Blog

A scientist weighed three laboratory samples and recorded the data below. a) Calculate the total weight by adding the weights of the samples. b) Record the calculated value using standard notation.  Sample 1: 0.00261 gramsSample 2: 0.00362 gramsSample 3: 0.00080 grams

What are the properties that distinguish Metals on the Periodic Table from other types of elements?

Recall the Lab Safety assignment that you completed last week.  Which of these were listed as correct substitutions for Laboratory Shower in your chemistry lab area?

Define the term “transition.” How does this definition apply to the transition metals?

Convert 61° F to °C

Which characteristics of metalloids are more like metals based on the research you conducted and the information recorded in Data Table 1 in the Intro to the Periodic Table Lab?

Which is the correct way to handle this lab safety hazard: A container of flammable liquid has spilled and been left on the lab bench next to open flames.    

You have struck it rich and found a giant gold nugget in a stream while you were on vacation in Montana.  The volume of the gold idol is approximately 1.0 L. The density of gold is 19.3 g/mL and the density of sand is 2.3 g/mL. You want to determine if it is really pure gold. You weigh the nugget and measures the volume by a water displacement method. The results are:  mass = 16.5 kg and volume of water displaced = 954 mL. Is your gold made of pure gold? 

Use the Selected Option Quotations for Proctor & Gamble (P&G) when responding to this question. Suppose you bought the January X=65 Call contract on November 9. If you closed out your position by selling the same contract on November 29, your percentage rate of return on your initial investment would be closest to (ignore transactions costs):

Which of the following is not an advantage for a sole proprietorship?