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Which isopropyl alcohol is most effective at killing microbes? 

Combustion analysis of 25.0 g of cumene (C9H12) determined that the sample contained 2.52 g of hydrogen. What is the percent by mass of carbon present in cumene?

Combustion analysis of 25.0 g of octane (C8H18) determined that the sample contained 3.97 g of hydrogen. What is the percent by mass of carbon present in octane?

How much energy is required to raise the temperature of 40.9 g of copper by 38.1oC? The specific heat capacity of copper is 0.385 J/g°C.

An unknown compound has the following mass percent composition: 63.15% carbon, 5.30% hydrogen and 31.55% oxygen. What is the empirical formula of the compound.

Consider the reaction: 2Al(s)  +  6HCl(aq) → 2AlCl3(aq) + 3H2(g) If a sample of 4.0 moles of Al is added to a solution containing 2.0 moles of HCl, how many moles of H2 are formed?

What distinguishes a process delay from a lot delay in Shingo’s process elements?

How much energy is required to raise the temperature of 40.9 g of cobalt by 38.1oC? The specific heat capacity of cobalt is 0.46 J/g°C.

How does the Plan-Do-Check-Act cycle relate to value stream mapping?

Complete the following reaction Ca(NO3)2(aq) + Na3PO4(aq)  →   a) by writing balanced total equation. b) by writing balanced ionic equation. c) by writing balanced net-ionic equation.