Explanation:
We have to find the net charge of a polyatomic ion that contains 49 protons and 50 electrons.
n° of protons = 49 n° of electrons = 50
The charge of each electron is -1 and the charge of each proton is +1.
charge of electron = -1 charge of proton = +1
Finally the net charge will be:
Net charge = n° of electrons * charge of electron + n° of protons * charge of proton
Net charge = 50 * (-1) + 49 * (+1)
Net charge = -1
Answer: C) -1
Number 1 goes with obsolete
Number 2 goes with molecular structure
Number 3 goes with ion
Number 4 goes with isotope
Number 5 goes with residue
Number 6 goes with anthracite
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Number 12 goes with structure
The best answer is letter A.
The main factors that change the speed of enzymatic reactions are temperature, pH and substrate concentration (quantity). <span>There are enzymes that need other associated molecules to work. These molecules are called enzyme co-factors. They can be organic ions like mineral salts.</span>
Answer:
When all the reactants end up in the products - when no new atoms can be destroyed or created
Answer:
S = 1,75x10⁻⁴M
Explanation:
It is possible to answer this question using Henry's law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The formula is:
S = k×Pi
Where S is solubility, K is Henry's constant and Pi is partial pressure.
At sea level, Pi of O₂ is:
1atm×0,209 = 0,209 atm. Replacing:
2,67x10⁻⁴M = k×0,209atm
k = 1,28x10⁻³M/atm
At 12,000ft Pi of O₂ is:
0,657atm×0,209 = 0,137 atm. Replacing:
S = 1,28x10⁻³M/atm×0,137atm
<em>S = 1,75x10⁻⁴M</em>
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I hope it helps!