Answer: I think the answer is 3.) Krypton or Argon.
Explanation:
No, because 40 miles is the same as nearly 25 km/h.
125 Each half life it divides by 2 the amount
1000/2=500
500/2=250
250/2=125
Answer: well i guess we can say that is a scale used to specify the acidity or basicity of an aqueous solution and it is important to keep ph of hot tub water between 7 and 7.6 because if it is not balanced the water can negatively affect your tub.
Explanation:
pH is an extremely important chemical level to maintain in your spa's water chemistry. A high pH or a low pH will spell trouble for you and your spa. On the pH scale, a reading of 7.4-7.6 indicates perfectly balanced pH. Any number lower than 7.4 means that your water is now considered “acidic”.
Answer:
25
Explanation:
mass number = protons + neutrons
= 13 + 12 = 25
