Finding neutrons = Mass number - proton number.
For finding neutrons for phosphorus = 31-15
=16.
First, we need to determine the half reaction of magnesium. It would be expressed as:
Mg2+ + 2e- = Mg
Given the mass of magnesium metal that is produced, we calculate the total charge of the electrolysis by the relations we can get from the half reaction. We do as follows:
4.50 kg Mg ( 1000 g / 1 kg ) ( 1 mol / 24.305 g ) ( 2 mol e- / 1 mol Mg ) ( 96500 C / 1 mol e- ) = 35733388.2 C
We are given the applied EMF in units of V. This value is equal to J/C. So, 5 V is equal to 5 J/C.
35733388.2 C (5 J/C) = 178666941 J
178666941 J ( 1 kW-h / 3.6x10^6 J ) = 49.63 kW-h
Answer:
15 grams of water
Explanation:
15 grams of water of water would lose heat the faster compared to higher masses of water.
Water generally is a poor conductor heat.
- To heat up a unit of water, significant amount of energy must be added to the body of water.
- With time, the body continues to increase in temperature.
- A 500g mass of water will take more time to lose heat.
Answer:
Petroleum:92 Percent
Natural Gas:3 Percent
Renewable energy:5 Percent
Explanation:
US primary energy consumption by source and sector (2017)[17]
Supply sources Percent of source Demand sectors Percent of sector
Petroleum
36.2% 72% Transportation
23% Industrial
5% Residential and commercial
1% Electric power Transportation
28.1% 92% Petroleum
3% Natural gas
5% Renewable energy
Natural gas
28.0% 3% Transportation
35% Industrial
28% Residential and commercial
34% Electric power Industrial
21.9% 38% Petroleum
45% Natural gas
5% Coal
12% Renewable energy
Coal
13.9% 9% Industrial
<1% Residential and commercial
91% Electric power Residential and commercial
10.4% 16% Petroleum
76% Natural gas
<1% Coal
8% Renewable energy
Renewable energy
11.0% 13% Transportation
23% Industrial
7% Residential and commercial
57% Electric power Electric power
37.2% 1% Petroleum
26% Natural gas
34% Coal
17% Renewable energy
23% Nuclear electric power
Nuclear electric power
8.4% 100% Electric power
Bone age : 22,920 years
<h3>Further explanation</h3>
Given
Nt = 2.5 g C-14
No = 40 g
half-life = 5730 years
Required
time of decay
Solution
General formulas used in decay:
t = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
Input the value :
