Answer:
A: COAL
Explanation:
Coal was created hundreds of millions years ago. When prehistoric plant life died and sank to the bottom of the swamp and was covered by layers of sediment.
Answer:
Erythrocytes
Explanation:
Water passes through the Bowman's capsule into the glomerular filtrate and so do salts, glucose, urea, amino acids, and a majority of smaller proteins (molecular weight < 68,000). Erythrocytes or other blood cells do not enter the glomerular filtrate.
Answer:
V₂ = 50.93 L
Explanation:
Initial volume, ![V_1=43.1\ L](https://tex.z-dn.net/?f=V_1%3D43.1%5C%20L)
Initial temperature, ![T_1=24^{\circ} C=24+273=297\ K](https://tex.z-dn.net/?f=T_1%3D24%5E%7B%5Ccirc%7D%20C%3D24%2B273%3D297%5C%20K)
Final temperature, ![T_2=78^{\circ} C=78+273=351\ K](https://tex.z-dn.net/?f=T_2%3D78%5E%7B%5Ccirc%7D%20C%3D78%2B273%3D351%5C%20K)
We need to find the final volume of the gas. The relation between the volume and the temperature is given by :
![\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{43.1\times 351}{297}\\\\V_2=50.93\ L](https://tex.z-dn.net/?f=%5Cdfrac%7BV_1%7D%7BT_1%7D%3D%5Cdfrac%7BV_2%7D%7BT_2%7D%5C%5C%5C%5CV_2%3D%5Cdfrac%7BV_1T_2%7D%7BT_1%7D%5C%5C%5C%5CV_2%3D%5Cdfrac%7B43.1%5Ctimes%20351%7D%7B297%7D%5C%5C%5C%5CV_2%3D50.93%5C%20L)
So, the final volume of the gas is 50.93 L.
Answer:
0.745 and 0.245
Explanation:
Mole fraction (χ) is the number of moles of a component divided by the total number of moles in a mixture.
We must calculate the moles of each component.
Let CO₂ be Gas 1 and SO₂ be Gas 2.
1. Calculate the moles of each gas.
![\text{n} _{1} = \text{8.65 g} \times \dfrac{\text{1 mol}}{\text{44.01 g}} = \text{0.1965 mol}\\\\\text{n} _{2} = \text{4.32 g} \times \dfrac{\text{1 mol}}{\text{64.06 g}} = \text{0.067 44 mol}](https://tex.z-dn.net/?f=%5Ctext%7Bn%7D%20_%7B1%7D%20%3D%20%5Ctext%7B8.65%20g%7D%20%5Ctimes%20%5Cdfrac%7B%5Ctext%7B1%20mol%7D%7D%7B%5Ctext%7B44.01%20g%7D%7D%20%3D%20%5Ctext%7B0.1965%20mol%7D%5C%5C%5C%5C%5Ctext%7Bn%7D%20_%7B2%7D%20%3D%20%5Ctext%7B4.32%20g%7D%20%5Ctimes%20%5Cdfrac%7B%5Ctext%7B1%20mol%7D%7D%7B%5Ctext%7B64.06%20g%7D%7D%20%3D%20%5Ctext%7B0.067%2044%20mol%7D)
2. Calculate the total moles.
![n_{\text{tot}} = \text{n}_{1} + \text{n}_{2} = \text{0.1965 mol} +\text{0.067 44 mol} = \text{0.2640 mol}](https://tex.z-dn.net/?f=n_%7B%5Ctext%7Btot%7D%7D%20%3D%20%5Ctext%7Bn%7D_%7B1%7D%20%2B%20%5Ctext%7Bn%7D_%7B2%7D%20%3D%20%5Ctext%7B0.1965%20mol%7D%20%2B%5Ctext%7B0.067%2044%20mol%7D%20%3D%20%5Ctext%7B0.2640%20mol%7D)
3. Calculate the mole fraction of each component
![\chi_{1} =\dfrac{0.1965}{0.2640} = \mathbf{0.745}\\\\\chi_{2} =\dfrac{0.06744}{0.2640} = \mathbf{0.255}](https://tex.z-dn.net/?f=%5Cchi_%7B1%7D%20%3D%5Cdfrac%7B0.1965%7D%7B0.2640%7D%20%3D%20%5Cmathbf%7B0.745%7D%5C%5C%5C%5C%5Cchi_%7B2%7D%20%3D%5Cdfrac%7B0.06744%7D%7B0.2640%7D%20%3D%20%5Cmathbf%7B0.255%7D)
Answer: Sulfur dioxide is he gas formed in the chemical reaction below.
Explanation: The reaction between Acetic acid and Lithium hydrogen sulfite produces water, sulfur dioxide and lithium acetate. The balanced Chemical reaction is:
![HC_2H_3O_2(aq.)+LiHSO_3(aq.)\rightarrow H_2O(l)+SO_2(g)+LiC_2H_3O_2(aq.)](https://tex.z-dn.net/?f=HC_2H_3O_2%28aq.%29%2BLiHSO_3%28aq.%29%5Crightarrow%20H_2O%28l%29%2BSO_2%28g%29%2BLiC_2H_3O_2%28aq.%29)
The gas produced is sulfur dioxide when this reaction takes place.