Which of the following represents a change in state? A) rain becomes ground water B) tide water recedes C) an icicle drips D) a snowflake comes to rest

A pressure of 760.0 mm hg is equal to

Does the law of conservation of mass apply to physical changes or just chemical changes?

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

Using paper chromatography, how can you separate a homogeneous mixture into its component chemicals?

A scientist has just developed a composite drug to fight seasonal allergies. What's the next step in the engineering process before the drug is released?

What kind of reaction occurs when you mix aqueous solutions of barium sulfide and sulfuric acid?

What is true about empathy? Most anyone can learn this skill. Not everyone can learn this skill. It is a desirable attribute. choices A and C

What effect can new observations have on a scientific theory

The total number of valence electrons in the phosphate ion is

The reaction below has an equilibrium constant kp=2.2*106 at 298 k. 2cof2 (g) ⇌co2 (g) + cf4 (g) calculate kp for the reaction below. cof2 (g) ⇌12co2 (g) + 12cf4 (g)