In what kind of reaction do two or more substances combine to form a new compound?

a. decomposition reaction

c. double-displacement reaction

b. ionic reaction

d. synthesis reaction

Why are elements put in a particular group?

Do birds with longer or shorter wings fly faster? Write a hypothesis

What occurs during one half-life? A. Half of a daughter isotope undergoes radioactive decay to form a parent isotope. B. Half of a parent isotope undergoes radioactive decay to form a daughter isotope. C.

A hydrate of CoCl2 with a mass of 6.00 is heated strongly, after cooling the mass of the anhydrate is 3.27g. how many grams of H2O were lost from the hydrate

Is it harder to stop a large truck that a small car when both are moving at the same velocity? Why or why not?

Gypsum is hydrated calcium sulfate. a 4.89 g sample of this hydrate was heated. after the water was removed, 3.87 g anhydrous calcium sulfate remained. determine the formula of this hydrate and name the compound.

A chemical reaction produces CO2 (g). If 44 g is produced at 1.0 atm and 25°C, what volume will the gas occupy? (Assume that CO2 behaves as an ideal gas under these conditions.

What is the smallest carbohydrate called?

One of the characteristics of living things is that they respond to external changes in their environment so that their internal environment stays as stable as possible. why must an organism do this

A 21.0 kg child is running at a velocity of 2.50 m/s. The child is carrying a 2.25 kg gallon of milk. What is the momentum of the child and the milk together?