Answer:
What is the oxidation number of arsenic in H2AsO4 -2?
+1, +2, +3, +4, or +5?
ps. all the numbers in the problem are subscripts,not coefficiants
Explanation:
<u>hop</u><u>e</u><u> it</u><u> </u><u>h</u><u>elps</u>
Answer:
The question has some details missing which I have shown in the attached file.
Explanation:
The concept of arrehenius equation is used to calculate the activation energy.
- Given T1 = 141.0 degree celsius = 414K and K1 = 3.3 x 10^8
- T2 = 77 degree celsius = 350K and k2 = 1.1 x 10^8
- from Arrehenius equation;
- ln(k2/k1) = -Ea/R [1/T2 - 1/T1]
- ln(1.1/3.3) = -Ea/8.314 [ 1/350 - 1/414]
- Ea = 20.679KJ/mol = activation energy for this reaction
Answer:
sulfur-35
Explanation:
Sulfur-35 is a radioactive isotope that contains 19 neutrons.
Isotopes are represented with mass numbers. Mass number is the addition of number of proton and number of neutrons.
The number of proton in sulfur = 16
Number of neutron = 19
So, mass number = no. of protons + no. of neutrons
= 16 + 19
= 35
Hence, the correct answer is sulfur-35.
<em>Hello there, and thank you for asking your question here on brainly.
The answer to this is Answer choice C: CaCl2
</em>Hope this helped you! ♥<em>
</em>
