What is a neutron and what charge does it have

What is a destructive force caused by the convection in the mantle

In 2007, an estimated amount of 31 billion tons of carbon dioxide was emitted worldwide due to fossil fuel combustion and cement production.

Which of the following is not equal to 120 centimeters? A) 0.0012 kilometers (km) B) 0.012 dekameters (dkm) C) 1.2 meters (m) D) 1200 millimeters (mm)

What elements are formed by stars having a mass greater than eight suns?

What is the name for the chemical formula K3PO4, and is it ionic or covalent?

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?

A 126-gram sample of titanium metal is heated from 20.0°C to 45.4°C while absorbing 1.68 kJ of heat. What is the specific heat of titanium?