Find the name for this compoud, (NH4)2S, which is used in analysis for trace amounts of metals present in a sample.   

Find the distance in m, if the the average distance from Earth to the Sun is 150 megameters. 

Simplify the following expression by combining the like terms.15.2289x+98.353x−61.33x

Compute the difference indicated and simplify your answer.6−1011

Change the following mixed number to an improper fraction. Reduce if possible.17⁤17

In the ionic compound with the general formula of M2X3, what would the likely charge on M be?

Change the following fraction to a percent. Write your answer in percent form.38

Compute the sum indicated and simplify your answer.34+1213+1324

Find the quotient and write your answer in mixed number form. Reduce if possible.(−1⁤112)÷(2⁤89)

Find the unknown quantity in the following percent problem using the formula R⋅B=A. Round your answer to two decimal places, if necessary.What is 149% of 610?