For a research project on time management, Yuri needs to calculate how many hours the average high school student spends in school each year. Which of these dimensional analysis equations is the correct one for him to use?

Answer:

The core of the earth is made of iron-nickel alloys.

The number of moles of the gas present is 4 moles.

To calculate the numbers of moles of the gas present, we use the formula below.

Formula:

Where:

Make n the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the number of moles of the gas present is 4 moles.

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The force of  friction acting on the block is -2N.

To find the force of a friction, the given datas are,

Force = 6N

Mass = 1 kg

Acceleration = 4 m/s².

The push or pull on an object that made the changes in the velocity with the mass. The object's or body's is to be at motion or at rest will be determined by Force. It has both the magnitude and direction.

The Net Force of the object can be written by:

Fnet = ma

where m is the mass of the object in kg

a is the acceleration of the object in m/s^2

Substituting the values in the formula,

Fnet = (1.0)(4.0)

        = 4 N

We also know that Net force is also the sum of all forces acting on an object. In this case Friction and the Pushing Force is acting on the object. Hence we can write that:

Fnet = Pushing Force + (-Friction)

6N = 4 N - Friction

Friction = - 2N

Hence the force of friction is -2 N.

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Answer:

1.02 10 to the 23 power(or 100,000,000,000,000,000,000,000)

atoms of AL

Explanation:

ive had this question before

Answer:

The rate of solvation is depends on temperature and surface area. Increasing the temperature of the solvent increases the rate of solvation. Increasing the surface area of the solute increases the rate of solvation. Also, agitating the system increases the rate of solvation.

Explanation:

hope this helps.

Answer:

This tells you that when 1 mole of propane undergoes combustion, 3 moles of carbon dioxide are produced. You can thus say that when 2.0 moles of propane react, you will get 2.0moles C3H8 ⋅ 3.moles CO2 1mole C3H8 = 6.0 moles CO2

Explanation:

The correct manipulation of the ideal gas equation as shown here is (PV)/R=nT.

According to the ideal gas law; PV = nRT. Now, this law applies to gases at high temperature and low pressure.

Given this fact, we know that the correct manipulation of the ideal gas equation as shown here is (PV)/R=nT.

Missing parts;

Which is an example of an accurate manipulation of the Ideal Gas Law and explain why?

(PV)/R=nT 1

PV=(nT)/R 2

PV=(RT)/n 3

PV=(nR)/T 4

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Answer:

B

Explanation:

Water gives more energy to the hurricane, so it would stay as one. If the hurricane hits the land, it will start getting smaller till it disappears.

Answer:

electron orbitals (okay nayn manghula kana Lng)

This part is just telling you what they mean by hallowed be Your name is

Hope this helps :))

Answer:

Gypsum and Selenite have the same chemical composition but differ in crystallisation habit. Selenite is usually crystalline and the association of the impurities is superficial which are eliminated by washing. Gypsum is fine grained in nature and is beneficiated by flotation only.

Explanation:

here's the link to your answer

btly. 55/7

Answer:

Middle

Explanation:

Transition metals are located in the middle of the Periodic table from group 3 to group 11.

Hope this helped!

- profparis

Answer: 6.97 g

Explanation:

Grams of potassium sulfate must be added to make 200. mL of a 0.200 M potassium sulfate solution are 6.96.

Molarity of a given solution is known as the total number of moles of solute per litre of the solution.  A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.

Molarity = (No. of moles of solute ÷ Volume of solution in liters)

The unit of molarity is mol L⁻¹.

Molarity is temperature dependent because as temperature changes, volume of the solution also changes.

No. of moles of solute = 0.04

Mass of potassium sulfate = 174.2 × 0.04

Mass of potassium sulfate = 6.96 grams

Therefore, Grams of potassium sulfate must be added to make 200. mL of a 0.200 M potassium sulfate solution are 6.96.

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Answer:

[tex]2.686*10^{24}[/tex]

Explanation:

Avogadro's number, 10 x 10^{23}, represens the number of atoms in a single mole of any substance.

Since we already of have the mole amount and don't need to calculate that from the grams of the substance, we can simply multiple Avogadro's number by the amount of moles given.

[tex]4.46 *(6.022*10^{23}) = 2.686 * 10^{24}[/tex]

Answer:

I used to know this stuff but I don't remember it anymore

Answer:

No. of moles = no. of given molecules/NA

No. of moles = 8.3 × 10^23 / 6.023 × 10^23

= 1.3780 moles

Explanation:

Answer:

.96875 moles

Explanation:

22.4 liters per mole at STP for a gas

21.7 / 22.4 = .96875 moles

Answer:

I multiply 97.21 by the amount of cookies you have.

Explanation:

i dont know if this is correct but i multiplyed it by two and got 194.42

Based on the concentrations given, the volume of vinegar required is 5.04 mL.

The concentration of a solution is the amount of solute in a given volume of solution.

Concentration can be expressed as:

The concentration of the vinegar solution is 4.76% (w/w). This means that 4.76 g of vinegar is present in 100 g of solution.

Mass of vinegar = 4.76 g

molar mass if vinegar = 60 g/mol

moles of vinegar = 4.76/60 = 0.0793 moles

volume of solution/water = 100 mL or 0.1 L

Molarity of vinegar = 0.0793/0.1 = 0.793 M

1 mole of vinegar reacts with 1 mole of NaOH

let the volume of vinegar required be V

0.793 M × V = 40 × 0.1

V = 4/0.793

V = 5.04 mL

Therefore, the volume of vinegar require is 5.04 mL.

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Answer:

See the attached images for solution.

Explanation:

Answer:

No

as they are dispensed, during use, and as they are discarded

Explanation:

Suppose you spill a few drops of sulfuric acid solution on your sleeve, but there is no visible harm.

Can you be confident the fabric is safe?

No

The best way to protect yourself from such mishaps is to be mindful of the acid and base solutions

as they are dispensed, during use, and as they are discarded

Answer:

The direction of the force vector depends on the sign of the charges. If the charges are the same, the force points away from the other charge.

Explanation:

weight of dissolving KOH is=10 g KOH molecular weight is= 56.1 moles

Have a nice day!

the conditions on the moon are most likely bumpy

Answer: the answer is letter c which is 1 percent

Explanation:

Answer:

radiation takes place with energy between a heat source and an object

Explanation:

g o o g l e

Answer:

In experiments, a researcher or a scientist aims to understand the effect that an independent variable has on a dependent variable. Control variables help ensure that the experiment results are fair, unskewed, and not caused by your experimental manipulation.

Explanation:

I hope this helps out.