Answer:
See below.
Explanation:
Argon gas is a pure substance. It has nothing other than molecules of Argon gas.
Iron oxide is a compound with iron and oxygen as its components. It is a pure substance.
<u>Answer:</u> The concentration of
comes out to be 0.16 M.
<u>Explanation:</u>
To calculate the concentration of acid, we use the equation given by neutralization reaction:
![n_1M_1V_1=n_2M_2V_2](https://tex.z-dn.net/?f=n_1M_1V_1%3Dn_2M_2V_2)
where,
are the n-factor, molarity and volume of acid which is ![CH_3COOH](https://tex.z-dn.net/?f=CH_3COOH)
are the n-factor, molarity and volume of base which is NaOH.
We are given:
![n_1=1\\M_1=?M\\V_1=25mL\\n_2=1\\M_2=0.175M\\V_2=26.6mL](https://tex.z-dn.net/?f=n_1%3D1%5C%5CM_1%3D%3FM%5C%5CV_1%3D25mL%5C%5Cn_2%3D1%5C%5CM_2%3D0.175M%5C%5CV_2%3D26.6mL)
Putting values in above equation, we get:
![1\times M_1\times 25=1\times 0.175\times 26.6\\\\M_1=0.1862M](https://tex.z-dn.net/?f=1%5Ctimes%20M_1%5Ctimes%2025%3D1%5Ctimes%200.175%5Ctimes%2026.6%5C%5C%5C%5CM_1%3D0.1862M)
Hence, the concentration of
comes out to be 0.1862 M.
We need an equation that will relate the concentrated mixture and the diluted one. To solve this we use the equation,
M1 V1 = M2 V2
where M1 is the concentration
of the stock solution, V1 is the volume of the stock solution, M2 is the
concentration of the new solution and V2 is its volume.
M1V1 = M2V2
30 % x 6 oz = 20 % x V2
V2 = 9 oz
The volume of the diluted mixture would be 9 oz. Therefore, you will need to add 9 oz - 6 oz = 3 oz of fruit juice to dilute the 30 percent alcohol to 20 percent alcohol.
Explanation:
First, you need to be sure the elemental analysis has identified all the components.
83.7+16.3=100% so we’re good, and the same ratio works for the formula,
The formula is CxHy, so x*12+y*1= 100% of the empirical formula wt, which we’ll use later to confirm the elemental analysis. We need x and y
Then x = 83.7/12 is 6.975 and being savvy, we guess it’s supposed to be 7, since empirical formulas use whole numbers if they can. Likewise y=16.3/1 = 16.3, and now we round down to the nearest whole number (16), making our empirical formula C7H16
Check:
7*12+16*1=100 (the empirical formula wt) 84/100=0.84 and 16/100=0.16 This is close enough, so C7H16 is the empirical formula.
Solids more dense in comparison.