An object’s tendency to maintain its current state of motion called ?

Why did construction of the Panama Canal become

sukhopar [10]

Answer:

(4) The navy needed a faster way to move ships between the Atlantic and Pacific Oceans.

Explanation:

The Panama Canal was an artificial eighty-two (82) kilometers water-way that connects the Atlantic Ocean with the Pacific Ocean in Panama and it enhanced maritime trades.

The construction of the Panama Canal became more important to the United States after the Spanish-American War because the navy needed a faster way to move ships

between the Atlantic and Pacific Oceans.

5 0

4 years ago

If an atom has 5 electrons in the 3rd orbital, what "time" on a clock would the 5th

Fiesta28 [93]

Answer:

The 5th electron can be placed at either the 12, 9, 3, or 6 O'clock locations

Explanation:

The steps to writing the Lewis symbol of an atom includes;

1) The number of valence electrons for the element is determined based on the position of the element on the periodic table which arranges the elements in groups depending on their valency electrons

2) Place dots one at a time, at the top bottom , left and right of the chemical symbol of the element, with a maximum of 4 dots, in the order of your choice

However, ensure that elements with less than four valence electrons have the electrons placed at the above described locations, with a maximum of one in each location

3) Where the valence electrons are more than 4, the extra electrons are again shared in the four locations to form a pair with the previous four dots

Therefore, whereby the element has 5 valence electrons as in the question, the fifth electron can either be at the top, left, right or bottom locations, corresponding to a 12, 9, 3, or 6 O'clock locations.

7 0

3 years ago

What happens to the reaction rate as the reactants get used up in a reaction?

Alex17521 [72]

Answer:

C. The rate of the reaction begins to decrease as the reactants are used.

Explanation:

a p 3 x

8 0

3 years ago

PbSO4 has a Ksp = 1.3 * 10-8 (mol/L)2.

Oduvanchick [21]

i. The dissolution of PbSO₄ in water entails its ionizing into its constituent ions:

$\mathrm{PbSO_{4}}(aq) \rightleftharpoons \mathrm{Pb^{2+}}(aq)+\mathrm{SO_4^{2-}}(aq).$

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ii. Given the dissolution of some substance

$xA{(s)} \rightleftharpoons yB{(aq)} + zC{(aq)}$ ,

the Ksp, or the solubility product constant, of the preceding equation takes the general form

$K_{sp} = [B]^y [C]^z$ .

The concentrations of pure solids (like substance A) and liquids are excluded from the equilibrium expression.

So, given our dissociation equation in question i., our Ksp expression would be written as:

$K_{sp} = \mathrm{[Pb^{2+}] [SO_4^{2-}]}$ .

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iii. Presumably, what we're being asked for here is the <em>molar </em>solubility of PbSO4 (at the standard 25 °C, as Ksp is temperature dependent). We have all the information needed to calculate the molar solubility. Since the Ksp tells us the ratio of equilibrium concentrations of PbSO4 in solution, we can consider either [Pb2+] or [SO4^2-] as equivalent to our molar solubility (since the concentration of either ion is the extent to which solid PbSO4 will dissociate or dissolve in water).

We know that Ksp = [Pb2+][SO4^2-], and we are given the value of the Ksp of for PbSO4 as 1.3 × 10⁻⁸. Since the molar ratio between the two ions are the same, we can use an equivalent variable to represent both:

$1.3 \times 10^{-8} = s \times s = s^2 \\s = \sqrt{1.3 \times 10^{-8}} = 1.14 \times 10^{-4} \text{ mol/L}.$

So, the molar solubility of PbSO4 is 1.1 × 10⁻⁴ mol/L. The answer is given to two significant figures since the Ksp is given to two significant figures.

8 0

3 years ago

2)a dish contains a blackish-yellow powder.when a magnet is moved over it black particles iron get stuck to the magnet and only

Andrei [34K]

A element mixture (key word: mixture) due to the mixture containing 2 different types of elements it can be said that it’s highly likely that the mixture was not a compound but instead of a mixture due to mixture meaning more than 1 material. Hopes this help!

6 0

2 years ago