Answer:
If you usually have a regular cycle, a change in your cycle — such as suddenly having two periods in a month — could indicate a medical condition. Some health conditions cause bleeding that can be mistaken for a period: Pregnancy can cause spotting.
Explanation:
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Ankle Sprain occurs and such injuries to the ligaments or tendons of the ankle happen during athletic events. <span>A </span>sprained ankle<span> is an injury that occurs when you roll, twist or turn your ankle in an awkward way. </span>The best remedy for the sprain is to put ice to keep down the swelling. Rest your ankle by not walking on it and e<span>levate the foot by reclining and propping it up above the waist or heart as needed.</span>
The Errors for the setup or preparation of ammonia gas includes:
- inadequate temperature use
- absence of a catalyst
- inadequate pressure during preparation of the ammonia gas.
Ammonia gas is the hydride of nitrogen. In nature, this gas is produced when nitrogenous matter decays in the absence of air.
In the industrial preparation of ammonia gas, it is manufactured from nitrogen and hydrogen by the Haber process.
Since the direct combination between nitrogen and hydrogen is reversible, special conditions of reaction are necessary for the optimum yield of ammonia. These include:
- Catalyst: The presence of finely divided iron as a catalyst is necessary for the optimum yield of ammonia gas.
- Temperature: the Haber process requires the temperature of about 450°C for the optimum yield of ammonia gas
- Pressure: A pressure of about 200 atmospheres is required.
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