Now let's see how to make 1 N and 1M H2SO4 from 98% concentrated H2SO4 . This calculation varies with concentration of H2SO4. Because density varies with concentration of H2SO4 . Now we are having density 1.84 for 98% concentrated H2SO4. If you are going to use less concentrated H2SO4 then first find out density of it then put that value in below formula instead of 1.84 H2SO4 is liquid, so at first we need to convert H2SO4 molecular weight (gm) into volume (ml) let's use formula density = mass / volume volume = mass of HCl / density 98.08 / 1.84 V = 53.30 ml Here we are making 1M and 1N H2SO4 from 98% concentrated H2SO4. If you are going to use less concentrated H2SO4 then use that percentage value in below formula rather than 98%. Let's use formula 1M H2SO4 (98%) = 53.30 ml [ V ] 100% ...
Why do we blush ? When we are embarrassed, ashamed or shy, we blush. Blushing is governed by our sympathetic nervous system. Its functioning is not under our control I cannot control my own sympathetic nervous system? Absolutely. Now, when we are ashamed or shy, it causes us immediate stress. When something causes immediate stress, our sympathetic nervous system considers it as a threat. To defend the threat, this system orders our adrenal glands to release a hormone called adrenaline . Adrenaline speeds up our breathing rate. It expands the blood vessels so that more blood and oxygen can be reached to our body parts, thus preparing our body for fight or flight. Now, as the blood vessels on our face are very close to our skin surface, they make our face appear red, that is, we blush.