I believe it might be A. Damaged buildings.
B is a positive and so is Tourism.
<span>Carbohydrates because carbohydrate is a molecule that contains carbon, hydrogen and oxygen usually in a ratio of two hydrogen atoms for each carbon atom. Carbohydrates are also known as saccharides or carbs.They are basically sugar or starches.</span><span />
Answer:
3.73 atm
Explanation:
Since there is no change in temperature, we use Boyle's law.
P₁V₁ = P₂V₂ where P₁ = initial pressure of Ar gas = unknown, P₂ = final pressure of Ar gas = 2.74 atm, V₁ = initial volume of Ar gas = 6.30 L and V₂ = final volume of Ar gas = 8.57 L
P₁ = P₂V₂/V₁ = 2.74 atm × 8.57 L/6.30 L = 3.73 atm
Answer:
2.06 M
Explanation:
number of moles of MgCl₂ = mass given in gram / molar mass
molar mass of MgCl₂ = 95.211 g/mol
number of moles of MgCl₂ = 196 g / 95.211 g/mol = 2.06 mol
Molarity of MgCl₂ in the original sample = number of moles / volume in Liters = 2.06 mol / 1 L = 2.06 M
CO₂ = 12 + 2*16 = 44 g/mol
1 mole of CO₂ contain an Avogadro number of molecules of CO₂
44g of CO₂ contain 6.02 * 10²³ molecules of <span>CO₂
</span>
17.63g of <span>CO₂ will contain:
</span> 17.63 * 6.02 * 10<span>²³ /44
</span>
≈ 2.412 * 10²³ molecules of <span>CO₂
</span>
Note: 1 molecule of CO₂ has 2 atoms of O
2.412 * 10²³ molecules of CO₂ will have 2.412 * 10²³ * 2 = 4.824 * 10²³ atoms of O.
<span>4.824 * 10²³ atoms of O.</span>
