Ammonia (NH3 (g), Hf = - 45.9 kJ/mol) reacts with oxygen to produce nitrogen and water (H2 O (g), Hf = - 241.8 kJ/mol) according to the equation below. What is the enthalpy of the reaction?

1) - 3,572.1 kJ

2) - 1,267.2 kJ

3) 1,267.2 kJ

4) 3,572.1 kJ

Why should you cover the container during chromatography?

The formula of the compound formed in the reaction between aluminum and sulfur is

Sucralfate (molecular weight: 2087 g/mol) is a major component of Carafate®, which is prescribed for the treatment of gastrointestinal ulcers. The recommended dose for a duodenal ulcer is 1.0g taken orally in 10.

What happens when you break earphones into smaller pieces

Which of the following elements is released into the atmosphere by all of these processes: volcanic outgassing, animal respiration and flatulence, burning of fossil fuels, and metamorphism of limestone? a. Carbon. b. Nitrogen. c. Oxygen. d. Sulfur

Molar mass of 34.00 g/mol molecular formula

In CO which element holds electron more tightly

Copper is composed of two naturally occurring isotopes: Cu-63 (69.170%) and Cu-65. The ratio of the masses of the two isotopes is 1.0318. What is the mass of Cu-63?

The measurement describes the area of solid object a. 25mm b. 23c c. 25cm2 d. 25cm3

The face-centered gold crystal has an edge length of 407 pm. based on the unit cell, calculate the density of gold.