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3 years ago

Electrons have been shown to have both wavelike and particle-like properties. (4 points)

Chemistry

1 answer:

Alex3 years ago

4 0

Answer:

True

Explanation:

Because electrons go in different paths they can be a wavy type of path and they have particle like properties too because they are small and then they can be in string like forms too.

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A student submits the following work on the mass number, but he has made a few mistakes. Select the sentences that are incorrect

rewona [7]

Answer

Calculating the mass number for an atom requires that we know the atomic number and the number of protons in the atom’s nucleus. The mass number then gives us the average weight of atoms of a given element. However, as long as the number of protons equals the number of neutrons, the values balance out and we always obtain a whole number for the mass number.

Explanation:

those 3

7 0

4 years ago

Given the following balanced chemical reaction:

Gnom [1K]

Answer:

Explanation:

according to balance chemical equation

3 A2 moles produced 2 moles of A3B

so 12 moles A2 will produced moles of A3B= 12*2/3=24/3= 8

therefore 12 moles of A2 produced 8 moles of A3B

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4 years ago

The Sunhawk, a car built by students at SUNY New Paltz, prompted Forbes Magazine to ask “Is The $250,000 Sunhawk theSolar Car of

olga2289 [7]

Answer:

The potential of energy availability at all locations where there is Sunlight

Explanation:

One advantage in owning a solar car is the potential of energy availability

The solar car source of energy is from the Sun which is readily available during the daytime where there is a clear sky. The energy from sunlight is converted to to electrical energy by the photovoltaic cells on solar panels installed on the roof area of solar powered cars

The energy from the Sunlight is a form of renewable energy and therefore allows for better stability as well as the possibility of reuse of the energy

There are no emissions from the use of solar cars including noise, making the solar car very environmentally friendly.

8 0

3 years ago

(a) Write a briefexperimental procedure for the chromic acid test.Include all observations such ascolor change, precipitation, e

mel-nik [20]

Answer:

See explanation

Explanation:

a) -About 1-2 drops of the unknown is dissolved in approximately 1 mL of analytical grade acetone standard solution. The test solution is added and shaken thoroughly. If a positive test is not immediately observed, the set should be allowed to stand for 1-2 minutes. A positive result means the appearance of a green color.

b) The functional groups that can be distinguished by the test are alcohols and aldehydes.

Aldehydes give a positive test to chromic acid but ketones do not.

Primary and secondary alcohols give a positive test to chromic acid but tertiary alcohols do not.

c) Chromic Acid Test involves Cr in the +6 oxidation state. A positive test implies the reduction of orange Cr^6+ to green chromium Cr^3+.

d) The compounds were not shown but this image attached from lumen learning summarizes the reaction mechanism of chromic acid test.

3 0

3 years ago

A solution is prepared by mixing 0.10 of 0.12 M sodium chloride with 0.23 L of a 0.18 M magnesium chloride solution. What is the

Ad libitum [116K]

Answer:

pCl⁻ = 0.54

Explanation:

First we calculate how many Cl⁻ moles are coming from each substance, using the given volumes and concentrations:

0.12 M NaCl * 0.10 L = 0.012 mol NaCl = 0.012 mol Cl⁻

0.18 M MgCl₂ * 0.23 L = 0.0414 mol MgCl₂ = (0.0414 * 2) 0.0828 mol Cl⁻

The final volume of the mixture is = 0.10 L + 0.23 L = 0.33 L

Now we calculate [Cl⁻], using the total number of Cl⁻ moles and the final volume:

[Cl⁻] = (0.012 mol + 0.0828 mol) / 0.33 L = 0.29 M

Finally we calculate the pCl⁻ of the resulting solution:

pCl⁻ = -log[Cl⁻]

pCl⁻ = 0.54

7 0

3 years ago