5 significant figures
1. never count zeros in front of the decimal
2. always count non zeros and zeros in between of two non zeros.
3. count the trailing zeros if there is a decimal
for example:
300 has 1 significant figures
0.70005 has 5 significant figures
0.880 has 3 significant figures
Keep practice and you should master it
Hope this help
The chemical formula for an ionic compound is metal + nonmetal = ionic
Answer: A
Explanation:
Because I just answered it and it’s right. ( Forces between electron pairs push the atoms apart.
Most likely, exothermic processes are what cause the light that fireflies emit. because fuel and oxygen undergo a chemical process that produces carbon dioxide and water.
In thermochemistry, an exothermic process is one "for which the overall standard enthalpy change H is negative." Exothermic processes typically result in heat. A reaction for which the overall standard Gibbs energy change G is negative is what the term "reaction" according to the IUPAC means.
The exergonic response and the phrase are commonly mistaken. A very exothermic reaction will often accompany an exergonic reaction since "H" significantly contributes to "G." The majority of the remarkable chemical reactions presented in classrooms are exothermic and exergonic processes.
On the other hand, an endothermic reaction typically produces heat and is brought on by a rise in the entropy of the system.
Learn more about fireflies:
brainly.com/question/29336431
#SPJ4