6a) What would the DIGITS (with the decimal) of 0039283 be in scientific notation?

Answer:

i think 70inches

Explanation:

Maximum wavelength of light capable of dissociating the f-f bond is 7.6245 nm.

Wavelength related to bond dissociation energy is calculated by first calculating the energy required to break one f-f bond which is calculated as,

energy required to break a bond=bond energy/Avogadro's number

In this case which is equal to,157×10³/6.022×10²³=2.6071×10[tex]^-19[/tex] J.

Now to calculate wavelength, Planck's equation is used which is,

E=hc/λ

∴λ=6.626×10[tex]^-34[/tex]×3×10⁸/2.6071×10[tex]^-19[/tex]

=7.6245×10[tex]^-7[/tex] m or 7.6245 nm

Thus, the maximum wavelength of light capable of dissociating the f-f bond in one molecule of fluorine is 7.6245 nm.

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Answer:

The third option "A molecule of a compound is composed of at least two types of atoms" is correct

Explanation:

This question isn't about molecules, it's about elements and compounds.

Elements are made of one and only one type of atoms, while compounds are made of more than one type of atoms.

(Molecules are just groups of atoms, it doesn't matter what they're made of)

Answer:

a

Explanation:

Answer:

d

Explanation:

it's the only one that seems to make sense

Answer:

There are 5.69*10²⁴ molecules in 9.45 moles.

Explanation:

The mole is defined as the amount of matter that particles have, that is, atoms and elementary entities.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and represents a quantity without an associated physical dimension. Avogadro's number applies to any substance.

Then the following rule of three can be applied: if 1 mole contains 6.023 * 10²³ molecules, 9.45 moles, how many molecules will it have?

[tex]amount of molecules=\frac{9.45 moles*6.023*10^{23}molecules }{1 mole}[/tex]

Solving:

amount of molecules= 5.69*10²⁴⁴ molecules

There are 5.69*10²⁴ molecules in 9.45 moles.

Answer:

its valency must be 3

hope it helps.

Answer: -3

Explanation: an element with atomic number of 15 is Phosphorus the Electronic configuration of phosphorous is 2, 8, 5. It has 5 electrons in its last orbit which can be completely filled by accepting 3 electrons.

Answer:

1. 6electrons because in an a neutral atom, the number of electrons and protons are equal

2. Atomic number is 10

3. 15electrons, Atomic number 15,Mass number 32

4. 7protons, Atomic number 7

1. 15protons,16neutrons

2.Number of protons is 9, atomic number is 9

3.Number of protons is 27, Atomic number is 27

Explanation:

The mass number (A)=Atomic/proton number (Z)+Neutron number (N)

Answer:

I'm pretty sure it's NaOH

Explanation:

I hope this helps :D

Answer:

23 moles Oxygen × 6.02 × 1023 atoms = 1.3846 × 1025 atoms Oxygen.

Explanation:

Answer:

Answer: A. 3 mol  3 mol Al:

Explanation:

Te given balanced chemical equation is :

According to the stochiometry :

A: 3 mol  3 mol Al:

3 moles of chlorine reacts with 2 moles of aluminium

B. 2 mol  3 mol :

2 moles of aluminium  reacts with 3 moles of chlorine

C.  2 mol  2 mol Al

2 mol of aluminium produces 2 mol of  

D. 3 mol  2 mol  

3 moles of chlorine produces with 2 moles of  

Thus the conversion factor not used for mole to mole calculations is  3 mol  3 mol Al:

Explanation:

Answer:

Formula mass in daltons of the chemical component.

Answer:

Explanation:

To calculate oxidation numbers of elements in the chemical compound, enter it's formula and click 'Calculate' (for example: Ca2+, HF2^-, Fe4 [Fe (CN)6]3, NH4NO3, so42-, ch3cooh, cuso4*5h2o). The oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds.

The block of iron metal with a density of 7.87 g/mL has a volume in mL of 0.2414 mL

The density formula and the procedure we will use is:

ρ = m/v

Where:

Information about the problem:

Applying the density formula and clearing the volume (v), we get:

ρ = m/v

v = m / ρ

v = 1.90 g / 7.87 g/ mL

v = 0.2414 mL

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Answer:

SAMPLE A - pure substance.

SAMPLE B - homogeneous mixture.

SAMPLE C - heterogeneous mixture.

Explanation:

Answer:

pure substance.

homogeneous mixture.

heterogeneous mixture.

Explanation:

Answer:

Yes adrenaline is radioactive.

Explanation:

Answer:

1 mole is equal to 1 moles Tungsten, or 183.84 grams. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between moles Tungsten and gram.

Explanation:

Answer:

Molar mass = 105 g/mol

Explanation:

Given data:

Mass of gas = 3.15 g

Pressure = 785 mmHg

Temperature = 20°C

Volume of gas = 750 mL

Molar mass of gas = ?

