What is the half-life of a 3 g sample of radioisotope that decayed to 0.75 g in 30 days?

27. How much energy is required to change 150.0 g of water from 10.0°C to 45.0°C? (Cwater = 4.18 J/g °C) A. 125.43 B. 627.03 C. 219003 D. 28200 3

2H2+O2->2H20 How many moles of water can be produced if 8 moles H2 are used

Balance the equation Ca0 + HNO3 arrow Ca (N03) 2 + H20

Got it on my own so I deleted the original

How many calories are absorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20 c to 30 c

Which radiation detection device is the best to use for measuring the presence of radiation in large moving objects where constant monitoring is impossible? film badge Geiger counter cloud chamber scintillation counter

Smoke fiilling up a room is diffusion or not

What is the independent and dependent variable for a dry ice experiment

a substance that undergoes a physical change like melting is still the same substance is it true or false

What is a polar molecule