What is the number of significant figures in 0.2679028

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

Write a one page letter to your lil cousin explaining how small an atom is

How many grams are in 0.25 mol KNO3? The molar mass of KNO3 is 101 g/mol.

A 0.2000 g sample of a compound (vitamin C) composed of only C, H, and O is burned completely with excess O2. 0.2998 g of CO2 and 0.0819 g of H2O are produced. What is the empirical formula?

A block made of a certain material has a thickness of 20 cm and a thermal conductivity of 0.04 m C. At a particular instant in time the temperature distribution with x, the distance from the left surface of the block, is T =

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false