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Explanation: The Ice Would Sink Toward the Bottom

Density of Ice at 0 Celsius is 0.92 grams per milliliter. Therefore the Ice has a greater density than ethanol, and the ice cube should sink toward the bottom

Answer: all can be affected by the natural environment ( not sure answer hope it helped)

Explanation:

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, rock, air and water all are matter.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Rock, air and water all are matter.

Therefore, rock, air and water all are matter.

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Answer:

(1) See below, (2) About 8.4 pH, (3) About 3.981 * 10⁻⁶ mol dm⁻³

Explanation:

1. A buffer is a solution that resist pH when adding a basic or acidic compound. It's purpose is to neutralize added acids and bases.

2. Remember that the formula for pH is -log [H+]. We have a 0.1 M solution of baking soda in water with [H+] of about 4.0 × 10⁻⁹. Therefore we can calculate the pH as follows...

pH = -log (4.0 × 10⁻⁹)

pH = -(-8.39794...) = (About) 8.4 pH of 0.1 M of baking soda

3. This question has a similar set up...

pH = -log [H+]

[H+] = inverse of log^- pH

[H+] = 10^-5.4 = (About) 3.981 [tex]*[/tex] 10⁻⁶

Answer:

Becausee deep - water waves do not interact with the ocean bottom as they travel , their speed is independent of the water depth . But as waves enter shallow water , interaction with the bottom alters the waves . Wave speed decreases , wavelength shortens and wave height increases .

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Answer:

(a) from the anode to the cathode through the external circuit

Explanation:

In an electrochemical cell, there are two half cells; the oxidation half cell and reduction half cell. Oxidation typically refers to loss of electrons and reduction refers to gain of electrons.

Electrons always flow from the anode to the cathode or from the oxidation half cell to the reduction half cell.

The electrical circuit in an electrochemical cell confirms the flow of electron. Usually a light bulb is attached. The correct option is;

(a) from the anode to the cathode through the external circuit

In an electrochemical cell, the direction which electrons travel is: (a) from the anode to the cathode through the external circuit.

Electrons can be defined as the subatomic particles of a chemical element that are negatively charged and have a magnitude of -1.

An electrochemical cell refers to a device that is capable of either generating electric current from the electrical energy released by a spontaneous redox reaction or using an electrical energy to cause chemical reactions.

Generally, an electrochemical cell is also referred to as a secondary cell and a good example is a rechargeable battery.

In Science, the direction of flow of current is usually from the anode (positive side) to the cathode (negative side) in an electrical circuit.

On a related, current is made up of electrons and as such the direction which electrons travel is usually from the anode to the cathode through the external electrical circuit.

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Answer:

A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons; therefore, it has a mass number of 12 (six protons plus six neutrons). Neutral carbon-14 contains six protons, eight neutrons, and six electrons; its mass number is 14 (six protons plus eight neutrons)

Answer:

2.32 liters

Explanation:

you would just divide 24 by 3 which is 8 and multiply 290 by it which is 2320 and divide by 1000 which is 2.32

The quantity of milk that will the lamb give in 24 hours is 2.32 Liter.

Lamb may be defined as the youngest form of sheep. In other words, it may be characterized as the little offspring produced by a sheep.

According to the question,

The amount of milk given by lamb in three hours = 290 milliliters.

∴ The amount of milk given by lamb in one hour = 96.66 milliliters.

Now, the amount of milk given by a lamb in 24 hours = 24 × 96.66 = 2320 milliliters.

Now, as per the requirement of the question, convert milliliter into liter.

One liter = 1000 milliliters.

∴2320 milliliters = 2320/1000 = 2.32 liters.

Therefore, the quantity of milk that will the lamb give in 24 hours is 2.32 Liter.

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Answer:

A

Explanation:

Benedict's test is the ideal standard test to distinguished between reducing(glucose) and Non reducing(diasaccharides,sucrose).

Benedict's tests gives a positive test for the presence of reducing sugar,with the initial mixture of the sugar solution changing from  the initials green and orange  color   and brick red precipate of copper (ii) ,which would not dissolve in solution.

However, with non reducing the Benedict's gives a negative test.Because no color change occurs.

In either case,the chemical reaction that occurs as the solution gained heat  is exothermic and this may lead to boiling of the solution and spilling onto the burner,which may lead to explosion.

Answer:

Physical properties is that is value a state of the describes that physical system.

Explanation:

Physical property is that perform physical system can be used to the momentary and to referred the physical quantity.

Answer:

Everything that has mass and takes up space is matter. Every day, you encounter phenomena that either don't have mass or don't take up space. They are non-matter. Basically, any type of energy or any abstract concept is an example of something that is not matter.

An apple.

A person.

A table.

Air.

Water.

A computer.

Paper.

Iron.

hope this helped you

Answer:

The answer is 60300000

Explanation:

The standard notation is the counterpart of the scientific notation, while the scientific notation tries to make the number smaller by using exponential numbers with base 10, the standard notation leaves them as whole numbers or decimal numbers.

Example: 5x10∧3 is written in standard notation as 5000; Where 3 tells us the amount of 0 that follows the whole number.

2.05x10∧2 is = 205 in standard notation; Where the 2 tells us the number of times the comma is moved to the right.

A. group 1.

Hope this helps.