Solution:

Pressure = 785 mmHg (785/760 = 1 atm)

Temperature = 20°C (20+273 = 293 K)

Volume of gas = 750 mL (750 mL× 1 L/1000 mL = 0.75 L)

PV = nRT

R = general gas constant (0.0821 atm.L/mol.K)

1 atm× 0.75 L =  n×0.0821 atm.L/mol.K × 293 K)

0.75 atm.L = n× 24.06 atm.L/mol

n = 0.75 atm.L / 24.06 atm.L/mol

n = 0.03 mol

Molar mass of gas:

Molar mass = Mass / number of moles

Molar mass = 3.15 g/ 0.03 mol

Molar mass = 105 g/mol

Answer:

TRUE

Explanation:

Gina is trying to reduce the number of indoor pollutants in her home. Indoor pollutants include pet hair and dust, which are (c) allergens and radon and carbon monoxide, which are (a) gases.

Allergens are the substances that trigger the immune system of an organism and also produce allergic effects. Allergens can induce symptoms like: redness, itching, sneezing, coughing, etc. The examples of allergens are pollens, certain microbes, dust, pet hair, etc.

Radon is a highly poisonous and radioactive gas present in the environment. It is one of the major causes for lung cancer. It is inert and colorless in nature. Radon is present in environment due to decay of uranium which is present in soil naturally.

The question is incomplete, the complete question is:

Gina is trying to reduce the number of indoor pollutants in her home. Indoor pollutants include
A- pet hair and dust, which are:
(a) gases, (b) smoke, (c) allergens, (d) smog; and
B- radon and carbon monoxide, which are:
(a) gases, (b) smog, (c) allergens, (d) smoke.

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A safety data sheet is informational data that states the properties of the various chemicals. According to the SDS of NaOH, it causes irritation, nausea, eye burn, burns in the digestive system, etc.

SDS is abbreviated for a safety data sheet which is a document that provides information on the chemicals including the properties, health hazards, measures, safety, prevention, etc.

According to SDS, NaOH results in various potential acute health effects including vomiting, diarrhea, nausea, irritation, etc. The chronic effect includes coma, burns in the eye, respiratory infection, digestive system, dermatitis, etc.

Therefore, sodium hydroxide has various acute and chronic health effects.

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Your question is incomplete, but most probably your full question was, Use the internet to look up the sds for 2.0 m sodium hydroxide, NaOH, to answer the following question: list the potential acute and chronic health effects.

Answer:

protons and neutrons

Explanation:

The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge

Answer:

Yeast cells

Explanation:

Answer:

C proton hope it helps <3

Explanation:

Answer:

(1)  LiCl + CaBr2 → CaCl2 + LiBr

     Balanced

    2LiCl + CaBr2 → CaCl2 + 2LiBr

(2) Cr(OH)3 + Na2CO3 → NaOH + Cr2(CO3)3

     Balanced

     2Cr(OH)3 + 3Na2CO3 → 6NaOH + Cr2(CO3)3

(3)   Sr3N2 + KClO3 → Sr(ClO3)2 + K3N

      Balanced

      Sr3N2 + 6KClO3 → 3Sr(ClO3)2 + 2K3N

(4) Fe(NO3)2 + AlPO4 → Fe3(PO4)2 + Al(NO3)3

     Balanced

      3Fe(NO3)2 + 2AlPO4 → Fe3(PO4)2 + 2Al(NO3)3

(5) CuSO4 + AgNO3 →  Ag2SO4 + Cu(NO3)2

     Balanced

     CuSO4 + 2AgNO3 →  Ag2SO4 + Cu(NO3)2

(6)   HCl + Ba(OH)2 → H2O + BaCl2

      Balanced

       2HCl + Ba(OH)2 → 2H2O + BaCl2

(7) CsCN + SnF4 → CsF + Sn(CN)4

    Balanced

  4CsCN + SnF4 → 4CsF + Sn(CN)4

(8) (NH4)2S + Mg(NO3)2 →  MgS + NH4NO3

     Balanced    

     (NH4)2S + Mg(NO3)2  → MgS + 2NH4NO3

(9) Na2CrO4 + Mo(OH)3 → NaOH + Mo2(CrO4)3

    Balanced

    3Na2CrO4 + 2Mo(OH)3 → 6NaOH + Mo2(CrO4)3  

(10) Ni(C2H3O2)2 + H3PO4 → Ni3(PO4)2 + C2H4O2

      Balanced

     3Ni(C2H3O2)2 + 2H3PO4 → Ni3(PO4)2 + 6C2H4O2

Answer:

It is false.

Explanation:

Weathering is the general process by which rocks are broken down at Earth's surface. Erosion is a set of processes that loosen and move soil and rock downhill or downwind. Umm...for example, imagine you are having ice cream in your hand out on a sunny day, if the ice-cream melts and falls down, it is called erosion and if the ice-cream melts but it doesn't fall down, it called weathering.

Answer:

A

Explanation:

kinetic and mass are directly proportional

so if one increases the other does to

The relationship between the kinetic energy of an object and the mass of an object is Kinetic energy gets bigger at the same rate as the mass of an object.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body keeps the kinetic energy it acquired throughout its acceleration unless its speed changes.

Potential energy can be moved into motion by a variety of catalysts, including gravity and chemical reactions, to release kinetic energy. As a result, kinetic energy rises and potential energy falls. Mechanical energy is the sum of all kinetic and potential energy.

The capacity to perform work is arguably the most significant characteristic of kinetic energy. Force acting on an object while it is moving is referred to as work. Energy and work are interchangeable because of their tight relationship.

Thus, option A is correct.

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