Answer:
2KClO3--------->2KCl + 3O2
Answer:
139
Explanation:
i have to do it at my school
Answer: 2 (2 neutrons are produced).
Explanation:
1) In the left side of the transmutation equationa appears:
²³⁵U + ¹n →
I am omitting the atomic number (subscript to the leff) because the question does not show them as it is focused on number of neutrons.
2) The right side of the transmutation equation has:
→ ¹⁴⁴Ce + ⁹⁰Sr + ?
3) The total mass number of the left side is 235 + 1 = 236
4) The total mass number of Ce and Sr on the right side is 144 + 90 = 234
5) Then, you are lacking 236 - 234 = 2 unit masses on the right side which are the 2 neutrons that are produced along with the Ce and Sr.
The complete final equation is:
²³⁵U + ¹n → ¹⁴⁴Ce + ⁹⁰Sr + 2 ¹n
Where you have the two neutrons produced.
Answers:
- a.) 10.0 mL of 0.0500 M HCl: 5.00 ml
- b.) 25.0 mL of 0.126 M HNO₃: 31.5 ml
- c.) 50.0 mL of 0.215 M H₂SO4: 215. ml
Explanation:
All the reactions are the neutralization of strong acids with the same strong base.
At the neutralization point you have:
- number of equivalents of the base = number of equivalent of the acid
And the number of equivalents (#EQ) may be calculated using the normality (N) concentration and the volume (V)
Then, at the neutralization point:
- # EQ acid = N acid × V acid
- # EQ base = N base × V base
- N acid × V acid = N base × V base
Also, you can use the formula that relates normality with molarity
- N = M × number of hydrogen or hydroxide ions
<u>a.) 10.0 mL of 0.0500 M HCl</u>
- The number of hydrogen ions for HCl is 1 and the number of hydroxide ions for NaOH is 1.
- 10.0 ml × 0.0500 M × 1 = V base × 0.100 M × 1
⇒ V base = 10.0 ml ×0.0500 M / 0.100 M = 5.00 ml
<u>b.) 25.0 mL of 0.126 M HNO₃</u>
- The number of hydrogen ions for HNO₃ is 1 and the number of hydroxide ions for NaOH is 1.
- 25.0 ml × 0.126 M × 1 = V base × 0.100 M × 1
⇒ V base = 25.0 ml ×0.126 M / 0.100 M = 31.5 ml
<u>c.) 50.0 mL of 0.215 M H₂SO4</u>
- The number of hydrogen ions for H₂SO4 is 2 and the number of hydroxide ions for NaOH is 1.
- 50.0 ml × 0.215 M × 2 = V base × 0.100 M × 1
⇒ V base = 50.0 ml ×0.215 M × 2 / 0.100 M = 215. ml
Einstein's famous equation, E = mc^2 relates the mass (m) of an object to energy (E). The speed of light (c), is the constant of proportionality. Einstein formulated the equation within his theory of special relativity. Indeed, a physical interpretation of this equation is that any given mass is equivalent to the energy given by the equation, if it were suddenly converted to energy. Therefore the answer to the question is true.