3 years ago

Between energy and life which one comes first answer with scientific reason

1 answer:

6 0

Explanation:

While the sun is an excellent source of energy, not all forms of life can utilize the sun's energy directly. This lesson describes how plants transform the sun's energy into potential energy stored in sugar, how living organisms utilize energy in sugar to perform work, and how the relationship between photosynthesis and cellular respiration is necessary for life.

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If an aqueous solution has a ph of 5.57 what is the concentration of hydroxide ion ([oh-]) in the solution?

irga5000 [103]

PH=5.57
pH+pOH=14
5.57 + pOH=14
pOH = 14-5.57= 8.43

pOH = - log [OH⁻]
-pOH= log [OH⁻]

$[OH^{-}] = 10^{-pOH}= 10^{-8.43}= 3.72*10^{-9}

 [OH^{-}]= 3.72*10^{-9}$

8 0

3 years ago

QUESTION 21 The combustion of ammonia in the presence of excess oxygen yields NO 2 and H 2O: 4 NH 3 (g) 7 O 2 (g) 4 NO 2 (g) 6 H

Harrizon [31]

Answer:

The answer to your question is 47.44 g of Oxygen

Explanation:

Data

mass of Ammonia = 14.4 g

mass of Oxygen = ?

Balanced chemical reaction

4NH₃ + 7O₂ ⇒ 4NO₂ + 6H₂O

Process

1.- Calculate the molar mass of Ammonia

NH₃ = 4[(1 x 14) + (3 x 1)] = 4[14 + 3] = 4[17] = 68 g

2.- Calculate the molar mass of Oxygen

O₂ = 7[16 x 2] = 7[32] = 224 g

3.- Use proportions to calculate the mass of Oxygen

68g of NH₃ --------------------- 224 g of O₂

14.4 g of NH₃ ----------------- x

x = (14.4 x 224) / 68

x = 3225.6/ 68

x = 47.44 g

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3 years ago

In order to become stable in an ionic bond, oxygen needs to (A) gain 2 electrons (C) share 2 electrons B) lose 2 electrons

Sedbober [7]

Answer:

gains 2 electrons. In order for the new ionic compound to form a a neutral compound, the oxygens must gain 6 electrons

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3 years ago

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This is how osmium appears in the periodic table.A purple box has O s at the center and 76 above. Below it says osmium and below

klemol [59]

Answer:

114

Explanation:

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3 years ago

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Help ! how do I do this

DedPeter [7]

I think it is going to be 3

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3 years ago

Between energy and life which one comes first answer with scientific reason​

Between energy and life which one comes first answer with scientific reason