please helpp neep asap ik its late at night but i just need this one page and i can rest ​

The objects which cannot be observed in detail without a microscope

include the following:

A microscope is an instrument which is used to view smaller objects such as

microbe,cells, tissues etc. This instrument is used in viewing the different

cells found in the body as they can't be seen with the eye.

The remaining options which can be seen with the eyes don't require

the use of microscopes.

Read more about Microscope here https://brainly.com/question/25268499

Answer: A) Red Blood cell

B) Dinosaur fossil

D) Snowflake

F) Dust Particle

Explanation:

The enthalpy of this reaction is 1.48 kJ/mol.

The formula to calculate heat energy is

Q = m × c × ΔT

ΔT = T₂ - T₁

ΔT = T₂ - T₁ = 24.70 - 21.00 = 3.70 °C

Q = m × c × ΔT

Q = 191 × 4.184 × 3.70

Q = 2,956.83 J

Q = (2,956.83 ÷ 1,000) kJ

Q = 2.96 kJ

The enthalpy ΔH = Q ÷ n

ΔH = Q ÷ n

ΔH = 2.96 ÷ 2.00

ΔH = 1.48 kJ/mol

Learn more about heat energy here: brainly.com/question/28842664

#SPJ1

Answer:

L=7.0125*10^-5

Explanation:

LET  

 Length of polyethene chain= L

Molecular weight OF polyethene= MW

Molecular weight of monomer =mw

Monomer length= l

L=(MW/mw) *l

              L= (28.05g/mol10^6gmol-1) * 2.5

             L=70.125*10^-6

            L=7.0125*10^-5

Hence, the length will be L=7.0125*10^-5 .

Given that,

we are to find

we know that,

and

Answer:

I'm pretty sure the answer is C.

Answer:

I think its C

Explanation:

Answer:

When a high- and a low-pressure air mass are far apart,  air moves slowly from high to low pressure.

Explanation:

k12

5.Okg is the mass of the solution and we are told that it is 2.4 % NaClO therefore to get the grams of solute present we simply multiple the mass of solution by the percent

5.0 x 2.4% = 12

Answer:

The answer is C

Explanation:

just had this :)

The conclusion that can be drawn from the curves in the energy diagram is the reaction represented by curve B will go faster than curve A reaction. The correct option is C.

An energy diagram is one that shows the transfer of energy or the use of energy. The change in the energy in a chemical reaction is shown by the energy diagram. It is also called a reaction progress curve.

The curve of an energy diagram is shown here, a person is bicycling here, and curve A is higher than curve B. So more amount of energy will be needed for bicycling in curve A, and less amount of energy is needed for curve B.

Thus, the correct option is C, the reaction represented by curve B will go faster than the curve A reaction.

Learn more about the energy diagram, here:

https://brainly.com/question/12867395

#SPJ5

Answer:

oxygen and Carbon dioxide

Answer:

C

Explanation:

Answer:

I think is A

Explanation:

Hope it helps

Ca-41 has 20 electrons

The elements in nature have several types of isotopes

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Calcium is an alkaline earth metal element that is in group 2 and has the atomic number 20

The isotope of Ca-41 :

Number of protons=number of electrons=number of atoms(neutral atom)

\(\tt _{20}^{41}Ca\rightarrow protons=electrons=20, neutrons=41-20=21\)

Taking into account the definition of molarity,  the molarity of the solution is  2 \(\frac{moles}{liter}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case, 26.8 g of ammonium chloride is dissolved in water to make a 0.25 L solution. So you know:

Replacing in the definition of molarity:

\(Molarity=\frac{0.50 moles}{0.25 L}\)

Solving:

Molarity= 2 \(\frac{moles}{liter}\)

Finally, the molarity of the solution is  2 \(\frac{moles}{liter}\).

Learn more about molarity:

brainly.com/question/9324116

brainly.com/question/10608366

brainly.com/question/7429224

The energy of combustion for one mole of butane to be approximately 2888.81 kJ/mol.

To calculate the energy of combustion for one mole of butane (C4H10), we need to use the information provided and apply the principle of calorimetry.

