Why do you need to think about polarity of the different ingredients in your salad dressing in order for it to turn out well?

Newton's second law of motion uses the formula which states that a force will cause a mass to accelerate. (f = m • a. rewrite the formula to solve for a.

Classify each of the following properties as physical or chemical: A. Ice melts in the sun. B. Copper is a shiny metal. C. Paper can burn. D. A silver knife can tarnish. E. A magnet removes iron particles from a mixture.

Find the molar mass Na3PO4

Calculate the wavelength in nanometers of the light emitted by a hydrogen atom when it's electron falls from the n = 7 to the n = 4 principal energy level. Recall that the engergy levels of the H atom are given by En = - 2.

How many electrons are present in 4He2+? 1. 6 2. 4 3. 1 4. 2 5. 0 6. None of these 7. 3 8. 5

1 75 ml of lemon juice are added to 50 ml of water. What is the percent by vo of the solute?

How many moles of tungsten atoms are in 4.8 x 1025 atoms of tungsten?

At what speeds do you criuse down the track of a roller coaster

A sample of hydrogen gas is mixed with water vapor. The mixture has a total pressure of 755 torr and the water vapor has a partial pressure of 24 torr. What amount (in moles) of hydrogen gas is contained in 1.55 L of this mixture at 298 K?

Both equation I and II are balanced, but equation II is the correct way to write the balanced equation. Why do you think this is? (Hint: Think fractions.) I) 2 SnO2 + 4 H2 → 2 Sn + 4 H2O II) SnO2 + 2 H2 → Sn + 2 H2O