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alexdok [17]
3 years ago
10

A motorcycle is moving at a constant speed of 35 km/h. How long (in hours) does it take the motorcycle to travel a distance of 6

2 km?
Chemistry
2 answers:
mamaluj [8]3 years ago
7 0

Answer:

   

Explanation:

Nitella [24]3 years ago
5 0

Answer:

Hope this helps !

Explanation:

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What is Kb for N2H4 if the pH of a 0.158M solution of N2H5Cl is 4.5?
olasank [31]

Answer:

Kb= 1.58 * 10^{-6}

Explanation:

The correct question is

What is Kb for N2H4 if the pH of a 0.158M solution of N2H5Cl is 4.5?

Solution-

N2H4Cl hydrolyses on addition of water

The reaction equation is as follows -

N2H4+ + H2O ----> N2H4 + H3O+

Ka = \frac{K_w}{K_b} = \frac{10^{-14}}{K_b}

pH = 4.5

[H+] = 10^{-pH} = 10^{-4.5}

K_b=  \frac{10^{-14} }{K_b} =  \frac{Y_2}{0.158}  \\K_b= \frac{(10^{-4.5})^2}{0.158}\\=> Kb = 0.158 * 10-14 /(10-4.5)2

 Kb= 1.58 * 10^{-6}

3 0
2 years ago
What is the number of moles in 546 g strontium nitrite?
Eduardwww [97]
The answer is 2.58 mol
4 0
2 years ago
Calculate the mass of nitrogen dissolved at room temperature in an 95.0 LL home aquarium. Assume a total pressure of 1.0 atmatm
harina [27]

Answer:

86.3 g  of N₂ are in the room

Explanation:

First of all we need the pressure from the N₂ in order to apply the Ideal Gases Law and determine, the moles of gas that are contained in the room.

We apply the mole fraction:

Mole fraction N₂ = N₂ pressure / Total pressure

0.78 . 1 atm = 0.78 atm → N₂ pressure

Room temperature → 20°C → 20°C + 273 = 293K

Let's replace data: 0.78 atm . 95L = n . 0.082 . 293K

(0.78 atm . 95L) /0.082 . 293K = n

3.08 moles = n

Let's convert the moles to mass → 3.08 mol . 28g /1mol = 86.3 g  

8 0
3 years ago
What is thr valency of scadium
Hoochie [10]

scandium is a transition metal and shows a valency of 3.

4 0
3 years ago
Apakah fungsi sel palisade​
Savatey [412]

Answer:

Sel palisade terdapat di daun dan fungsi utamanya adalah penyerapan cahaya sehingga fotosintesis dapat berlangsung.

Explanation:

8 0
2 years ago
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