Answer:

[tex]\Large \boxed{\mathrm{\bold{A.} \ Group \ 1}}[/tex]

Explanation:

In covalent bonding, atoms share electrons from their last shell to other atoms to gain stability.

Chlorine has 7 electrons in its last shell, it needs to gain 1 electron to become stable.

Group 1 elements have 1 electron in their last shell, they need to lose 1 electron to become stable.

Group 1 elements can bond with chlorine.

Explanation:

Alkali metals have low melting points, low electronegativity, and low ionization energies.  They are malleable and ductile.  They are also good conductors of heat and energy.

Since they have one electron in their valence, alkali metals are very reactive.  This means that they are not found alone in nature.

Answer:

Long Form of Periodic Table. The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table.

Answer:

Long Form of Periodic Table. The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table.

Answer:

New experimental methods

Technological inventions

Explanation:

A scientific theory is usually not based on speculation. Scientific theories must have a solid empirical basis.

However, experimental methods are limited to the caliber of equipments available at the time in which a theory is formulated. With advancing years, more technological sophistication leads to the invention of new instruments and ultimately, the development of new experimental methods.

These innovations are likely to alter existing scientific theories as new evidences emerge, hence the answer.

new experimental methods

new hypotheses

technological inventions

Answer:

The volume of water vapor produced at STP is 11.60 L.

Explanation:

The decomposition reaction of H₂O₂ is:

2H₂O₂ → O₂ + 2H₂O     (1)

We have:

m(H₂O₂): mass = 17.0 g

M(H₂O₂): molar mass = 34 g/mol    

To find the volume of water vapor produced we need to find first the number of moles of H₂O₂ and H₂O:

[tex] n_{H_{2}O_{2}} = \frac{m}{M} = \frac{17.0 g}{34 g/mol} = 0.5 moles [/tex]

From the reaction (1) we have that 2 moles of H₂O₂ produce 2 moles of H₂O, so the number of moles of H₂O is:

[tex] 2n_{H_{2}O_{2}} = 2n_{H_{2}O} \rightarrow n_{H_{2}O} = 0.5 moles [/tex]

Now, we can find the volume of water vapor produced at STP, using Ideal gas law:

[tex] V = \frac{nRT}{P} = \frac{0.5 moles*0.085 L*atm/K*mol*273 K}{1 atm} = 11.60 L [/tex]  

Therefore, the volume of water vapor produced at STP is 11.60 L.

I hope it helps you!

Answer:

The moon should be at 543 cm.

Explanation:

If according to scientists the distance from the earth to the moon is approximately 384400 km

.

The earth has a radius of 6371 km.

A basketball has a radius of 9 cm.  (Using a basketball of this radius as a reference)

With these data you can make a rule of 3:

The earth in centimeters has a radius of 6.371e+8 cm.

So: If the earth has a radius of 6.371e+8 cm and a distance to the moon of 384,400 km, what would the distance be if the earth had a radius of 9 cm?

6.371e+8 cm      :      9 cm

384400 km       :       X

X = (384400 km * 9 cm) / 6.371e+8 cm

X = 5.43e-3 km converting to centimeters would give that:

X = 543 cm

The moon should be at 543 cm from Earth.

Answer:

the proton

Explanation:

Inside an atom there are neutrons which  have a neutral charge (no charge) and protons which have a positive charge. Outside an atom there are electrons those have a negative charge.

Answer:

Give any two application for isotopes

Isotopes of iodine are used for radiotherapy in treatment of hyperthyroidism, cancer, etc.

Uranium, Radium, Polonium isotopes are used in atomic reactors.

Cobalt isotopes are used for irradiation of food products.

✅1) Isotopes of iodine are used for radiotherapy in treatment of hyperthyroidism, cancer, etc.

✅2) Uranium, Radium, Polonium isotopes are used in atomic reactors.

IamSugarBee

Answer:

The test solution is acidified using a few drops of dilute nitric acid, and then a few drops of silver nitrate solution are added. Different coloured silver halide precipitates form, depending on the halide ions present: ... iodide ions give a yellow precipitate of silver iodide.

Answer:730

Explanation:

Answer: I agree with the student because in the question prior to this One question stated thatExtensive properties very with the amount of matter ina sample, so yes i agree.

Explanation:

Answer:

All matter consists of indivisible particles called atoms. Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms. Hope that helps : )

hello,

here is your answer:

**********

Postulates of Dalton's atomic theory:

⇒ All matter is made up of very tiny particles called atoms.

⇒ Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.

⇒ Atoms of a given element are identical in mass and chemical properties.

⇒ Atoms of different elements have different masses and chemical properties.

⇒ Atoms combine in the ratio of small whole numbers to form compounds.

⇒ The relative number and kinds of atoms are constant in a given compound.

⇒ Atoms of the same elements can combine in more than one ratio to form more than one compound.

**********

hope this helped,

:)

Answer:

Inventing gadgets to make their work easier.

Protecting the country using bombs and guns.

Explanation:

Answer:

Hey there!

22.0 has three significant figures.

Let me know if this helps :)

Answer:

0.00026

Explanation:

it is in the picture

Answer:

it is option A

Explanation: nitrification, is the process by which bacteria in the soil convert ammonia to nitrites and nitrates. Ammonia (NH3) was produced by nitrogen fixation, but plants prefer nitrites and nitrates as a source of nitrogen and oxygen.

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