Answer:
Your question seems to me imprecise or poorly written, but compared to what is written I can clarify the following:
In our body we have a blood pressure regulating system through blood volume (which retains less or more fluid to increase or decrease blood volume and consequently blood pressure). This system is called renin-angiotensin-aldosterone what which participates the kidney, lung and capillaries with its own barometric receptors, is an incredible system within the body, which by increasing aldosterone promotes a retention of fluid at the level of the renal glomerulus (kidney) to maintain the blood pressure of the vessels and thus increase it.
Explanation:
It may happen to Mary that this system is activated in a menstrual situation since it may be that she loses too much liquid or blood volume through her menstruation and the body seeks to reward it along with other iron mechanisms for the transitory anemias that menstruation generates (that is this reason that it is not recommended to do blood tests in menstrual stages)
Answer:
41.43 mL
Explanation:
First we <u>calculate the mass of NaOH in the original solution</u>:
- 25.0 % m/v means that in 100 mL of solution, there are 25 grams of NaOH.
- This means that in 5.80 mL, we would have (5.80 * 25/100) <u>1.45 grams of NaOH.</u>
Then we <u>calculate the volume of the diluted solution</u>, using the grams of NaOH (that remain the same throughout the dilution process):
- 1.45 g NaOH * = 41.43 mL
<span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
2 mol 2 mol
M(NaBr)= 102 g/mol
M(NaNO3) = 85 g/mol
1) 244g NaNO3 *1 mol NaNO3/85 g NaNO3 = 244/85 mol NaNO3
2)</span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
2 mol 2 mol<span>
x mol </span>244/85 mol
<span>
x=(2 mol*</span> 244/85 mol )/2 mol = 244/85 mol NaBr
<span>
3) </span> 244/85 mol NaBr*102g NaBr/1 mol = (244*102/85) g NaBr =292.8 g NaBr<span>
</span>
The elements on the periodic table are listed in increasing atomic number.
Hydrogen is the first element, and has an A.N. of 1. Also, its very interesting how it doesn't need 8 valence electrons to be stable.
The second element is Helium, which has an A.N (atomic number) of two.