A placebo is a substance that is unlikely to affect the dependent variable.

a. True

b. False

3 ways chemistry affects your everyday life

Problem page ammonia nh3 chemically reacts with oxygen gas o2 to produce nitric oxide no and water h2o. what mass of oxygen gas is consumed by the reaction of 6.3g of ammonia?

A student constructs a coffee cup calorimeter and places 50.0 mL of water into it. After a brief period of stabilization, the temperature of the water in the calorimeter is determined to be 22.6 °C. To this is added 50.

Write a scientific report on the clouds seeding using condensation nuclei and showing its relationship to saturated solutions.

A solution consists of 44.5 g of silver nitrate, AgNO₃, and 106.5 g water. Calculate the weight percent, the molality, and the mole fraction of AgNO₃in the solution.

What element is represented by the following electron configuration: 1s22s22p63s23p64s23d4 Question 2 options: Cr Ca Ge Ar

He substance, cocl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

The weighted average atomic mass of an element depends upon the a. relative abundance of protons in the element b. mass and relative abundance of each isotope of that element c. mass and relative abundance of each neutron of that element d.

What part of an atom do we change for isotopes

The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/L. Water suppliers must periodically test their water to ensure that mercury levels do not exceed 0.002 mg/L.