Two identical sister chromatids are held together at what
region on a duplicated chromosome?
a Chromatin
b Centromere
C Centriole
Check it

Answer:

Diagram A: Balanced Forces

These forces are balanced, so the motion of the object stays the same. The object in the diagram could be sitting still, or it could be moving. But its motion is not changing. This is because the forces acting on it from opposite sides are exactly the same size.

Explanation:

Answer:

Because a balanced force can keep an object moving at a constant velocity.

Explanation:

molar mass of potassium is 39.0983 g/Mol

using conversion factors

0.82 Mol K (39.0983 g/ 1 mol)

mol cancels out, leaves you w grams

answer: 32.1 grams K

Answer:

Option B. 0.5 N.

Explanation:

Data obtained from the question include:

Mass (m) = 1 Kg

Acceleration (a) = 0.5 m/s²

Force (F) =?

Force is defined as the product of mass (m) and acceleration (a). Mathematically, it is expressed as:

Force (F) = mass (m) × acceleration (a)

F = ma

Using the above equation, we can obtain the force exerted on the floor as follow:

Mass (m) = 1 Kg

Acceleration (a) = 0.5 m/s²

Force (F) =?

F = ma

F = 1 × 0.5

F = 0.5 N

Thus, the car exerted a force of 0.5 N on the floor.

Moles of gas=19.75

The gas equation can be written  

[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

V=150 L

P=4.2 atm

T=389 K

[tex]\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{4.2\times 150}{0.082\times 389}\\\\n=19.75[/tex]

Answer:

D. 2 NO3(aq)+Ca2+

Explanation:

Reaction of calcium nitrate and potassium phosphate produce calcium phosphate and potassium nitrate. The net ionic equation for this is written as : [tex]3 Ca^{2+} (aq) +2PO_{4} ^{3-} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s)[/tex]. Thus option C is correct.

What is double displacement reaction?

In a double displacement reaction, two species or groups in reactant side are displaced in the products.

In a balanced chemical equation, all the reactants have to be in proper stochiometric ratio and the states of all species are mentioned in brackets.

In an ionic equation all the ions and charges are balanced both side and the number of each elements on both side too. The net ionic equation represents the formation of a solid product from its ions.

The balanced molecular equation and complete ionic equation are written for the given  reaction below:

[tex]3 Ca (NO_{3})_{2} (aq)+ 2K_{3} PO_{4} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s) + 6 KNO_{3}(aq)[/tex]

[tex]3 Ca^{2+} (aq) +6 NO_{3}^{-} + (aq)+ 6K^{+} + (aq) 2PO_{4} ^{3-} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s) + 6 NO_{3}^{-} (aq)+ 6K^{+} (aq)[/tex]

Now when the same species on both side is cancelled, then the net ionic equation is written as:

[tex]3 Ca^{2+} (aq) +2PO_{4} ^{3-} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s)[/tex]

Therefore, the correct et ionic equation is option c.

To learn more about ionic equations, refer the link below:

https://brainly.com/question/15467511

#SPJ2

Answer:

c maybe if right plz mark brainliest

Explanation:

Answer:

14

Explanation:

it 14 there are 14 neutrons

Answer:

ρ = 2.07 g/mL

Explanation:

Step 1: Given data

Step 2: Calculate the density (ρ) of the block G

The density is an intrinsic property, equal to the mass of the block divided by its volume.

ρ = m/V

ρ = 49.231 g/23.8 mL

ρ = 2.07 g/mL

The density of the block G is 2.07 g/mL.

Answer:

True

Explanation:

it does! because of the angle between Saturn and Earth and the Sun.

Hope this helps plz hit the crown :D

Answer:

Silver Ag will be the limiting reagent.

Explanation:

The balanced reaction is:

2 Ag(s) + H₂S(g) ⇒ Ag₂S(s) + H₂(g)

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate in the reaction:

Being:

the molar mass of the compounds participating in the reaction is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate:

If you have 175g of H₂S, you can apply the following rule of three: if by stoichiomatry 34 grams of H₂S react with 215.74 grams of Ag, 175 grams of H₂S with how much mass of Ag does it react?

