Select the structure that corresponds
to the molecule name:
4-heptanone
A.
B.
O
CH3CH₂CH₂CCH₂CH3
C. both

Terbium-147 undergoes positron emission to become a stable atom, the stable atom is ₆₄Gd¹⁴⁷.

Series (or family) of natural radioactive decay is the set of elements with unstable nuclei, which follow an orderly sequence of spontaneous decay, that is, they emit alpha and beta particles, until a stable lead nucleus is created.

In this case, natural radioactive decay occurs when the nucleus of the atom of some chemical element is unstable and then it "breaks", releasing electromagnetic radiation and disintegrating.

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Answer: 0.160 M

Explanation:

Answer:

400°C

Explanation:

22,000 cal / (0.11 cal/g°C x 500 g) = 400°C

Answer:

400 C degree change

Explanation:

22 000 cal = 500 g * (C) * .11 cal / g-C

C = 22 000 / (500*.11)   = 400 C  degree change

It totally depends on the laser power (mW). The divergence of the light is depending on it.

A device that uses stimulated emission of photons from excited atoms or molecules to produce a strong beam of coherent monochromatic light is a laser.

When electrons in optical materials like glass, crystal, or gas absorb energy from an electrical current or light, a laser is formed.

When a 5mW 650 nm laser glows on a white surface in complete darkness, we can see it from 500 to 1 km distant.

Because of the divergence, the projected dot 1 km distant will be a huge dot with a diameter of 20–30 m30 m and will be extremely dim.

Hence,It totally depends on the laser power (mW). The divergence of the light is depending on it.

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Answer:

Why has my town experienced record-breaking cold and snowfall if the climate is warming? Is there scientific consensus that people are causing today's climate change? Do natural variations in climate contribute to today's climate change?

Explanation:

Yan po ang answer tama po yan

42.6897 grams of carbon dioxide would be produced from the following reaction, if 175 kJ of energy is given off.

The mole (symbol mol) is the SI base unit of material quantity. The amount of substance in an object or sample is a measure of how many elementary entities of a certain substance are present.

Given chemical reaction is:

[tex]2CO + O_2[/tex]  → [tex]2 CO_2[/tex]

From the stoichiometry of the reaction, it is clear that 2 moles of carbon dioxide are produced.

Actual moles will be calculated by using the enthalpy and energy value as:

Actual moles of [tex]CO_2[/tex] = 275kJ × ([tex]\frac{2 mol}{566 kJ}[/tex]) = 0.97 moles.

Grams of carbon dioxide = moles  X molar mass of carbon dioxide.

Grams of carbon dioxide = 0.97  X 44.01 g/mol

Grams of carbon dioxide = 42.6897 g

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Predator - Lions (any animal that preys upon other animals)

Scavenger - Vultures (any animal that consumes decaying flesh)

Decomposer - Worms/ Fungi (any organism that breaks down dead organisms into smaller particles and creates new compounds such as nutrients for plants)

Answer:

An ideal gas has identical particles of zero volume, with no intermolecular forces between them. The atoms or molecules in an ideal gas move at the same speed. Almost all gases obey the gas laws within a limited range of pressures and temperatures.

hope this helps!

Answer:

a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.

When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.

When we want to open a new slide we will Click on the New Slide button located on the Home tab in the Slides group. The new slide should appear below the selected slide.

So we can conclude that When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.

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Answer:

It's B

Explanation:

as I answered it in study island.

ANSWER:

3 4 of the original mass has decayed.

EXPLANATION:

After 1 half life, clearly HALF of the original isotope remains. And after TWO half-lives, a HALF + HALF of a HALF, i.e. 3 4 of the original mass has decayed.

Answer:

The answer is option D.

Explanation:

Hope it helps!

Answer:

8000g

Explanation:

option   D  is the correct answer.

Answer:

Ionic bonds are when electrons are gained/lost. Hence the valence charges.

Answer:

1.11 g

Explanation:

From the answer you're given that HCl is the limiting reactant.

Mg + 2HCl -> MgCl2 + H2

40.0 g

First of all you want to know the moles of HCl you actually have:

40.0 g HCl x  [tex]\frac{1 moles of HCl}{36.45 g/mol}[/tex] = 1.09739 moles of HCl.