First, we need to convert the mass of the butane sample from grams to moles. The molar mass of butane (C4H10) can be calculated as follows:

C: 12.01 g/mol

H: 1.01 g/mol

Molar mass of C4H10 = (12.01 * 4) + (1.01 * 10) = 58.12 g/mol

Next, we calculate the moles of butane in the sample:

moles of butane = mass of butane sample / molar mass of butane

moles of butane = 0.367 g / 58.12 g/mol ≈ 0.00631 mol

Now, we can calculate the heat released by the combustion of the butane sample using the equation:

q = C * ΔT

where q is the heat released, C is the heat capacity of the calorimeter, and ΔT is the change in temperature.

Given that the heat capacity of the bomb calorimeter is 2.36 kJ/°C and the change in temperature is 7.73 °C, we can substitute these values into the equation:

q = (2.36 kJ/°C) * 7.73 °C = 18.2078 kJ

Since the heat released by the combustion of the butane sample is equal to the heat absorbed by the calorimeter, we can equate this value to the energy of combustion for one mole of butane.

Energy of combustion for one mole of butane = q / moles of butane

Energy of combustion for one mole of butane = 18.2078 kJ / 0.00631 mol ≈ 2888.81 kJ/mol

Therefore, the energy of combustion for one mole of butane is approximately 2888.81 kJ/mol.

In conclusion, by applying the principles of calorimetry and using the given data, we have calculated the energy of combustion for one mole of butane to be approximately 2888.81 kJ/mol.

For more questions on molar mass, click on:

https://brainly.com/question/837939

#SPJ8

The correct valid reason of noncovalent bonds important to function of biomolecules is A).The effect of these weak interactions is cumulative. So,correct option is A.

A noncovalent bond is a kind of synthetic bond, regularly between macromolecules, that doesn't include the sharing of sets of electrons, yet rather includes more scattered varieties of electromagnetic communications. The noncovalent bond is the predominant kind of connection between supermolecules in supermolecular chemistry.[1] Noncovalent bonds are basic in keeping up with the three-layered construction of huge atoms, like proteins and nucleic acids, and are associated with numerous natural cycles where enormous particles dilemma explicitly however fleetingly to each other.

The energy delivered in the development of noncovalent securities is on the request for 1-5 kcal per mol.[2] There are four primary kinds of non-covalent securities: hydrogen holding, ionic collaborations, Van der Waals communications, and hydrophobic bonds.[2] Instances of noncovalent securities include: those limiting connections which hold the two strands DNA in the DNA twofold helix together, those which overlap polypeptides into such optional designs as the alpha helix and the beta conformity, those which empower compounds to tie to their substrate, and those which empower antibodies to tie to their antigen.

Hence,correct option is A.

To know more about noncovalent bonds,visit here:

https://brainly.com/question/14484157

#SPJ4

A  substance can dissolve in another when they have thee same type of intermolecular interaction.

The term solubility of a solute refers to the extent to which a solute dissolve in a solvent. We must know that a substance can dissolve in another when they have thee same type of intermolecular interaction.

Thus;

a) Octane (C8H18) mixes well with CCl4 because they are both non polar substances.

b) Methanol (CH3OH) is mixed with water in all ratios because the both are polar substances.

c) NaBr dissolves very poorly in acetone (CH3 ― CO ― CH3) because acetone is only slightly polar.

Learn more about solubility:https://brainly.com/question/8591226

#SPJ1

Answer:

Protons: 26

Neutrons: 30

Explanation:

Answer:

9.8 × 10^21

Explanation:

Equation of the reaction;

Cd(s) + Ni^2+(aq) ----> Cd^2+(aq) + Ni(s)

E°cell= E°cathode - E°anode

E°cathode= -0.25 V

E°anode = -0.40 V

E°cell= -0.25 - (-0.40)

E°cell = 0.65 V

∆G= -nFE°cell

∆G= -(2 × 96500 × 0.65)

∆G = -125450 J

From;

∆G= -RTlnK

lnK = ∆G/-RT

K= e^∆G/-RT

K= e^-[-(125450/8.314 × 298)]

K= 9.78 × 10^21

The volume of 1.00 lb of mercury metal : 33.352 ml

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\(\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}\)

ρ = density  

m = mass  

v = volume  

Density of metal(mercury) = 13.6 g/ml

mass of mercury : 1 lb = 453,592 g

So the volume :

\(\tt V=\dfrac{453,592~g}{13.6~g/ml}\\\\V=33.352~ml\)

Answer:

+4

Explanation:

Treatment of the ammonium metavanadate with hot hydrochloric acid partly reduces the vanadium to the +4 oxidation state in the form of the VO2+ ion.

