What is the percent composition of hydrogen in a compound if the mass of the initial compound is 276 grams and the mass of collected hydrogen after decomposition is 41.4 grams?

A.

6.6%

B.

10.0%

C.

15.0%

D.

21.2%

To what volume should you dilute 70 mL of a 11.5 M H2SO4 solution to obtain a 1.80 M H2SO4 solution? Express your answer using two significant figures.

Suppose you want to create a 6 ng/μL solution in a 25 mL volumetric flask. However, this concentration cannot really be accurately prepared in a single step due to the small amount of mass that would need to be measured.

A main group metal was studied and found to exhibit the following properties: a. It does not occur free in nature. b. It loses valence electrons readily. c. It reacts readily with the halogens, oxygen, and nitrogen. d.

When a chemical reaction occurs, O a phase change takes place o the physical and chemical properties of the products are different from the reactants O the physical and chemical properties of the reactants are the same as the properties of the

How is electronegativity used to determine bond polarity

When magma intrudes parallel to another rock layer, the formation is called a (n) A. sill. B. dike. C. extrusion. D. unconformity.

What is the net amount of energy released when 1 mole of H2O is produced

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.