When 400 grams of wood are burned, 30 grams of ash remained. What happened to the missing 370 grams of matter?

8 Gold can be flattened into an extremely thin sheet. The malleability of gold is due to the (I) radioactive decay, mode of the isotope An-19S (2) proton-to-neutron ratio in an atom of gold (3) nature of the bonds between gold atoms (4) reactively

The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene? A) C2H4 B) C8H8 C) C10H12 D) C6H6 E) none of these

A sample of gas at 300 K has a volume of 2.0 liters. At what temperature will the volume decrease to 1.0 liter if the pressure is kept constant? A. 600 K B. 150 K C. 250 K D. 650 K

Roundup an herbicide manufactured by monsanto has the formula c3h8no5p. how many moles of molecules are there in a 500g sample of roundup?

Which event would likely cause an agrarian society to begin developing irrigation techniques that conserve water? A. A shortage of fossil fuel resources B. The emergence of a new crop disease C. A period of drought D. An increase in air pollution

Before the initial explosion was the matter hot or cold

Which of the following atoms has seven valence electrons? chlorine (Cl) nitrogen (N) manganese (Mn) oxygen (O)

A.) During an experiment, a student adds 2.90 g of CaO to 400.0 mL of 1.500 M HCl. The student observes a temperature increase of 6.00 °C. Assuming the solution/'s final volume is 400.0 mL, the density if 1.00 g/mL, and the heat capacity is 4.

Consider the ionic compound magnesium acetate. How many electrons does the magnesium ion have

What are two parts of the peripheral nervous system