When a car is going downhill, the driver must apply more pressure on the brakes to stop than if the car were on level ground. why?

Find the number of moles of argon in 364 grams of argon. OA) 2.19 x 1026 OC) 14,500 mol Ar OB) 7.21 mol Ar OD) 9.11 mol Ar

Concentrated sulfuric acid contains very little water, only 5.0% by mass. it has a density of 1.84g/ml. what is the molarity of this acid

The reactant Kl is The reactant Pb (NO3) 2 is

Which element would float in water? 1) Sodium 2) Magnesium 3) Cesium 4) Radium

A rocket moves at the speed of 4.9 miles per second. Ben writes the following steps to calculate this speed in kilometers/hour (km/h). [1 mile = 1.6 kilometer] Step 1: Multiply 4.9 by 1.6. Step 2: Divide the result obtained in step 1 by 60.

Prepare a solution that is 0.1 M acetic acid and 0.1 M sodium acetate by measuring out 5.0 mL of the 1.0 M acetic acid solution and 5.0 mL of the 1.0 M sodium acetate solution in a 100 mL graduated cylinder, diluting the 10.

Which element has an ion that is smaller than an ion of calcium?

Which factor is responsible for the weak attraction between diatomic molecules of the halogens (group 7A) ? A) Hydrogen bonding B) Ionic bonding C) Dipole interactions D) London dispersion forces

Which is the correct equation for refractive index?

Alcl3) and lithium sulfate (li2so4) (note - this is a double replacement reaction. you need this information to predict the products of the reaction)