Answer: i might be wrong but i feel like it’s A. wind blowing at 3km/h just because “ energy of an object is the energy that it possesses due to its motion.”
Explanation:
I believe it is A because a physical change is something that can be changed back to where a chemical change can not be such as burning something.
Answer:
NH₄⁺: 0.340M
NH₃: 0.277M
Explanation:
A buffer is the mixture of a strong acid with its conjugate base.
For the buffer of NH₃ / NH₄⁺, moles of each one are:
NH₄⁺: 0.287L × (0.310mol / L) = 0.0890 moles
NH₃: 0.287L × (0.310mol / L) = 0.0890 moles
The reaction of HNO₃ with NH₃ is:
HNO₃ + NH₃ → NH₄⁺ + NO₃⁻
Moles of 1.50mL of 6.00M HNO₃ are:
1.50x10⁻³L × (6.00mol / L) = 9x10⁻³ moles of HNO₃. These moles are moles produced of NO₃⁻ and consumed of NH₃. Thus moles after reaction are:
NH₄⁺: 0.0890 moles + 0.0090 moles = <em>0.0980moles</em>
NH₃: 0.0890 moles + 0.0090 moles = <em>0.0800moles</em>
As total volume is 287.00mL + 1.50mL = 288.50mL (0.28850L), concentrations are:
NH₄⁺: 0.0980moles / 0.28850L = 0.340M
NH₃: 0.0800moles / 0.28850L = 0.277M
Answer:
The half - life of U 238 is about 4.5 billion years. As time passes, the ratio of Pb 206 to U 238 will increase and it is this which enables the age of the rock to be estimated
Explanation:
Answer:
Because they help clean up the dead in the wild.
Explanation:
Turkey vultures are often referred to as nature's garbage disposal. They feed almost exclusively on carrion - primarily mammals. However, they will also eat the carcasses of reptiles, amphibians, invertebrates, and other birds.
