Which electromagnetic wave does the student replace the question mark with in the table?
A
radio waves
B
gamma rays
C
infrared waves
D
visible light waves

Answer: 78.9 moles

Explanation:

4.75 x 10^25 molecules (1 mole / 6.02 x 10^23 molecules) = 78.9 moles :)

Answer:650 mL

Explanation:

Remember that Molarity = mol/L. Rearranging the equation to solve for liters you get L = mol/Molarity.

80x10-3 mol / 12x10-2 M = 6.5x10-1 L

6.5x10-1 L (1x103) = 6.5x10 2 mL = 650mL

Neutralization reaction is the reaction that occur between acid and base.

Neutralization reaction is the reaction that take place between acid and base to produce salt and water. For examples HCl react with NaOH to produce NaCl and H2O

Therefore, Neutralization reaction is the reaction between acid and base.

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Answer:

they include pretty aurora as well as hazards

Mark the lime poor conducter of heat and electricity.

Yes why no ,Xenon is already has its secured place in modern periodic table.

Xenon is a non-reactive gas. It will not conduct and react normally. Thus it can be classified as a non-metal. Xenon is placed in the inert gas or noble gas group that is group 18.

Noble gases are inert gases in the 18th group of periodic table. Noble gases have completely filled orbitals and thus they no need other electrons.

Atoms participate in reaction when they are not stable because of the insufficient valence electrons. Noble gases such as argon, krypton, neon, xenon etc. have 8 valence electrons and thus are not reactive.

Metals are highly conductive and they are placed in the left side of periodic table. In periodic table, from left to right the metallic nature decreases and the other elements are called non-metals. Most of the non-metals are gases and very few such as silicon is metalloid.

Non-metals are insulators or poorly conduct electricity. Hence, xenon is a non-metal placed in the 18th group of periodic table.

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Answer:

The bond strength of an acid generally depends on the size of the 'A' atom: the smaller the 'A' atom, the stronger the H-A bond. When going down a row in the Periodic Table (see figure below), the atoms get larger so the strength of the bonds get weaker, which means the acids get stronger.

Explanation:

The acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.

Strong acids are completely dissociated into a solution.

Examples of strong acids are Hydrochloric acid, sulfuric acid, nitric acid, etc.

Weak acids are those that do not completely dissociate in a solution.

Examples are formic acid, acetic acid, nitrous acid, etc.

Thus, the acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.

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Answer:

stuff around the earth

Explanation:

like water,fire,wind,and earth/plants

Answer:

really its tought or we can say confusing

°__°

Answer:

a

Explanation:

it will help stop frictoin

A 120g block of pinewood has a volume of 300cm3. Would this block float on water? (HINT: Water has a density of 1g/cm3). a. No, because the block is denser than water.

Also here's a free meme

The density of a material represents the denseness of that material in a specific given area. If an object has a density less than water then it will float on water otherwise it will sink. Here the wood will float on water.

The density of a material denotes the measurement which compares the amount of matter an object has to its volume. An object with more matter in a certain volume has a high density. It is defined as the mass per unit volume.

The density is usually represented by symbol ρ or by the letter D. The formula used to calculate the density is:

Density = Mass / Volume

D = 100 / 300 = 0.33 g/cm³

Here the density of water is 1.0 g/cm³ which is greater than the density of  pine wood. So the pine wood will float on water.

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Answer:

15.055 X 1023 atoms

Explanation:

hope clear

Answer:

Battery

Explanation:

The battery supplies the electricity needed for the circuit to work.

For an object  1 m long with a 5 m ramp, You pull with 20 N of force, The weight of the object is mathematically given as

W= 5714.3 N

Generally, the equation for the weight   is mathematically given as

W = mg = F/Sinθ

W= 20/Sin0.2

W=20/ 0.0035

W= 5714.3 N

In conclusion, the weight of the object

W= 5714.3 N

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Answer:

Your answers would be:

-impression fossils

-trace fossils

-replacement fossils

Explanation:

Have a great rest of your day
#TheWizzer

Answer:

The are id-k- I dont know much on fossials. But did you know that thunder is lighting. I say this because thunder is just the noise lighting makes. We see the light firts because light travels faster than sound.