Where 36.45 is the molar mass of H (1.008) + Cl (35.45).

Since the limiting reactant is HCl you'll have to discover how much H2 is produced from the limited quantity of reactant you have:

1.09739 moles of HCl x  [tex]\frac{1 moles of H2}{2 moles of HCl}[/tex] = 0.54869 moles of H2 is produced

Now you have to simply convert the moles of H2 in grams:

0.54869 moles of H2 x 2.016 g/mol H2 = 1.106 g

Where 2.016 is the molar mass of H2.

Theoretical yield of hydrogen atom is produced in 2Hcl mg , mgcl₂ and h₂ if 40.0 g of Hcl react with an excess of magnesium is 1.096 moles.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

Theoretical yield of hydrogen atom is calculated by using mass amd molar mass of an atom.

2Hcl + mg---> MgCl₂ + H₂

The theoretical yield of hydrogen is calculated as follows

mass/molar mass

40 ÷ 36.5 = 1.096 moles

by use of mole ratio of Hcl to H2 which is 2:1

moles of H2 = 1.096 ÷ 2 = 0.548moles

mass is therefore =  moles x molar mass

that is 0.548moles x 2 = 1.096 grams

Hence, the theoretical yield of hydrogen atom is 1.096 grams.

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The correct statements which are true for the reactions in the Sun are that are fusion reactions and reactions occur because of very high temperatures.

Nuclear fusion reactions are those reactions in which two species reacts with each other for the formation of new specie.

In the core of the sun, nuclear fusion of hydrogen atoms occur for the formation of helium molecules in the presence of high temperature.

Hence, the correct statements are they are fusion reactions and reactions occur because of very high temperatures.

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Answer:

Explanation:

2AlCl3 → 2Al + 3Cl2

In the reaction above, if we were to get 7.50g of AI, what would be the yield of the experiment.

Answer:

The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body. The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter.

Explanation:

The name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.

Alkanes belong to the family of  saturated hydrocarbons with carbon carbon single bond.

For the given alkane;

          CH₃    H

 CH₃ -  C   -  C - CH₃

            H      H

Thus, the name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.

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Answer:

2-methylbutane

Explanation:

Answer:

repulsion

Explanation:

Answer:

Cu2SO4 is referred to as copper sulphate

Taking into account the definition of density, the density of the metal is 5 [tex]\frac{g}{mL}[/tex].

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, the increase in the volume of water in the cylinder is due to the volume of the metal. This means that the volume of the metal can be calculated by taking into account the volume occupied by the water + the metal and the volume occupied by the water alone in the cylinder.

Then, you know that:

Replacing in the definition of density:

[tex]density=\frac{35 g}{7 mL}[/tex]

Solving:

density= 5 [tex]\frac{g}{mL}[/tex]

In summary, the density of the metal is 5 [tex]\frac{g}{mL}[/tex].

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The products in the equation would be  [tex]CO_2[/tex], [tex]SO_2[/tex], and [tex]H_2O[/tex].

From the equation of the reaction:

[tex]CH_3SH + 4O_2 --- > CO_2 + SO_2 +2H_2O[/tex]

The products are [tex]CO_2[/tex], [tex]SO_2[/tex], and [tex]H_2O[/tex].

This is because, for every chemical equation, the reactants are always at the back of arrows while products are at the front of arrows. In other words, reactants are usually on the left-hand side while products are on the right-hand side.

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Answer:

Sand would most likely be a homogeneous mixture

This question involves the concepts of time period and tangential speed.

The tangential speed of the object is "5.1 x 10⁴ m/s".

The following formula gives the time period of the object:

[tex]T=\frac{2\pi}{\omega}\\\\[/tex]

[tex]\omega = \frac{2\pi}{T}[/tex]

where,

Therefore,

[tex]\omega=\frac{2\pi}{2.2\ x\ 10^4\ s}\\\\\omega=2.86\ x\ 10^{-4}\ rad/s[/tex]

Now, the tangential speed can be given by the following formula:

[tex]v=r\omega[/tex]

where,

Therefore,

[tex]v=(1.8\ x\ 10^8\ m)(2.86\ x\ 10^{-4}\ rad/s)[/tex]

v = 5.1 x 10⁴ m/s

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Answer: 5.1 x 10⁴ m/s

Explanation:

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