Answer:
4180J
Explanation:
(25.0g)(4.184J/g°C)(75°C-35.0°C)
(25.0g)(40.0°C)(4.184J/g°C)
(1.00*10³g°C)(4.184J/g°C) = 4184J
use sig figs:
4180J
Rip bro but I need the point
Answer:
anciet fossils
Explanation:
Radiocarbon dating involves determining the age of an ancient fossil or specimen by measuring its carbon-14 content. Carbon-14, or radiocarbon, is a naturally occurring radioactive isotope that forms when cosmic rays in the upper atmosphere strike nitrogen molecules, which then oxidize to become carbon dioxide.
Answer:
n₁ = 2
Explanation:
The Rydberg formula is given by
1/λ = Rh x (1/n₁² - 1/n₂² ) where Rh = Rydberg´s constant , and n₁ and n₂ are the energy levels of the transitions involved.
The highest energy line in a series will happen when n2 tends to infinity, and then in
1/λ = Rh x (1/n₁² - 1/n₂² ) the term 1/n₂² in the limit is zero
1/λ = Rh x 1/n₁²
So lets solve for n₁² :
n₁² = Rh x λ = 109,737 cm⁻¹ x 365 x 10 ⁻⁷ cm = 4.00
n₁ = √4.00 = 2
This the value for the Balmer series.