Explanation:

Hope This Helps

Have A Great Day

~Zero~

The mass of sulfurous acid produced when 245g of sulfur dioxide is reacted with water is 313.8 g

From the question, we are to determine the mass of sulfurous acid produced

First, we will write the balaced chemical equation for the reaction

H₂O + SO₂ → H₂SO₃

This means 1 mole of H₂O reacts with 1 mole of sulfur dioxide (SO₂) to produce 1 mole of sulfurous acid (H₂SO₃)

Now, we will determine the number of moles of sulfur dioxide present

Mass of sulfur dioxide present = 245 g

Molar mass of sulfur dioxide = 64.066 g/mol

Using the formula,

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

Then,

Number of moles of SO₂ present = [tex]\frac{245}{64.066}[/tex]

Number of moles of SO₂ present = 3.824 moles

This is the number of moles of SO₂ present

From balanced chemical equation

1 mole of H₂O reacts with 1 mole of sulfur dioxide (SO₂) to produce 1 mole of sulfurous acid (H₂SO₃)

Then,

Water (H₂O) will react with the 3.824 moles of sulfur dioxide (SO₂) to produce 3.824 moles of sulfurous acid (H₂SO₃)

∴ The number of moles of sulfurous acid produced is 3.824 moles

Now, for the mass of sulfurous acid produced

Molar mass of sulfurous acid = 82.07 g/mole

Using the formula,

Mass = Number of moles × Molar mass

Mass of sulfurous acid produced = 3.824 × 82.07

Mass of sulfurous acid produced = 313.8 g

Hence, the mass of sulfurous acid produced is 313.8 g

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Answer:

Medication

Explanation:

These pharmaceuticals can pollute our water and unintentionally expose us to the chemicals in these medications. Recent studies have found that medicines flushed down the drain can contaminate our lakes and streams, which can hurt fish and other aquatic wildlife, and end up in our drinking water.

Answer:

Its because Hitler thought that there beliefs were trasha dn thought that these humans were worthless so he went out of his way to "DEHUMANIZE" them.

Explanation:

Answer:

Current randomly flows around the circuitt

Answer:

B. Current always follows the path of least resistance.

Explanation:

A short circuit occurs when the current finds a way to bypass the appliance on a path that has little or no resistance. When one path through the circuit has 0 resistance (a short circuit), current follows the path of least resistance only.

Given the data from the question, the reading (i.e pressure) of the altimeter in psi is 9.57 psi

1 inHg = 0.491 psi

The pressure of the altimeter in psi can be obtained as illustrated below:

1 inHg = 0.491 psi

Therefore,

19.50 inHg = 19.50 × 0.491

19.50 inHg = 9.57 psi

Thus, 19.50 inHg is equivalent to 9.57 psi

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Answer:

Lithium has high melting and boiling point due to its small size, due to which it possesses high ionisation energy. As a result the binding energy in its crystal lattice is very high. This is why lithium has high melting and boiling point.

Explanation:

I HOPE IT HELPS! THANX!!

STAY SAFE!!!

Answer:

Refer to explanation

Explanation:

Weather is the main cause behind most short term environmental changes

For example, a period of heavy rain may lead to a pond overflowing, and flooding the nearby shrubbery

Animals in the area would adapt to this by trying to keep away from the flooded area until it dries out, once the rain ends

Answer:

the second one

Explanation:

Answer: polar molocule

Explanation:

291.15 Kelvin

I hope this helps

Answer:

18 degrees Celsius = 291.15 Kelvin

Explanation:

The formula for finding Kelvin through Celsius is by adding 273.15 to the Celsius. In this case, it is 18 + 273.15 = 291.15

:)

Based in the equation of the reaction, oxygen gas, O2 is the limiting reactant and 2 moles of CO remain unreacted

The reaction of carbon(ii) oxide, CO and oxygen, O2 is a redox reaction which produces carbon (iv) oxide, CO2.

The equation of the reaction. is given below:

From the equation of the reaction, 2 moles of CO are required to react with 1 mole of O2 to produce 2 moles of CO2

The moles of the reacting substances is calculated using the formula:

Molar mass of CO = 28 g

Moles of CO = 112/28 = 4 moles

Molar mass of 02 = 32 g

Moles of O2 = 32/32 = 1 mole

Therefore, oxygen gas, O2 is the limiting reactant and 2 moles of CO remain unreacted.

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Even a small increase can have devastating effects on coastal habitats farther inland, it can cause destructive erosion, wetland flooding, aquifer and agricultural soil contamination with salt, and lost habitat for fish, birds, and plants.

Explanation:

I hope this helps

Answer:

Explanation:

To find the molarity, we have an equation: moles ÷ liter.

To find the moles of NaF, take the gram ÷ molar mass of NaF

7.13/42.0 = 0.170 moles of NaF

201 ml ÷ 1000 = 0.201L