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Final answer:

To convert the mass of Jordan's puppy from milligrams to grams, divide the mass in milligrams by 1000. The puppy has a mass of 5.48 grams.

Explanation:

To convert the mass of Jordan's puppy from milligrams to grams, we need to divide the mass in milligrams by 1000. This is because there are 1000 milligrams in 1 gram.

So, to convert 5480 milligrams to grams, we divide 5480 by 1000:

5480 mg ÷ 1000 = 5.48 g

Therefore, Jordan's puppy has a mass of 5.48 grams.

Answer is: mass of burned butane is 11.6 g.

Chemical reaction: 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O.

m(butane) = 50,0 g.

V(CO₂) = 17,9 L.
n(CO₂) = V(CO₂) ÷ Vm.
n(CO₂) = 17,9 L ÷ 22,4 L/mol.
n(CO₂) = 0,8 mol.
From chemical reaction n(CO₂) : n(C₄H₁₀) = 8 : 2.
n(C₄H₁₀) = 0,8 mol ÷ 4.
n(C₄H₁₀) = 0,2 mol.
m(C₄H₁₀) = n(C₄H₁₀) · M(C₄H₁₀).
m(C₄H₁₀) = 0,2 mol · 58 g/mol.
m(C₄H₁₀) = 11,6 g.

You would use Chromatography. I hope that this answer helps :)

The answer is: B.warm air rises and takes heat with it eventually it cools and sinks.

Solar radiation is the source of electric energy.

The thermal radiation is electromagnetic radiation generated by the thermal motion of charged particles in matter.

Heat spontaneously flows from a hotter to a colder body.

The inner core is the central region of the Sun and all solar energy is produced in the core by nuclear fusion.

Radiative zone is around the inner core and in this area energy is transported by radiation.

Answer: B.warm air rises and takes heat with it eventually it cools and sinks

Explanation: There are three modes of heat transfer:

1. Conduction: This type of heat transfer happens when there is direct contact between the two object.

2.  Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas) in which convection currents are produced due to the movement of hot fluid upwards and cold fluid downwards. This happens as the density of hot fluid decreases and thus it moves upwards.

3. Radiation: This type of heat transfer happens when there is direct transfer of energy through space.

Warm air rises and takes heat with it eventually it cools and sinks  is an example of convection and not radiation.

The 15.0 kg chunk of ice, falling 8.00 meters, hits the water with a velocity of approximately 12.52 m/s and has kinetic energy of about 1176 joules.

To determine the kinetic energy and velocity of a 15.0 kg chunk of ice falling from a height of 8.00 meters, we can use the principles of physics.

Velocity Calculation:

We use the formula for the final velocity of a freely falling object:

v = √(2gh)

where:

Substitute the values:

v = √(2 * 9.8 m/s2 * 8.00 m) = √(156.8) ≈ 12.52 m/s

Kinetic Energy Calculation:

The kinetic energy (KE) can be calculated using the formula:

KE = 0.5 * m * v2

where:

Substitute the values:

KE = 0.5 * 15.0 kg * (12.52 m/s)2 = 0.5 * 15.0 * 156.8 ≈ 1176 J

So, the chunk of ice has a kinetic energy of approximately 1176 joules and a velocity of 12.52 m/s upon hitting the water.

Fossils are the preserved remaining, impressions or traces of prehistoric organisms.

Trace fossils are the naturally preserved evidence of animal activity like footprints of animals.

Body fossils are formed from the remaining of dead animals and plants like bones, teeth etc.

Bone fossils are the remaining of bones.

Cast fossils are formed by hardening of mud or sand that is filled in the mold and thus gives the shape of the organism

Thus, option D that is cast fossils record the shape and structures of an organism.

Transpiration is the process of release of water from the plants. In the absence of transpiration, the plant bursts. Thus, option D is correct.

The transpiration process is the release of water from the plants through stomata. The pressure of water allows the movement of the stomatal guard cell, and the stomata opens.

The opening of stomata releases the water inside the plants, and release of pressure results in the relaxation of stomata, thereby closing the stomata.

The absence of transpiration in plants results in the accumulation of water inside the body. The access water in the body exerts the force to the plant body, and it may burst.

Therefore, in the condition of loss of transpiration by the plants, the plant may burst out. Thus, option D is correct.

Learn more about transpiration, here:

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Answer:

The percentage yield of magnessium is 19.231 %

Explanation:

The magnesium from sea water is added to Ca(OH)2 to precipitate Mg(OH)2. This magnesium hydroxide is then reacted with HCl as follows ;

Mg(OH)2 + 2HCl → MgCl2 + 2H2O

molar mass of MgCl2 = 24.305 + 35.453 × 2 =  24. 305 + 70.906 = 95.211 g

The equation is balanced now . And 1 mole or 95.11 g of MgCl2 was produced . The magnesium chloride was electrolyzed   to produce Mg and Cl2.

The total mass of MgCl2 obtained = 962 grams

mass of the Mg obtained  = 185 grams

The percentage yield for the magnesium  = 185 / 962 × 100 = 18500/962

The percentage yield for the magnesium  = 185 / 962 × 100 = 19.231 %

The percentage yield of magnessium is 19.231 %

If 55g of CaCl2 reacts completely with sufficient Na3PO4, approximately 232.5 g of Ca3(PO4)2 could be produced in an industrial process.

To calculate how much Ca3(PO4)2 could be produced, we need to first know the reaction between CaCl2 and Na3PO4. The balanced equation for this reaction is:

2CaCl2 (aq) + Na3PO4 (aq) -> 3Ca3(PO4)2 (s) + 6NaCl (aq)

From this, we can see that 2 moles of CaCl2 react to form 3 moles of Ca3(PO4)2.

