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Nikolay [14]
3 years ago
6

Asapp please

Chemistry
1 answer:
guapka [62]3 years ago
8 0

The empirical and  molecular formula : C₂₁H₂₂N₂O₂

<h3>Further explanation</h3>

Given

The percent composition of an unknown substance is 75.42% Carbon, 6.63 % Hydrogen, 8.38 % Nitrogen, and 9.57 % Oxygen

Required

The empirical and  molecular formula

Solution

C : 75.42 : 12 = 6.285

H : 6.63 : 1 = 6.63

N : 8.38 : 14 = 0.599

O : 9.57 : 16 = 0.598

Divide by 0.598

C : H : N : O = 10.5 : 11 : 1 : 1 = 21 : 22 : 2 : 2

The empirical formula : C₂₁H₂₂N₂O₂

(C₂₁H₂₂N₂O₂)n = 334

(334)n=334

n = 1

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Convert 18.63 mol Nicly to grams.
ddd [48]

Answer:

1093.458042 grams

Explanation:

1 mole is equal to 1 moles Nickel, or 58.6934 grams. So I think you can unsterstand how I did the math if you have any questions let me know.

6 0
3 years ago
A prescription medication requires 0.00255g per lb of body weight.
Pani-rosa [81]

The prescription in mg/Kg of body weight is 5.62 mg/kg.

<h3>How to convert to mg required per kg of body weight?</h3>

Drugs are chemicals that are taken into the body and they are able to help to correct anomalies in the bodies. Drugs are taken according to the kind of ailment that a person is suffering from.

The nature of the drug and the severity of thee ailment of the person determines the dose of the drug.

Now we know that;

1 g/pound =2204.6244 mg/kg

0.00255g/lb = 0.00255g/lb * 2204.6244 mg/kg/1 g/pound

= 5.62 mg/kg

Learn more about unit conversion:brainly.com/question/4736731

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Missing parts;

A prescription medication requires 0.00255 g per lb of body weight.  Convert this quantity to the number of mg required per kg of body weight.

5 0
2 years ago
Calculate the rate of temperature change from time 0 to time 4
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7 0
3 years ago
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Animals have internal stimuli or cues that help them survive. Which stimuli is external rather than internal?
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3 years ago
Calculate the osmotic pressure of a magnesium citrate laxative solution containing 25.5 g of magnesium citrate in 244 mL of solu
Vera_Pavlovna [14]

Answer:

The answer to your question is π = 12.47 atm

Explanation:

Data

mass of Magnesium citrate = 25.5 g

volume of solution = 244 ml

temperature = 37°C

molar mass C₆H₆MgO₇ = (12 x 6) + (1 x 6) + (24 x 1) + (16 x 7) = 214 g

Osmotic pressure = π = ?

Process

1.- Calculate the moles of magnesium citrate

                         214 grams ----------------- 1 mol

                          25.5 grams ---------------  x

                           x = (25.5 x 1)/214

                           x = 0.119

2.- Calculate molarity

Molarity = moles/volume

Molarity = 0.119/0.244

Molarity = 0.49

3.- Calculate osmotic pressure

π = MRT

π = (0.49)(0.0821)(37 + 273)

π = (0.49)(0.0821)(310)

π = 12.47 atm

7 0
3 years ago
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