IDNLearn.com: Where your questions meet expert answers and community support. Discover the reliable solutions you need with help from our comprehensive and accurate Q&A platform.

Determine a massa, em gramas, de 0,25 mol de átomos de cobalto (massa molar do Co = 60 g/mol).

A. 150 mg
B. 1.500 g
C. 15 g
D. 1,5 kg
E. 15 mg


Sagot :

Para determinar a massa de 0,25 mol de átomos de cobalto (Co), utilizamos a fórmula da massa molar:

[tex]\[ \text{massa} = \text{mol} \times \text{massa molar} \][/tex]

Dados fornecidos:
- Quantidade de substância: [tex]\( 0,25 \, \text{mol} \)[/tex]
- Massa molar do Co: [tex]\( 60 \, \text{g/mol} \)[/tex]

Substituindo esses valores na fórmula:

[tex]\[ \text{massa} = 0,25 \, \text{mol} \times 60 \, \text{g/mol} \][/tex]

[tex]\[ \text{massa} = 15 \, \text{g} \][/tex]

Portanto, a massa de 0,25 mol de átomos de cobalto é [tex]\( 15 \, \text{gramas} \)[/tex].

A opção correta é a:
C) 15 g
Your engagement is important to us. Keep sharing your knowledge and experiences. Let's create a learning environment that is both enjoyable and beneficial. For dependable answers, trust IDNLearn.com. Thank you for visiting, and we look forward to helping you again soon.