What mass of sugar should be dissolve in 30g of water to ger 25 percentage weight by weight solution

Which statement about covalent compounds is true? They are able to melt at high temperatures. They are poor conductors of heat. They have strong intermolecular attractions. They have atomic bonds that are easy to break.

What units should they have used in order to make the correct conversion

How many calories are required to raise the temperature of 50.0 grams of water to 75.0 °C

Sprite has a [H+] =.000045 M. What is its pH?

Classify each of the following chemical reaction (check all that apply): combination, precipitation, single replacement, combustion, double replacement, acid-base, decomposition (1) HI (aq) + NaOH (aq) → Nal (aq) + H20 (l) (2) CuSO4 (aq) + ZnCrO4

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.