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Valentin [98]
3 years ago
12

Calculate the volume of compound Y needed to make a 350 pg/ml treatment solution in 2 ml of 1x PBS using a stock solution contai

ning 50 ml of compound Y at 50 pg/ml. 14 l Not possible to make as described 140 pl 1.4 mi
Chemistry
1 answer:
harina [27]3 years ago
4 0

Answer:

14 mL

Explanation:

To prepare a solution by a concentrated solution, we must use the equation:

C1xV1 = C2xV2, where <em>C</em> is the concentration, <em>V</em> is the volume, 1 is the initial solution and 2 the final solution.

The final solution must have 2 mL and a concentration of 350 pg/mL, and the initial solution has a concentration of 50 pg/mL.

Then:

50xV1 = 350x2

50xV1 = 700

V1 = 700/50

V1 = 14 mL

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What amount of oxygen contains 1.8 x 10^22
Ksenya-84 [330]
I believe you mean what amount  of O2 contains 1.8 x 10^22 molecules. 

Solution: Divide your number of molecules by the number of molecules in one mole (6.02 x l0^23)

02989 moles. Rounded to the nearest hundredths,.<span>0299</span>
4 0
3 years ago
Many home barbeques are fueled with propane gas (C3H8)(C3H8). Part A What mass of carbon dioxide is produced upon the complete c
Andrew [12]

Answer:

41264 g of CO₂

Explanation:

Combustion reaction is:

C₃H₈ + 5O₂ →  3CO₂  +  4H₂O

1 mol of propane react to 5 moles of oxygen in order to proudce 3 moles of carbon dioxide and 4 moles of water.

In a combustion reaction, our reactant reacts to oxygen and the products are always CO₂ and water.

We have the volume of propane but we need moles of it, so we need to apply density.

Density = mass / volume so mass = density . volume.

Density of propane is: 493 g/L

Mass of propane is 493 g/L . 27.9L = 13754.7 g

We convert mass to moles: 13754.7 g . 1 mol/ 44g = 312.6 moles

According to reaction, 1 mol of propane can produce 3 moles of CO₂

Our 312.6 moles will produce 312.6 . 3 = 937.8 moles

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3 0
2 years ago
2. List the numbers and types of atoms represented by these chemical formulas.
never [62]

This problem is providing some chemical formulas and the number and types of atoms are required according to them; thus, we proceed as follows:

<h3>Chemical formulas:</h3><h3 />

In chemistry, we define chemical formulas as expressions showing the types and number of atoms a substance has. The types of atoms are found across the periodic table and the number is defined by the subscripts appearing in the formula.

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d. It should be NH₄NO₃, ammonium nitrate, and in such a case it will have two nitrogen atoms, four hydrogen atoms and three oxygen atoms.

Learn more about atoms and chemical formulas: brainly.com/question/5716048

3 0
2 years ago
The vibration of which bond gives an IR absorption that distinguishes between the following two compounds? CH3 CH2 CH2 OH CH3 CH
liq [111]

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