Which of these measurements is expressed as three significant figures?

A. 0.0070 cm

B. 883.2 km

C. 4.20 g

D. 990, 000 mL

a 25.0mL sample of ammonium nitrate solution produces a 0.186 M solution when diluted with 50.0mL of water. what is the molarity of the stock solution

If dynamite explodes what type of chemical reaction is it?

To begin the experiment, 1.5g of methane CH4 is burned in a bomb calorimeter containing 1,000 grams of water. The initial temperature of water is 25°C. The specific heat of water is 4.184 J/g°C. The heat capacity of the calorimeter is 695 J/°C.

What is the oxidation number of sulfur in BaSO4?

Why magnesium and potassium chloride will not react together

What is the distance from the highest part of one wave to the highest part of the next wave.

Calculate Delta E when 33.0 g of carbon dioxide sublimes at 77.0 K and 1 ATM

Calculate zeff for a valence electron in an oxygen atom.

Which of the following are physically properties of a penny

Complete the following statements about the functions of the digestive system. The starts an involuntary swallowing action when it senses food. The squeezes food down the digestive tract by an involuntary synchronized muscle movement called.