Answer:
A.
Explanation:
Sulfur has 6 valence electrons, therefore has 6 dots.
- Hope that helps! Please let me know if you need further explanation.
Answer:
Because a glass window is harder than a fingernail, a glass window would have a higher number on Mohs hardness scale
Explanation:
1. is correct but 2. makes more sense because DNA passes traits down, and organisms surroundings has nothing to do with it
Answer:
We need 420 cal of heat
Explanation:
Step 1: Data given
Mass of the aluminium = 200.0 grams
Temperature rises with 10.0 °C
Specific heat of aluminium = 0.21 cal/g°C
Step 2: Calculate the amount of heat required
Q =m * c* ΔT
⇒with Q = the amount of heat required= TO BE DETERMINED
⇒with m = the mass of aluminium = 200.0 grams
⇒with c = the specific heat of aluminium = 0.21 cal/g°C
⇒with ΔT = the change of temperature = 10.0°C
Q = 200.0 grams * 0.21 cal/g°C * 10.0 °C
Q = 420 cal
We need 420 cal of heat (option 2 is correct)
Answer:
Explanation:
pH = 12
[H⁺] = 10⁻¹²
[OH⁻¹ ] [H⁺] = 10⁻¹⁴
[OH⁻¹ ] = 10⁻²
NaOH = Na⁺¹ + OH⁻¹
NaOH is a strong base so it dissociates 100%
[OH⁻¹ ] = 10⁻²
molarity of NaOH = 10⁻² M
= .01 M .
