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3 years ago

How are minute and seconds are related to degrees

2 answers:

5 0

These minutes are further divided into sixty parts called seconds. The words minute and second used in this context have no immediate connection to how those words are usually used as amounts of time. In a full circle there are 360 degrees. Each degree is split up into 60 parts, each part being 1/60 of a degree.

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riadik2000 [5.3K]3 years ago

5 0

Answer:

Explanation:

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A hydrogen atom is in the 2p state. determine the possible values of its magnetic quantum number m

Aneli [31]

There are four quantum numbers: the n, l, m and ms. When the orbital is 2p, it means that n=2 and l = 1. The n number takes the whole number before the sub-orbitals. Then, the designation for the p orbital is l=1. Now, the possible values if m is a range from -l to l. Hence, in this case, that would be: -1, 0, 1.

3 0

4 years ago

What happens to an Atom when it gains two electrons

gregori [183]

When an atom gains two electrons, it becomes increasingly negative. In a neutral atom, there is the same number of protons and electrons to keep the atom charge free. By adding two electrons, you have thrown off the balance, making the atom negative

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3 years ago

What is the final concentration of cl- ion when 250 ml of 0.20 m cacl2 solution is mixed with 250 ml of 0.40 m kcl solution? (as

serious [3.7K]

CaCl2 and KCl are both salts which dissociate in water when dissolved. Assuming that the dissolution of the two salts are 100 percent, the half reactions are:

CaCl2 ---> Ca2+ + 2 Cl-

KCl ---> K+ + Cl-

Therefore the total Cl- ion concentration would be coming from both salts. First, we calculate the Cl- from each salt by using stoichiometric ratio:

Cl- from CaCl2 = (0.2 moles CaCl2/ L) (0.25 L) (2 moles Cl / 1 mole CaCl2)

Cl- from CaCl2 = 0.1 moles

Cl- from KCl = (0.4 moles KCl/ L) (0.25 L) (1 mole Cl / 1 mole KCl)

Cl- from KCl = 0.1 moles

Therefore the final concentration of Cl- in the solution mixture is:

Cl- = (0.1 moles + 0.1 moles) / (0.25 L + 0.25 L)

Cl- = 0.2 moles / 0.5 moles

Cl- = 0.4 moles (ANSWER)

6 0

3 years ago

When bromobenzene reacts with propene in a heck reaction (in the presence of pd(php3)4 and et3n) , two constitutional isomers ar

marysya [2.9K]

The Heck reaction is a coupling reaction that combines an unsaturated halide with an alkene in the presence of base and palladium catalyst to provide a substituted alkene. It an important reaction as it forms a carbon-carbon bond and allows substitution on sp² hybridized carbons.

In this example, we have bromobenzene reacting with propene and are told that two constitutional isomers are formed. The expected product is the first one shown which has the benzene substitute onto the terminal end of the alkene. The isomer by-product that is formed is substitution onto the central carbon of the propene which leads to a product with a terminal alkene.

7 0

3 years ago

What are some molecular compounds that we use in everyday life and their products?

kherson [118]

Answer:

Water. Chemical Formula: H2O.

Table Salt. Chemical Formula: NaCl.

Sucrose (Sugar) Chemical Formula: C12H22O11.

Soaps. Chemical Formula: RCOO–Na, Where R is a long chain of carbon atoms ranging from 16-18 in number.

Toothpaste. Chemical Formula: CaCO3 or NaF.

Explanation:

8 0

3 years ago