Answer:
1. 6electrons because in an a neutral atom, the number of electrons and protons are equal
2. Atomic number is 10
3. 15electrons, Atomic number 15,Mass number 32
4. 7protons, Atomic number 7
1. 15protons,16neutrons
2.Number of protons is 9, atomic number is 9
3.Number of protons is 27, Atomic number is 27
Explanation:
The mass number (A)=Atomic/proton number (Z)+Neutron number (N)
Answer:
Three Oxygen atoms gains two electrons each ( total of six) from two Al atoms, each Al atom loses three electrons (total of six) to three oxygen atom , in this process each Al atom becomes Al3+ ion and Oxygen atom after gaining two electrons becomes O2− ion
Explanation:
Answer:
253 mmol
Explanation:
The solubility is calculated by the given equation:
S(g) = k P(g)
where k = 1.3 x 10⁻³ mol/L-atm
and P(g) = 0.21 (705 mmHg/760 mmHg/atm) = 0.195 atm
Notice the pressure is converted to atm because Henry´s constant is in units of atmospheres , and also we multiplied by 0.21 oxygen composition.
S(g) = 1.3 x 10⁻³ mol/L-atm x 1000 mmol/mol x 0.195 atm x =253 mmol
Here we did multiply by the factor 1000 mmol/mol since the mmol concentration is required in the answer.
B.) Gasoline. Gasoline is a complex blend of compounds made from petroleum. There are various grades of gasoline. Thus it is a mixture
The 3rd one GOOD LUCK AND HOPE IT HELPS U