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RideAnS [48]
3 years ago
15

Select the item with the highest embodied energy for a typical American. A. Organically grown oranges transported 500 miles by t

ruck B. Pineapple imported by air from Costa Rica C. Sweet corn produced locally using synthetic fertilizer D. Green beans grown in the backyard garden
Chemistry
1 answer:
alexdok [17]3 years ago
3 0

Answer:

B: Pineapple imported by air from Costa Rica

Explanation:

Embodied energy is the total energy that is required for the extraction, processing, manufacture and transportation of materials to its intended usage destination.

This means highest embodied energy will be the work that demands the most energy for extraction, processing, manufacture and transportation of materials to its intended usage destination.

Looking at the options given, the one with the highest embodied energy will be "Pineapple imported by air from Costa Rica". This is because other options are done locally and thus will consume lesser energy and processing time unlike the pineapple that is coming from another country and by air.

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Which of the following series of isoelectronic ions (Mg²⁺, N³⁻, F⁻, Si⁴⁺) has the ionic radii in order of largest to smallest? A
Rom4ik [11]

Answer:

Option (d) is correct

N³⁻ > F⁻ > Mg²⁺ > Si⁴⁺

Explanation:

Total electrons for all the species = 10

So these are <u>iso electronic</u> with each other.

We know

Ionic radii ∝ \frac{Magnitude of Negative Charge}{Magnitude of Positive Charge}

  • Si⁴⁺ has 14 protons and 10 electrons
  • Mg²⁺ has 12 protons and 10 electrons
  • N³⁻ has 7 protons and 10 electrons
  • F⁻ has 9 protons and 10 electrons
  • Iso electronic species with greatest number of protons have small size and vice versa.
  • So Si⁺⁴ have smallest size and N³⁻ have largest in size
4 0
3 years ago
List the subshells that hold the 25 electrons in a<br> manganese atom in order of increasing energy
jonny [76]

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d5

Explanation:

According to the Aufbau principle, electrons are filled in orbitals in order of increasing energy. The energy of orbitals in the electronic configuration of manganese increases from left to right, hence 3d orbital is much greater in energy than a 3p orbital.

The arrangement of orbitals in order of increasing energy is shown in the answer above.

4 0
3 years ago
How many molecules of co2,h2o,c3h8, and o2 will be present if the reaction goes to completion?
Nadya [2.5K]

Let initially there are 10 molecules of O2 and 3 molecules of C3H8 present

The reaction will be

C3H8(g)  + 5O2(g)  ----> 3CO2(g)   + 4H2O

so here oxygen molecules are limiting as for 3 molecules of C3H8 we need 15 molecules of O2

now the given 10 molecules of O2 will react with only 2 molecules of C3H8 and they will form six molecules of CO2 and 8 molecules of H2O

Hence answer is

molecules of CO2 formed = 6

Molecules of H2O formed = 8

molecules of C3H8 left = 1

molecules of O2 left = 0


7 0
3 years ago
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What is 30% NaOH test​
pogonyaev

Sodium hydroxide solution 30% CAS 1310-73- 2 Suprapur® - Find MSDS or SDS, a COA, data sheets and more information.

CAS number:

4 0
3 years ago
Which equation has x = 5 as the solution?
Natali5045456 [20]

Answer:

x-10 should be the answer

8 0
3 years ago
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