What is 0.151 g in scientific notation

answer : i don’t knowww :)

Right spelling:

Answer: I don’t know. :)

Answer:

V2 = 159.48 mL

Explanation:

Given the following data;

Initial volume = 200 mL

Initial temperature = 28°C

Final temperature = -33°C

To find the final volume, V2, we would use Charles law;

First of all, we would convert the temperature in Celsius to Kelvin.

Mathematically, it is given by the formula;

Kelvin = 273 + C

Substituting into the equation, we have;

Initial temperature, T1:

Kelvin = 273 + 28

Kelvin = 301K

Initial temperature, T1:

Kelvin = 273 - 33

Kelvin = 240K

To find new volume V2, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

[tex] VT = K[/tex]

[tex] \frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}[/tex]

Where;

V1 and V2 represents the initial and final volumes respectively.

T1 and T2 represents the initial and final temperatures respectively.

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Making V2 as the subject formula, we have;

[tex] V_{2}= \frac{V1}{T1} * T_{2}[/tex]

[tex] V_{2}= \frac{200}{301} * 240[/tex]

[tex] V_{2}= 0.6645 * 240 [/tex]

V2 = 159.48 mL

Answer:

1Cu --> 1Cu+2 + 2e

2e +1S-->1S-2

Cu + S --> CuS

Explanation:

Answer:

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Answer: The product and reactant must be balanced

Explanation:

Answer:

Chemical Compound

Explanation:

I'm not sure why but I know it's chemical. Hope this helps!

Answer:

can you show us question 3 pls

Explanation:

Answer:

When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.

Answer: 3.024 g grams of hydrogen are needed to  convert 76 grams of chromium(III) oxide, [tex]Cr_{2}O_{3}[/tex]

Explanation:

The reaction equation for given reaction is as follows.

[tex]Cr_{2}O_{3} + 3H_{2} \rightarrow 2Cr + 3H_{2}O[/tex]

Here, 1 mole of [tex]Cr_{2}O_{3}[/tex] reacts with 3 moles of [tex]H_{2}[/tex].

As mass of chromium (III) oxide is given as 76 g and molar mass of chromium (III) oxide [tex](Cr_{2}O_{3})[/tex] is 152 g/mol.

Number of moles is the mass of substance divided by its molar mass. So, moles of [tex]Cr_{2}O_{3}[/tex] is calculated as follows.

[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{76 g}{152 g/mol}\\= 0.5 mol[/tex]

Now, moles of [tex]H_{2}[/tex].given by 0.5 mol of [tex]Cr_{2}O_{3}[/tex] is calculated as follows.

[tex]0.5 mol Cr_{2}O_{3} \times \frac{3 mol H_{2}}{1 mol Cr_{2}O_{3}}\\= 1.5 mol H_{2}[/tex]

As molar mass of [tex]H_{2}[/tex] is 2.016 g/mol. Therefore, mass of [tex]H_{2}[/tex] is calculated as follows.

[tex]No. of moles = \frac{mass}{molar mass}\\1.5 mol = \frac{mass}{2.016 g/mol}\\mass = 3.024 g[/tex]

Thus, we can conclude that 3.024 g grams of hydrogen are needed to  convert 76 grams of chromium(III) oxide, [tex]Cr_{2}O_{3}[/tex].

Answer:

Freezing T° of solution = - 3.72°C

Boiling T° of solution =  101.02°C

Explanation:

To solve this we apply colligative properties. Firstly, freezing point depression:

ΔT = Kf . m . i

ΔT = Freezing T° of pure solvent - Freezing T° of solution

Kf = Cryoscopic constant, for water is 1.86 °C/m

m = molality (moles of solute in 1kg of solvent)

i = Ions dissolved in solution

Our solute is sucrose, an organic compound so no ions are defined. i = 1.

Let's determine the moles: 68.4 g . 1mol/ 342g = 0.2 moles

molality = 0.2 mol / 0.1kg of water = 2 m

We replace data: ΔT = 1.86°C/m . 2m . 1

Freezing T° of solution = - 3.72°C

Now, we apply elevation of boiling point: ΔT = Kb . m . i

ΔT = Boiling T° of solution - Boiling T° of  pure solvent

Kf = Ebulloscopic constant, for water is 0.512 °C/m

We replace:

Boiling T° of solution - Boiling T° of pure solvent = 0.512 °C/m . 2 . 1

Boiling T° of solution = 0.512 °C/m . 2 . 1 + 100°C → 101.02°C

Answer: aerodynamic force

Explanation:

The time-varying aerodynamic force causes the ball to move erratically. This motion is the source of the "dancing" knuckleball that confuses both batters and catchers alike.

Answer:Acceleration has to do with changing how fast an object is moving If an object is not changing its velocity, then the object is not accelerating.  Anytime an object's velocity is changing, the object is said to be accelerating it has an acceleration.

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option D that is sulfide.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion. Ionic compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The valency of group 2 element is +2 so, the anion that is required to form a compound with these element in a 1:1 ratio must have valency of -2. the only anion in th given option which have -2 valency is sulfide.

Therefore, the correct option is option D that is sulfide.

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My answers are by the way they are written p-phy c-che

D.) endothermic reaction

Answer:

[tex]\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}[/tex]

A. Skin

Explanation:

Skin unlike teeth, bones & shells is fragile & get decomposed easily under the soil.

Answer:

um a I think because when you look at dinosaur you don't see their skin anymore just like the bones and teeth

The molecule represented below is Butane.

looking at the structure give each point represents a carbon atom, placing a C on each point gives you a total of 4, making it to be butane.See picture attached for a vivid illustration of butane.

