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Rufina [12.5K]
3 years ago
8

Write the Henderson-Hasselbalch equation for a propanoic acid solution ( CH 3 CH 2 CO 2 H CH3CH2CO2H , p K a = 4.874 pKa=4.874 )

using the symbols HA HA and A − A− , and the given p K a pKa value for propanoic acid in the expression. ?

Chemistry
1 answer:
scoundrel [369]3 years ago
5 0

The answer & explanation for this question is given in the attachment below.

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Genes are sections of DNA that code for a particular trait. Genes are ?
Burka [1]

Hello! Allow me to help!

Your question: Genes are ?

My answer: In biology, a gene is a basic unit of heredity and a sequence of nucleotides in DNA that encodes the synthesis of a gene product, either RNA or protein. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function

Why is my answer correct? Good question! Allow me to explain: A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases. An international research effort called the Human Genome Project, which worked to determine the sequence of the human genome and identify the genes that it contains, estimated that humans have between 20,000 and 25,000 genes.

Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person’s unique physical features.

Scientists keep track of genes by giving them unique names. Because gene names can be long, genes are also assigned symbols, which are short combinations of letters (and sometimes numbers) that represent an abbreviated version of the gene name. For example, a gene on chromosome 7 that has been associated with cystic fibrosis is called the cystic fibrosis transmembrane conductance regulator; its symbol is CFTR.

Hope this helps! UwU

-Maxwell

(Sorry if this is a little long and confusing. D:)

8 0
3 years ago
Consider the oxidation of sodium metal to sodium oxide described by the balanced equation:
trapecia [35]

Answer:

1116g

Explanation:

We'll convert moles O2 -> moles of Na2O -> grams of Na2O.

Based on our balanced equation, we have 1 mole of O2 for every 2 moles of Na2O. This is our mole to mole ratio.

9 mol O2 x \frac{2 mol Na2O}{1 mol O2} = 18 mol Na2O

We can convert mols -> grams using the molar mass of Na2O- 62g.

18 mol Na2O x \frac{62g Na2O}{1 mol} = 1116g

4 0
3 years ago
What are the two pieces of safety equipment used to respond to fires in the lab?
Stolb23 [73]
Fire extinguishers and fire blankets are used when fires are in a lab
8 0
3 years ago
How much of a 0.250 M lithium hydroxide is required to neutralize 20.0 mL of 0.345M chlorous acid?
Bumek [7]

Answer:

27.6mL of LiOH 0.250M

Explanation:

The reaction of lithium hydroxide (LiOH) with chlorous acid (HClO₂) is:

LiOH + HClO₂ → LiClO₂ + H₂O

<em>That means, 1 mole of hydroxide reacts per mole of acid</em>

Moles of  20.0 mL = 0.0200L of 0.345M chlorous acid are:

0.0200L ₓ (0.345mol / L) = <em>6.90x10⁻³ moles of HClO₂</em>

To neutralize this acid, you need to add the same number of moles of LiOH, that is 6.90x10⁻³ moles. As the LiOH contains 0.250 moles / L:

6.90x10⁻³ moles ₓ (1L / 0.250mol) = 0.0276L of LiOH =

<h3>27.6mL of LiOH 0.250M</h3>
6 0
3 years ago
What is the correct name for Sn3(PO4)2
Soloha48 [4]

Answer:

C) Tin (||) phosphate

Explanation:

There is this list I found for ionic compound formulas:

https://www.quia.com/jg/825304list.html

It'd be a great reference to have on hand.

The name of Sn3(PO4)2 is Tin(II) Phosphate.

4 0
4 years ago
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