Answer:
349.503 g
https://www.convertunits.com/from/moles+Copper/to/grams
here is a link, you can convert moles of copper to grams here
When the number of protons and electrons are equal, that means the element is neutral. So, to know the element, find the element with an atomic number of 10. That would be Neon. Next, solve the mass number.
Mass number = protons +neutrons = 10+11 = 21
Thus, the expression should be written as shown in the attached picture.
Answer:
Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.
Explanation:
Gold heats up about seven times faster than aluminium because gold has less (<span>different) numbers of particles per unit mass. Gold has greater atomic mass (197 g/mol) and greater atomic radius (size) of an atom than aluminium (27 g/mol) metal. Amount of substance is equal to mass of substance divided with molar mass of substance.</span>