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Mars2501 [29]
3 years ago
5

Alex lives in Arizona. He plants flowers in a pot with new soil mixed with fertilizers, and he places the pot on his back porch.

The flowers receive lots of morning and afternoon sun each day. He waters the plant once that week. When he checks his plant later in the week, he notices that it is starting to turn brown. The plant is also starting to wilt. Which of the following is the reason for these changes in Alex's plant? A. The soil does not have enough nutrients to feed the plant. B. The plant is getting too much sunlight. C. It was too windy for the plant to stand straight. D. The plant has not received enough water.
Chemistry
2 answers:
Alex17521 [72]3 years ago
8 0

I think that your answer is D. I hope this helps you out! 3/13/2019

 Have a great day! :D

-wfz

Anuta_ua [19.1K]3 years ago
5 0
Since he’s watering it and it’s getting sun, i would say it’s because the soil isn’t rich enough and it doesn’t have the nutrients it needs for the plant to grow.
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1.386 g of Mg ribbon combusts to form 2.309 g of oxide product. The mass percent of oxygen in the oxide is 40.0 %.

Let's consider the reaction for the combustion of Mg.

Mg + 1/2 O₂ ⇒ MgO

1.386 g of Mg combusts to form 2.309 g of MgO. We want to determine the mass of oxygen in MgO. According to Lavoisier's law of conservation of mass, matter is not created nor destroyed over the course of a chemical reaction. Then, the mass of Mg in the reactants is equal to the mass of Mg in MgO. The mass of the magnesium oxide is the sum of the masses of magnesium and oxygen. The <u>mass of oxygen in the oxide</u> is:

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We can calculate the mass percent of O in MgO using the following expression.

\% O = \frac{mO}{mMgO} \times 100\% = \frac{0.923 g}{2.309g} \times 100\%  = 40.0 \%

You can learn more about mass percent here: brainly.com/question/14990953

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