900 gram of water at 80 degree Celsius is mixed with 2 kg of water at 20 degree celcius . Calculate the temperature of mixture.​

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms

If an atom has 12 protons and 13 neutrons