Determine the empirical and molecular formulas for a compound that has 10 pa a molar mass of 300 g/mol, and is 60.0% C, 12% H, and 28% N by composition.​

Answer:

The average speed is 553.27[tex]\frac{km}{hour}[/tex]

Explanation:

Speed is the physical magnitude that shows and expresses the variation in position of an object and as a function of time. In other words, the speed relates the distance traveled by an object in the unit of time.

The average speed is the quotient of the space traveled by an object and the time it takes to cover the path:

[tex]speed=\frac{distance}{time}[/tex]

In this case:

So, replacing in the definition of speed:

[tex]speed=\frac{3,043 km}{5.5 hours}[/tex]

Solving:

speed= 553.27[tex]\frac{km}{hour}[/tex]

The average speed is 553.27[tex]\frac{km}{hour}[/tex]

Answer:

#3

Explanation:

not sure but it's close to 5,100

Answer:

the second one

Explanation:

because there are 3 of Na and one N

Answer:

a. more mosquitos more malaria

b. DDT worked to keep malaria numbers down by killing mosquitos

c. silent spring's great PR campaign got it banned and with the help of the EPA it was banned almost worldwide and if it was not banned manufacturing it stopped

d. it will continue to increase and 100s of millions of dead will be stacked even higher from malaria

Explanation: it is a tragedy, not sure if that is what you were given to read but that is the side that is rarely told

the birds all dying was not correct, it is not a cartcinogen, it doesn't poison the ocean

here is an interesting quote that is rather telling about how some with power make their decisions

My own doubts came when DDT was introduced for civilian use. In Guyana, within two years it had almost eliminated malaria, but at the same time the birth rate had doubled. So my chief quarrel with DDT in hindsight is that it has greatly added to the population problem.

– Alexander King, cofounder of the Club of Rome, 1990

Absolutely horrific, he is saying that the problem with DDT is that it saved lives

Answer:

1 Valence Electron

2 Proton

3 Neutron

4 Nucleus

Explanation:

im smart

Answer:

Everyone, the answer is actually B. Providing shelter for marine organisms

Explanation:

We just went over this question in class, this is the right answer. Causing sediment to erode in the waters just doesn't make any sense.

The materials which are used to construct artificial reefs includes rocks, wood, old tires, etc. The artificial reef affect the ocean ecosystem by providing shelter for marine organisms. The correct option is B.

An artificial reef is defined as the manmade structure which may mimic some of the characteristics of the natural reef. The submerged shipwrecks are the most common form of artificial reef. The oil and gas platforms, bridges, etc. and other offshore structures are also function as artificial reefs.

From tourism to marine recreation and also for sport fishing, the reefs play an important role in local economies. They are also important for the health of the ocean and provides habitat for the variety of marine life and support the ocean ecosystems.

The artificial reefs are generally constructed to protect and enhance or restore the components of the marine ecosystems.

Thus the correct option is B.

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Answer:

you wont be able to ask any more questions until you answer some bc you get points from answering questions but you loose points when you ask them

Explanation:

Answer:

Good thing:)

Answer:

C3F7

'Tri' means 3

Tricarbon means 3 carbon

"Hepta" means 7

Fluoridez molecular formula is "F"

hence F7

what? what do you want

Answer:

1

Explanation:

Answer:

Easy portability,easy convertability, high calorific value for its unit mass.

Explanation:

Oil is so incredibly valuable as an energy source as it has easy portability, easy convertibility, high calorific value for its unit mass.

Any chemical compound that is nonpolar, predominantly hydrocarbon-based, hydrophobic, and lipophilic is considered to be an oil. Typically combustible and surface active, oils. Most oils are lipids which become liquid above room temperature and are unsaturated. Classes of chemical substances that may be unconnected in structure, characteristics, and usage are included in the general concept of oil.

They are employed in the production of numerous varieties of paints, plastic bottles, and various other products, as well as for usage as food (such as olive oil), fuel (such as heating oil), lubricant (such as motor oil), and medical uses. Some religious rituals and ceremonies employ specially formulated oils as cleansing elements. Oil is so incredibly valuable as an energy source as it has easy portability, easy convertibility, high calorific value for its unit mass.

Therefore, oil is so incredibly valuable as an energy source as it has easy portability, easy convertibility, high calorific value for its unit mass.

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Answer:

de lapora en ciesta coma bodre sin una jacsinis loadera comastora jingla belaa

Explanation:

Answer:

B

Explanation:

That seem the most locigal to me

Answer:

I'm pretty sure its 2

Explanation:

because that's the only on that makes sense

Answer:

Molarity of solution = 0.77 (Approx.)

