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myrzilka [38]
3 years ago
10

How many molecules of carbon monoxide are in 10 mL at STP

Chemistry
1 answer:
mote1985 [20]3 years ago
7 0

 The number  of  carbon monoxide that  are in 10 ml at STP  is 2.68 x 10²⁰  molecules

<u><em>  calculation</em></u>

<u><em> </em></u>Step 1 :  convert 10 ml to L

convert 10 ml to L = 10/1000 =0.01 L

Step 2: find the moles of CO at STP

That is at STP  1  mole  = 22.4 L

                           ?moles = 0.01 L

by cross  multiplication

= {0.01 L x 1 mole)/22.4 L} =4.46 x 10⁻⁴  moles


Step 3 ; find the  number of   molecules of Co  using the Avogadro's law constant

that  according to Avogadro's  law  1  moles = 6.02 x 10²³

                                                  4.46 x 10⁻⁴ moles =? molecules

<em>by cross multiplication</em>

= {(4.46 x 10⁻⁴  moles) x( 6.02 x 10²³  molecules) / 1 mole}  =2.68 x 10²⁰  molecules


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If a 4L solution is 80% concentrated lime juice and 20% water, how much 30% concentrated lime juice must be added so that the co
miv72 [106K]

The volume of 30% concentrated lime juice that must be added to a 4L solution of 80% concentrated lime juice and 20% water is 6 L.

<h3>What are mixtures?</h3>

Mixtures are substances which are formed when two or more substances are physically combined together.

Mixtures are heterogenous in nature and the constituents can be easily separated.

The volume of 30% concentrated lime juice that must be added to a 4L solution of 80% concentrated lime juice and 20% water, so that the concentration of the resulting solution is 50% concentrated lime juice is determined as follows:

Let the volume of 30% lime juice required be x;

total volume of lime juice = 0.3x

For 80% lime juice, volume of lime juice = 0.8 * 4 = 3.2 L

New volume of lime juice = 4 + x

New amount of lime juice added = 3.2 + 0.3x

Also, new amount of lime juice = 0.5 * ( 4 + x)

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In conclusion, the volume to be added is obtained from the percent concentration.

Learn more about percent concentration at: brainly.com/question/19379932

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