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Katarina [22]
4 years ago
6

How does a scientist make two solutions with the same molarity? A By dissolving the maximum amount of each substance in the B. B

y dissolving the same number of grams of each substance in the OC. By dissolving 1 mole of each substance in enough water to make same volume of water same volume of water sure dissolving is complete By dissolving the same number of nmoles of each substance in the same volume of water OD.​
Chemistry
1 answer:
aalyn [17]4 years ago
7 0

Answer: The answer is “ By dissolving the same number of nmoles of each substance in the same volume of water ”

Explanation:

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Which of the following solvents will best dissolve wax, which is a complex mixture of compounds that mostly are CH3−CH2−CH2−CH2−
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Wax will be dissolved by nonpolar solvents: (a) hexane, (b) benzene and (d) carbon tetrachloride

Wax will not be dissolved by polar solvent such as (c)  acetone and (e) water

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4 years ago
How many grams of naoh are needed to make 750 ml of a 2.5 (w/v) solution?
OverLord2011 [107]
Concentration: 2.5% w/v

Concentration w/v % = [mass of solute / volume of solution ] * 100

=> mass of solute = concentration w/v * volume of solution / 100

=> mass of solute = 2.5 * 750 ml / 100 = 18.75 grams

Also, using proportions you get to the same result:

2.5% w/v => 2.5 grams of NaOH / 100 ml of water

=> 2.5 grams of NaOH / 100 ml water = x grams of NaOH / 750 ml water

=> x grams of NaOH = 750 ml water * 2.5 grams of NaOH / 100 ml water

=> x = 18.75 grams of NaOH

Answer = 18.75 grams of NaOH
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3 years ago
_______ can be generally defined as a change in position.
r-ruslan [8.4K]
B. Motion is the answer.
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Nitric acid is also found in acid rain. Write a word equation for the reaction of iron with nitric acid
Natasha_Volkova [10]

The reaction between iron and nitric acid eventually produces a red-brown rust colour (iron(III) oxide). could link this with corrosion and acid rain

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3 years ago
Dos moléculas de Clorato de Potasio en estado sólido, al aplicarle calor se descompone en dos moléculas de Cloruro de Potasio en
DedPeter [7]

Answer:

2KClO3 (s) -------> 2KCl (s) + 3O2 (g)

Explanation:

Una ecuación de reacción química es una representación simbólica de lo que sucede en un recipiente de reacción.

Al escribir la ecuación de reacción química para una reacción particular, se utilizan los símbolos químicos de todas las especies involucradas.

Por la reacción. en el cual dos moléculas de Clorato de Potasio en estado sólido, al aplicar calor se descompone en dos moléculas de Cloruro de Potasio en estado sólido y tres moléculas diatómicas de Oxígeno en estado gaseoso, la ecuación de reacción se escribe así;

2KClO3 (s) -------> 2KCl (s) + 3O2 (g)

La regla para escribir ecuaciones de reacción química balanceada es que el número de átomos de cada elemento en el lado derecho de la ecuación de reacción debe ser el mismo que el número b de átomos del mismo elemento en el lado izquierdo de la ecuación de reacción.

Si realizamos un conteo de átomos simple en ambos lados de la ecuación de reacción, la regla se cumple

7 0
3 years ago
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