Answer:0.305g
Explanation:
mass = 79.9x(2.3 x 10^21) / (6.02 x 10^23)
= 0.305
Oxygen and neon are both elements. Oxygen has 8 electrons and 8 protons. Neon has 10 electrons and 10 protons. Oxygen is also a non-metal element and Neon is a noble gas.
is this a multiple choice question?
Answer:

Explanation:
Hello there!
In this case, according to this equilibrium temperature problem, we can set up the following equation to relate the mass, specific heat and temperature change:

Thus, we solve for the mass of cobalt as shown below:

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