How do you balance the following equation: Ca + O_2 -> CaO?
2017年4月10日 · Ca+1/2O_2rarrCaO Make sure there's the same number of atoms on each side of the equation, On the left side there are 2 O atoms and only 1 O atom on the right. Therefore, Ca+1/2O_2rarrCaO This is the balanced reaction (it's ok to have fractions as the coefficient).
inorganic chemistry - Why doesn't CaO decompose into Ca and …
2015年12月25日 · Stability, the thermodynamic property, is defined as whether a decomposition reaction is exergonic or endergonic at a certain temperature. The reaction $\ce{CaO -> Ca + 1/2 O2}$ is endergonic across a very large temperature range. But that doesn’t necessarily help you.
What is the formula for calcium oxide? - Socratic
2016年12月15日 · CaO Calcium has a valence of +2 The oxide ion has a charge of -2 (See periodic table for these values) Ca^(2+) O^(2-)=CaO
How much #"Ca"# is consumed when #"56.8 mL O"_2"# reacts
2015年6月21日 · This reaction will consume 0.201 g of calcium. Start by taking a look at the balanced chemical equation for this reaction color(red)(2)Ca_((s)) + O_(2(g)) -> 2CaO_((s)) Notice that you have a color(red)(2):1 mole ratio between calcium and oxygen. This means that, regardless of how many moles of oxygen reacted, the reaction needed twice as many moles of calcium. Since you're at STP conditions ...
How would you balance the following equation: CH4 + O2 - Socratic
2015年12月4日 · "CH"_4" + 2O"_2rarr"CO"_2" + 2H"_2"O" "CH"_4" + O"_2rarr"CO"_2" + H"_2"O" First look at the C atoms. At first glance they are balanced with 1 C on each side. Now look at the H atoms. They are not balanced. There are 4 H atoms on the left side and 2 H atoms on the right. Place a coefficient of 2 in front of the "H"_2"O"". We now have 4 H atoms on both sides. "CH"_4" + O"_2rarr"CO"_2" + 2H"_2"O ...
How many grams of Ca does 32 grams of O2 (oxygen)have to
2018年2月14日 · So someone made a mistake... The stoichiometric equation is... Ca(s) + 1/2O_2(g) rarr CaO(g) And so ONE equiv of metal reacts with an 1/2 EQUIV of dioxygen gas... You got 72*g calcium oxide, a molar quantity of (72*g)/(56.08*g*mol^-1)=1.28*mol... And SO WITH RESPECT TO OXYGEN there is a mass of ... 1.28*molxx16.00*g*mol^-1=20.5*g....
Balancing Chemical Equations - Chemistry - Socratic
Mass is conserved rather than created or destroyed so when a chemical equation is written, it must be balanced so that there is the same amount of reactants going in as yielded product. The equation is balanced by changing the scalar numbers that precede each part of the equation.
What is the ionic formula for calcium oxide? - Socratic
2013年12月19日 · The ionic formula for calcium oxide is simply CaO. Why is this the case? The Calcium ion is an Alkaline earth metal and wants to give up the 2 s orbital elections and become a +2 cation. Oxygen has six valence electrons and is looking to gain two electrons to complete the octet (8) electron count in the valence shell making it a -2 anion. When the charges of the Calcium +2 and the Oxygen -2 ...
Which ion has the largest radius? "Na"^(+), "Ga"^(3+), "K
2018年6月18日 · "K"^"+" has the largest radius. > The ionic radii of cations follow the same trends as atomic radii. They increase from top to bottom and from right to left in the Periodic Table. (Adapted from ermannhonors.wikispaces.com) Thus, the ion with the largest radius is closest to the lower left corner of the Periodic Table, and that is the "K"^"+" ion.
If 26.35332 grams of Ca is reacted, how many moles of ... - Socratic
2017年5月31日 · 0.6575180 "mol CaO" I'll assume it reacts with excess oxygen, and forms only calcium oxide. The chemical equation for this reaction is 2"Ca" (s) + "O"_2 (g) rarr 2"CaO" (s) First let's calculate the number of moles of "Ca" that reacts, using its molar mass: 26.35332cancel("g Ca")((1"mol Ca")/(40.08cancel("g Ca"))) = color(red)(0.6575180 "mol Ca" Now, let's use the stoichiometrically equivalent ...