Which of the following instruments is used to measure air pressure?

a. Barometer

b. Thermometer

c. Anemometer

d. Hygrometer

Which of these represents a synthesis reaction? A. AgNO3 + HCl - > AgCl + HNO3 B. Zn + 2HCl - > ZnCl2 + H2 C. N2 + 3H2 - > 2NH3 D. 2KClO3 - > 2KCl + 3O2

Two substances that have the same number of moles of representative particles always have: Answer the same number of atoms the same masses the same weights none of the above

The solubility of Pb (NO 3) 2 is 55 grams per 100 g H 2O at 20°C. Which term would properly describe a solution where 44 grams of Pb (NO 3) 2 is added to 100 grams of water at this temperature?

Which is the most practical argument for the continued funding of space exploration? a) Space exploration will one day show whether life exists on other planets in star systems similar to ours.

Why is NX3 Unstable? ... ?

Determine the number of moles of sulfur trioxide produced when 3.5 moles of oxygen gas is consumed in the reaction

For each of the following balanced oxidation-reduction reactions, (i) identify the oxidation numbers for all the elements in the reactants and products and (ii) state the total number of electrons transferred in each reaction. 1.

Hypervitaminosis is a serious health threat associated with excessive amounts of ingested fat-soluble vitamins. why do water-soluble vitamins not commonly pose the same threat?

Hydrogen is an element with two naturally occurring isotopes: 2 H and 3 H. This means that 2 H, which has a mass number of 2, has fewer than 3 H, which has a mass number of 3. True/False

C₂H₂ + O2 - CO₂ + H₂ How many moles of oxygen are necessary to react completely with 4.0 moles of propane (CH) ?