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eduard
3 years ago
14

A student takes a measured volume of 3.00 M HCl to prepare a 50.0 mL sample of 1.80 M HCl. What volume of 3.00 M HCl did the stu

dent use to make the sample? Use mc020-1.jpg. 3.70 mL 16.7 mL 30.0 mL 83.3 mL
Chemistry
2 answers:
ivann1987 [24]3 years ago
7 0
Um in  not sure but i think is=t should be 60.2874

Yuliya22 [10]3 years ago
7 0
Use the dilution formula C1V1= C2V2

C1= 3.0 M
V1= ??
C2= 1.80 M
V2= 50.0mL

(3.0 M) x (V1)= (1.80 M) x (50.0 mL)

V1= 30.0 mL. 
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Tema [17]
HCL(g) it consists of covalently molecules which are bonded and they do not ionize.
Non-polar solvent molecules  do not attract molecules of HCL which cause them to be ionized.
3 0
3 years ago
What is the percent yield for carbon dioxide if 10.0 grams of carbon
ivolga24 [154]

The percent yield : 81.5%

<h3>Further explanation</h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

2CO+O₂⇒2CO₂

mol CO(MW=28,01 g/mol)

\tt \dfrac{10}{28.01}=0.357

mass CO₂ (theoretical)(MW=44,01 g/mol)

\tt 0.357\times 44.01=15.712~g

the percent yield :

\tt \dfrac{12.81}{15.712}\times 100\%=81.5\%

3 0
3 years ago
Every day a 6th grade class puts candy into bags to prepare for Valentine's Day. They put
Amiraneli [1.4K]
70 bags is the answer.
They add “They put 7 pieces of candy in each bag to throw you off”
To find the answer just divide 28 bags by 4 days to get how many bags they make in 1 day. Take that number “7” and multiply it by 10 days. The answer is then 70.
7 0
3 years ago
The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). If you breathe 15 times a minute (at res
Misha Larkins [42]

Answer:

Explanation:

Given parameters:

Number of breathe per minute = 15times

Volume of air per breath = 0.5L

Percentage of oxygen in air = 21%

Solution

There are 24 hours in a day.

 60minutes makes a hour in a day,

I will breathe:

           15 times x 60 x 24  = 21600 times in a day

The volume of air I will take in per day:

       A breathe = 0.5L of air

    21600breathe = 0.5 x 21600 = 10800L of air

Volume of oxygen I will breathe per day:

    \frac{21}{100} x 10800 = 2268L of oxygen

7 0
3 years ago
I would really appreciate help with this
Annette [7]

homogeneous: a substance maintaining a uniform appearance throughout.

miscible: the ability of two liquids to be mixed together.

immiscible: two liquids that will not mix with one another.

heterogeneous: a mixture consisting of visibly different substances or phases.

I hope you find this helpful.

8 0
3 years ago
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