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Ymorist [56]
3 years ago
9

Leila made herself a cup of hot chololate weighing 150 grams. If she started with 125 grams of milk, how many grams of hot choco

late mix did she add?
Chemistry
1 answer:
Jobisdone [24]3 years ago
6 0

Answer:

150g-125g

=25 of hot chocolate mix

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What is the atomic number, mass number, element symbol, group number, and period number for oxygen?
yawa3891 [41]

Answer:

Atomic no. = 8

Mass no. = 16

Period no. = 2

Group no. = 6

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HELPPP MEE I NEED HELPP PLEASE
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B.Michanine

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Give the hybridization shape and bond angle for each carbon in ch3cn
IrinaVladis [17]

Answer:

C-sp, tetrahedral, 180

C-s-p, linear, 180

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4 years ago
Según la Organización Mundial de la Salud, el nitrato de plata ( densidad = 4.35 g/cc ) es una sustancia con propiedades cáustic
OlgaM077 [116]

Answer:

737.52 mL de agua

Explanation:

En este caso solo debes usar la expresión de molaridad de una solución la cual es:

M = moles / V

Donde:

V: Volumen de solución.

Como queremos saber la cantidad de agua, queremos saber en otras palabras cual es la cantidad de solvente que se utilizó para preparar los 800 mL de disolución.

Una disolución se prepara con un soluto y solvente. El soluto lo tenemos, que es el nitrato de plata. Con la expresión de arriba, calculamos los moles de soluto, y luego su masa. Posteriormente, calculamos el volumen con la densidad, y finalmente podremos calcular el solvente de esta forma:

V ste = Vsol - Vsto

Primero calcularemos los moles de soluto:

moles = M * V

moles = 2 * 0.800 = 1.6 moles

Con estos moles, se calcula la masa usando el peso molecular reportado que es 169.87 g/mol:

m = moles * PM

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Ahora usando el valor de la densidad, calcularemos el volumen de soluto empleado:

d = m/V

V = m/d

V = 271.792 / 4.35

V = 62.48 mL

Finalmente, la cantidad de agua necesaria es:

V agua = 800 - 62.48

V agua = 737.52 mL

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3 years ago
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