According to the chemical equation, the reaction ratio between O2 and CO2 is 2:1, which mean for every 2 moles of O2 reacted there is 1 mole of CO2 formed.
Use the molar mass and mass of O2 to find out the moles of O2: moles of O2 = mass of O2/molar mass of O2 = 8.94g/32.00g/mol = 0.2794 mole. Therefore, the moles of CO2 that formed is 0.2794moles/2 = 0.1397 mole
Use the moles and molar mass CO2 to find out the mass of CO2:
Mass of CO2 = moles of CO2 * molar mass of CO2 = 0.1397 mole * .44.01g/mole = 6.15 g.
So the answer is B 6.15g.
Answer:
thoracic cavity
Explanation:
The ventral body cavity in human body is the front aspect of the human body. Ventral body cavity is combined with the combination of three components that include the thoracic cavity, the pelvic cavity and the abdominal cavity.
So, Thoracic cavity is the components of the anterior cavity that refers to the the ventral internal organs above the diaphragm.
Hence, the correct answer is "thoracic cavity".
250f degrees
-3.0c
360f boiling -4.0c freezing
34g/mol
Answer:
1185.0 J.
Explanation:
- The amount of heat needed to accomplish this process can be calculated using the formula:
<em>Q = m.C.ΔT</em>, where,
Q is the amount of heat needed,
m is the mass of the copper <em>(m = 47.35 g)</em>,
C is the specific heat of Cu<em> (C = 0.385 J/g.°C)</em>,
ΔT is the temperature difference (the final temperature - the initial temperature <em>(ΔT = 85.0 - 20.0 = 65.0 °C)</em>.
<em>∴ The amount of heat needed Q = m.C.ΔT </em>= (47.35 g) (0.385 J/g.°C) (65.0 °C) = 1184.933 J ≅ 1185.0 J.