What is the color of the shadow when the light is red?

6. An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestone-rich soils. To prepare this buffer she will add solid Na2CO3 (106.0 g/mol) to 1.50 L of 0.20 M NaHCO3. (Ka = 4.

On the ph scale, indicate which direction is increasingly acidic and which is increasingly basic.

Use the terms above to identify each type of energy below energy that comes from a moving object, or objects have stored energy One that comes from the movement of partides energy that comes from moving electrons one that occurs when nuclear bonds

Find oxidation numbers for the following: Cl: Be: Al: Ca: O:

Which of the following choices represents a balanced chemical equation? Ca3 (PO4) 2 + 6SiO2 → P4O10 + 3CaSiO3 2Ca3 (PO4) 2 + 6SiO2 → P4O10 + 6CaSiO3 2Ca3 (PO4) 2 + 3SiO2 → 2P4O10 + 2CaSiO3 3Ca3 (PO4) 2 + 2SiO2 → P4O10 + 4CaSiO3

What mass of CO2 will sublimate given 500 kJ of energy at room temperature? (ΔHsub=26.1kJmole)

A sample of helium, at 20 °c, occupies a volume of 3.17 l at a pressure of 6.21 atm. what volume does this helium sample occupy if the pressure is reduced to 5.57 atm while maintaining the temperature at 20 °c?

List the different kinds of nitrogen bases

What is the purpose of the scientific method? A. To make a guess in order to prove a hypothesis B. To provide a reliable answer to a specific question C. To remove any source of bias in an experiment D.

Given the balanced equation: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, what is the total number of moles of O₂ required for the complete combustion of 1.5 moles of C₃H₈?