Answer:
a. -29.8 kJ/mol-rxn
Explanation:
For a chemical reaction system the forward and reverse rate are equal. The standard molar enthalpy formation of NH3 is -45.9 kJ/mol. For the enthalpy of NH3 (8) the molar enthalpy is -29.8kJ/mol. The molar mass of N2 = 28.02g/mol. Molar enthalpy of formation is standard amount of substance produced in the formation of a reaction. The molar enthalpy is the change in enthalpy due to reaction per mole.
Answer:
CER all starts with a question asked by the teacher. This question is based on a phenomena or lab experience. The student's explanation or answer, as you may have guessed, will consist of three parts: a claim, the evidence, and the student's reasoning. A claim is a statement that answers the question. Start with a hook or attention getting sentence. Briefly summarize the texts • State your claim. Make sure you are restating the prompt. Include a topic sentence that restates your claim and your reason.
Answer:
163.940671 grams
Explanation:
You can view more details on each measurement unit: molecular weight of Na3PO4 or grams This compound is also known as Trisodium Phosphate. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Na3PO4, or 163.940671 grams.
The largest number of the four options is 1.8 X 10-2
You have it in scientific notation.
1.80 X 10-6 = 0.00000180
1.80 X 10-4 = 0.000180 (bigger, or "less small", than the former one)
So
1.8 X 10-2 = 0.0180. As you see. The "less small", or the biggest one of them all.
As you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).
If you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:
1.8 X (10)2 = 180
So. If you have negative exponent in Scientific notation, move the dot toward left. If it is positive, toward right as many times the exponent tells you.
