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[tex]\huge\bold\green{Answer:-}[/tex]

Both venae cavae (7) pass the deoxygenated blood to the right atrium. Blood from the right atrium (1) enters right ventricle (2) and pulmonary arteries (6) carry deoxygenated blood from right ventricle to lungs for oxygenation. Two pulmonary veins (8) come from each lung and pass oxygenated blood to left atrium (3). The left ventricle (4) pumps blood into the aorta (5) which in turn branches and delivers blood to the major body regions and organs.So, the correct answer is option A.

C. boiling

when water starts boiling you will se bubbles appearing

Answer:

Hydrogen. H.

Helium. He.

Lithium. Li.

Beryllium. Be.

Boron. B.

Carbon. C.

Nitrogen. N.

Oxygen. O.

Fluorine

Neon

Explanation:

Answer:

[Ne] 3s2 3p2

Explanation:

Neon (Ne) is the noble gas right before silicon (Si).

Then right after neon is the 3s subshell. It has two electrons and is full.

After 3s comes the 3p subshell, and silicon only has two electrons in the 3p subshell (you can just count the electrons in each subshell on your periodic table).

Less than 6.0 grams of copper is formed, and some aluminum is left in the reaction mixture

From the equation of the reaction:

3CuCl2 + 2Al → 2AlCl3 + 3Cu

Mole ratio of CuCl2 and Al = 3:2

Mole of 1.5 g aluminum foil = 1.5/26.98

                                                    = 0.06 moles

Mole of 14 g CuCl2 = 14/134.45

                                    = 0.10 moles

For every 3 moles of CuCl2, 2 mole of Al is needed.

Thus, for 0.10 moles of CuCl2, the mole of Al needed would be:

                                      0.10 x 2/3 = 0.07 moles

CuCl2 is, thus, slightly in excess while Al is the limiting reagent.

Mole ratio of Al and Cu = 2:3

For 0.06 mole Al, the mole of Cu will be: 0.06x3/2 = 0.09 moles

Mass of 0.09 moles Cu = 0.09 x 63.55

                                            = 5.71 g

Thus, less than 6.0 grams Cu is formed while a little CuCl2 would be left in the reaction mixture.

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Answer:

than, (less than or exactly one mole

Answer:

Float

Explanation:

Becuase 240 g had more volume then the 60 cm3 which is lighter that the mass of 240 grams

Answer:

Sulfur, which only needs two electrons to complete it octet, will pick up the two electrons coming from magnesium, becoming the sulfide anion, S2− , in the process. The electrostatic force of attraction will then bring the magnesium cations and the sulfur anions together → an ionic bond i

To convert moles to gram multiply 3.7 moles of BaF2 to the molar mass of BaF2

BaF2 molar mass = 175.326

3.7 moles x 175.326g = 648.70g BaF2

Answer:

350mmHg

Explanation:

Use Dalton law

Total=P gas 1+p gas 2+ P gas 3

825=P1+350+125

825=P1+475

825-475= P1

P1= 350 mm Hg

Answer:

c. Cohesion

Explanation:

Hope this helps and have a nice day

Answer:A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetized materials. A charge that is moving in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field

Explanation:hope this helps :DD

Answer:

a. because of how the earth circulates around the sun.

Answer:

The answer is "2736.1 J"

Explanation:

[tex]m= 59.0 \ g\\\\t_2 = -22\\\\\Delta t= t_1-t_2\\\\[/tex]

     [tex]= 0-(-22)\\= 22[/tex]

specific heat for ice = 2.108 [tex]\frac{J}{gk} \\[/tex]

Formula:

[tex]\bold{Q= mc \Delta t} \\[/tex]

   [tex]= 59 \times 2.108 \times 22\\\\= 2736.1 \ \ J[/tex]

Answer:

multiply, 112 and 25.1 then divide the answer in six

Explanation:

The concentration of of dilute yellow 6 dye is 112.448 ppm.

PPM or parts per million is a term in chemistry used to denote very low concentrations of solution.It is defined  as milligrams of substance present in 1 liter of solution.

It is technically  a dimensionless quantity useful for measuring smaller concentrations present in a solution.This conversion has many scientific applications .

It is how many parts a particular compound or molecule takes up within the one million part of the whole solution. It is used for describing concentrations  of substances which are usually dissolved in a solvent.

For calculating ppm concentration when two solutions one with ppm concentration is known can be found out by:

ppm of solution-1 ×volume=ppm of solution-2×volume

112×251=ppm of solution-2×25

=112.44 ppm

For calculating ppm of solution both the parts of the equation must have same weight or volume.

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Answer:

B and D

Explanation:

They collect equal amounts.of solar energy

Answer:

The answer is
C. B and D

Explanation:

The equator is where there is the most solar energy
B and D are symmetrical over the equator.

