For each element in the table below, use the Gizmo to find the number of valence electrons and the list thevalence based on the Lewis diagram. Then find the sum of these numbers.


IF SOMEONE COULD JUST HELP ME OR EXPLAIN HOW TO DO IT PLEASE! THANK YOU

Answer: 238.6 J

Explanation:

1) Chemical energy is indicated as enthalpy

2) Energy balance:

∑ enthalpy of the reactants + energy added = ∑ enthalpy of the products + energy released.

3) ∑ enthalpy of the reactants = 85.1 J + 87.9 J = 173 J

4) energy added = 104.3 J

5) ∑ enthalpy of the products = 38.7 J + D

6) energy released = 0

7) Equation:

173J + 104.3J = 38.7 + D + 0

⇒ D = 173J + 104.3J - 38.7J = 238.6J, which is the chemical energy of the product D.

Answer:238.6 J

Explanation:

Answer:

The correct answer is "Oxidation at the anode and reduction at the cathode".

Explanation:

A rechargeable battery is recharged by the movement of electrons from an external power source into the battery. In order to achieve this, two process take place inside the rechargeable battery: oxidation at the anode and reduction at the cathode. The electrons flow within the battery from the anode to the cathode, this happens by the oxidation of the anode (loss of electrons) and the reduction at the cathode (gain of electrons).

Answer:

I think robots would be better. Even though it might take time or take a lot of money to make the robots, it is safer than sending humans into space. Also, if we were to send a ship somewhere far away in our solar system or even past it, it would be hard for humans, and they may not even survive long enough to get there. Robots, however, can survive longer, and, since they are programmed by humans, we can program them to record the data in space, and they can constantly record space as they travel. We also would be risking less lives, and wouldn't be putting too many risks on the survival of the humans sent into space. The only downside would be that the robots can malfunction, but other than that, robots are better. :)

Answer:

The National Aeronautics and Space Administration has a difficult task. It must convince U.S. taxpayers that space science is worth $16.25 billion a year. To achieve this goal, the agency conducts an extensive public-relations effort that is similar to the marketing campaigns of America's biggest corporations. NASA has learned a valuable lesson about marketing in the 21st century: to promote its programs, it must provide entertaining visuals and stories with compelling human characters. For this reason, NASA issues a steady stream of press releases and images from its human spaceflight program

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The space agency is now saddled with the International Space Station, the budget-hemorrhaging “laboratory” orbiting Earth. NASA says the station provides a platform for space research and helps to determine how people can live and work safely in space. This knowledge could be used to plan a manned mission to Mars or the construction of a base on the moon. But these justifications for the station are largely myths. Here are the facts, plain as potatoes: The International Space Station is not a platform for cutting-edge science. Unmanned probes can explore Mars and other planets more cheaply and effectively than manned missions can. And a moon colony would be a silly destiny.

The Myth of Science

IN 1990 THE American Physical Society, an organization of 41,000 physicists, reviewed the experiments then planned for the International Space Station. Many of the studies involved examining materials and fluid mechanics in the station's microgravity environment. Other proposed experiments focused on growing protein crystals and cell cultures on the station. The physical society concluded, however, that these experiments would not provide enough useful scientific knowledge to justify building the station. Thirteen other scientific organizations, including the American Chemical Society and the American Crystallographic Association, drew the same conclusion.

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Despite the scientific community's disapproval, NASA went ahead with experiments on the space station. The agency has been particularly enthusiastic about studying the growth of protein crystals in microgravity; NASA claims the studies may spur the development of better medicines. But the American Society for Cell Biology has bluntly called for the cancellation of the crystallography program. The society's review panel concluded that the proposed experiments were not likely to make any serious contributions to the knowledge of protein structure.

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OP already did it - CONGRATS!!

here are the steps 2 get the same ans:

(NH4)2 CO3 has 2x N, 8x H, 1x C and 3x O per molecule

so its molecular mass = 2x14 + 8x1 + 1x12 + 3x16

=28+8+12+48

=96g

of that 96g, 8x1=8g is due to Hydrogen

so by ratio n proportion, 1.00g will have 1x8/96 = 1/12g = 0.083g of H