Answer : When we mix the aqueous solutions of magnesium sulfate with chromium acetate we get the following reaction :-
It is an example of a displacement reaction that takes place. According to the OWL solubility preparation rules all the reactants are soluble and hence the reaction occurs.
The net ionic equation of the reaction is :-
Answer:
60.9 Kelvin
Explanation: First, write out everything that you know. You are tring to find the temperature, so the temperature will be represented by x.
Pressure (P)= 4.5 atm
Volume (V)= 3L
Number of Moles (n)= ?
Gas Consant (R)= 0.0821, if the pressure is in atm, that means r is 0.0821
Temperature (T)= x
We don't have all the information we need to plug the values into the equation. We still need to know how many moles 55.0 grans of neon is.
Ne in Grams= 55
Atomic Mass of Ne= 20.1797
55/20.1797= 2.7
moles= 2.7
Now that we have all the information we need, plug everying into the equation. In case you don't know, the Ideal Gas Law Equation is PV= nRT.
(4.5)(3) = (2.7)(0.821)x
x= 60.9
Now you have your temperature! It is 60.9 in Kelvin.
All eukaryotic cells have a cell surface membrane (aka plasma membrane). It is very fragile. its role is to hold the cell together and to help control what substances can get in and out. (It is partially permeable) allowing only some substances to pass through it.
Answer:
The correct answer is option C.
Explanation:
Heat of formation is defined as change in enthalpy during the formation of 1 mole of compound from its constituent elements in its standard states.it is denoted by symbol . Its units are Kilo joules per mole.
- If <0, the change in enthalpy is negative then it means that energy is released during the formation of 1 mole of substance.
- If >0 , the change in enthalpy is positive then it means that energy is absorbed during the formation of 1 mole of substance.
For example:
286 kilo Joules of energy given out when 1 mole of liquid water is formed.
Answer:
• The Na atom is formed when the Na+ ion gains an electron.
• A Na+ ion has 10 electrons and a Na atom has 11 electrons.
• A sodium atom has one more electron shell than a sodium ion.
• A Na+ ion is formed when a Na atom loses an electron