Mineral is - - - 1) both neutral and artificial 2) only pure element 3) natural material 4) artificial material

2 A (g) + B (g) / longrightarrow⟶ 2 C (g) Rate = k [A][B] At the beginning of one trial of this reaction, [A] = 3.0 M and [B] = 1.0 M. The observed rate for the formation of C is 0.36 mol L-1 sec-1.

Which example involves a phase change in which heat energy is released by the substance? freezing ice cream cooking a pot of soup melting ice under sunlight watching frost disappear into air

The somatic system controls an animals

Why is it important to have a control group in an experimental investigation?

Urgent! How does a model differ from a law or a theory? a. Models are universal c. Theories are only accurate under limited conditions b. Models are for all situations d. Models are only useful in limited situations

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.