The nearest whole number of 99.59

What ions are released when acid is mixed with water

A sample of gold (Au) has a mass of 35.12 g. what is the moles of each element for AU?

Both hydrogen sulfide and ammonia have strong, unpleasant odors. which gas had the higher effusion rate? if you opened a container of each gas in a corner of a large room, which odor would you detect first on the other side of the room?

When the equation for the combustion of ethane, C2H6, is correctly balanced, the coefficient on oxygen is:

Which subatomic particles are located in the nucleus of a carbon atom? (1) protons, only (2) neutrons, only (3) protons and neutrons (4) protons and electrons

Which of the following compounds will produce H2O as one of the products when it decomposes? a.) Hg (ClO3) 2 b.) Cu (OH) 2 c.) CaO d.) MgCO3

After 10 years, 75 g of an original sample of 100 g of a certain radioactive isotope has decayed. the half-life of the isotope is

When 10.7 g of Al are reacted with 42.5 g of HCl, what volume of H2 will be produced at 47 C and 725 mmHg? Formula: 2Al+6HCl=2AlCl3+3H2

Increasing the temperature increases the rate of a many reactions by:

2A balloon filled with helium occupies 20.0 L at 1.50 atm and 25°C. How many moles of helium will there be in the balloon at STP? A. 22.4 moles B. 1.12 moles C. 0.0446 moles D. 0.893 moles E. 1.23 moles F. 4.55 moles