[tex]mass of Ag=\frac{175 grams of H_{2}S* 215.74 grams of Ag}{34 grams of H_{2}S}[/tex]

mass of Ag= 1,110.43 grams

But 1,110.43 grams of Ag are not available, 300 gra s are available. Since you have less mass than you need to react with 175 grams of H₂S, silver Ag will be the limiting reagent.

Answer:

8.8g of CO₂ could be produced

Explanation:

The reaction of combustion of butane, C₄H₁₀, is:

C₄H₁₀ + 13/2O₂ → 4CO₂ + 5H₂O

We need to find moles of butane and oxygen to obtain the limiting reactant. With moles of limiting reactant and the chemical equation we can determine moles of CO₂ and maximum mass that could be produced:

Moles butane -Molar mass: 58.12g/mol-

2.9g * (1mol / 58.12g) = 0.050 moles butane

Moles Oxygen -Molar mass: 32g/mol-

18.5g * (1mol / 32g) = 0.578 moles oxygen

For a complete reaction of 0.050moles of butane are needed:

0.050moles of butane * (13/2mol O₂ / 1mol butane) = 0.325 moles of oxygen

As there are 0.578 moles, the limiting reactant is butane and moles of carbon dioxide produced are:

0.050moles of butane * (4mol CO₂ / 1mol butane) = 0.20 moles of CO₂

The maximum mass that could be produced is - Molar mass: 44g/mol-:

0.20 moles of CO₂ * (44g/mol) =

Answer:

True

Explanation:

Nouns are words we use to name everything that surrounds us, for example, people, animals, places, things, etc.

Concrete nouns are nouns we use to name things we can detect by our senses (sight, hearing, taste, smell, and touch). The given sentence contains two concrete nouns - friend and speech.

Abstract nouns are nouns we use to name things that are not concrete, things we can't detect by our senses, for example, qualities, feelings, concepts, ideas, etc. The given sentence contains one abstract noun - democracy.

Answer:

1. mol/L

2. 0.120 M

Explanation:

1. Molarity is equal to the moles of solute divided by the liters of solution. The units of molarity are mol/L.

2.

Step 1: Given data

Step 2: Calculate the moles of solute (n)

The molar mass of NaCl is 58.44 g/mol.

n = 5.25 g × 1 mol/58.44 g = 0.0898 mol

Step 3: Determine the molarity of the solution

We will use the definition of molarity

M = n/V

M = 0.0898 mol / 0.7500 L = 0.120 M

Answer:

2/3

Explanation:

Crystals structures can also be seen when two elements combines together and the perfect example is Al₂O₃ which is given in the question above. Just like it is given in the question above, the kind of arrangement in the crystal structure for Al₂O₃ is called HCP which stands for Hexagonally Closed Pack.

The aluminum ions which is in form of Al³⁺ occupies the two-third[2/3] positions while the position that the oxygen ion occupies is one[1].

Answer: The energy of the infrared radiation is [tex]19.8\times 10^{-21}J[/tex]

Explanation:

The relationship between wavelength and energy of the wave follows the equation:

[tex]E=\frac{hc}{\lambda}[/tex]

E= energy

[tex]\lambda [/tex] = wavelength of the wave  =[tex]1.0\times 10^{-5}m[/tex]

h = Planck's constant  = [tex]6.626\times 10^{-34}Js[/tex]

c = speed of light = [tex]3\times 10^8m/s[/tex]

[tex]E=\frac{6.626\times 10^{-34}Js\times 3\times 10^8m/s}{1.0\times 10^{-5}m}[/tex]

[tex]E=19.8\times 10^{-21}J[/tex]

Thus energy of the infrared radiation is [tex]19.8\times 10^{-21}J[/tex]

Answer:

Magnets are only attracted to special metals. Iron, cobalt and nickel are magnetic. Metals that have iron in them attract magnets well. Steel is one.

Explanation:

Answer:

The number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in the number of electrons in all shells of an element is represented in the periodic table as the element's atomic number.

