Identify what a bomb calorimeter measures. Identify what a bomb calorimeter measures. measures ΔE for aqueous reactions measures ΔH for oxidation solutions measures ΔH for hydrolysis solutions measures ΔT for hydrolysis solutions measures ΔE for combustion reactions

Answers

Answer 1

Answer:

Answer: Option (e) is the correct answer.

Explanation:

A device which consists of a sealed metal container and it is immersed in an insulated sealed container which is filled with water used to calculate heat of combustion of a reaction.

Volume remains constant in a bomb calorimeter. Basically, a bomb calorimeter measures the changes occurring in the internal energy because of a chemical reaction.

Thus, we can conclude that a bomb calorimeter measures $\Delta E$ for combustion reactions.

Answer 2

Answer:

A bomb calorimeter measures ΔE for combustion reactions. Thus, option E is correct.

A device which consists of a sealed metal container and it is immersed in an insulated sealed container which is filled with water used to calculate heat of combustion of a reaction.

Volume remains constant in a bomb calorimeter. Basically, a bomb calorimeter measures the changes occurring in the internal energy because of a chemical reaction.

Thus, we can conclude that a bomb calorimeter measures for combustion reactions.

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The options are

measures ΔE for aqueous reactions

measures ΔH for oxidation solutions

measures ΔH for hydrolysis solutions

measures ΔT for hydrolysis solutions

measures ΔE for combustion reactions

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Biotechnology can be both useful and potentially destructive. Choose one example of biotechnology and identify whether it has had a positive or negative effect on society. Explain your answer.

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I am not going to give you a full research report, but one example is DNA fingerprinting via gel electrophoresis. This has definitely had a positive effect on society, as it makes forensics a much more certain and just process. Gel electrophoresis can be used to separate and arrange DNA strands in order of length. You can then compare this arrangement to determine whether or not it matches another DNA arrangement. It has a very high accuracy rating, so you can be almost certain that if you have two electrophoresis results that look identical, that both DNA samples belong to the same person. This is compelling evidence that can either acquit or condemn suspects with certainty.

NEED HELP AS SOON AS POSSIBLE!7. How many atoms are present in a 6.00 g sample of silver?
a. 1.07 x 10^-1 atoms
b. 6.47 x 10^2 atoms
c. 3.35 x 10^22 atoms
d. 3.61 x 10^24 atoms

8. How many atoms are present in 2.0 x 10^6 mol of carbon?
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b. 4.0 x 10^-17 atoms
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9. what mass is present in sample of AgNO3 containing 3.14 x 10^19 formula units?
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Answers

I got :
  7) C
  8) D
  9) B
10) D

The decimal difference in my calculations may be due to my rounding off or my use of the exact values in some cases.
Note: Mr - Molar Mass
L - Avogadro's Constant

Describe the difference between polar covalent bonds and nonpolar covalent bonds using these two molecules - H2 and HCl. Which molecule contains a polar covalent bond and which molecule contains a nonpolar covalent bond? Explain your reasoning alongside describing the differences between the types of bonds.

Answers

Polar covalent bonds are between atoms with different electronegativities, whereas nonpolar covalent bonds are between atoms with the same electronegativity.

This means that HCl is a polar covalent bond, whereas H2 is a nonpolar covalent bond.

A molecule has two atoms that are bonded to the central atom and one lone pair of electrons around this central atom. What is the shape of the molecule?bent
linear
trigonal planar
trigonal pyramidal

Answers

Bent, the lone pair on the central atom push away the other atoms and the most stable configuration of the lone pair and two atoms is trogonal planar. But since you cannot see the lone pair, the shape of the three atoms is bent.

Answer:

bent

Explanation:

What is the molar mass of Al2(SO4)3?150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol

Answers

Answer:

342.17 g/mol

Explanation:

Molecular formulas is the actual number of atoms of each element in the compound. Molecular mass is the sum of the mass of each element which is present in the molecular formula is multiplied by their subscript which appear in the molecular formula.

Given,

The formula is = $Al_2(SO_4)_3$

Mass from the formula = 2×Molar mass of Aluminium + 3×Molar mass of sulfur + 12×Molar mass of Oxygen

Molar mass of Aluminium = 27.00 g/mol

Molar mass of sulfur = 32.06 g/mol

Molar mass of Oxygen = 15.99 g/mol

So,

Mass from the formula = 2×27.00 + 3×32.06 + 12×15.99 g/mol ≅ 342.17 g/mol

The molar mass of $\rm Al_2(SO_4)_3$ is 342.17 g/mol. The correct answer is option C.

Molar mass is the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol).

To calculate the molar mass of $\rm Al_2(SO_4)_3$ , we need to add up the atomic masses of all the atoms in one formula unit.

So, the molar mass of $\rm Al_2(SO_4)_3$ can be calculated as follows:

Molar mass = (2 × atomic mass of Al) + (3 × atomic mass of S) + (12 × atomic mass of O)

= (2 × 26.98 g/mol) + (3 × 32.07 g/mol) + (12 × 16.00 g/mol)

= 342.17 g/mol

Therefore, the answer is option C. 342.17 g/mol is the molar mass of $\rm Al_2(SO_4)_3$ .

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Which occurs when two fluorine atoms react to produce a fluorine molecule? (1) Energy is absorbed as a bond is broken. (2) Energy is absorbed as a bond is formed. (3) Energy is released as a bond is broken. (4) Energy is released as a bond is formed.

Answers

When two fluorine atoms react to produce a fluorine molecule, Energy is released as a bond is formed. The answer is number 4. IT takes energy to form a bond from two atoms that is why energy is releases after the bond is formed.

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