Explanation:

Given:

Moles of LiCl = 0.529

Volume of water  = 687

Find:

Molarity of solution

Computation:

Molarity of solution = [Moles/Volume]1000

Molarity of solution = [0.529/687]1000

Molarity of solution = 0.77 (Approx.)

Answer:these starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products

Explanation:I hope this helps

Answer:

a. 4.46 moles de CO₂

b. 80.2 g de H₂O

38.25 moles de H₂

5.55 L de dióxido de carbono

Explanation:

Comenzamos con la reacción: CO₂ (g) + 2 KOH (l) → K₂CO₃ ↓ (s) + H₂O (l)

a. Podemos ver que la relación estequiométrica es 2 a 1.

Pasamos la masa de KOH a moles → 500 g . 1mol/ 56.1g = 8.91 moles

2 moles de KOH necesitan 1 mol de dióxido

Entonces, 8.91 moles necesitarán (8.91 . 1)/2 = 4.46 moles

Convertimos los moles en masa → 4.46 mol . 44g /1mol = 196 g de CO₂

b. Como no tenemos información de los reactivos, trabajamos con el KOH (recorda que siempre hacemos los cálculos con el reactivo limitante).

La relacion estequiometrica también es 2 a 1.

Con 2 moles de KOH producimos 1 mol de agua

Entonces 8.91 moles producirán la mitad, 4.46 moles

Pasamos a gramos  → 4.46 mol . 18g /1mol = 80.2 g de H₂O

N₂ + 3H₂ → 2NH₃

En esta relacion, la relación de moles es 1 a 3.

1 mol de N₂ necesita 3 moles de H₂ para llevar a cabo la reacción

12.75 moles de nitrogeno reaccionarán con (12.75 . 3)/ 1 = 38.25 moles de H₂

La siguiente es una reacción de combustión:

C₃H₈ + 5O₂ → 3 CO₂ + 4 H₂O

Como en este caso tenemos volumen, necesitamos averiguar la densidad del propano para sacar la masa y de ahi los moles:

Densidad del propano es 1.83 g/L

Si tenemos 2 Litros de gas, entonces tendremos el doble de masa

2L .  1.83 g/L = 3.66 g

Convertimos a moles → 3.66 g . 1 mol/44g = 0.083 moles

1 mol de propano produce 3 moles de dióxido.

0.083 moles producirán (0.083 .3) /1 = 0.249 moles

Convertimos a gramos → 0.249 moles . 44g/ 1mol = 10.98 g

La densidad del CO₂ es 1.976 g/L

d = m/V → V = m/d →  10.98 g / 1.976 L = 5.55 L

Answer:

moles Hg = 25.8 / 200.59 = 0.129

atoms = 0.129 x 6.02 x 10^23 =7.74 x 10^22

Moles Zn = 0.0340 / 65.39 =0.000520

atoms = 3.13 x 10^20

work in the same way : divide the mass by the molar mass and multiply by 6.02 x 10^23

Explanation:

The number of atoms in 0.0340g of Zinc (Zn) is 3.148 × 10²⁰ atoms.

HOW TO CALCULATE NUMBER OF ATOMS:

no. of atoms = no. of moles × 6.02 × 10²³

no. of moles = mass ÷ molar mass

no of moles = 0.0340g ÷ 65g/mol

no of moles = 5.23 × 10-⁴mol

no of atoms = 5.23 × 10-⁴ × 6.02 × 10²³

no. of atoms = 5.23 × 6.02 × 10²³-⁴

no of atoms = 31.48 × 10¹⁹

no of atoms = 3.148 × 10²⁰ atoms.

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Answer: A. Catalyst

Explanation:

An catalyst is used to speed up the rate of the reaction. In a biochemical reaction an enzyme is the only catalyst which is exposed to the reactant forming the enzyme substrate or reactant complex thus forming the product. The catalyst increases the product formation from the reactant by increasing the pace of the reaction. Catalyst does not get consumed in the reaction. It can be used repeatedly for multiple reactions.

Answer:

8893.092J

Explanation:

energy= mass × specific heat capacity of water × change in temperature

=32.7×4.184×(77-12)

=8893.092J

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d6

Explanation:

Answer:

what

Explanation:

Answer:

A vascular plant is any one of a number of plants with specialized vascular tissue. The two types of vascular tissue, xylem and phloem, are responsible for moving water, minerals, and the products of photosynthesis throughout the plant.

Explanation:

Answer:

yy

Explanation: