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3 years ago

How does knowing the meaning of prefix-trans help you remember what happens to light that strikes a translucent object ?

Chemistry

1 answer:

katovenus [111]3 years ago

6 0

Explanation:

The prefix trans- and its variant tra- mean "across".

A translucent substance allows some light to go "across" it to the other side. Also, think about a transparent substance: it allows light to go "across" it; or a translation, it is a going "across" from one language into another.

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Wenzhou prepares 200 mL of a solution of SnCl4in which the concentration ofchloride ions is 0.240M.a) What is the molarity of th

nalin [4]

Answer: a) 0.06 M

b) 3.13 grams.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{moles}{\text {Volume in L}}$

Moles of $Cl^-=Molarity\times {\text {Volume in L}}=0.240\times 0.2L=0.048moles$

The balanced reaction for dissociation will be:

$SnCl_4\rightarrow Sn^{4+}+4Cl^{-}$

Thus for 4 moles of $Cl^-$ , there is 1 mole of $SnCl_4$

Thus moles of $SnCl_4=\frac{1}{4}\times 0.048=0.012$

Molarity of $SnCl_4=\frac{moles}{\text {Volume in L}}=\frac{0.012}{0.2L}=0.06M$

Thus the molarity of the $SnCl_4$ solution = 0.06 M

b) Mass of $SnCl_4$ = $moles\times {\text {Molar mass}}=0.012mol\times 260.522g/mol=3.13g$

Thus mass of $SnCl_4$ Wenzhou use is 3.13 grams.

7 0

3 years ago

Read 2 more answers

For each of the following pairs of substances, determine which has the larger molar entropy at 298 K: (A) Br₂(l) or (B) Cl₂(g) (

irakobra [83]

Explanation:

Entropy is defined as the degree of randomness present in a substance. Therefore, more is the irregularity present in a compound more will be its molar entropy.

Hence, decreasing order to molar entropy in state of matter is as follows.

Gases > Liquids > Solids

In the first pair, we are given $Br_{2}(l)$ or $Cl_{2}(g)$ . Since, molar entropy of liquids is less than the molar entropy of gases.

Hence, $Cl_{2}(g)$ will have larger molar entropy as compared to $Br_{2}(l)$ .

In the second pair, we are given Fe(s) or Ni(s). More is the molar mass of a compound more will its molar entropy. Molar mass of Fe is 55.84 g/mol and molar mass of Ni is 58.69 g/mol.

Hence, molar entropy of Ni(s) is more than the molar entropy of Fe(s).

In the third pair, we are given $C_{2}H_{6}(g)$ or $C_{2}H_{4}(g)$ . As both the given species are gaseous in nature. So, more is the molar mass of specie more will be its molar entropy.

Molar mass of $C_{2}H_{6}(g)$ is 30.07 g/mol and molar mass of $C_{2}H_{4}(g)$ is 28.05 g/mol. Therefore, molar entropy of $C_{2}H_{6}(g)$ is more than the molar entropy of $C_{2}H_{4}(g)$ .

In the fourth pair, we are given $CCl_{4}(g)$ or $CH_{4}(g)$ . Molar mass of $CCl_{4}(g)$ is 153.82 g/mol and molar mass of $CH_{4}(g)$ is 16.04 g/mol.

Therefore, molar entropy of $CCl_{4}(g)$ is more than the molar entropy of $CH_{4}(g)$ .

In the fifth pair, we are given HgO(s) or MgO(s). Molar mass of HgO is 216.59 g/mol and molar mass of MgO is 40.30 g/mol.

Hence, molar entropy of HgO(s) is more than the molar entropy of MgO.

In the fifth pair, we are given NaCl(aq) or $MgCl_{2}(aq)$ . Molar mass of NaCl 58.44 g/mol and molar mass of $MgCl_{2}(aq)$ is 95.21 g/mol.

Hence, the molar entropy of $MgCl_{2}(aq)$ is more than the molar entropy of NaCl(aq).

5 0

3 years ago

PLEASE HELP!! Use numbers to indicate the order of the steps in the titration process.

liberstina [14]

7 5 1 8 3 6 2 4 is correct

7 0

3 years ago

Read 2 more answers

Classify each of the following properties of a cake as qualitative or quantitative. Give reasons for your answers

VashaNatasha [74]

Answer:

The answer to your question is below

Explanation:

A qualitative property of matter is a property characteristic of a substance like color and flavor.

A quantitative property of matter is a property when we get a number.

A) it's a circular shape is a qualitative property because the shape is a qualitative property and shape is not represented by a number.

B) its mass is 1.5 kg is a quantitative property because we know a number of this mass.

C) it tastes like chocolate is a qualitative property because the flavor is characteristic of a substance and flavor is not measured in numbers.

D) it is 30 cm in diameter it is a quantitative property, we know the exact dimension of it.

E) its icing is melting is a qualitative property, melting is a property of ice, it just happens.

4 0

4 years ago

What is the molar mass of NH4Cl

adoni [48]

53.491 g/mol

Hope it helps. :)

6 0

3 years ago