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liraira [26]
3 years ago
5

Which step in the scientific method is conducted before a controlled experiment?

Chemistry
1 answer:
ycow [4]3 years ago
4 0
You should always do A. form a hypothesis before performing an experiment also the other options cannot happen until after an experiment.
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What is national flower of nepal?
Vanyuwa [196]

Answer:

national flower : Rhododendron

national animal : cow

national bird : Himalayan Monal

4 0
2 years ago
How many moles of ScCl3 can be produced when 10.00 mol Sc react with 9.00 mol Cl2
Nuetrik [128]

Answer:

Moles of ScCl_3 = 6 moles

Explanation:

The reaction of Sc and Cl_2 to make ScCl_3 is:

2Sc+3Cl_2⇒2ScCl_3

The above reaction shows that 2 moles of Sc  can react with 3 moles of Cl_2 to form ScCl_3.

Mole Ratio= 2:3

For 10 moles of Sc we need:

Moles of Cl_2 = Moles of Sc *\frac{3 moles of Cl_2}{2 Moles of Sc}

Moles of Cl_2 = 10 *\frac{3 moles of Cl_2}{2 Moles of Sc}

Moles of Cl_2 =15 moles

So 15 moles of Cl_2 are required to react with 10 moles of Sc but we have 9 moles of Cl_2 , it means Cl_2 is limiting reactant.

Moles of ScCl_3=Given\  Moles\  of\ Cl_2 *\frac{2\  Moles\ o\ fScCl_3}{3\ Moles\ of\ Cl_2}

Moles\ of\  ScCl_3=9 *\frac{2\  Moles\ of\ ScCl_3}{3\ Moles\ of\ Cl_2}

Moles of ScCl_3= 6 moles

4 0
2 years ago
Read 2 more answers
Which comppund contains both ionic and covalent bonds
Anna11 [10]

Answer:

potassium contains both Ionic and covalent bonds

3 0
2 years ago
Researchers can use solvents to extract, or break apart, components of a cell or tissue to separate and/or isolate components. I
Tems11 [23]

The cell membrane which is more fat permeable will be present at the end of the process.

Solvent extraction is a very important method if separating mixtures. The principle of solvent extraction is based on the idea of like dissolves like. A substance dissolves in the component of the system in which it is most soluble.

If a cell extract is dissolved in a nonpolar solvent, the cell membrane which is mostly permeable to nonpolar molecules will dissolve most in the solvent.

Learn more:brainly.com/question/14396802

6 0
2 years ago
Plzz help guyss I'm so confused
Serga [27]
5 because A=v/t 20/4=5
8 0
2 years ago
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