As Density = Mass/Volume
Mass = 26.0g
Density = 1.44g/mL
Therefore Volume = Mass/Density
=> Volume = 26.0/1.44 = 18.055... = 18.1mL (to 3 sig figs)
Answer:
The atomic theory has changed over time as new technologies have become available. Scientific knowledge builds on past research and experimentation. 400 B.C. Democritus, a philosopher in ancient Greece, began the search for a description of matter.
Explanation:
Answer:
24.24 g
Explanation:
First we <u>calculate how many moles are there in 300 mL of a 0.234 M solution</u>, using the <em>definition of molarity</em>:
- Molarity = moles / liters
Converting 300 mL to L ⇒ 300 mL / 1000 = 0.300 L
- 0.234 M = moles / 0.300 L
Then we <u>convert 0.78 moles of NH₄F into grams</u>, using its <em>molar mass</em>:
- 0.78 mol * 31.073 g/mol = 24.24 g
The final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.
SPECIFIC HEAT CAPACITY:
- The amount of heat absorbed or released by a substance can be calculated using the following formula:
- (m × c × ∆T) water = - (m × c × ∆T) metal
According to this question;
METAL:
- m = 30.6g
- c = 0.380 J/g°C
- ∆T = T - 87.4°C
WATER:
- m = 62.3g
- c = 4.184J/g°C
- ∆T = T - 28.3°C
- 62.3 × 4.184 × (T - 28.3) = - {30.6 × 0.380 × (T - 87.4)}
- 260.7T - 7376.8 = - {11.63T - 1016.3}
- 260.7T - 7376.8 = -11.63T + 1016.3
- 260.7T + 11.63T = 1016.3 + 7376.8
- Therefore, the final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.
Learn more at: brainly.com/question/11194034?referrer=searchResults
It’s called an ion . An atom that loses electron is called an ion