why is it important to use the correct number of significant digits when reporting the results of an experiment

Can the excess reactant (in stoichiometry) be negative?

Balance the equation for the formation of ammonia from hydrogen gas and nitrogen gas using a set of the lowest possible integer coefficients. what is the coefficient in front of ammonia, nh3, in the balanced equation? n2 (g) + h2 (g) → nh3 (g)

What type of reaction is shown below? Check all that apply. AgNO3 (aq) + NaCl (aq) → NaNO3 (aq) + AgCl (s

When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?

A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 atm. What is the new temperature of the gas? a ... - 44.2°C b ... 32.6°C c ... 115°C d ... 388°C

Select the correct answer. In the graph, what effect would adding a catalyst have on D? A. It would decrease. B. It would increase. C. It would stay the same. D. You cannot tell from this graph.

Estimate the heat of neutralization of H3PO4 in kJ/mol given these dаta: Heat transferred = 2.5 x 102 J Moles of H3PO4 = 1.4 x 10-3 mol Moles of NaOH = 5.0 x 10-3 mol

Consider the elemts Ca, Ba, As, and Bi. Which has the ... largest radius? highest electronegativtity? Highest Ionization Energy?

How do guys Make sperm?

Maya's playroom is 12 m2. The length of the room is 3 m. What is the width? 4 m 8 m 15 m 36 m