Explanation:

I hope that helps

Atoms gain or lose electrons to become stable by achieving octet in their valence shell. The number of electrons lost or gain is dependent upon the number of valence electrons.

The vertical columns in periodic table is called groups and the horizontal rows are called periods. A group contains elements with same number of valence electrons and similar chemical and physical properties.

According to octet rule, atoms when achieve 8 electrons in their valence shell become stable. Thus when atoms have extra electrons or deficient of electrons will lose or gain electrons to attain octet.

Metals in the left side of periodic table are all electropositive and will lose their extra valence electron. Whereas, non-metals are electron - deficient  needs to gain electron into their valence shell.

Find more on octet rule:

https://brainly.com/question/1781997

#SPJ2

Answer:

the answer is C galactose

Answer:

a. gluconic acid

Explanation:

Answer:

the answer is C ( i hope your teacher explains

Answer:

I Believe it is 4 orbitals s,p,p,p or aka sp^3

Explanation:

Answer:

Four because its hybridization is SP3 which means one s and three p orbitals combine to form hybrid orbitals

Explanation:

Answer:

1000

1/100,000

1000000000000000

1/100

70,000

Mass of iron sulfide obtained : 22 g

Reaction

Fe+S⇒FeS

8 grams of sulfur and 28 grams of iron are taken for the reaction

mol of Fe(Ar=56 g/mol) :

[tex]\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{28}{56}\\\\mol=0.5[/tex]

mol of S(Ar=32 g/mol) :

[tex]\tt mol=\dfrac{8}{32}=0.25[/tex]

Limiting reactant ⇒ S(smaller mol ratio), excess reactant : Fe

mol of FeS based on limiting (S) ⇒0.25(mol ratio from equation = 1 : 1)

Mass FeS(MW=88 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=0.25\times 88\\\\mass=22~g[/tex]

Answer:

91.224 gram

Explanation:

Answer:

3.64896 grams Zr

Explanation:

Given: amount of moles of Zr: 0.040

Find: the amount of grams of Zr

1. Find molar mass of Zr

- after looking at the periodic table, you can tell it's 91.224 g/mol

2. Solve

([tex]\frac{0.040 mol Zr}{1}[/tex])( [tex]\frac{91.224 g Zr}{1 mol Zr}[/tex])

- the mol units get cancelled out, and you're left with 0.040 x 91.224 g

3. Multiply that out: 3.64896 grams of zirconium

Answer:

23.1 x 10^11

Explanation:

(4.2x5.5) x (10^9x10^2)

23.1 x 10^11   (Add the exponents, and multiply the decimals.)

I hope this helped! :)

Answer:

V₂ = 1.48 L

Explanation:

Given data:

Initial volume = 1.23 L

Initial pressure = 755 mmHg (755/760 =0.99 atm)

Initial temperature = 0 °C (0 +273 = 273 K)

Final temperature = 50°C (50+273 = 323 K)

Final volume =  ?

Final pressure = 0.97 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 0.99 atm × 1.23 L × 323 K / 273 K × 0.97 atm

V₂ = 393.32 atm .L. K / 264.81 atm.K

V₂ = 1.48 L

Answer:

3.75mL need to be added

Explanation:

M1 x V1 = M2 x V2

so V2=(M1xV1)/M2

(2.5Mx.015L)/2M= .01875L or 18.75ml

since we want to know how much needs to be added we subtract 18.75 from 15

Giving us 3.75ml need to be added

Answer:

ddddddddddddedewxdedww

Explanation:

ddddddddddddddddddddddd

Explanation:

1. The three factors are;

- Increasing the surface area of the reactants

- Using a catalyst

- Increasing temperature

2. Raising the temperature of a reaction mixture is the same as increasing the kinetic energy of the reacting molecules.

3. This reaction is an exothermic reaction. In exothermic reaction, the temperature of the system (mixture) decreases while that of the surroundings increases.

4. Reactions that releases energy to the surroundings are exothermic reactions.

5. All the options is an example of exothermic process because heat is being removed from the system except;

B. Evaporation of water - This is because it must absorb heat from the surroundings making it endothermic.