air hockey is a game that you play on the specially-designed table each player tries to slide a pug cross the table into a go using mileage the table has tiny holes that create cushion of air that lives the focus more distance about the playing surface the cushion of air increases the speed of the puck because it's......mm​

Answer:

cool

Explanation:

Answer:

Carbon Trioxide

Explanation:

Its a Carbonite Ion which is also known as a polyatomic ion

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

Given mass of melatonin = 0.01 g

Molar mass of melatonin [tex](C_{13}H_{16}N_2O_2)[/tex] = 232.28 g/mol

[tex]\text{Number of moles of melatonin}=\frac{0.01 g}{232.28g/mol}=0.000043mol[/tex]

Thus the moles of melatonin in 0.01 g are 0.000043

Answer:

1.5 m/s²

Explanation:

From the diagram,

F-F' = ma............... Equation 1

Where F = Forward force of the vehicle, F' = Frictional force, m = mass of the electric car, a = acceleration of the car.

make a the subject of the equation

a = (F-F')/m........... Equation2

Given: F = 3500 N, F' = 500 N, m = 2000 kg

Substitute into equation 2

a = (3500-500)/2000

a = 3000/2000

a = 1.5 m/s²

Answer:

B!

Explanation:

Answer:

i know im late but i just really want the points. the answer is b.

Explanation:

Answer:

The answer is "It leads to the formation of underground caves"

Explanation:

Texas Hill Land is popular for its rolling hills, good wine, and authentic food. Its Texas Hill Property appeal is no mystery, recognized as being one of the top vacation destinations in the World. Texas Hill Structure is primarily mostly of weak calcareous stone. Calcium may worsen or degrade if exposed to carbon dioxide in rainwater. This practice affects the land of the Texas smoky Mountains leading to the formation of underwater groves.

Answer:

a ground state electron jumps to a higher energy level

Answer:

Explanation: A foam forms when bubbles of a gas are trapped in a liquid or solid. In this case oxygen is generated when hydrogen peroxide breaks down into oxygen and water on contact with catalase, an enzyme found in liver. Enzymes are special protein molecules that speed up chemical reactions.

Answer:

FFe

2

O

3

(

s

)

+

3

CO

(

g

)

→

2

Fe

(

s

)

+

3

CO

2

(

g

Explanation:

Answer:

D. Thermal

Thermal is another energy the match gives off

Answer:Air in high pressure systems moves in an anticlockwise direction (in the southern hemisphere), while air in low pressure systems moves in a clockwise direction due to the rotation of the Earth. At the surface of the Earth air flows from high pressure systems into low pressure systems.

Explanation:

Warm air rises, creating a low pressure zone; cool air sinks, creating a high pressure zone. Air that moves horizontally between high and low pressure zones makes wind.Smaller pressure systems create localized winds that affect the weather and climate of a local area.

Answer:

2H2(g]+O2(g]→2H2O(l]]. Notice that the reaction requires 2 moles of hydrogen gas and 1

Explanation:

Answer:

they move closer to each other

Answer:

They move closer to each other

Explanation:

Got it right on the test

Hope this helps :)

Answer:

A. The 100 mL of water would be a higher temperature than the 1,000 mL of water.

Explanation:

Since the volume of water affects temperature, when the volume increases this results in a lower temperature. This means that the water with the smaller volume will have a higher temperature.

Answer: .84kg

Explanation:

Khan academy

A box slides with an initial speed of 4.0 kg m/s towards a spring on a frictionless horizontal surface. When the box hits a spring with spring constant k = 150 N/m, the spring compresses by 0.30 m.

What is the mass of the box?

Answer: 0.54 kg

Answer:

The pool float looked would have looked deflated the next morning.

Explanation:

When temperature decreases the volume decreases

Answer:

The pool float most likely looked a little deflated or pushed in

Explanation:

The pool float most likely looked a little deflated or pushed in. This is because during the night temperatures most likely dropped. These cold temperatures during the night would have caused the air molecules inside the pool float to come closer together which would cause there to be more excess space inside the pool float. Therefore, allowing it to collapse into itself. This would be far worse if the float was filled with helium or another gas other than O2.

Answer:

44.9g

Explanation:

You have to convert grams of CH4 to moles, use the mole-to-mole ratio of CH4 to water, and convert back to grams.

(20.0g CH4)(1 mol CH4/16.04g)(2 mol H2O/1 mol CH4)(18.01 g H2O/ 1 mol) = 44.9127 g

Hope this helps!

Answer:

Physical i think, because it says, "The shoes are green, made of cotton, and rubber sole" everything in the passage described a physical property

Explanation:

tell me if im wrong, good luck

Answer:

physical

Explanation:

its listing a size 8, which eliminates chemical and mechanical. Also it lists their green, which eliminates structural, leaving physical left

Answer:The answer is 63.546.

Explanation: The answer is 63.546. We assume you are converting between grams Copper and mole. You can view more details on each measurement unit: molecular weight of Copper or mol. The molecular formula for Copper is Cu. The SI base unit for amount of substance is the mole. 1 grams Copper is equal to 0.015736631731344 mole

Answer:

5.64 of copper

Explanation:

Given: 564 grams of copper

To find: in copper

Solution: If 1 grams Copper = 0.01 mole,

Then, 564 grams = multiply 564 and 0.01 mole

564 × 0.01 = 5.64

Therefore, there are 5.64 of copper in 564 grams

Answer:

Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0

Explanation:

I had the same question on one of my assignments earlier

Answer:

MgO

is the correct answer

hope it helps

Explanation:

30 to the second power

Answer:

2.72g

Explanation:

The balanced equation of this reaction is given as follows:

Na2O + H20 --> 2NaOH

Based on this balanced equation, 1 mole of Na2O will produce 2 moles of NaOH.

First, we need to convert mass of Na2O into moles by using the formula;

mole = mass/molar mass

Molar mass of Na2O = 23(2) + 16

= 46 + 16

= 62g/mol

mole = 2.1g/62g/mol

mole of Na2O = 0.034mol

Hence, if 1 mole of Na2O will produce 2 moles of NaOH.

Then, 0.034mol of Na2O will produce (0.034 × 2) = 0.068mol of NaOH.

To convert mole of NaOH to mass, we use;

mole = mass/molar mass

Molar mass of NaOH = 23 + 16 + 1 = 40g/mol

0.068 = mass/40

mass of NaOH produced = 2.72g.

Answer:

Volume of 6.5 moles of Helium at STP is 145.6954 L

Explanation:

As we know

[tex]pV = nRT[/tex]

At STP, temperature is  273.15 K  and pressure is  1 atm

n is the number of moles which is equal to 6.5

R is the gas constant = 0.08206 L atm/K mol

Substituting the given values in above equation, we get -

[tex]1 * V = 6.5 * 0.08206 * 273.15\\V = 145.6954[/tex]Liters

Volume of 6.5 moles of Helium at STP is 145.6954 L

Answer:

1 and 3

Explanation:

oh this one lol,, hope it helps

Answer:

1 and 3

Explanation:

hope this helps :)

Answer:

564.5027395 moles

Explanation.

a mole is 6.023×1023

(3.4×10^26)÷(6.023×10^23)= 564.5027395