What elements form ions with a charge of - 1?

If 4520 kJ of heat is needed to boil a sample of water, what is the mass of the sample of water (ΔHvaporiztion = 2260kJ/kg) ?

Calculate the mass of solid CuSO4∙5H2O (±0.1 g) needed to prepare 25.00 mL of 0.10 M Cu2 + solution. When calculating the molar mass, include the full formula of the CuSO4∙5H2O (s) - its formula is called "copper (II) sulfate pentahydrate" and

The measure of central angle MNL is π radians, and the measure of the entire circle is 2π radians. The ratio of the measure of the central angle to the entire circle measure is. The area of the entire circle is π units2.

The gravitational Strength on earth is less than the gravitational strength on Neptune. Which statement is correct?

A Cadillac Escalade has a mass of 2 569.6 kg, if it accelerates at 4.65m/s2 what is the net force on the car?

What is the difference between a 1s orbital and a 2s orbital is that

Why should distilled water be used when conducting chemical tests? Select all that apply. O Distillation removes most chemicals present in tap water that could give us false results.

2. How can you use mass and volume to find density of a substance?

Grayson wants to build an inexpensive shelter at his bus stop that he can stand in when it rains. What material would be best for building a shelter that is both strong and waterproof

A sample of gas has a volume of 0.600 L at a temperature of 303 k. If the volume is increased to 0.900 L, what is the new temperature?