151.55 x 4 you have to add the molar masses for each element together.
Answer:
72·45 °C
Explanation:
Given
Mass of sample of aluminum is 500·0 g
Initial temperature is 25·0 °C = 298 K
Heat absorbed from surroundings is 32·60 kJ
Heat capacity of aluminum is 0·9 J/g K
Formula for amount of heat transfer is
<h3>Q = m × s × ΔT</h3>
where
Q is the amount of heat transfer
m is the mass of the substance
s is the heat capacity of the substance
ΔT is the change in temperature
Let the final temperature be T K
∴ 32·60 × 1000 = 500 × 0·9 × (T - 298)
T - 298 = 72·45
∴ T = 370·45 K = (370·45 - 298) °C = 72·45 °C
∴ Final temperature is 72·45 °C
Answer:
It get thicker beacause the mid ocean
Explanation:
Because when it gets moved back the heat rises and it builds up to be thicker.
Acid is a kind of chemical compound that when dissolved in water gives a solution with H+ ion activity more than purified water. A base is an aqueous substance that donates electrons, accept protons or release hydroxide (OH-) ions. An acid is a proton donor. While a base is a proton acceptor.
Ionic bonds are formed when there is complete transfer of valence electrons between two atoms.
Electronegativity tells the trend of an atom to atract electrons.
You should search for the complete set of rules that indicate whether an ionic or covalent bond happens.
There are two relevant rules to state if whether an ionic bond will happen:
- When the difference of electronegativities between the two atoms is greater than 2.0, then the bond is ionic.
- When the difference is between 1.6 and 2.0, the bond is ionic if one of the elements is a metal.
You need to list the electronegativities of the five elements (there are tables with this information)
Element electronegativity
Cu: 1.9
H: 2.2
Cl 3.16
I: 2.66
S: 2.58
Differences:
Cu / S: 2.58 - 1.9 = 0.68
H / S: 2.58 - 2.2 = 0.38
Cl / S: 3.16 - 2.58 =0.58
I / S: 2.66 - 2.58 = 0.08
Those differences are too low to consider that the bond is ionic.
Then the answer is that none of those atoms forms an ionic bond with sulfur.