Prescribed to you by your doctor.
I would use an over the counter antacids for occasional heart burn. If there are symptoms of acid reflux I would suggest a histamine blocker, or H2-Blockers, such as Ranitidine (Zantac) and Famotidine (Pepcid)
I believe the correct answers from the choices listed above are the first two options. The molecules O2- and F2+ are <span>expected to have one unpaired electron. This can be determined by looking at the value of the charge. Hope this answers the question.</span>
Answer:
643g of methane will there be in the room
Explanation:
To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -<em>Assuming STP-</em>. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:
<em>Volume Methane:</em>
3600s * (0.25L / s) = 900L Methane
<em>Moles methane:</em>
PV = nRT; PV / RT = n
<em>Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP</em>
Replacing:
PV / RT = n
1atm*900L / 0.082atmL/molK*273.15 = n
n = 40.18mol methane
<em>Mass methane:</em>
40.18 moles * (16g/mol) =
<h3>643g of methane will there be in the room</h3>
<span><u><em>First, we should define what a mixture and a two-phase mixture mean.</em></u>
<u><em>A mixture</em></u> is a combination of two or more substances without any chemical reaction occurring between them. Components of a mixture can be separated using physical methods such as heating, filtering, evaporation, .... etc
<em><u>A two-phase mixture</u></em> is a type of mixture that contains two different phases of matter, for example solid and liquid phases in one mixture or liquid and gas phases in one mixture.
<u><em>Now, we can give examples of two-phase mixtures and mention how to separate them:</em></u>
<u><em>A mixture of sand and water</em></u> is considered a two-phase mixture (sand is sold and water is a liquid).
<u><em>The components can easily be separated</em></u> using filtration where the sand will remain on the filter paper and water will pass.
Another example is <u><em>a mixture of sugar and water</em></u> (sugar is a solid and water is a liquid).
<u><em>The components can be separated </em></u>by heating. We can eat the mixture until water evaporates and the sugar is precipitated. The evaporated water can then be condensed into a different container.
Hope this helps :)</span>
Answer:
pKa = 4.89.
Explanation:
We can solve this problem by using the <em>Henderson-Hasselbach equation</em>, which states:
pH = pKa + log
In this case [A⁻] is the concentration of sodium benzoate and [HA] is the concentration of benzoic acid.
We <u>input the given data</u>:
4.63 = pKa + log
And <u>solve for pKa</u>:
pKa = 4.89