A student placed 3 grams of one reactant in a beaker and added 4 grams of another reactant A chemical reaction took place in the uncovered beaker When the student weighed the beaker after the reaction, she found the contents of the beaker weighed 5 grams Which of the following is the best possible explanation for her results?

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

yes the answer is total mass in unchanged   : )