If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass? 4.48% MgO 18.3% MgO 22.3% MgO 28.8% MgO

You have stock soultion of 6.0m HCL. how would dilute it in order to prepare 500ML of 2.0ml HCL

2H2+O2 2H2O. Calculate the moles of water formed when 14 moles of hydrogen react.

Which city had the highest temperature

Which of these is a unique property of bases? a. contains a carbon b. tastes sour c. conducts electricity in solution d. feels slippery

When a chemical reaction is at equilibrium, the concentration of each reactant and the concentration of each product must be (1) constant (2) variable (3) equal (4) zero

A piece of glass with a mass of 32.50 g specific heat of 0.840 J/g*°C and an initial temperature of 115 °C was dropped into a calorimeter containing 57 g of water (specific heat 4.184 J/g*°C).

Which of the following is the most likely description of the product or products of a double-displacement reaction? A) one new compound B) two new compounds C) oxygen and energy D) one new compound and an element

A balloon is filled with 12L of air at a pressure of 2 atm. What is the volume of ballon if the pressure is changed to 3 atm?

What ionic bond occurs between what particles? A. Two Negative Ions B. A positive and negative ion C. Two positive ions D. Two neutral atoms

Which of the following are good traits of a hypothesis? it will be able to be tested it can predict an outcome it will explain the observations all of these