Answer:
It's B)
A is a solute and C seems like a solution, so it's B
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Answer:
True
Explanation:
Reason being there are 3 systems even in the open system the heat and matter goes in and out , the closed system the heat goes in and out as well and in the isolated system it stays in
Answer:
Explanation:
The solution of known concentration is expressed as molarity. Molarity is the mole fraction of solute (i.e. the dissolved substance) per liter of the solution, Molarity is also commonly called molar concentration.
Mathematically;
To copy and complete the road map from the given question, we have the following array:
Volume A (L)
↓
d. multiplied by the molarity of A
↓
moles A
↓
b. multiplied by the moles of B / moles of A
↓
moles B
↓
c. divided by the molarity of B
↓
volume B (L)
Answer:
,
Explanation:
Hydrocarbons are compounds which only consist of hydrogen atoms and carbon atoms. The presence of any other atom, such as oxygen, any halogen, nitrogen or sulfur, would not let us classify a compound as hydrocarbon.
Regardless of the number of atoms present in the structure, all we need to identify a hydrocarbon is just to make sure that it contains merely carbon and hydrogen atoms.
Notice that the first compound only consists of C and H atoms, so it is a hydrocarbon, just as compound 2.
The third and the fourth compounds have oxygen in them, so they are not hydrocarbons, as they don't have only C and H atoms in them.
Si reaccionan 50 g de silicio (P.A. = 28,08 g) con 80 % de pureza y suficiente oxígeno, se podría obtener A. 1,42 moles de SiO₂.
Consideremos la ecuación balanceada para la reacción entre silicio y oxigeno.
Si + O₂ ⇒ SiO₂
Tenemos 50 g de silicio con una pureza del 80%. La masa pura de silicio es:
Podemos calcular los moles de SiO₂ obtenidos a partir de 40 g de Si usando los siguientes factores de conversion:
- La masa molar de Si es 28,08 g/mol.
- La relación molar de Si a SiO₂ es 1:1.
Finalmente, convertiremos 1,42 moles de SiO₂ a gramos usando su masa molar (60,08 g/mol).
Si reaccionan 50 g de silicio (P.A. = 28,08 g) con 80 % de pureza y suficiente oxígeno, se podría obtener A. 1,42 moles de SiO₂.
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