Which is true about the total mechanical energy in a closed system?

O

A. It is not conserved.

O

B. It is zero.

O

c. It does not change.

O

D. It is always decreasing.

Select the correct answer. Which statement best explains acceleration SU A. It is the total distance covered over a period of time. B. It is a change in velocity over a period of time. C. It is a change in displacement over a period of D.

A sample of trifluoroacetic acid, C2HF3O2, contains 38.9 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

As a part o a clinical study, a pharmacist is asked to prepare a modi ication o a standard 22 g package o a 2% mupirocin ointment by adding the needed quantity o mupirocin powder to prepare a 3% w/w mupirocin ointment.

Which is an endothermic process? the process in which a substance loses heat energy the process in which a substance loses kinetic energy the process in which the molecular motion of a substance decreases the process in which a substance gains

Table salt, NaCl Give only the names of the elements alphabetically, separating them with commas.

A student mixes 0.50 L of 0.0020 M Ba (NO3) 2 solution with 0.50 L of 0.0080 M Na2SO4 solution. Which equation shows the proper set-up to calculate molar concentration of Ba2 + ions in the new solution? (0.0020 M) (1 L) = (? M) (0.0020 M) (0.

What is the minimum number of carbon atoms a ketone may contain

The gas-phase decomposition of NOBr has a k = 0.810 M-1 s-1 at 10°C. NOBr (g) → NO (g) + ½ Br2 (g) rate = k[NOBr]2 We start with 0.00200 M NOBr in a flask at 10°C. (a) How many minutes does it take to use up 0.

What new scientific evidence led to changes in Dalton's atomic theory?

What other property do metal share