What is the valence electron configuration of the group 2a elements?

The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate the mass (in kg) of carbon dioxide that is added to the atmosphere per 1.0 kg of octane burned.

It takes 4.37 J of heat to raise the temperature of Object A by 1°C, and 2.88 J to raise the temperature of Object B by 1°C. Suppose A and B are brought into contact. A is initially hotter. A is seen to cool down by 6.3°C.

An 85 kg construction worker has 37 485 J of gravitational potential energy. To the nearest whole number, the worker is___ m above the ground

Give at least two results of too little air being in a running engine.

Why is stainless steel used instead of pure iron for the ball of the pen

Draw the structural formula of an alkane that has eight carbon atoms and only primary hydrogen atoms.

A 5.0 gallon container contains 15.0 moles of propane gas at room temperature (20. °c). what is the pressure of the gas? (1.0 gal = 3.79 l)

Radioisotopes tell scientists that Earth is how old? A. 65 million years B. 500 million years C. 4.5 billion years D. 13.4 billion years

When bismuth-212 undergoes alpha decay, it becomes which of the following? asatine-208 + an alpha particle lead-210 + an alpha particle polonium-210 + and alpha particle thallium-208 + and alpha particle

Why do we not currently use more renewable energy in the U. S.