Density of a piece of wood with a volume of 2.5L and a mass of 12.5 kg

1. Which of these show a diatomic element? CO H₂ He SO₂ 2. Which of these substances is an element? Chlorine Ice Methane Sodium chloride 3. When the elements lead and bromine combine together, the name of the substance formed is called ...

The wind pushes a paper cup along the sand at a beach. the cup has a mass of 0.025kg and accelerates at a rate of 5m/s2 how much force is the wind exerting on the cup

What mass of pcl5 will be produced from the given masses of both reactants? 27 60?

Why was Niels Bohr's atomic model superior to all the earlier models?

What is the common name of the reaction between o2 and the dianion of luminol?

In a lab, a student dissolves 6.9 g of sodium chloride (NaCl) in 125 g of water (H2O). What is the molality concentration of the solution?

Audrey is driving 50 miles in 2 hours what is her average speed?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affect the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected?

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?