Answer:
The Sun, Earth, and the Moon form a night angle.
Explanation:
Water and hydrogen peroxide are different compounds although they have the same kind of atoms. The molecular formula of water is H2O (two atoms of oxygen chemically bonded to one atom of oxygen). The molecular formula of hydrogen peroxide is H2O2, (each atom of oxygen is chemical bonded to one atom of H and other atom of O). So,<span> the presence of different chemical bonds leads to different products with different chemical properties.</span><span />
Answer:
English language please give me a
atoms are made of 3 types of subatomic particles ; protons, neutrons and electrons.
Atomic number is the number of protons. Atomic number is characteristic for the element. So atoms of the same element will have the same number of protons.
mass number is the sum of protons and neutrons
Isotopes are atoms of the same element with different mass numbers. So since they are the same element the number of protons will be the same. But different mass numbers means number of neutrons will be different
therefore the three known forms of hydrogen are called A. isotopes
each of these forms will have the same number of A. protons
but different numbers of B. neutrons in their nuclei
Answer:
Percent yield = 7.1%
Explanation:
The general reaction of the problem is:
Ca(OH)₂ + CO₂ → H₂O + CaCO₃
To solve this question we need to find theoretical yield using the amount of carbon dioxide added because:
Percent yield = Actual yield (3.22g) / Theoretical yield * 100
Theoretical yield is the maximum amount of product that could be obtained. To find it we need to convert the mass of CO₂ to moles. The moles of CO₂ = Moles of CaCO₃:
<em>Moles CO₂ -Molar mass: 44.01g/mol):</em>
20.0g * (1mol / 44.01g) = 0.454 moles CO₂ = Moles of CaCO₃ produced
<em>Mass CaCO₃ = Theoretical yield -Molar mass: 100.09g/mol-:</em>
0.454 moles * (100.09g / mol) = 45.5g of CaCO₃ = Theoretical yield.
Replacing:
Percent yield = 3.22g / 45.5g * 100
<h3>Percent yield = 7.1%</h3>