At what cold-reservoir temperature (in ∘C) would a Carnot engine with a hot-reservoir temperature of 420 ∘C have an efficiency of 60 %?

Write at least three characteristics of acids and three characteristics of bases. These characteristics should be what makes them different from one another.

A sample of gas is contained in a tube under a mercury plug. which tube represents the gas after the sample is cooled at constant pressure?

What explains why curry, a spice used in cooking, is this shade of orange? A. White light hits the spice, but only orange light is reflected to the eye. Only orange light is absorbed by the curry when it is in the presence of white light.

Generally speaking, elements with high electronegativities are 1. nonmetals. 2. likely to form anions (except the noble gases). 3. All of these 4. easily reduced (except the noble gases).

How many electrons were lost or gained to form the ion fe3+?

Which ionic compound is water soluble? A. cuS B. NH4NO3 C. SrSO4 D. ZnF

What is part of an experiment that is not being tested and is used for comparison

Is hydrogen sulfide a heterogeneous mixture solution compound or element?

Explain why people who like to stay cool on a hot summer day prefer to wear white clothing?

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.