Answer:
i can only help with 2 :( atimic mass is: 35.453 and number of electrons is:17
Explanation:
Answer:
Explanation:
1. Select all the statements about the nucleus of the atom that are correct:
Group of answer choices
B. It contains Protons
D. It has a Positive Charge
E. It contains Neutrons
2. An atom of an element with atomic number 50 and mass number 120 contains:
Group of answer choices
B. 50 protons, 50 electrons, and 70 neutrons
3. Which of these statements is false?
Group of answer choices
D. Electrons have the same mass as a proton but have the opposite charge.
Answer:
Occluded Front
Explanation:
"Occluded Front Forms when a warm air mass gets caught between two cold air masses. The warm air mass rises as the cool air masses push and meet in the middle. The temperature drops as the warm air mass is occluded, or “cut off,” from the ground and pushed upward."
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www.eduplace.com › science › hmxs › pdf
The pH of a solution is a measure of the acidity of a solution and is logarithmically related to the hydrogen ion concentration. It is expressed as:
pH = -log [H+]
We use this to determine the amount of H+ needed to adjust the pH to the desired value.
pH1 = 7.2 = -log [H+]
[H+] = 6.31x10^-8
pH2 = 8.2 = -log [H+]
[H+] = 6.31x10^-9
[H+] to be added = 6.31x10^-8 - 6.31x10^-9 = 5.68x10^-8 M
She should add an acidic solution with concentration 5.68x10^-8 M. Hope this helps.