Now let's use stoichiometry to do the calculation. First, calculate the number of moles of CaCl2. The molar mass of CaCl2 is approximately 111 g/mol, so 55g of CaCl2 is about 0.5 moles.

According to the balanced equation, 0.5 moles of CaCl2 will produce 0.75 moles of Ca3(PO4)2. The molar mass of Ca3(PO4)2 is about 310 g/mol, so 0.75 moles of Ca3(PO4)2 is about 232.5 g.

In conclusion: If 55g of CaCl2 reacts completely with sufficient Na3PO4, approximately 232.5 g of Ca3(PO4)2 could be produced in an industrial process.

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A seismograph is an instrument that detects and records the vibrations caused by earthquakes, while a seismogram is the recorded data or output from a seismograph. The inner core of the Earth is solid due to the immense pressure that forces atoms closely together, despite the high temperatures.

The key difference between a seismograph and a seismogram lies in the role they play in studying seismic activity. A seismograph is an instrument that records movements within the Earth, measured by the intensity and duration of earthquakes. It essentially measures the vibrations caused by an earthquake. On the other hand, a seismogram is the actual recording produced by a seismograph. It is the visual output, typically a graph or chart, that scientists look at when studying earthquakes.

As for your second question, the inner core of the Earth is described as solid. Despite the extremely high temperatures, the immense pressure at the core forces atoms closely together, resulting in a solid state.

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Metallic bonds contribute to the characteristic properties of metals such as electrical and heat conductivity, malleability, ductility, luster, high melting points, and density due to the free movement of valence electrons and the strong attraction between metal ions and these electrons.

The Relationship Between Metallic Bonds and Metal Properties

Metallic bonds are the force of attraction between positively charged metal ions and the valence electrons that surround them. This creates a lattice-like structure where electrons are free to move. This electrical conductivity is due to electrons being able to flow through the metal, allowing it to carry an electric current. Similarly, the close packing of positive nuclei in metals enables efficient heat conduction.

Metallic bonds also give metals their malleability (the ability to be hammered into sheets) and ductility (the capacity to be stretched into wires), because the layers of atoms can slide past each other without breaking the metallic bonds. The sharing of valence electrons among a sea of metal ions also accounts for the metals' characteristic luster, as electrons absorb and re-emit light energy.

Due to the strength of the metallic bonds, metals typically exhibit high melting points. The tight packing of the atomic structure, resultant from these bonds, also explains the high density commonly associated with metallic substances. Furthermore, metals often form cations in compounds due to the ease with which they can lose valence electrons, a trait that is tied to their metallic bonding nature.

Metallic bonds form a 'sea of electrons' that accounts for the unique properties of metals. This includes high electrical and thermal conductivity, malleability, ductility, and metallic lustre. Examples of metals with these properties are aluminum, copper, and iron.

Metallic Bonds and Properties of Metals:

Metallic bonds are formed between metal atoms due to the unique electronic structure of metals. These bonds are characterized by a 'sea of electrons' where valence electrons are free to move around the fixed cations. This freedom of electrons accounts for various properties of metals.

Examples include aluminum, copper, and iron, each demonstrating these characteristic features due to metallic bonding.

Final answer:

Calcium and sulfur combine to form the ionic compound calcium sulfide, written as CaS, due to the metal calcium cation combining with the nonmetal sulfur anion to balance the charges.

Explanation:

A compound consisting of calcium and sulfur forms an ionic compound. Calcium is a group 2 element and forms a calcium cation (Ca2+), while sulfur is a group 16 element and forms a sulfide anion (S2-). In an ionic compound, the total charge of the cations and anions must be equal. Therefore, one calcium ion will combine with one sulfur ion to form the compound calcium sulfide, which is written as CaS. This compound is ionic because it consists of a metal (calcium) and a nonmetal (sulfur) element.

The answer is B: Minimize Habitat Destruction

Answer:

1.15 Kilo-joules are provided as electricity

Explanation:

The law of conservation of energy states that: "Energy can neither be created nor destroyed, but can convert from one form to another".

Applying this on the givens, we would find that:

driving energy = energy provided as electricity + energy lost as heat

2.75 = energy provided as electricity + 1.6

energy provided as electricity = 2.75 - 1.6 = 1/15 kilo-jo

Phosphorus (P) belongs to group 15 in the periodic table with atomic number = 15

Sulfur (S) belongs to group 16 in the periodic table with atomic number = 16

Now:

Atomic number = Number of protons present in an element

Therefore:

# protons in P = 15

# protons in S = 16

Now, on moving from left to right across the periodic table, the atomic radius decreases. This is because, as the atomic number increases, the nuclear charge also increases due to which the added electron feels a stronger pull towards the nucleus.

Based on the above, S will have a smaller radius and one more proton than P

Ans:A)

The work done on the wheelbarrow is 6000 Joules, and the power required to do this work in 10 seconds is 600 Watts.

The question asks about the concepts of work, force, and power in a real-world situation. In this case, we can use the equation for work, which is Work = Force x Distance. Given that the force is 200N and the distance is 30m, then by multiplying these two, the work done on the wheelbarrow is 6000 Joules.

Power, on the other hand, is the rate at which work is done. It is computed as Work Done ÷ Time Taken. If the work done is 6000 Joules and it takes 10 seconds, the power required would be 600J/sec or 600W (Watts).

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Answer:

breathing

Explanation: