Answer:
hmm lemme think bur it will take a while
Explanation:
Appearance, melting point, density, solubility, polarity
Answer:
About 16.1 grams of oxygen gas.
Explanation:
The reaction between magnesium and oxygen can be described by the equation:
24.4 grams of Mg reacted with O₂ to produce 40.5 grams of MgO. We want to determine the mass of O₂ in the chemical change.
Compute using stoichiometry. From the equation, we know that two moles of MgO is produced from every one mole of O₂. Therefore, we can:
- Convert grams of MgO to moles of MgO.
- Moles of MgO to moles of O₂
- And moles of O₂ to grams of O₂.
The molecular weights of MgO and O₂ are 40.31 g/mol and 32.00 g/mol, respectively.
Dimensional analysis:
In conclusion, about 16.1 grams of oxygen gas was reacted.
You will obtain the same result if you compute with the 24.4 grams of Mg instead:
Answer:
Final temperature = 25.71°C
Explanation:
By using formula Q=mcΔT
let's say x is final temperature
950 = 150.1 × 4.18 × ( x - 24.2 )
950 = 627.418 × ( x - 24.2)
950 = 627.418x - 15183.5156
627.418x - 15183.5156 = 950
627.418x = 950 + 15183.5156
627.418x = 16133.5156
x = 16133.5156 / 627.418
x = 25.71 °C
So...the final temperature is 25.71 °C
Answer:
People show more interest in personal broadcasting.
Explanation:
The art of oration (speaking) is being replaced by personal broadcasting mean now people used webcam or camcorder for creating its own content and transmit it to other people through internet. Personal broadcasting provides audio and video to the individual that make it more interesting as compared to oration. People show more interest in personal broadcasting as compared to oration so that's why oration is replaced by personal broadcasting.
