Answer:
B&C
Explanation:
Atoms combine in whole number ratios to form compounds.
and
Atoms cannot be created or destroyed during a chemical reaction.
Answer:
Mass of butane = 1.87 g
Explanation:
Form a balanced chemical equation for the reaction stated:
C₄H₁₀ + 13/2 O₂ → 4CO₂ + 5H₂O
Number of moles of CO₂
From the equation,
1 mol C₄H₁₀ : 4 mol CO₂
0.085 mol C₄H₁₀ : 0.34 mol CO₂
Mass of butane
Answer:
The sum of the protons and neutrons
Explanation:
mass number= proton number + neutron number
Answer:
a. 5.9 × 10⁻³ M/s
b. 0.012 M/s
Explanation:
Let's consider the following reaction.
2 N₂O(g) → 2 N₂(g) + O₂(g)
a.
Time (t): 12.0 s
Δn(O₂): 1.7 × 10⁻² mol
Volume (V): 0.240 L
We can find the average rate of the reaction over this time interval using the following expression.
r = Δn(O₂) / V × t
r = 1.7 × 10⁻² mol / 0.240 L × 12.0 s
r = 5.9 × 10⁻³ M/s
b. The molar ratio of N₂O to O₂ is 2:1. The rate of change of N₂O is:
5.9 × 10⁻³ mol O₂/L.s × (2 mol N₂O/1 mol O₂) = 0.012 M/s
Answer:
B. Density
Explanation:
The remaining three affect surface currents.
<u>Continental deflections</u>: The continents that rise above sea level cause the surface currents to change direction.
<u>Coriolis effect</u>: This is the deflection of wind and ocean currents due to the Earth’s rotation.
<u>Winds</u>: These are the wind patterns that circulate the warm and cold air around the globe.