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Silicon is a common metalloid which is a chemical element but it is considered to be tetravalent metalloid which has only 4 available electrons for covalent chemical bonding in its valence region. In the Periodic Table, Silicon has atomic number 14 with Si symbol. It is good to know that silicon is less reactive that Carbon-14 based on its position in the periodic table which is in the bottom of Carbon.
The Standard Atomic Weight for Silicon is 28.0855 grams. The standard is based on the Avogadro's Constant which is 6.02214179 x 1023 mol-1. 1 mol of silicon will contains 6.02214179 x 1023 atoms of silicon. So, how many atoms are present in 12.5 gram of silicon?
In 1 mol silicon (28.0855 grams) = 28.0855/28.0855 x 6.02214179 x 1023 = 6.02214179 x 1023 atoms
In 12.5 gram silicon = 12.5/28.0855 x 6.02214179 x 1023 = 2.680271755 x 1023 atoms
Read more: How_many_silicon_atoms_are_there_in_1.00_g_of_silicon
What else can I help you with?
How many atoms are in 125 grams of Calcium?
Well, Ca has an atomic mass of 40, so one mole of Ca (6.022x1023 atoms) equals 40g.To get 5kg of Ca, you would times the 40g (one mole) by 125.5kg of Ca has 125x(6.022x1023), or602200000000000000000000 atoms.
How many neutrons does lead have?
It depends on the isotope (atoms of lead with different numbers of neutrons). There are three stable isotopes of lead:206Pb has 124 neutrons207Pb has 125 neutrons208Pb has 126 neutrons
What does 5 cubed equal?
5 cubed (5^3) equals 125.
How much heat is required to melt 125 g of ice?
Answer #1:125 grams of water (which is also 125 milliliters, or 125 cubic centimeters) requires 125 calories of heat to raise the temperature 1 degree Celsius. Note that calories are an energy source, and heat is a form of energy. If the ice is 1 degree from the melting point, it would take approximately 125 calories to bring the entire mass to the melting point to melt the ice. Granted, that is if the ice is in a completely closed system. Normally, air flow near the region will cause heat to disperse, carrying away the warmest regions of heat...requiring more heat (calories).=======================Answer #2:The first answer completely misses one of the most important and unique properties of water.If you have 1 cubic centimeter of ice at 0°C, it takes about 80 calories of heatjust to melt it into water with no change in temperature.To melt 125 g of ice, you need 9,972 calories of heat energy. And then, thetemperature of the 125 g of water that you have is still 0°C, but now it's water.
Including sea level how many contour lines would be needed to show an island 125 feet high on a map with a contour interval of 20 feet?
A contour line every 20 feet would be needed to show the island's elevation of 125 feet. This means there would be five contour lines: one at sea level, then at 20, 40, 60, 80, 100, and 120 feet.
How many half-lives have elapsed to yield a sample with 125 atoms of C-14 and 375 atoms of N-14?
To determine the number of half-lives that have elapsed, we first find the total number of atoms in the sample, which is 500 (125 + 375). The starting atom would have been from 250 atoms of C-14. To find the number of half-lives elapsed, we divide the total number of atoms by the starting amount (500/250). This gives us 2 half-lives that have elapsed.
How many half lives have elapsed to yield a sample with 125 atoms of C-14?
We have now way of knowing unless we know the initial number of C-14
The halflife of Na24 is 15 hours When there are 1000 atoms of Na24 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 45 hours there are atoms of Na24 rema?
There will be 125 atoms of Na24 remaining in the sample after 45 hours. This calculation is based on the fact that after 3 half-lives (45 hours/15 hours per half-life), the original 1000 atoms would have reduced by a factor of 2 three times, resulting in 1000/2/2/2 = 125 atoms remaining.
How many atoms are lefr not decayed in a 500 atom sample after 60 minutes if the half life is 20 minutes?
The half-life of the sample is 20 minutes, meaning that after each 20-minute interval, half of the remaining atoms will have decayed. After 60 minutes, which is three half-lives, the number of remaining atoms can be calculated as follows: After 20 minutes: 500 / 2 = 250 atoms After 40 minutes: 250 / 2 = 125 atoms After 60 minutes: 125 / 2 = 62.5 atoms Since we cannot have a fraction of an atom, we round down to 62 atoms remaining after 60 minutes.
The half-life of Na-24 is 15 hours When there are 1000 atoms of Na-24 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 45 hours there are atoms of Na-24 remaining?
Based on the half-life of Na-24, after 1 half-life (15 hours), there would be 500 atoms remaining. After 2 half-lives (30 hours), there would be 250 atoms remaining. After 3 half-lives (45 hours), there would be 125 atoms remaining in the sample.
How many moles of nickel (Ni) atoms are in 125 g Ni?
To find the number of moles of nickel atoms in 125 g of nickel, divide the given mass by the molar mass of nickel. The molar mass of nickel is approximately 58.69 g/mol. Therefore, 125 g Ni / 58.69 g/mol = ~2.13 moles of Ni atoms.
How many kilocalories are released when 125 g Cl2 reacts with silicon?
The balanced chemical equation for the reaction between chlorine gas (Cl2) and silicon (Si) is: Si + 2Cl2 -> SiCl4. The standard enthalpy change for this reaction is -657 kJ/mol. You will need to calculate the number of moles of Cl2 in 125 g and then use the balanced equation to find the amount of energy released.
Find the sample space for three question multiple-choice test with five choices?
125
What is the chemical formula for alkane which contains 125 carbon atoms?
The general formula of linear alkanes is CnH2n+2. If an alkane with 125 carbons exist (I don't know) the chemical formula will be C125H252 and the name pentacosehectane.
what is the density of a sample of a liquid that has a volume of 125 ML and the mass of 200 g?
1.6 g/ml
Who many cc does a 125 have?
125
What do you think would the world be without the knowledge of atoms?
We are as backward as 125 years ago.
