Mno2 + 4hcl = mncl2 + cl2 + 2h2o determine which reactant is excess

The density of a test tube is 2.3g/cm3. The volume of the test tube is 4 cm3. What is the mass of the test tube? A. 0.92 g B. 9.2g C. 9.3g D. 92g

If H2O (l) changes to H2O (s), what is the value of enthalpy change?

If nitrogen (N) has 2 naturally occurring isotopes, nitrogen-14 (78.3%) and nitrogen-16 (21.7%), what is its average r. a. m.?

Describe the experiments conducted by Thomson and Rutherford, and how the observations and evidence from each of these experiments led to changes in the model of the atom.

crude oil is an example of element compound mixture

What are the three particles of an atom? A. Neutron, electron, and ion B. Proton, ion, and valencium C. Proton, neutron, and electron D. Electron, proton, and isotope

A gas has a volume of 2L at STP. How many moles of the gas are present?

What happens when the magnet is removed from the coil in a circuit? a. The current stops c. The voltage decreases b. The current changes direction d. Power output increases

Which of the following is not an organic compound? Lipid Carbohydrate Water Protein

Rank the species (amide ion, ammonia, or ammonium ion) from the largest to the smallest H-N-HH-N-H bond angle? Rank from largest to smallest H-N-HH-N-H bond angle. To rank items as equivalent, overlap them.