All categories

2 years ago

Please help with the question attachedI need it in an hour

Chemistry

1 answer:

lawyer [7]2 years ago

4 0

Answer:

iiiiiiddddiiilllooeiuehe

You might be interested in

Which is an example of how the body maintains homeostasis? by increasing thirst when cells are low on water by decreasing thirst

Andrej [43]

Answer:

increasing thirst when cells need water

Explanation:

hope this helps

6 0

2 years ago

Read 2 more answers

What is the number of formula units in a 5.88 mol sample of Ca2O?

Viktor [21]

5.88 moles x 6.02x10^23<span> f.u./mole = </span><span>3.54x1024 formula units</span>

8 0

2 years ago

Calculate the potential for each cell as shown below and indicate whether the metal electrode in the half-reaction opposite the

Lesechka [4]

.086567 is what I think as being a math matichian

8 0

3 years ago

How much energy is released by the decay of 3 grams of 230Th in the following reaction 230 Th - 226Ra + "He (230 Th = 229.9837 g

Serhud [2]

<u>Answer:</u> The energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

<u>Explanation:</u>

First we have to calculate the mass defect $(\Delta m)$ .

The equation for the alpha decay of thorium nucleus follows:

$_{90}^{230}\textrm{Th}\rightarrow _{88}^{226}\textrm{Ra}+_2^{4}\textrm{He}$

To calculate the mass defect, we use the equation:

Mass defect = Sum of mass of product - Sum of mass of reactant

$\Delta m=(m_{Ra}+m_{He})-(m_{Th})$

$\Delta m=(225.9771+4.008)-(229.9837)=1.4\times 10^{-3}amu=2.324\times 10^{-30}kg$

(Conversion factor: $1amu=1.66\times 10^{-27}kg$ )

To calculate the energy released, we use Einstein equation, which is:

$E=\Delta mc^2$

$E=(2.324\times 10^{-30}kg)\times (3\times 10^8m/s)^2$

$E=2.0916\times 10^{-13}J$

The energy released for 230 grams of decay of thorium is $2.0916\times 10^{-13}J$

We need to calculate the energy released for the decay of 3 grams of thorium. By applying unitary method, we get:

As, 230 grams of Th release energy of = $2.0916\times 10^{-13}J$

Then, 3 grams of Th will release energy of = $\frac{2.0916\times 10^{-13}}{230}\times 3=2.728\times 10^{-15}J$

Hence, the energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

5 0

2 years ago

Explain why arginine is a basic amino acid

Mumz [18]

Answer:

There are three amino acids that have basic side chains at neutral pH. These are arginine (Arg), lysine (Lys), and histidine (His). Their side chains contain nitrogen and resemble ammonia, which is a base. Their pKa's are high enough that they tend to bind protons, gaining a positive charge in the process.

<h2>Hope it helps you.</h2>

3 0

2 years ago

Read 2 more answers

Please help with the question attachedI need it in an hour​

Please help with the question attachedI need it in an hour