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MrMuchimi
3 years ago
13

What do scientists predict about freshwater resources in the not-too-distant future ?

Chemistry
1 answer:
Galina-37 [17]3 years ago
5 0

Answer:

There will be a critical shortage. -In garden, water plants early in the morning or in the evening.

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Which substance can lead to addiction, or drug dependence, if abused?
worty [1.4K]

Answer:

D

Explanation:

All of those can produce happy chemicals which cause your brain to become dependent. The side effects can be life-threatening but if it makes your brain irrationally happy then it doesn't matter

7 0
3 years ago
How much aluminum oxide and how much carbon are needed to prepare 573 g of aluminum by the balanced chemical reaction (below) if
yawa3891 [41]

Answer:

1387.2g of Al2O3

Explanation:

The number of moles of aluminum oxide required to give the actual yield is obtained from the given mass of aluminum produced by the reaction. The percentage yield is used to obtain the theoretical yield of the aluminum. The number of moles produced theoretically can be used to calculate the amount of aluminum oxide required in moles and when we multiply the value obtained by the molar mass of aluminum oxide, we obtain the mass of aluminum oxide required.

4 0
3 years ago
Read 2 more answers
Calculate the compound amount. Use the compound amount formula and a calculator. (Round your answer to two decimal places.) P =
Julli [10]

Answer:

The compound amount is $303.03 .

Explanation:

Formula for compound interest:

A=P\times (1+\frac{R}{n})^{tn})

Principle amount  = $1100

Rate of the interest compounded semiannually :

= R = 9% = 0.09

Number of times interest compounded, n = \frac{12}{6}=2

(semi means two times in a year)

Time period = T = 14

A=\$1100\times (1+\frac{0.09}{2})^{2\times 14}=\$303.0310\approx \$303.03

The compound amount is $303.03 .

5 0
3 years ago
True or False: The statement below is an observation.
nevsk [136]
The answer is true because if you look at the question what does it say
7 0
3 years ago
Read 2 more answers
What is the concentration of h+ ions in a 2.20 m solution of hno3?
kvv77 [185]

The question is improperly formatted.

What is the concentration of H+ ions in a 2.2 M solution of HNO3.

Answer:-

2.2 moles of H+ per litre

Explanation:-

M stands for molarity. 2.2 M means 2.2 moles of HNO3 is present per litre of the solution.

Now HNO3 has just 1 H in it's formula. HNO3 would give H+. So 2.2 moles of HNO3 would mean 2.2 moles of H+ per litre.

7 0
3 years ago
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