An object has a mass of 100kg and a volume of 10m^3. What is its density?

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If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3

Is the idea of spontaneous generation supported by redi's experiment? justify your answer in 2-3 sentences?

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?