A certain element forms an ion with 54 electrons and a charge of + 2. identify the element.

A Block has a volume of 0.09 m³ and a density of 4000 kg/m³. what's the force of gravity acting on the block in water

What are conventions? a. The events that lead to the climax of a novel b. The conflicts between the protagonist and the antagonist c. The traditions and rules that lead to a reader s expectations d.

Lithium iodide has a lattice energy of - 7.3*102kJ/mol and a heat of hydration of - 793kJ/mol. Find the heat of solution for lithium iodide. Determine how much heat is evolved or absorbed when 10.0g of lithium iodide completely dissolves in water.

How many protons and neutrons does nitrogen-14 have?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.

What are three conditions that can cause chemical reactions to occur?

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical

Select all of the characteristics that define matter. A.) Matter has mass. B.) Matter has volume (takes up space). C.) Atoms and compounds are made out of matter. D.) All matter has the same density.