B. since Phosphorus has an atomic mass of 30.974 (larger) than Magnesium which is 24.305 (smaller)
<span>Co3+ is Cobalt with three electrons removed (It's positive by 3). So, the abbreviated notation for Cobalt, minus three electrons (Coming from 4s and 3d) is:
[Ar]4s1, 3d5</span>
Answer:
Explanation:
Heat flow equation => q = m·c·ΔT
m = mass in grams = 10.00 grams
c = specific heat (a constant) = 0.900j/g·°C
ΔT = temperature change in °C = 50°C - 25°C = 25°C
q = (10.00g)(0.900j/g·°C)(25°C) = 225 joules absorbed*
*absorbed => endothermic process => need to show 'plus' energy change.
If the reactions were an exothermic process the problem would use terms like energy released, energy lost, energy given-up, etc... => would require using a 'negative' signage before the calculated energy value. So, the correct choice is the +225 joules value.
Answer: 1M
Explanation:
Molarity = mols/L
moles of lead bromide: 183.51/ 367.0 = 0.5 mol
500 ml/ 1000 mL = .5L
.5 mol / .5 L = 1 mol/L = 1M
Answer: Ionizing Radiation is subatomic particles or electromagnetic waves that have sufficient energy to ionize atoms or molecules by detaching electrons from them.
Example: A example of ionizing radiation is x-rays.
