What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3?
The balanced chemical reaction is:
N2 + 3H2 = 2NH3
We are given the amount of H2 being reacted. This will be our starting point.
26.3 g H2 (1 mol H2 / 2.02 g H2) 2 mol O2/3 mol H2) ( 17.04 g NH3 / 1mol NH3) = 147.90 g O2
Percent yield = actual yield / theoretical yield x 100
Percent yield = 79.0 g / 147.90 g x 100
Percent yield = 53.4%
Answer:
Explanation: All the Arrhenius and Bronsted Lowry acids release ions in solution.
According to Arrhenius and Lowry, acids are substances which release ions when dissolved in water.
Thus all are considered as acids,
Answer:
H+ ions
Explanation:
Acid release H+ ions in water after dissociation while bases release OH⁻ ions in solutions.
During dissociation, acid releases H+ ions which are characterized by losing electron with small charge charge density while bases release OH⁻ ions which have high charge density.
Typical dissociation reaction
1. HCL ⇄ H⁺ + CL⁻
In the above reaction, HCL releases H+ ion in the solution.
2. NaOH ⇄ Na⁺ + OH⁻
While in this second reaction, OH⁻ is relased into the solution.
This illustration is backed by Arrhenius theory which defined acid as substance that produce H+ ions in solutions.
Answer:
Molecules in the pie move faster than molecules in the skin, so heat is transferred to the skin.
Explanation:
B
b. a beta particle
c. gamma radiation
d. all of the above
Answer: The radiation that is emitted from the above process is alpha particle.
Explanation:
Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units. The released alpha particle is also known as helium nucleus.
Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron. The released beta particle is also known as electron.
Gamma decay is defined as the process in which an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and thus releases .
These radiations does not carry any charge and are electrically neutral.
The chemical equation for the decay of polonium-212 isotope follows:
Hence, the radiation that is emitted from the above process is alpha particle.
B. Both samples are acids, and vinegar is more acidic.
C. Both samples are bases, and rainwater is more basic.
D. Both samples are acids, and rainwater is more acidic.
Answer: The correct answer is option B.
Explanation:
pH is defined as negative logarithm of hydrogen ion concentration. It is basically defined as the power of hydrogen ions in a solution. It ranges to the scale of 1-14. The solutions are divided into 3 categories on the basis of the pH range:
We are given:
pH of vinegar = 5
pH of rainwater = 6
As, the pH of both the solutions is less than 7. Thus, both the solutions are acidic in nature and also pH of vinegar is less, so this solution will be more acidic in nature.
Hence, the correct answer is Option B.