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A decrease in temperature will affect the rate of which of the following reaction

jok3333 [9.3K]

You didn't put the reactions

6 0

3 years ago

How many grams of NaI are needed to prepare 400.0 mL of 0.0500 M NaI solution?

Simora [160]

Answer:

3g of NaI is needed to prepare 400.0 mL of 0.0500 M NaI solution.

Explanation:

A 0.0500M solution means that is 0.0500 moles of NaI per every 1000 mL of solution. Thus, to prepare 400mL:

$\frac{400mL}{1000mL}x0.0500moles=0.0200moles$

Also, the molar mass of NaI is 127g/mol + 23g/mol = 150g/mol

Consequently, multiplying the molar mass of NaI by the moles the necessary mass is obtained:

$150\frac{g}{mol}x0.0200moles = 3g$

4 0

3 years ago

Read 2 more answers

A chemist reacted 17.25 grams of sodium metal with an excess amount of chlorine gas. The chemical reaction that occurred is show

Afina-wow [57]

<u>Answer:</u> The actual yield of the product is 38.57 g

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

We are given:

Given mass of Na = 17.25 g

Molar mass of Na = 23 g/mol

Putting values in equation 1, we get:

$\text{Moles of Na}=\frac{17.25g}{23g/mol}=0.75mol$

For the given chemical reaction:

$2Na+Cl_2\rightarrow 2NaCl$

By stoichiometry of the reaction:

2 moles of Na produces 2 moles of NaCl

So, 0.75 moles of Na will produce = $\frac{2}{2}\times 0.75=0.75mol$ of NaCl

We know, molar mass of $NaCl$ = 58.44 g/mol

Putting values in above equation, we get:

$\text{Mass of NaCl}=(0.75mol\times 58.44g/mol)=43.83g$

The percent yield of a reaction is calculated by using an equation:

$\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100$ ......(1)

Given values:

Percent yield of the product = 88 %

Theoretical value of the product = 43.83 g

Plugging values in equation 1:

$88\% =\frac{\text{Actual yield}}{43.83g}\times 100\\\\\text{Actual yield}=\frac{88\times 43.83}{100}=38.57g$

Hence, the actual yield of the product is 38.57 g

3 0

3 years ago

Read the given equation:NH3 + HCI —> NH4CIWhich of the following is true about the equation?a) NH3 is the acid and NH4CI is t

Nutka1998 [239]

Explanation:

For the given equation:

NH3 + HCl -> NH4Cl

This is an acid-base reaction (neutralization): NH3 is a base, HCl is an acid and NH4Cl is the sal.

Answer: b) NH3 is the base and NH4CI is the salt.

8 0

1 year ago

Which component of a river system is made of streams and small rivers that feed into a large river? Which component of a river s

inn [45]

Explanation: A river drainage basin is an area drained by a river and all of its tributaries. A river basin is made up of many different watersheds. A watershed is a small version of a river basin. Every stream and tributary has its own watershed, which drains to a larger stream or wetland.

8 0

3 years ago