Answer:

C. the motion of gas particles.

Explanation:

The kinetic molecular theory is a simple but very effective model that effectively explains ideal gas behavior. The theory assumes that gases consist of widely separated molecules of negligible volume that are in constant motion, colliding elastically with one another and the walls of their container with average velocities determined by their absolute temperatures.

For a volume of 75 mL of 0. 060 M NaF is mixed with 25 mL of 0. 15 M Sr(NO3)2, the concentrations in the final solution is mathematically given as

Generally, the equation for the molarity of NaF is mathematically given as

M NaF= millimoles / total volume

M NaF= = 75 x 0.060 / (75+ 25)

M NaF  = 0.045

Where, Sr(NO3)2 molarity = 25 x 0.15 / (75+ 25)

Sr(NO3)2 molarity = 0.0375 M

The Chemmical reaction of Sr and F is

Sr+2 + 2 F ---> SrF2  

Therefore,Ksp = [Sr+2] [F-]^2

2.0 x 10^-10 = 0.015 [F-]^2

[F-] = 1.2 x 10^-4 M

In conclusion,  the concentrations are

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Molarity determines the molar concentration of the solute dissolved in the solution. Mass and volume should be measured for the estimation of the molarity.

Molarity is the mass of the solute present in the litre of solution. It is also called molar concentration as it estimates the concentration of the compounds.

The unit of molarity is mol/L and can be given by the formula:

[tex]\rm Molarity(M) = \rm \dfrac{ \text{Mass of solute}}{\text{Molar mass of solute}}\times \text{Volume of Solution in L}[/tex]

Therefore, for the formation of a 2M potassium nitrate solution, the volume of the solution and mass of the solute is required.

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9514 1404 393

Answer:

  Meteor: A streak of light made when an object burns up as it enters Earth's atmosphere

Explanation:

A meteorite is an object that has come from space and hit Earth.

A comet is a space object that develops a tail as it nears the sun. It is believed to be a mixture of dust and ice. In general, a comet will appear stationary in the night sky, since it moves rather slowly relative the starry background.

A meteor is a space object that makes a streak of light across the sky as it burns up in the atmosphere. (It may or may not become a meteorite, depending on the degree to which it burns up.)

__

UFOs have also been known to make streaks of light when moving across the sky.

Answer:

A streak of light made when an object burns up as it enters Earth's atmosphere

Explanation:

100 % 2021  

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Fluorine reacts with Calcium metal to form calcium fluoride

[tex]\\ \rm\rightarrowtail Flourine+Calcium\longrightarrow CaF_2[/tex]

[tex]\\ \rm\rightarrowtail Fluorine(g)+Calcium (s)\longrightarrow Calcium\: Fluoride (s)[/tex]

The chemical equation when fluorine gas reacts with calcium metal to form solid calcium fluoride is Ca + F₂[tex]\rightarrow[/tex] CaF₂.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

It had changed by .001 liters because of the way that cold air can't evaporate more than .5 liters of air

Explanation:

Answer:

Reversible reactions that happen in a closed system eventually reach equilibrium. At equilibrium, the concentrations of reactants and products do not change. But the forward and reverse reactions have not stopped - they are still going on, and at the same rate as each other.

When any reversible reaction is at equilibrium, the conditions are necessarily true are the amount of reactant and products stops changing, and the rate of forward reaction equals rate of backward reaction. The correct options are B and D.

A reversible reaction occurs when the conversion of reactants to products and the conversion of products to reactants occur at the same time.

A and B can react to form C and D, or C and D can react to form A and B in the reverse reaction. In thermodynamics, this is not the same as a reversible process.

In a closed system, reversible reactions eventually reach equilibrium. The concentrations of both reactants and products remain constant at equilibrium.

But the forward and reverse reactions have not stopped; they are still occurring at the same rate.

Reversible reactions continue until equilibrium is reached, which means that the amounts of reactant and product are balanced.

Thus, the correct options are B and D.

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Your question seems incomplete, the missing options are attached below as image:

Answer:

Each magnet should have been tested on many different magnetizable materials

Explanation:

In designing an experiment such as that outlined above, the experimental design should have included many different magnetizable materials.

All the types of magnets; the horseshoe, the bar, and the ring magnet should have been tested using many different magnetizable materials apart from the metal object. By so doing, the strongest magnet can be effectively determined without bias because it will attract the greatest number of magnetizable materials.

Again, the shape of the magnet affects its ability to attract objects. Hence, different shapes of magnets can not effectively be compared for relative magnetic strength.

Explanation:

bold is strong

The stoichiometry supports the law of conservation of mass by comparing the mass of the products to the mass of the reactants.

Stoichiometry is the measurement of the reactant and product of a reaction.

It is found in the law of conservation of mass, which says that the mass of the reactant is equal to the mass of the product.

Due to stoichiometry, if the mass of the product is known then, the mass of the reactant can be known.

Thus, the correct option is D.

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Answer:

A the decrease in temp will cause a decrease in the volume of the raft and this drop in volume of the raft and this drop in volume may cause Ava to sink while on raft.