mandyj5477
04.08.2019 •
Spanish
Escoge uno de estos temas y háblanos de tus experiencias: utiliza un verbo en el presente, un verbo en el pretérito, un verbo en el imperfecto y otro verbo en el futuro. puedes usar más verbos que eso pero trata de expresarte bien contándonos algo personal. english: see the message table choose one of these topics and tell us about your experiences. it uses a verb in the present, a verb in the past, a verb in the imperfect and another verb in the future. you can use more verbs than that but try to express yourself by telling us something personal. the topic is family, school, or vacation
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Ответ:
Mi familia y yo estamos en el cine hoy.-presente
Mi familia y yo iremos para el cine la semana que viene.-futuro
Ответ:
6.02 x 10^23= 1 mol
As you can see, before we can convert to particles, we need moles. So let's first convert grams to moles using the molar mass (molecular weight) of the compound
molar mass of SrCO₃= 87.6 + 12.0 + (3 x 16.0)= 147.6 g/mol
53.79 g (1 mol/ 147.6 g)= 0.364 mol
now let's convert moles to particles using Avogadro's number
0.364 mol SrCO₃ (6.02x10^23/ 1 mol)= 2.19 x 10^23