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2 years ago

Explain why some substances travel further than others.

1 answer:

3 0

Larger molecules take longer to move up the chromatography paper or TLC plate, whereas smaller molecules are more mobile. Likewise, the polarity of the molecules can affect how far the spots travel, depending on the type of solvent used.

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Saftey goggles are worn in the lab-

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Answer:

Yes

Explanation:

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3 years ago

Determine the number of protons, neutrons and electrons in each of the following:

Kisachek [45]

Cu+ p=29 e=28 n=34
S2- p=16 e=18 n=16
Pb4+ p=82 e=78 p=125

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5 0

2 years ago

Molar mass of 4Fe(OH)2

lakkis [162]

Answer: The molar mass and molecular weight of 4Fe is 223.38.

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2 years ago

What is the outcome of synapsis, a significant event in meiosis?

joja [24]

side-by-side alignment of homologous chromosomes

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3 years ago

Zn+2HCl=ZnCl2+H2 How many grams of ZnCl2 will be produced from 26.0 g of Zn and 42.0 g of HCl?

irakobra [83]

53.14 grams of Zn $Cl_{2}$ will be produced from 26.0 g of Zn and 42.0 g of HCl.

Explanation:

Balanced chemical reaction:

Zn + 2 HCl ⇒ Zn $Cl_{2}$ + $H_{2}$

data given:

mass of Zn = 26 grams

mass of HCl = 42 grams

mass of Zn $Cl_{2}$ = ?

here in the reaction Zn is the limiting reagent so mass of

Zn $Cl_{2}$ formed will be determined by it.

atomic mass of zinc =65.38 grams/mole

number of moles = $\frac{mass}{atomic mass of 1 mole}$

putting the values in the above equation:

number of moles of zinc = $\frac{26}{65.38}$

number of moles of zinc = 0.39 moles

From the balanced reaction it is seen that

1 mole of Zn produced 1 mole of Zn $Cl_{2}$

0.39 moles will produce x moles of Zn $Cl_{2}$

0.39 moles of Zn $Cl_{2}$ (atomic mass of Zn = 65.38 grams/mole)

mass = atomic mass x number of moles

= 0.39 x 136.28

= 53.14 grams

53.14 grams of Zn $Cl_{2}$ is formed

5 0

3 years ago