rules of engagement (roe) working group is a group who's main job is to  proactively develop ROE as well as responding to requests for additional ROE measures. Rules of Engagement are a set or rules or directives for military soldiers that define the circumstances, conditions, degree, and manner in which the use of force can be used.

3 0
3 years ago
Pls help me ASAP thank you!!
Stolb23 [73]
Sorry i cant even read that
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