Each different species of grass grows best in a particular grassland environment (determined by temperature, rainfall, and soil conditions). The seasonal drought, occasional fires, and grazing by large mammals all prevent woody shrubs and trees from invading and becoming established.
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
The answer would possible be letter a
Answer:
1.25 mol
Explanation:
1 mol ---- 6.02*`0^23 atoms
7.50*10^23 atoms * 1 mol/6.02*10^23 atoms = 1.25 mol
