2 years ago

Which of these has the most kinetic energy?

Chemistry

1 answer:

katrin2010 [14]2 years ago

3 0

A. a 25 kg fish tank sitting on a table

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What is the molarity of ZnCl, that forms when 20.0 g of zinc completely reacts with CuCl2, according to the following reaction?

laila [671]

1.61m :) use the photo below

8 0

3 years ago

546.8910 - 32.9 = ? Remember to use the appropriate significant figures.

dybincka [34]

513.991

Explanation:

546.8910

- 32.9

-----------

513.991

-----------

did this help ??

4 0

3 years ago

One liter of a solution is found to contain 0.022 moles of HCl. Calculate the pH of the solution. Assume complete dissociation.

Ierofanga [76]

Answer:

The pH of the solution is 1.66

Explanation:

Step 1: Data given

Number of moles HCl = 0.022 moles

Molar mass of HCl = 36.46 g/mol

Step 2: Calculate molarity of HCl

Molarity HCl = moles HCl / volume

Molarity HCl = 0.022 moles / 1 L = 0.022 M

[HCl] = [H+] = 0.022 M

Step 3: Calculate pH

pH = -log [H+]

pH = -log(0.022)

pH = 1.66

The pH of the solution is 1.66

6 0

3 years ago

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How many protons, neutrons, and electrons does cobalt-60 have? Is this a "normal" isotope of cobalt and how do you know?

liubo4ka [24]

Cobalt-60 has 27 protons (thus 33 neutrons). If an inter-nucleus neutron decays and emits an electron, this neutron transforms into a proton. Now we have 28 protons and 32 neutrons.

8 0

2 years ago

Calculate the de Broglie wavelength of a shotgun

snow_lady [41]

Answer : The de Broglie wavelength will be $3.68\times 10^{-33}m$

Solution :

The formula used for de Broglie wavelength is:

$\lambda=\frac{h}{mv}$ ..........(1)

where,

$\lambda$ = wavelength = ?

h = Planck's constant = $6.626\times 10^{-34}Js$

m = mass = 1.2 g = 0.0012 kg

Conversion used : 1 kg = 1000 g

v = velocity = 150 m/s

Now put all the given values in equation 1, we get:

$\lambda=\frac{6.626\times 10^{-34}Js}{(0.0012kg)\times (150m/s)}$

$\lambda=3.68\times 10^{-33}m$

Therefore, the de Broglie wavelength will be $3.68\times 10^{-33}m$

3 0

3 years ago