The correct answer is option A.
The beaker absorbed energy that was released by the chemical reaction.
In an exothermic reaction heat energy is released by a chemical reaction. The reactants are converted into products with the release of energy.
The heat energy released by the chemical reaction was absorbed by the beaker. Hence the beaker feels warm to the touch.
Answer:
Global warming
Explanation:
Global warming occours when there is an increase in temprature, so before the temprature was colder now it is a bit hotter.
Answer:
All cells have these four parts in common: a plasma membrane, cytoplasm, ribosomes, and DNA
Explanation:
an i get brainliest plz
1) 20°c and 68°f. 2) 16°c and 61°f
Answer:
76
Explanation:
Alpha decay is one of the most basic forms of radioactive decay. It has an atomic mass of 4 and a proton number of two.
Undergoing an alpha decay will decrease the atomic mass by four and the atomic number by two.
In this particular question, we are particular about the atomic number. The atom has an atomic number of 78. So taking 2 off this gives 76
