mass of the gas = 10 g
<h3>Further explanation</h3>
<em>The law of conservation of mass :</em>
<em>In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.</em>
Reaction
![\tt X+Z\rightarrow gas+solution](https://tex.z-dn.net/?f=%5Ctt%20X%2BZ%5Crightarrow%20gas%2Bsolution)
mass before reaction=mass after reaction
![\tt 25+60=gas+75\\\\gas=25+60-75=10~g](https://tex.z-dn.net/?f=%5Ctt%2025%2B60%3Dgas%2B75%5C%5C%5C%5Cgas%3D25%2B60-75%3D10~g)
Answer:
70%of 2000 = 1400
2000 tonnes of hematite contains 1400 tonnes iron oxide .
1400 tonnes of fe2O3
fe2O3 have molar mass 159.69
calculate moles = given mass/molar mass
moles = 1400000000/159.69
moles = 8766986
one mole contains = 112 g of fe
so 8766986 moles will contain = 112×8766986
= 981,902,432 grams of ferrous
which is nothing but equal to 981.90 tonnes of iron!!
Sharing of electrons always means its a covalent bond, and unequal means it is polar, so it is a polar covalent bond
Answer:
![V_1=0.0714L](https://tex.z-dn.net/?f=V_1%3D0.0714L)
Explanation:
Hello there!
In this case, since we need to dilute the 1.75-M HCl, and the total number of moles remain unchanged, we can write:
![n_1=n_2](https://tex.z-dn.net/?f=n_1%3Dn_2)
And in terms of volume and concentration:
![C_1V_1=C_2V_2](https://tex.z-dn.net/?f=C_1V_1%3DC_2V_2)
Thus, we can solve for the volume of the concentrated HCl as shown below:
![V_1=\frac{C_2V_2}{C_1}](https://tex.z-dn.net/?f=V_1%3D%5Cfrac%7BC_2V_2%7D%7BC_1%7D)
Therefore, we plug in the data to get:
![V_1=\frac{0.250M*0.500L}{1.75 M}\\\\V_1=0.0714L](https://tex.z-dn.net/?f=V_1%3D%5Cfrac%7B0.250M%2A0.500L%7D%7B1.75%20M%7D%5C%5C%5C%5CV_1%3D0.0714L)
Best regards!