General Chemistry Answers

In the reaction 3 MgCl₂+ 2 K₃PO₄ to Mg₃(PO₄)₂ + 6 KCl, how many moles of KCI will form if 4.0 moles of K₃PO₄ react?

³H decays with a rate constant of 0.0563/yr. What is the activity of a 0.699 g sample in curies?

What is the name of the compound CaOCI2

Methanol (CH3OH) is also known as wood alcohol and can be used as a fuel. When one mole of methanol is burned, 1453 kJ of heat are evolved. When methanol is burned in a bomb calorimeter, 126 kJ of heat are evolved by the methanol. How many mL of methanol (d = 0.791 g/mL) were burned?

A packed bed of height 1.3 m is filled with spherical particles of same size. The particles density is 900kg/m³ .and they are non-porous. The fluid in the bed is air of having density of 1kg/m³ . The void fraction is given as 0.35. Calculate the pressure drop at the incipient kg m fluidization

In a lab, you are studying a new chemical reaction involving a weak base, B. This chemical reaction is pH sensitive and is most efficient in a solution with a pH of 4.50.

Your idiot boss gives you the following solutions and commands you to create 52.5 mL of a pH 4.50 buffer solution with a total concentration of 0.100 M. Calculate the volume of each component (in mL) and the volume of water (in mL) that is required to make the buffer. (10 pts)H3A: pKa1 = 1.579, pKa2 = 4.801, pKa3 = 7.589.

• 0.150 M H3A
• 0.200 M NaH2A
• 0.100 M K2HA
• 0.0500 M Na3A

1. 0.0500 mol of the weak base, B (pKb = 10.1734) is dissolved in the pH 4.50 buffer. Calculate the percent protonation of B in the buffer. (5 pts)

1. You find a piece of metal in an old chest in your attic . It looks like gold, but it could be a cheap metal made to look like gold. You remember from your science class that gold has a high density of close to 20 g/em, and that gold is much denser than most other metals. You decide to carry out an experiment to measure the density of the of metal that you foundthe mass of the metal is found to be 687 g and its volume is 54 cm'. Based on these measurements , is it likely that the metal you found is gold ?

Part B: The vehicle that was transporting the dynamite sticks in Part A has been struck by another vehicle. A small fire appears to be spreading from a tire on a vehicle at the scene of the accident. Identify the explosive material that could be involved, and describe the chemical interaction that could be occurring as a result of the collision between the two vehicles. What immediate action should the EHS and FS responders take to protect human health and the environment?

Part A: You are the Environmental Coordinator for a demolition company that still prefers the use of dynamite sticks for demolition. You are tasked with the compliant and safe transport of dynamite to the demolition sites. Identify the proper placarding, labeling, and shipping documentation of the transport vehicle as required by the DOT. 

What is the volume of 0.6 moles of hydrogen gas?