4 years ago

Fill in the word that correctly completes this sentence.

Chemistry

1 answer:

crimeas [40]4 years ago

5 0

Mixtures are made up of 2 or more substances that are together in the same place but aren’t chemically bonded.

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How many mL can you make of a .225 M solution if you<br> have 458 mL of a .500 M solution available?

tigry1 [53]

Answer:225000 milliliters

Hope this helps.Sorry id you get this wrong

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4 years ago

Given the balanced equation: Pb(NO₃)₂(aq) + 2NaCl(aq) ➔ PbCl₂(s) + 2NaNO₃(aq). What type of reaction is represented by this equa

Lilit [14]

Answer: The given reaction is a double displacement reaction.

Explanation:

A chemical reaction in which two different compounds chemically react with each other by switching places of both positive and negative ions is known as a double displacement reaction.

For example, $Pb(NO_3)_2(aq) + 2NaCl(aq) \rightarrow PbCl_2(s) + 2NaNO_3(aq)$

Here, both $Pb^{2+}$ and $Na^{+}$ ions switched places. Also, both $(NO_3)^{-}_{2}$ and $Cl^{-}$ ions switched places.

Therefore, we can conclude that the given reaction is a double displacement reaction.

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3 years ago

A scientist observes rock masses that have moved past each other in opposite horizontal directions. Which feature does the scien

Advocard [28]

Answer: strike-slip fault

Explanation:

5 0

3 years ago

Read 2 more answers

4 ) A sample of gas has a pressure of 1 atm while occupying 300 What volume will the gas occupy at 2 atm ? 10 points total . Sho

Gnesinka [82]

Answer:

It would be 600

Explanation:

300 x 2 = 600

4 0

3 years ago

Calculate the change in the standard entropy of the system, delta s degree for the synthesis of ammonia from N_2(g) and H_2(g) a

Svet_ta [14]

Answer:

$\Delta S^{0}$ for the reaction is -198.762 J/K

Explanation:

$N_{2}(g)+3H_{2}(g)\rightarrow 2NH_{3}(g)$

Standard change in entropy for the system ( $\Delta S^{0}$ ) is given by-

$\Delta S^{0}=[2moles\times S^{0}(NH_{3})_{g}]-[1mole\times S^{0}(N_{2})_{g}]-[3\times S^{0}(H_{2})_{g}]$

where $S^{0}$ represents standard entropy.

Here $S^{0}(NH_{3})_{g}=192.45J/(K.mol)$ , $S^{0}(N_{2})_{g}=191.61J/(K.mol)$ and $S^{0}(H_{2})_{g}=130.684J/(K.mol)$

So, $\Delta S^{0}=[2\times 192.45]-[1\times 191.61]-[3\times 130.684]J/K=-198.762J/K$

3 0

3 years ago