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What gland weighs about 35 grams at puberty but shrinks to 6 grams by the time one is 70 years old?
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∙ 15y ago
Thymus gland
Wiki User
∙ 15y ago
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How do you get the specific gravity of a mineral?
Fill a beaker with water, and weigh it. Weigh a sample of the mineral. That's the mass of the mineral. Put the sample in the beaker and weigh that. The weight of the water-filled beaker plus the weight of the mineral sample will be greater than the weight of the beaker with mineral sample and water. The difference is the weight of the displaced water, in grams. The volume of the mineral sample, in cubic centimeters is equal to the weight of the displaced water, in grams. Calculate the specific gravity of the mineral by dividing the weight of the mineral sample by the volume of the mineral sample. Example: your beaker weighs 40 grams. Filled with water, it's 1040 grams. The sample of mineral weighs 160 grams. The beaker with the sample of mineral and water weighs 1179.7 grams. The mineral, and the beaker with water would have a combined weight of 1200 grams, but the beaker with mineral and water weighs 20.3 grams less than that, so the mineral sample is displacing 20.3 cubic centimeters of water. Given a mass of 160 grams and a volume of 2.03 CC, the specific gravity would be found by dividing 160 by 20.3. It's 7.85. (Which happens to be the specific gravity of some iron.)
What does one molecule of ammonium nitrite contain?
In chemistry and physics, a mole is an amount of a substance equal to its molecular weight in grams. For example, oxygen has an atomic weight of 16. Hydrogen has an atomic weight of 1. A molecule of water, H2O, has two atoms of hydrogen and one atom of oxygen. So its molecular weight is 1+1+16=18. So a mole of water weighs 18 grams. (And since 1 cubic centimeter of water weighs 1 gram, a mole of water would be 18 cubic centimeters.) A mole of ammonium nitrate, NH4NO2, weighs 34 grams. (14+1+1+1+1+14+16+16=34) Other useful facts about moles of gases: The atoms of many gases travel around in pairs. That is, each molecule contains 2 atoms. The hydrogen molecule is H2; the oxygen molecule is O2; and the nitrogen molecule is N2. So a mole of hydrogen gas is 2 grams; a mole of oxygen gas is 32 grams; and a mole of nitrogen gas (atomic weight 14) is 28 grams. It so happens that all gases at the same temperature and pressure contain the same number of molecules. If we take a mole of any gas at normal temperature and pressure, we find that it occupies 22.4 liters of space. So, 22.4 liters of hydrogen is one mole and it weighs 2 grams. And 22.4 liters of oxygen is one mole and it weighs 32 grams. And 22.4 liters of nitrogen is one mole and it weighs 28 grams. Air is a mixture of 80% nitrogen molecules and 20% oxygen molecules. 22.4 liters of air is one mole and it weighs 29 grams. Now you can see why a hydrogen balloon will rise in air. Each mole of hydrogen in the balloon weighs only 2 grams, while each mole of the surrounding air weighs 32 grams. Now you can calculate how big a balloon you would need to fly. Some more common gases: Carbon has an atomic weight of 12, chlorine of 35, and fluorine of 19. A mole of carbon monoxide, CO, weighs 28 grams. (12+16=28) This is very close to the weight of air, so this poisonous gas tends to hang around where it is released. A mole of carbon dioxide, CO2, weighs 44 grams. (12+16+16=44) This is much heavier than air, and, while it is not poisonous, it often accumulates in low spots like abandoned wells and cisterns, pushing out all of the air. A mole of methane, CH4, weighs 16 grams. (12+1+1+1+1=16) Notice that it, like water vapor (18), is lighter than air and will rise. A mole of Freon 12 (used in car air conditioners), CCl2F2, weighs 120 grams. (12+35+35+19+19=120). This is so much heavier than air that it is unlikely that any significant amount could ever reach the altitude of the ozone layer.
How much does one mole of iron atoms weigh?
Use the equation; mass=moles*gramformulamass or m=n*gfm m=2*55.8 = 111.6g in two moles of Iron gfm or the molecular mass of a compound can be found by adding the Relative atomic masses of each element in the compound together. For example - Carbon dioxide CO2 The formula contains 1 Carbon atom and 2 Oxygen atoms (RAMs should be found in a datasheet/book or provided in the question. RAM = relative atomic mass) RAM Carbon = 12 RAM Oxygen = 16 gfm of CO2 = 12 + 32 = 44 or 1mole of CO2 = 44g
How many molecules of chlorine are in 134.5 grams of chlorine?
http://en.wikipedia.org/wiki/Chlorine 1 mol of chlorine (Cl2) weighs (2*35.45 =)70,90 grams 134,5 grams of chlorine is (134,5/70,9 =) 1,897 mol of chlorinegas. 1,897 * 6,02 * 10^23 = 1,142 * 10^24 molecules of Cl2
What does a gallon of silicon weigh?
It is odd to encounter a "gallon" of silicon. This metalloid has a density of 2.329 grams per cubic centimeter, and since there are about 3785.412 cubic centimeters in a gallon, your gallon of silicon, which is a solid at room temperature, will weigh about 8816.22 grams. That's about 8.816 kilograms, and that's about 19.4 pounds.
What gland weights about 35 grams when you're in puberty but shrinks to just 6 grams by the time you're 70 years old?
Thymus
What gland atrophies as the person ages?
The thymus atrophies with age -- in youth it is responsible for building up a stockpile of T cells, and it begins to atrophy once it stops production. It then takes on a smaller role of stimulating the immune system -- at birth, the thymus weighs approx 15 grams. During puberty it weighs approx 35 grams. By age 25, it drops down to 25 grams, and by age 60 it weighs a mere 1/2 gram.
What is the weight of a British Sixpence?
The British Sixpence - from 1953 to 1967 weighs 2.83 grams from 1947 to 1952 weighs 2.83 grams from 1937 to 1946 weighs 2.827 grams from 1920 to 1936 weighs 2.876 grams from 1838 to 1920 weighs 3.01 grams from 1816 to 1837 weighs 2.827 grams
What are some examples of something that weighs 400 grams?
== == * a snow petrel weighs 454 grams * a can of baked beans weighs 420 grams
What weighs more than 2 grams but less than 100 grams?
something that weighs 3 grams
What weighs the equivalent to 31 grams of gold?
what weighs the same as 31 grams of gold
If an apple weighs 150 grams how much will it weighs in ounces?
150 grams = 5.3 ounces
My cat snickers weighs 11.7 pounds what is his mass in grams?
Snickers weighs about 5,310 grams.
How many grams are in nickel?
A US Nickel weighs 5 grams. A penny weighs 2.5.
What actually weighs 50 grams?
A us nickel weighs 5 grams. So ten nickels weigh 50 grams
A pail with 40 washers in it weighs 500 grams the same pail with 20 washers in it weighs 420 grams how much does the pail weigh?
340 grams
What weighs less646 grams or 1 kilogram?
646 grams weighs less than 1 kilogram.
