zitterkoph
30.10.2019 •
Chemistry
This stadium can hold 100,000, or 1 x 10^5, people. the number of atoms in a grain of iron is about 1 x 10^18. would you need 1 x 10^10 or 1 x 10^13 stadiums to hold the same number of people as the number of atoms in a grain of iron? explain your answer.
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Ответ:
1 x 10^13 stadiums
Explanation:From the question;
1 x 10^5 people can fill 1 stadium
We are given, 1 x 10^18 atoms of iron
We are required to determine the number of stadiums that 1 x 10^18 atoms of iron would occupy.
We are going to assume that a stadium would occupy a number of atoms equivalent to the number of people.
Therefore;
One stadium = 1 x 10^5 atoms
Then, to find the number of stadiums that will be occupied by 1 x 10^18 atoms;
No. of stadiums = Total number of atoms ÷ Atoms in a single stadium
= 1 x 10^18 atoms ÷ 1 x 10^5 atoms
= 1 x 10^13 stadiums
Therefore, 1 x 10^18 atoms of iron would occupy 1 x 10^13 stadiums
Ответ:
0.0375 moles.
11.03 gramos.
Explanation:
¡Hola!
En este caso, dado que la definición de molaridad viene dada por:
En dónde el volumen viene dado en litros, primero es necesario convertir 300 mL a litros:
Ahora, cómo se nos da la molaridad y el volumen, es posible calcular las moles como sigue:
Seguidamente, como la masa molar del dicromato de potasio es 294.18 g/mol, la masa a pesar será de:
¡Saludos!