MATH. Tom bought 15 party hats priced at 3 for $0.65 and 56 noisemakers priced at 7 for $1.25. What was the total cost of the hats and noisemakers, not including tax?

A. $9.75

B. $8.75

C. $10.70

D. $13.25

If 35.7 kPa of Bromine gas takes up 41.3 L, how much volume will the gas take up at 13.8 kPa

An iron atom has an atomic number of 26 and an atomic mass of 55.8 amu. How many protons does an iron atom have?

Considering the IMA of this frictionless inclined plane, how much force is required to drag a 90 lb. box up it? A. 109 lb B. 10 lb C. 81 lb D. 9 lb

Consider what you know about the atmosphere. Explain the following: What is a temperature inversion? Where do the temperature inversions occur in the atmosphere? What causes the major temperature inversions in the atmosphere?

What is a mineral phase change? a. when a mineral melts from a solid state to a liquid state b. the exterior of a mineral weathers and changes color c. a mineral changes density because of the addition of water d.

How many moles are in. 12 grams of gold.

When lithium reacts with bromine to form the compound LiBr, each lithium atom: (1) gains one electron and becomes a negativelycharged ion (2) gains three electrons and becomes a negativelycharged ion (3) loses one electron and becomes a

Based on what you know about matter, explain why the food coloring mixes at different rates

What does the variable A stand for in the Arrhenius equation? A. activation energy B. frequency factor C. rate constant D. reactant concentration

Name 3 sets of elements that have been added to the periodic table since mendeleev's time