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Murrr4er [49]
3 years ago
9

Meredith notices that different plant fertilizers are made up of different chemicals. Some fertilizers are high in nitrogen. Oth

er fertilizers are high in phosphorus. Meredith hypothesizes that nitrogen-rich fertilizers are best to grow fruit crops such as strawberries. When she is designing her experiment, what should be her variable?
Chemistry
1 answer:
enot [183]3 years ago
5 0

Fertilizer

Explanation:

A variable in an experiment is that factor that changes and it causes differences in the phenomenon one desires to observe.

Meredith desires to study the effects of different types of fertilizers on fruit crops.

  • In order to achieve a good result, the component of the fertilizers should vary.
  • She must tryout different proportion of nitrogen and phosphorus in the fertilizer on the fruit crop.
  • The variable in the experiment is therefore the fertilizer. It is the factor that is changing.

Learn more:

Experimental design brainly.com/question/5249450

#learnwithBrainly

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Disadvantages of Mendeleev's periodic table​
mestny [16]

Answer:

Various limitations of Mendeleev's periodic table are:-

Position of hydrogen - he couldn't assign a correct position to hydrogen as it showed properties of both alkali and halogens .

Position of isotopes - he considered that the properties of elements are a function of their atomic masses. Hence isotopes of a same element couldn't be placed.

In the d-block , elements with lower atomic number were placed before higher atomic number.

Explanation:

3 0
2 years ago
Un estudiante debe preparar una disolución 2M de NaCl (58,44 g/mol) en un recipiente de 7L. ?Cuántos gramos de NaCl debe agregar
Gnesinka [82]

Answer:

818.2 g.

Explanation:

  • Molarity is the no. of moles of solute per 1.0 L of the solution.

<em>M = (no. of moles of NaCl)/(Volume of the solution (L))</em>

<em></em>

M = 2.0 M.

no. of moles of NaCl = ??? mol,

Volume of the solution = 7.0 L.

∴ (2.0 M) = (no. of moles of NaCl)/(7.0 L)

∴ (no. of moles of NaCl) = (2.0 M)*(7.0 L) = 14.0 mol.

  • To find the mass of NaCl, we can use the relation:

<em>no. of moles of NaCl = mass/molar mass</em>

<em></em>

<em>∴ mass of NaCl = (no. of moles of NaCl)*(molar mass) =</em> (14.0 mol)*(58.44 g/mol) = <em>818.2 g.</em>

3 0
2 years ago
Explain what has to happen to join two monosaccharide units into a disaccharide.
yawa3891 [41]
Dehyrdration should happen to join two monosaccharide units into a dissacharide. It is used to build up molecules by losing some water moleculse in the process. In a dehydration synthesis reaction between two un-ionized monomers. Hope this answers the question. Have a nice day.
6 0
3 years ago
CAN HF USED TO CLEAVE ETHERS EXPLAIN
PilotLPTM [1.2K]

Answer:

no

Explanation:

Fluoride is not nucleophilic (having the tendency to donate electrons) enough to allow for the use of HF to cleave ethers in protic media(protic solvents are polar liquid compounds that have dissociable hydrogen atoms). The rate of reaction is comparably low, so that heating of the reaction mixture is required.

4 0
3 years ago
What is deoxyribonucleic acid, the name for DNA?
jek_recluse [69]
None of the above, deoxyribonucleic acid is the full name of the abbreviation DNA
3 0
3 years ago
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