Question 9

10 pts

How many calories are released as 50.0 g of water cools from 100.0 °C to 25.0 °C?

750 cal

7500 cal

3750 cal

1250 cal

What problems can arise if plants and animals are transferred from their natural communities? Select all that apply. overpopulation disease wiping out habitats extinction by not mating unbalanced trophic levels

4. The density of a compound is 15.3 g/mL. What is the mass of 50 mL of the compound? a. 765g b. 0.306g c. 3.26g d. 765mL

Draw Bohr model of atom with atomic number 16 and name the element. What is the valency of the atom? What type of ion does it form and what will be the value of the charge on the ion produced? Justify the answer.

What is the equation for potassium chloride

What is one problem with using the potential energy in fossil fuels?

Name the following compound HClO

Aluminum and Oxygen gas will react to form Aluminum Oxide (Al2O3). When the equation is balanced, How many moles of Al2O3 are formed when a mixture of 0.36 moles Al is ignited? a. 0.12 b. 0.18 c. 0.28 d. 0.46

Which state of the West produces the widest varieties of fruits, vegetables, and nuts? A) California B) Colorado C) Wyoming D) Alaska

A chemical engineer for a fertilizer company is determining the most efficient way to produce ammonia. the engineer carries out the haber reaction under four different conditions.

What type of Bond exist in a molecule of hydrogen Iodide