When you turn off lights in empty rooms, what are you practising?

Star x has a magnitude of 13. star y has a magnitude of 10. the brightness is?

What happens to the pressure inside a rigid container if the amount of nitrogen gas increases from 0.500 mole to 0.750 mole? The original pressure is 98.0 kPa, and the temperature remains constant.

Which of the following is a compound? options: nitrogen air oxygen water

In the reaction __H2 + O2 → 2H2O, what coefficient should be placed in front of H2 to balance the reaction? 1 2 3 no coefficient is needed

Naturally occurring copper is 69.15% copper-63 (atomic mass = 62.93 amu) and 30.85% of some other isotopic form of copper. what must the atomic mass of this second isotope be in order to account for the 63.

Which part of the body does colchicine affect the most

Balance and identity the type of chemical reactions. Mg (s) + HNO3 (aq) - > H2 (g) + Mg (NO3) 2 (aq)

Which radioactive element is used to determine the absolute age of late pleistocene animal remains?

Compare the practical uses and limitations of nuclear fission and fusion. Include in your answer a detailed description of the two processes, comparing and contrasting them in terms of the types of atoms involved, the conditions needed to get the

Why can two igneous rocks have the same minerals but different names?