The mass number = protons + neutrons. Bromine has a mass number of 80<span> and 35 protons so </span>80<span>-35 = </span>45<span> neutrons. b) How many electrons does the neutral atom of bromine have? The neutral atom of bromine has 35 electrons because the number of electrons equals the number of protons.</span>
Answer:
d. None of the above
Explanation:
Desalination is the process of removing some mineral salts from water or soil thereby making a water more fresh and the soil less filled with mineral salts. Salty water can be desalinated by doing away with their salts leaving behind a water that would be more suitable for certain needs. Desalinated water can be used domestically, industrially and also for agriculture.
Soils that have been desalinized can be more suitable to plant some special types of crops that would not thrive where some certain mineral salts occur in excess.
Desalination is an expensive process.
Water reclamation is the reuse of waste to serve new needs. It involves recycling of waste or polluted water into a more fresher water. Reclaimed water can also be used for agricultural, domestic and industrial purposes.
Desalination is a method that can be used to reclaim water. It is also an expensive process.
Desalination recharges aquifers: Desalination is an artifical process and would not add back to the ground water storage.
Desalination provides water suitable for drinking: water reclamation also provides suitable water for drinking.
<span>The best choice is hypochlorous acid nitrous acid (HNO2) because it has the nearest value of pK to the desired pH.
pKa of </span>nitrous acid<span> is 3.34
If we know pKa and pH values, we can calculate the required ratio of conjugate base (NO2⁻) to acid (HNO2) from the following equation:
pH=pKa + log(conc. of base)/( conc. of acid)
</span><span>3.19=3.34 + log c(NO2⁻)/c(HNO2)
</span><span>3.19 - 3.34 = log c(NO2⁻)/c(HNO2)
-0.15 = log c(NO2⁻)/c(HNO2)
c(NO2⁻)/c(HNO2) = 10⁰¹⁵ = 1.41
</span>
Answer:
I will need six (6) bags of potting soil
Explanation:
Since you plan on planting in 10 pots and need 15 cups of potting soil per pot, the total amount of potting soil you need <em>(in cups)</em> is 10 X 15 = 150 cups of potting soil.
We have that a bag contains 25 sups. to get the number of bags needed, we have to divide 150 by 25. This will give us 150 / 25 = 6 bags.
Therefore, I will need six (6) bags of potting soil
<span>The correct answer is ideal gas law.
when the ideal gas law formula is:
PV = nRT ,
when P is the pressure.
V is the volume.
and R is the ideal gas constant.
T is the temperature.
and n is the number of moles.
So, this is the law which relates pressure, temperature, volume and number of moles . and this law state that 1 mole of an ideal gas will occupy a volume V = 22.4 L</span>
