Give me number of significant figures in the number 40

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

What is the salt produced when sodium hydroxide (NaOH) reacts with sulfuric acid (H2SO4) ?

Determine the calcium carbonate equivalent (CCE) of the following compounds: (amount that has the same neutralizing value as 100 g pure CaCO3) (a) MgO (b) Mg (OH) 2 (c) and CaMg (CO3) 2.

How many grams of calcium chloride will be produced when 29.0 g of calcium carbonate is combined with 13.0 g of hydrochloric acid?

Insulation products are used to __ energy loss. enlarged decrease increase protect

A student needs to use 0.575 moles of sodium chloride in an experiment. How many grams should he mass out?

Which of the following seperation methods is used to seperate plant pigments? Filtration, Chromatography, fractional distillation, simple distillation?

If a fast moving car making a loud noise approaches and moves past the person what will happen as the distance between the two increases?

Which of the following would be an example of a trophic relationship? Select all that apply. photosynthetic plankton respiring oxygen into the ocean small marine life feeding on the algae and plankton that have descended to the ocean floor a

Fumaric acid is an organic compound composed of 41.39%, 3.47%, and the rest oxygen. If 0.288 mol of fumaric acid has a mass of 33.4 g, what are the empirical and molecular fomulas of fumaric acid