Answer:
The last option.
Explanation:
You can immediately eliminate the other options as an organism is clearly the least complex. Only one option begins w/ 'organism'.
Answer:
40 g/mol, Argon
Explanation:
We can find the number of moles of the gas by using the equation of state for an ideal gas:
![pV=nRT](https://tex.z-dn.net/?f=pV%3DnRT)
where
is the pressure of the gas at STP
is the volume of the gas
n is the number of moles
is the gas constant
is the absolute temperature of the gas at STP
Solving for n, we find:
![n=\frac{pV}{RT}=\frac{(101,300)(2.96\cdot 10^{-3})}{(8.314)(273)}=0.132 mol](https://tex.z-dn.net/?f=n%3D%5Cfrac%7BpV%7D%7BRT%7D%3D%5Cfrac%7B%28101%2C300%29%282.96%5Ccdot%2010%5E%7B-3%7D%29%7D%7B%288.314%29%28273%29%7D%3D0.132%20mol)
Now we can find the molar mass of the gas, which is given by
![M_m=\frac{m}{n}](https://tex.z-dn.net/?f=M_m%3D%5Cfrac%7Bm%7D%7Bn%7D)
where
m = 5.28 g is the mass of the gas
n = 0.132 mol is the number of moles
Substituting,
![M_m=\frac{5.28}{0.132}=40 g/mol](https://tex.z-dn.net/?f=M_m%3D%5Cfrac%7B5.28%7D%7B0.132%7D%3D40%20g%2Fmol)
So, the gas in this problem is Argon, which has a molar mass of 40 g/mol.
You can know the metal with low reactivity and the metal with high reactivity from the periodic table, as in metals the Chemical reactivity increases by going down a group, because of the farther down group we go the easier of lose and gain of electrons or the easier the electrons to be given or taken, this caused the chemical reactivity be higher.
- and the chemical reactivity decreases as we go across the period because they want to give away valence electrons, they need more energy to get rid of them.
Answer:
HF is the Arrhenius acid and KOH is the Arrhenius base.
Explanation:
An Arrhenius acid dissociates in water to form H+ ions in solution.
An Arrhenius base dissociates in water to form OH- ions in solution.
Write the equations by breaking the compounds into their elements
HF→ H⁺ + F⁻ HF produces H⁺ when added to water, so it is the acid.
KOH→ K⁺ + OH⁻ KOH produces OH⁻ when added to water, so it is the base.
<span>The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.</span>