What is the type of stimulus is an allergen such as pollen

A.) response to a stimulus

B.) external stimulus

C.) internal stimulus

D.) inborn stimulus

Which is a characteristic of a decomposition reaction? 1. Substance P replaces X in the compound XY. 2. Substance XYZ breaks down into X, Y, and Z. 3. Substance Z burns in the presence of oxygen to form ZO. 4.

Besides temperature and precipitation, which other factor does the Köppen climate classification system use to define climate regions? altitude hemisphere solar energy vegetation?

Hydrocyanic acid (HCN) is a strong acid. In a water solution of this acid, which of the following would you expect to find more of

Standard pressure is 101.3 KPa, which is equal to 760. o mmHg. If gas has a pressure of 545 mmHg, what is its pressure in KPa to the proper number of significant figures?

What is the empirical formula of ascorbic acid, given that the pseudoformula is C3.407 H4.53 O3.406?

A certain ore is 34.4% nickel by mass. How many kilograms of this ore would need to dig up to have 30.0g of nickel?

Are the chemical reactions that take place when a battery connected endothermic or exothermic

What are 3 properties of carbon?

A (1. pathogen 2. Germ 3. Bacterium) is an agent that causes disease. All (1. bacteria 2. fungi 3. Viruses) are pathogens.

Calculate the solubility (in g/l) of calcium fluoride in water at 25°c if the ksp for caf2 is 1.5 * 10-10.