3, 2, 1, 6
Explanation:
To balance the chemical equation the number of atoms of each element
entering the reaction have to be equal to the number of atoms of each
element leaving the reaction, in order to conserve the mass.
In our case we have:
3 CaCl₂ + 2 Na₃PO₄ → Ca₃(PO₄)₂ + 6 NaCl
So the stoechiometric coefficients will be:
3, 2, 1, 6
Learn more about:
balancing chemical equations
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<span>The gas that is formed is a different state of matter from the baking soda and lemon juice. The lemon juice has a different odor or smell than the gas. There is no color in the gas, while the lemon juice is yellow, and the baking soda is white.
^^^^^ hope this helps you! :) </span>
The mass of copper (Cu) is 63.55 grams.
Remember that 6.022×10²³ atoms = 1 mol (Avogadro's number).
To get from grams to atoms, you need to multiply 1.2 grams of copper × 1 mol of copper × 6.022×10²³ atoms of copper and divide it by 63.54 grams of copper and 1 mol of copper.
This will cancel out the grams and moles to give you the answer in atoms of copper!
1.2 grams of copper × 1 mol of copper × 6.022×10²³ atoms of copper
63.54 grams of copper x 1 mol of copper
= 1.137×10²² atoms of copper
= round to 2 sig figs: 1.1×10²² atoms of copper
