CHEMISTRY HIGH SCHOOL

90,576 converted to Scientific Notation​

Answers

Answer 1
Answer: =9.0576x10^4 is the answer!

Related Questions

tert-Butyl alcohol is a solvent with a Kf of 9.10 ∘C/m and a freezing point of 25.5 ∘C. When 0.807 g of an unknown colorless liquid was dissolved in 11.6 g of tert-butyl alcohol, the solution froze at 15.3 ∘C.Which of the following is most likely the identity of this unknown liquid?tert-Butyl alcohol is a solvent with a of 9.10 and a freezing point of 25.5 . When 0.807 of an unknown colorless liquid was dissolved in 11.6 of tert-butyl alcohol, the solution froze at 15.3 .Which of the following is most likely the identity of this unknown liquid?ethylene glycol (molar mass = 62.07 g/mol)1-octanol (molar mass = 130.22 g/mol)glycerol (molar mass = 92.09 g/mol)2-pentanone (molar mass = 86.13 g/mol)1-butanol (molar mass = 74.12 g/mol)
What is the theoretical yield of H2O if 130 g of H2O is produced from 18 g of H2 and an excess of O2?
When a system performs work on the surroundings, the work is reported with a negative sign. True of False
The metal wire in an incandescent light bulb glows when the light is switched on and stops glowing when it is switched off. This simple process is which kind of a change?
When a neutral atom undergoes oxidation, the atom’s oxidation state(1) decreases as it gains electrons(2) decreases as it loses electrons(3) increases as it gains electrons(4) increases as it loses electrons

Two basic properties of the solid phase are

Answers

Molecules are packed tightly together. It keeps it shape.

Siobhan wants to measure the mass of a bag of flour. What should she do?

Answers

The most common mistake when people want to measure the mass is they cannot tell the difference between weight and mass.

When you simply put the flour on a normal scale, you're measuring it's weight because it also included the gravitational pull which make the results larger then the original mass.

The measure the mass of the flour she can either :
- Go to and put it on a normal scale in an area with zero gravity
- or she can use some instrument called "balance scale" , in which she can measure the mass from different altitude and compared it

The oxidation number of U in UO2 is Option 1: +2 Option 2: +4 Option 3: +6 Option 4: -2

Answers

Answer: +4

Explanation:

Firstly, we know that Oxygen should have an oxidation number of -2. This is because according to oxidation rules, Oxygen's number will always be -2 unless it is a part of a peroxide and then it will be -1 (ex: H2O2).  UO2 is not a peroxide, so the regular rules will apply.

We also know that oxidation numbers in a molecule with no charge should add up to zero. There are two oxygen molecules which makes their total oxidation numbers equal to -4. Therefore, whatever U's oxidation number is should cancel out that -4 to make the total number 0.

So, U's oxidation number should be +4 since -4+4=0.

Calcium has an atomic number of 20. How many electrons does calcium lose when forming an ionic bond with another ion?a. 1
b. 2
c. 3
d. 4

Answers

2 electrons. it has electron configuration of 2.8.8.2 hence the last 2 will be lost for it to gain stable.
if you need more explanation on periodic table you can reach me at [email protected]

The amount of oxygen formed when 12.26 g of KClO3 is heated is ________.

Answers

Answer:

approximately 4.8 grams of oxygen gas is formed.

Explanation:

To determine the amount of oxygen (O2) formed when 12.26 grams of potassium chlorate (KClO3) is heated, we need to consider the chemical reaction that occurs during this process. When KClO3 is heated, it decomposes into potassium chloride (KCl) and oxygen gas (O2).

The balanced chemical equation for this reaction is:

2 KClO3(s) → 2 KCl(s) + 3 O2(g)

From the equation, we can see that 2 moles of KClO3 produce 3 moles of O2.

Calculate the molar mass of KClO3:

K: 39.10 g/mol

Cl: 35.45 g/mol

O: 16.00 g/mol

Molar mass of KClO3 = (39.10 + 35.45 + 3 * 16.00) g/mol = 122.55 g/mol

Calculate the number of moles of KClO3 in 12.26 grams:

Moles of KClO3 = (12.26 g) / (122.55 g/mol) = 0.1 moles

Now, we can determine the number of moles of O2 produced using the mole ratio from the balanced equation:

Moles of O2 = (0.1 moles of KClO3) * (3 moles of O2 / 2 moles of KClO3) = 0.15 moles

Finally, convert moles of O2 to grams:

Mass of O2 = (0.15 moles) * (32.00 g/mol for O2) = 4.8 grams

So, when 12.26 grams of KClO3 is heated, approximately 4.8 grams of oxygen gas is formed.

The density of aluminum is 2.70 g/cm3. Apiece of aluminum foil that is 1000 cm on each side has a mass of 440. mg. How thick is the piece of foil?

Answers

mass/volume = density
mass = (440 mg)*(1g)/(1000mg) = 0.440g
volume = (1000cm)(1000cm)(t)
where t = thickness
density = 2.70 g/cm^3 = (0.440g)/((1000cm)(1000cm)(t))

multiply both sides by 't' and divide both sides by (2.70g/cm^3)

t = (0.440) / ((1000cm)(1000cm)(2.70)) = 1.629x10^-7 cm

t = (1.629 x 10^-7 cm)*(1000000 micrometers)/(1 cm) = 0.1629 micrometers

Answer is t = 0.1629 micrometers
Other Questions
Gases, fluids, and other solids in contact with a moving object will produce ____ due to friction. heat flow current electrical energy radiation
How are elliptical galaxies different from spiral galaxies?a. They contain older stars and less gas and dust.b. They contain younger stars and more gas and dust.c. They are bigger than spiral galaxies.d. They are smaller than spiral galaxies.
A hydrocarbon is said to be saturated if: A)           one end of the molecule is hydrophilic while the other end is hydrophobic.                 B)            it has one or more double bonds between carbon atoms.                 C)            it contains more than one functional group.                 D)           each internal carbon atom is covalently bonded to two hydrogen atoms.                E)            its functional groups include at least one aromatic ring.
Mark and Ann took a two week hiking trip through Yosemite National Park. While hiking through the park they witnessed two large blocks of rock break away from Glacier Point. What is the initial transfer of energy that accelerates the rock down the side of the mountain?