For water to freeze it would need to be 32 degrees Fahrenheit or 0 degrees Celsius.
<span>Non-stoichiometric defects are </span>compounds which contain the combining elements in a ratio different from that required by their stoichiometric formula. The solids with metal excess <span>defect </span>contain metal in excess to the stoichiometric ratio. Such defect is caused due to either of the following reasons:
1. <span>Metal excess Defect due to Anionic Vacancies:
In this, </span>negative ions may be missing from their lattice sites leaving holes in
which the electrons remain entrapped to maintain the electrical
neutrality.
2. Metal excess defect due to the presence of extra cations at interstitial sites:
In this case, there are extra positive ions occupying interstitial
sites and the electrons in another interstitial sites to maintain
electrical neutrality. The defect may be visualized as the loss of
non-metal atoms which leave their electrons behind. The excess metal
ions occupy interstitial positions.
No. of mol. of NaOH used: (30/1000)*0.5= 0.015mol
Mole ratio of NaOH:H2SO4= 2:1
No. of mol. of H2SO4: 0.015/2= 0.0075mol
Conc. of acid= 0.0075/(50/1000)= 0.15moldm^-3
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<u>Answer:</u> The correct answer is 1.
<u>Explanation:</u>
When alkanes are reacted with chlorine gas at high temperatures or in the presence of light, it leads to the formation of chloro alkanes.
The process is known as chlorination.
Let us take the simplest alkane which is methane having chemical formula 
The chemical equation for the chlorination of methane follows:
![CH_4+Cl_2\xrightarrow[]{h\nu}CH_3Cl+HCl](https://tex.z-dn.net/?f=CH_4%2BCl_2%5Cxrightarrow%5B%5D%7Bh%5Cnu%7DCH_3Cl%2BHCl)
The product formed is chloromethane.
Hence, the correct answer is 1.
Although radiocarbon dating provides a useful tool there are some things that may make an artifact unsuitable for this process. . The artifact is made from the wrong type of material. Carbon dating relies on measurement of radioactive decay from carbon 14 isotopes, some materials naturally do.