In vanadium oxide we increase both sides by 4. And we discover that x is equal to five. The vanadium's oxidation number is + 5.

Loss of electron is called as oxidation. and addition of oxygen molecule is also the oxidation.

When an object comes into touch with oxygen or another oxidizer, a chemical reaction occurs. Rust and the brown color of a sliced apple are both examples of oxidation.

Antoine Lavoisier used the term "oxidation" to describe the reaction of a material with oxygen. The meaning was later expanded to cover additional reactions in which electrons are lost, regardless of whether oxygen was present, after it was realized that the substance loses electrons when it is oxidized.

Thus,  the oxidation number of vanadium in V₂O₅ is + 5.

To, learn more about oxidation refer the link below;

https://brainly.com/question/19761029

#SPJ2

Answer:

gene

Explanation:

DNA is divided into functional units called genes. A gene is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis

Answer:

coding for protein are called exons, and the noncoding regions separating the exons are called introns. Following transcription, these coding sequences must be joined together before the mRNAs can function. The process of removal of the introns and subsequent rejoining of the exons is called RNA splicing.

Explanation:

The source of energy in nuclear power plants is optionD. Fission.

The source of energy in nuclear power plants is nuclear fission. Nuclear fission is the process in which the nucleus of an atom, typically a heavy element like uranium or plutonium, is split into two smaller nuclei, releasing a significant amount of energy in the process. This energy is harnessed to generate heat, which is then used to produce steam and drive turbines connected to generators, ultimately generating electricity.

In a nuclear power plant, controlled fission reactions occur in the reactor core, where nuclear fuel, such as uranium-235 or plutonium-239, is used as the fuel source. When these fuel nuclei undergo fission, they release high amounts of energy in the form of heat and also emit additional neutrons, which can sustain a chain reaction if properly controlled.

It's important to note that fusion (option A) is the process of combining two light atomic nuclei to form a heavier nucleus, which also releases a substantial amount of energy. However, fusion reactions have not yet been fully developed for practical energy generation in power plants.

Alpha decay (option B) is a type of radioactive decay where an atomic nucleus emits an alpha particle. Combustion (option C) refers to the process of burning a fuel in the presence of oxygen, which is not the mechanism utilized in nuclear power plants.The correct answer is d.

Know more about  Fission   here:

https://brainly.com/question/3992688

#SPJ8

Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

Answer:

d

Explanation:did test

Answer:

0.06520959450500399

Explanation:

Answer:

46.0055

Explanation:

The usual enthalpy change for the 200g/7.68 mol of ethyne reaction is C2H6g C2H2g Plus 2H2g - 2,388.5kJ.

The quantity of heat released or absorbed during a reaction occurring at constant pressure is known as the enthalpy change.

H stands for "enthalpy change," Hf for "system final enthalpy" (i.e., the enthalpy of the byproducts of the system in equilibrium in a chemical reaction), and Hi for "system initial enthalpy" (i.e., the entropy for the reactants in a chemical reaction).

To know more about enthalpy visit:

https://brainly.com/question/16720480

#SPJ1

The steps in order that will give rod A positive charge are W,XYZ and WXZY. The correct option to this question is C and D.

The average kinetic energy of the whole sample of atoms increases when there is increase in temperature. The correct option to this question is C.

When the temperature of monotonic gases rises, the kinetic energy of the entire sample of the gas rises in a direct proportion to the temperature at which the sample is moving. We can infer that the temperature increases and has a direct proportional effect on the entire sample of gas. Additionally, kinetic energy rises.

For more information on Kinetic energy of atoms kindly visit visit to

https://brainly.com/question/2948463

#SPJ4