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Annette [7]
3 years ago
6

In your own words, explain John Martin s theory about iron dumping.

Chemistry
1 answer:
AlekseyPX3 years ago
3 0
Basically the theory centers on the idea that an atom of iron dumped into the sea results in the conversion of 10,000 molecules of carbon dioxide to carbohydrates. John Martin's hypothesis is that the growth of phytoplankton is limited by the amount of iron dissolved in sea water. Lab experiments done by him then showed that indeed, adding a small amount of iron accelerated the growth of plankton.
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The third ionization energy of bromine is the energy required for which of the following processes?
Rzqust [24]

Answer:

<u><em /></u>

  • <u><em>Br²⁺ (g)  → Br³⁺ (g) + e⁻</em></u>

Explanation:

1) The <u>first ionization energy</u> is the energy required to release an electron from a gas neutral atom.

Hence, this is the energy required for this process:

  • Br (g)  → B⁺ (g) + e⁻

2) The <u>second ionization energy </u>is the energy required to release an electron from a gas ion with charge 1+.

Hence, this is the energy required for this process:

  • Br⁺ (g)  → B²⁺ (g) + e⁻

3) The<em><u> third ionization energy</u></em> is the energy required to release an electron from a gas ion with charge +2.

Hence, this is the energy required for this process:

<u />

  • <u><em>Br²⁺ (g)  → B³⁺ (g) + e⁻</em></u>
3 0
3 years ago
Why were the sample of salt and sand placed into 50-ml beakers prior to weighing?
LUCKY_DIMON [66]

Answer : Salt and Sand are weighed and kept in different 50 Milliliter beakers because, the experiment is about studying and separating the homogeneous mixture. As salt crystals are cubic and sand grains are rounded oblong grains. If we mix it together it would require a physical method to separate them. So, before starting the experiment it needs to be weighed in different beakers.

7 0
3 years ago
a sample of gas with a mass of 1.70 g occupies a volume of 961 ml at a pressure of 728 torr and a temperature of 21°C. what is t
LuckyWell [14K]

<span>n = PV / RT = 733 torr *0.961 L / 62.363 L torr K^-1 mol^-1 * 294 K = 0.038419617 mol </span>
4 0
4 years ago
Calculate the density of a sample of gold if the sample has a volume of 48.9cm3 and a mass of 944.75 g
LekaFEV [45]

Answer:

19.3g/cm^3

Explanation:

Hey,

the formula for density is Mass/Volume so in this question you basically put the given things in the formula

D = M/V

D= 944.75/48.9

D= 19.3g/cm^3

7 0
3 years ago
Read 2 more answers
The surface of Mars, the atmosphere of Jupiter, water spewing from the rings of Saturn, photographs of many of the other eight p
ra1l [238]

Answer:

A. Space Probes

A space probe is a robotic spacecraft that does not orbit Earth, but instead, explores further into outer space. A space probe may approach the Moon; travel through interplanetary space; flyby, orbit, or land on other planetary bodies; or enter interstellar space

Click on the picture to see my test to know this is legit!

Hope this helps!

8 0
3 years ago
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