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stiv31 [10]
3 years ago
7

1- Calcular la concentración molar de una solución de carbonato de sodio, Na2CO3, que contiene 10,6 g de esta sal en 1 L de solu

ción.
2- El contenido de cafeína en una taza de café de 125 mL es de 0,125 g. Calcule la concentración molar de esta solución, si la fórmula molecular de la cafeína es C8H10N4O2.

3- Una solución de MgCl2 se preparó al 29 %m/v, calcular la molaridad de la mezcla.

4- Determine la concentración molar y molal para una solución de HCl al 35 %m/m y densidad 1,18 g/mL.

5- ¿Cuál es la masa de Nitrato de potasio, KNO3 (MM = 101 g/mol), que está presente en 30 mL de solución 0,45 M?

6- ¿Cuál es la fracción molar de una solución que se prepara mezclando 10 g de metanol, CH4O y 27 g de agua?
Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
5 0

Answer:

idk bc yo no hablo espanial

Explanation:

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Answer:

187.5558 mol

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What effect does removing predators have on prey?
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What effect does removing predators have on prey?

:It means that as they are removed the predators go hungry and they could become extinct.

Hope I helped!
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2 years ago
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melamori03 [73]
Brass is an alloy, or a combination of two (or more) metals.
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3 years ago
what are the elements of the following compounds: sodium bromide,zinc sulphide,lead oxide,magnesium nitride,potassium oixide​
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4 0
2 years ago
A student analyzed an antacid tablet from a bottle containing 120 tablets purchased for $2.79. The mass of the tablet was 1.247
BaLLatris [955]

The cost of one antacid is 2.325 cents per tablet.

<u>Explanation:</u>

As per the question based on the student analysis we know that,

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Cost of 1 antacid tablet =\frac{2.79}{120}  

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5 0
3 years ago
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