Lear more about butabe here :https://brainly.com/question/1537939

Answer:

Butane

Explanation:

i just took tha test

Answer: Cu is oxidized while Au is reduced. The oxidizing agent is Au while the reducing agent is Cu

Answer:

Both blanks are "Ag"

(:

Explanation:

Answer:

here is ur ans Lilly

Explanation:

hope it's helpful for you mark brainlest where you from , age

Answer:

[tex]P \approx 225atm[/tex]

Explanation:

From the question we are told that:

Moles of sample n=3.20_mol

Volume V=350mL

Temperature T=300k

Generally the equation for ideal gas is mathematically given by

 [tex]PV=nRT[/tex]

 [tex]P=\frac{nRT}{V}[/tex]

 [tex]P=\frac{3.20*0.08206*300}{350*10^{-3}}[/tex]

 [tex]P=225.079atm[/tex]

 [tex]P \approx 225atm[/tex]

Answer:

2.33M

Explanation:

1. First, make sure the equation is balanced. In this case it would be HNO3+NaOH --> NaNO3 + H2O. (it is already balanced here.)

2. Find the initial volume, final volume, the volume of acid, volume of NaOH.

      a. Initial Volume: 4.85 mL

      b. Final Volume: 43.69

      c. Acid (HNO3) Volume: 5 mL

      d Volume NaOH: Initial V - Final V --> 43.69 mL - 4.85 mL = 38.84 mL NaOH

3. Find moles of NaOH reacted using the volume from D. Convert this volume into Liters. Multiply the volume of NaOH by molarity of NaOH given to you before. (.30 M NaOH)

      a. x mol NaOH/ .03884 L = .30 mol NaOH/ 1 mol = .011652 mol NaOH

4. Now find the moles of acid. The acid given to you in the equation is HNO3. The .011652 mol NaOH is from the moles reacted that you just found. The moles on the right side would be the co-efficient in front of the elements in the equation. Since this equation does not have any coefficients (it's already balanced), it would just be 1.

      a.  .011652 mol NaOH/ x mol HNO3 = 1 mol NaOH/ 1 mol HNO3.

                       x = .011652 mol HNO3

5. Now find the concentration, also known as molarity. Divide the .011652 mol by the volume of acid you have been given (5 mL). Before using 5 mL, divide it by 1000 to get the Liter form.

     a. .011652 mol HNO3/ .005 L = 2.3304 M HNO3

I hope you understand now. God bless!

Answer:

Explanation:

Although stochiometry is very scary loking math it is very easy and and fun to learn.

First Balance the chemical equation (Meaning there are equal amounts of elements at end and begining

Second Convert your units to mols

mols are what allows for stochiometry math to work to know how to find the mols takes practice and knowing when to write the math.

Then from there is just knowing how to go from grams to kg or g to mg and etc

Answer:

m = 16.67 g of Hg

Explanation:

Let's write the overall decomposition reaction that is taking place:

2HgO ---------> 2Hg + O₂

According to the balanced reaction, we can see that the mole ratio between HgO and Hg is the same (2:2 or 1:1), therefore, we can assume that the moles reactants of HgO would be the moles produced of Hg. So, in order to get the grams of mercury, we need to determine the moles first.

To get the moles, we need to use the following expression:

moles = mass / MM   (1)

The molar mass of HgO can be calculated using the atomic weights, which are:

Hg: 200.59 g/mol ; O: 15.999 g/mol

MM HgO = 200.59 + 15.999 = 216.589 g/mol

The moles are:

moles HgO = 18 / 216.589 = 0.0831 moles

As we stated before, moles reactants are the same moles produced, so:

moles HgO = moles Hg = 0.0831 moles of Hg.

Finally, to get the mass, we just solve the mass from (1):

m = moles * MM   (2)

m = 0.0831 * 200.59

Hope this helps

Answer:

Yes, she will be able to recover enough magnesium chloride from the original flask to continue the experiment

Explanation:

The solution prepared by the scientist contains 12.7g of magnesium chloride. The sunlight will evaporate only the water present. When the volume decreases, the magnesium chloride precipitates. When all water evaporates, all the solute, magnesium chloride precipitates totally.

That means she will recover the 12.7g of magnesium chloride.

Answer: Yes, she will be able to recover 12.7g in the flask

Explanation: Founders Educere answer

Answer:

A grassland

Explanation:

Based on the information provided, the ecosystem that is most likely to have a large number of plants that need rich soil and lots of sunlight to grow is a grassland, which is in option A.

The plant in the photo requires rich soil and lots of sunlight to grow. Therefore, the ecosystem that is most likely to have a large number of these plants is the one that meets these requirements. A grassland is an ecosystem that receives a lot of sunlight and has nutrient-rich soil, which makes it a potential habitat for such plants. A taiga, on the other hand, is characterized by cold temperatures and acidic soil, which may not support the growth of plants that need rich soil and sunlight.

Hence, based on the information provided, the ecosystem that is most likely to have a large number of plants that need rich soil and lots of sunlight to grow is a grassland, which is in option A.

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Answer:

1.c 2.j 3.h 4.a 5.d 6. b 7.k 8.e

Explanation:

Answer:

c

Explanation:

took it

Answer:

Tho oil that Syncrude mines from the Athabasca Tar Sands contains large amounts of undesirable sulfur. To remove most of the sulfur, Syncrude uses a chemcial process known as the Claus process, which results in a low-sulfur “sweet” crude oil.

Explanation:i found this online hope it helps

Answer:

no

Explanation: