Chemistry Questions
Explore questions in the Chemistry category that you can ask Spark.E!
Many mammals control their body temperature by sweating. Which property of water is most directly responsible for the ability of sweat to lower body temperature?
A given neurotransmitter might be excitatory at one synapse and inhibitory at another synapse. (true/false)
Water molecules have __________ than molecules of similar size, such as ammonia and methane, reflecting its capacity to absorb large amounts of heat.
The amount of heat required to convert 1 g of any substance from the liquid to the gaseous state is defined as __________.
The amount of heat required to change the temperature of 1 g of any substance by one °C is defined as __________.
The absorption of human-generated CO2 by the oceans __________.-reduces the carbonate ion concentration in the oceans and threatens calcifying organisms in marine ecosystems-increases the hydrogen ion concentration in the oceans but decreases the carbonate ion concentration and threatens the livability of the oceans for calcifying organisms-increases the oceanic concentration of carbonic acid-increases the oceans' acidity and lowers pH-all answers are correct
The phenomenon responsible for maintaining the upward movement of water through a vessel is __________
When ice forms, the __________ are farther apart than in liquid water, allowing the ice to form an organized crystal structure and float.
Given that release of an inhibitory neurotransmitter is altered by presynaptic facilitation, the response in the postsynaptic cell will be a (larger/smaller) degree of hyperpolarization.
A mole of methanol (CH3OH) weighs 32 g. The number of grams of methanol that are needed to produce 1 L of a 1 millimolar solution is __________.
Urine, at pH 6, contains __________ H+ as household bleach, at pH 13.
Water moves up a plant because of hydrogen bonds by a process called __________.
Sweating has a cooling effect because of water's high __________.
You can fill a glass of water to just slightly above the rim without it spilling over the glass. What property of water best explains this phenomenon?
Adenylate cyclase catalyzes the formation of______.
Nonpolar molecules that cluster away from water molecules are called __________ molecules.
Neurotransmitter receptors are found at (chemical/electrical) synapses.
The response to a neurotransmitteris faster at (ionotropic/metabotropic)receptors.
Whether a synapse is excitatory or inhibitory is determined by the mechanism of coupling between the neurotransmitter receptor and ion channels in the postsynaptic cell. (true/false)
When the pH of a solution shifts from 3 to 7, the hydrogen ion concentration has changed, and __________.