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kodGreya [7K]
3 years ago
14

Which of these choices do both sustainable and organic agriculture avoid?

Chemistry
1 answer:
k0ka [10]3 years ago
7 0

Answer:

B. Artificial hormones

Explanation:

pls mark as brainliest

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Please help! Name the following compound. Thank you!!!
umka2103 [35]
I think it's Methane
8 0
3 years ago
After recrystallizing an impure sample with isopropanol, you isolate your product by filtration. What solvent do you use to wash
ollegr [7]

Answer:

The correct answer is ice cold isopropanol.

Explanation:

Any compound in the initial stage is first dissolved in any suitable solvent and is heated for a certain duration for the process of recrystallization. Afterward, the compound is kept at room temperature so that it gets cooled gradually. In the process, the impurities remain dissolved in the solvent and the pure compound gets separated in the form of a precipitate.  

Post all this, the filtration of the pure compound is done and is then washed with the cold solvent, which was initially used to dissolve the compound. Therefore, the appropriate solvent to use in the process is ice-cold isopropanol.  

4 0
3 years ago
If you had this equation: x(0.5)(320) = (1.2)(48)(325)
Anna71 [15]

x(0.5)(320)=(1.2)(48)(325)

160x=18720

x=18720/160

x=117

3 significant figures

5 0
3 years ago
Which of the following statements is true about chemical reactions?
djverab [1.8K]
Endothermic reactions absorb heat and exothermic reactions give off heat
6 0
3 years ago
WHAT MASS OF WATER WILL BE PRODUCED FROM 2.70 MOLES OF CA(OH)2 REACTING WITH HCI
Keith_Richards [23]

<u>Answer:</u> The mass of water produced in the reaction is 97.2 grams

<u>Explanation:</u>

We are given:

Moles of calcium hydroxide = 2.70 moles

The chemical equation for the reaction of calcium hydroxide and HCl follows:

Ca(OH)_2+HCl\rightarrow CaCl_2+2H_2O

By Stoichiometry of the reaction:

1 mole of calcium hydroxide produces 2 moles of water

So, 2.70 moles of calcium hydroxide will produce = \frac{2}{1}\times 2.70=5.40mol of HCl

To calculate mass for given number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Molar mass of water = 18 g/mol

Moles of water = 5.40 moles

Putting values in above equation, we get:

5.40mol=\frac{\text{Mass of water}}{18g/mol}\\\\\text{Mass of water}=(5.40mol\times 18g/mol)=97.2g

Hence, the mass of water produced in the reaction is 97.2 grams

3 0
4 years ago
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