Answer:
Rewrite the following sentence in reported speech
The chair person said,"A hearty welcome to all present!"
Nitrogen is expressed with this formula:

which means that every nitrogen molecules is composed of two atoms.
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Answer:
Free energy change is -7.500248 kJ/mol
Explanation:
If we have the enthalpy change and entropy change, we can find the free energy change using the equation,
ΔG = ΔH - TΔS
Temperature in K = 25°C + 273 = 298 K
ΔH for NaI = -7.50 kJ/mol
ΔS for NaI = 74 J/K mol = 0.074 kJ/K mol
Plugin the above values in the equation, we will get,
ΔG = -7.5 kJ/mol - 0.074 kJ/K mol / 298 K
= -7.5 kJ/mol - 0.000248 kJ/mol
= -7.500248 kJ/mol
Answer:
A. A superscript on the transition metal identifies its oxidation state
in the formula.
Explanation:
I've had the question
Answer:
boron, aluminum, and gallium
Explanation:
They are in group 3A on the periodic table which means they have 3 valence electrons