Answer:
pH = 4.34
Explanation:
pH= -1/2(logKa) -1/2(log C)
= -1/2( log 5.98*10^-8) -1/2(log 0.0353)
=-1/2(-7.22)-1/2(-1.45)
=3.61+0.725= 4.34
The percentage composition of Nitrogen in the compound is 35.71%
<h3>How to determine the mole of nitrogen</h3>
- Volume (V) = 100 mL = 100 / 1000 = 0.1 L
- Pressure (P) = 700 mmHg
- Temperature (T) = 250 K
- Gas constant (R) = 62.364 torr.L/Kmol
- Number of mole (n) =?
Using the ideal gas equation, the mole of nitrogen can be obtained as follow
PV = nRT
n = PV / RT
n = (700 × 0.1) / ( 62.364 × 250)
n = 0.00448 mole
<h3>How to determine the mass of nitrogen</h3>
- Mole of nitrogen = 0.00448 mole
- Molar mass of nitrogen = 28 g/mol
- Mass of nitrogen = ?
Mass = mole × molar mass
Mass of nitrogen = 0.00448 × 28
Mass of nitrogen = 0.125 g
<h3>How to determine the percentage of nitrogen</h3>
- Mass of nitrogen = 0.125 g
- Mass of compound = 0.35 g
- Percentage of nitrogen =?
Percentage = (mass of element / mass of compound) × 100
Percentage of nitrogen = (0.125 / 0.35) × 100
Percentage of nitrogen = 35.71%
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A reaction that is spontaneous means that it can produce products without the supply of energy. The total energy from the reactants reached the activation energy that allow the reaction proceed. An example of this is the decay of a diamond into graphite occuring readily.
Sequence specific dna binding proteins recognize the nucleotide sequence of double-stranded dna primarily by forming non-covalent bonds with <u>Chemical groups on the edges of paired bases within the major groove.</u>
<u></u>
What Are DNA-Binding Proteins?
DNA is the blueprint for the cell. It contains information that codes for all of our traits. Essentially, our DNA is what makes us, us. But, DNA doesn't do this in isolation. There are thousands of proteins in our cells that help modulate DNA's functions. These proteins are called DNA-binding proteins, because they attach to DNA.
DNA binding proteins do many jobs including controlling protein production, regulating cell growth and division, and storing DNA inside the nucleus. Thus, if DNA is the blueprint to build the human body, then DNA-binding proteins are the parts of the cell that read and interpret the instructions to actually create and maintain the body. Let's look at the different types of DNA-binding proteins and examples of each.
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Answer:
Density, 
Explanation:
Mass of a marble slab is 38.6 kg 38600 grams
The dimensions of the marble is 17 cm×23 cm×4 cm
We need to find its density. Mass per unit volume equals density. So,
So, the density of the marble slab is 
