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Arisa [49]
2 years ago
5

Determine whether aqueous solutions of the following salts are acidic, basic, or neutral: (a) Al(NO3)3 (b) RbI (c) KHCO2 (d) CH3

NH3Br
Chemistry
1 answer:
seraphim [82]2 years ago
7 0
  • Al(NO3)3 - acidic
  • RbI - neutral
  • KHCO2 - basic
  • CH3NH3Br - acidic

<h3>What is pH?</h3>

This is defined as the degree of acidity or alkalinity of a substance and pH from 1.0 - 6.9 is acidic, 7 is neutral while 7.1 - 14.0 is basic.

The aqueous solutions and their appropriate pH can be seen above which is the right choice.

Read more about pH here brainly.com/question/22390063

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Which moon phase does a solar eclipse occur in?
VARVARA [1.3K]

Answer:

full moon, i think

Explanation:

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3 years ago
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Determine the volume of a cereal box that has a mass of 549.98 g and density of 1.69 g/cm3​
lisabon 2012 [21]

Answer:

I used a calculator to calculate the volume:

the volume formula is V =m

/ρ

the answer is 325.43195266272 cubic meter, or about 325.43

Explanation:

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3 years ago
Explain how the Rutherford gold foil experiment correctly advanced atomic theory away from the plum pudding model?
Rudiy27

Answer is: Rutherford demonstrate that J.J Thompson's Plum Pudding model was not accurate.

Rutherford theorized that atoms have their charge concentrated in a very small nucleus.

This was famous Rutherford's Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles (helium atom particles, consist of two protons and two neutrons).  

Rutherford observed the deflection of alpha particles on the photographic film and notice that most of alpha particles passed straight through foil.

That is different from Plum Pudding model, because it shows that most of the atom is empty space.

7 0
3 years ago
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Suppose the decomposition of dinitrogen monoxide proceeds by the following mechanism:
photoshop1234 [79]

Answer:

Part A: 2N₂O(g) ⇄ 2N₂(g) + O₂(g)

Part B: -r = K*[N₂O]²

Part C: K= k1*k2

Explanation:

Part A

To do the balance chemical question for the overall chemical reaction, we must sum the reaction of the steps, eliminating the intermediaries, which are the compounds that have the same amount both at reactants and products (bolded).

N₂O(g) ⇄ N₂(g) + O(g)

N₂O(g) + O(g) ⇄ N₂(g) + O₂(g)

---------------------------------------------

2N₂O(g) + O(g) ⇄ 2N₂(g) + O(g) + O₂(g)

2N₂O(g) ⇄ 2N₂(g) + O₂(g)

Part B

The velocity of the reaction (r) can be calculated based on the reactants or based on the products. Let's do it based on the disappearing of the reactant. Because it is disappearing, the variation at its concentration must be negative, so the rate will be negative.

Let's suppose its an elementary reaction, so, the concentration of the reactant must be elevated by its coefficient. And let's call the overall rate constant as K:

-r = K*[N₂O]²

Part C

Because the steps were summed, and the reactions were not multiplied by a constant or inverted, the constant K is just the multiplication of the constants of the steps:

K= k1*k2

8 0
3 years ago
In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3 -, and bromide ion, Br-, according to the follow
maw [93]

Answer:

22.73s

Explanation:

The reaction is a second order reaction, we know this by observing the unit of the slope.

rate constant = k = 0.056 M-1s-1

the initial concentration of BrO- [A]o = 0.80 M

time = ?

Final concentration [A]t= one-half of 0.80 M = 0.40M

1 / [A]t = kt + 1 / [A]o

1 / 0.40 = 0.056 * t + 1 / 0.80

t = (2.5 - 1.25) / 0.056

t = 22.73s

5 0
3 years ago
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