CHEMISTRY HIGH SCHOOL

Determined which equation is balanced or unbalanced.

Answers

Answer 1

Answer:

Answer:

1. balanced

2.unbalanced

3.unbalabced

4.balanced

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How are ocean waves and radio waves alike and how are they different from each other?

Answers

Ocean waves and radio waves are both forms of waves that transfer energy. They share the characteristics of wave-like behavior and energy transfer. However, they differ in several aspects.

Ocean waves require a physical medium (water) to propagate, while radio waves can travel through a vacuum or the atmosphere. Ocean waves have lower speeds compared to radio waves, which travel at the speed of light. They also have different frequency and wavelength ranges, with ocean waves having lower frequencies and longer wavelengths, while radio waves have higher frequencies and shorter wavelengths.

Ocean waves are generated by wind, seismic activity, or gravitational forces, while radio waves are generated by electronic devices. They are detected and utilized for different purposes, with ocean waves being measured for coastal engineering and oceanography, and radio waves being used for communication and radar systems.

_____ is a halogen used in gaseous and liquid form for large scale disinfection of drinking water and sewage. A. Iodine B. Chlorine C. Bromine D. Fluorine E. Betadine

Answers

Answer:

Chlorine

Explanation:

Chlorine is a halogen that is a strong oxidizer (it takes electrons from nearby compounds). In so doing, it kills bacteria, viruses, and other microorganisms. The chlorine reacts with cell walls or other vital organic compounds (e.g., proteins) to render them useless. Chlorine is relatively inexpensive and generally easy to handle, but it is dangerous in gaseous form and highly alkaline in solution, so must be stored and handled properly.

Glucose is an important sugar in many biochemical reactions what is the molarity of a solution that contains 500 grams of glucose (molecular weight= 180.16 g/mol) in 7.02 liters of solutiona. .56M
b. .78 M
c. 3.85 M
b. 4.98 M

Answers

Answer:

The correct answer is c.

Explanation:

First, look for the same problem to verify that the correct volume is 0.702 L.

Now we must calculate the amount of glucose moles (n) in the 500g:

n = $(500 g)/(180 (g)/(mol) )$

n = 2,7 mol

Molarity is given by moles of compound per liter. In this way, we calculate the molarity (M) as:

M = $(2,7 mol)/(0,702 L)$

M = $3,85(mol)/(L)$

Have a nice day!

Number of moles :

500 / 180.16 => 2.775 moles

Volume = 0.72 L

M = n / V

M = 2.775 / 0.72

M = 3.85 M

hope this helps!

Which of the following compounds, when added to water, is most likely to increase the solubility of HgS?A. KNO3
B. Na2SO4
C. KCl

Answers

Answer:

B. $Na_2SO_4$

Explanation:

Hello,

The solubility of HgS is increased by adding $Na_2SO_4$ due to common ion effect which consists on the effect that the higher solubility of $Na_2SO_4$ has over the HgS as the sulfur-based ions modify the solubility product. In such a way, by adding the sulfate, the equilibrium will be shifted rightwards, therefore the solubility is increased.

Best regards.

C. KCl- That is the answer for sure, but I dont want to explain

How many particles are in 3 moles?

Answers

$\rm 1.81* 10^2^4$ number of particles are present in 3 moles.

What are moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mol =

We know that 1 mol = $6.02* 10^2^3$

so, 3 mol =

$3 mol* (6.02* 10^2^3 )/(1 mol) = 1.81* 10^2^4 particles.$

Thus, the number of particle is $\rm 1.81* 10^2^4$

Learn more about moles, here:

brainly.com/question/15209553

We know that 1 mol= 6.02*10^23 particles.

3 mol* (6.02*10^23 particles/ 1 mol)= 1.81*10^24 particles.

The final answer is 1.81*10^24 particles~

the empirical formula of a compound is NO2. it's molecular mass is 92g/mol. What is its molecular formula?

Answers

The molecular formula:
$N_x(O_2)_x$

$M_(N_x(O_2)_x)=x * M_N + x * 2 * M_O \n \nm_N=14 \ (g)/(mol) \nm_O=16 \ (g)/(mol) \n M_(N_x(O_2)_x)=92 \ (g)/(mol) \n \n92=x * 14+x * 2 * 16 \n92=14x+32x \n92=46x \n(92)/(46)=x \nx=2 \n \nN_2(O_2)_2 \Rightarrow N_2O_4$

The molecular formula is N₂O₄.

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Is the osmosis egg challenge a chemical reaction? If so, was the stored energy in the reactants released (exothermic) or absorbed (endothermic) during this physical change? If not, was energy released (exothermic) or absorbed (endothermic) by the molecules during this physical change?

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