which are geologic evidence?​

Answer:

CaO[tex]_{s}[/tex]

Explanation:

 The chemical reactants are;

            Calcium metal = Ca[tex]_{s}[/tex]

             Oxygen gas  = O₂[tex]_{g}[/tex]  

 Now let us write the reaction:

     2Ca[tex]_{s}[/tex]   +  O₂[tex]_{g}[/tex]  →  2CaO[tex]_{s}[/tex]

The product is CaO in solid form.

This reaction is a combination or synthesis reaction in which two substances combine to give a single product.

Answer:

All three vehicles have the same kinetic energy because they have equal speed.

Answer:

When the Ruler is bent the energy stored in it will be potential energy, When the ruler will be released this potential energy will be then converted into the Kinetic energy as a result the ruler will move Vibrations.

The energy conservation law can be applied here

K1 + U1 = K2 + U2

K1 - initial kinetic energy

U1 - Initial potential energy

K2 - final kinetic energy

U2 - final potential energy

Energy is known commonly as the ability to do work or move a matter. The type of energy that is stored is called potential energy.

if the ruler is released at the bent end, the object or pebbles on it will fly. If you hold two positive charges near each other, they have potential energy because they will move if you release them.

If the object released is fired straight up into the air, it begins with a high kinetic energy. As it rises, it slows down due to the force of gravity pulling it toward the earth.

Due to the release, the object place on the ruler rises, its gravitational potential energy is therefore increasing and its kinetic energy is decreasing.

When the object reaches the top of its arc, it kinetic energy is zero and its potential energy is maximum.

Then gravity still to pull the object down the earth and the object will fall toward the earth and just as it falls down, its speed increases and its height decreases.

So, its kinetic energy will thus increases as it falls and its potential energy decreases.

When the object has returns to its original height, its kinetic energy will be the same as when it started upward.

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Answer:

NH4)3PO4

this is a filler: jsjdkflflflsojsskksdnfkdod

Answer:

temperature differences

Explanation:

Solar heating of the Earth's surface is uneven because land heats faster than water, and this causes air to warm, expand and rise over land while it cools and sinks over the cooler water surfaces. ... Wind is the result of pressure changes in the atmosphere.

Answer:

B. Polar Easterlies

C. Sub polar low

D. Prevailing westerlies

E. Sub tropical high

F. Tropical easterlies

G. Inter tropical convergence zone

H. Tropical easterlies

I. Sub tropical high

J. Prevailing westerlies

K. Sub polar low

L. Polar easterlies

Explanation:

Answer:

Nonrenewable energy resources, like coal, nuclear, oil, and natural gas, are available in limited supplies. ... Renewable resources are replenished naturally and over relatively short periods of time. The five major renewable energy resources are solar, wind, water (hydro), biomass, and geothermal.

Explanation:

Answer:

I am answering so the other guy can get brainliest: Renewable sources are sources that are *near-infinite (because the sun will eventually die one day) that are basically not depleted when used. Nonrenewable sources are sources that deplete when you use them, which are not easily replaceable. An example of a renewable resource is Solar Energy or Hydropower, a non-renewable source is fossil fuels or natural gas.

Explanation:

Answer:

Option B. 261 KPa.

Explanation:

From the question given above, the following data were obtained:

Initial volume (V1) = 200 mL

Initial pressure (P1) = 110 kPa

Initial temperature (T1) = 275 K.

Final volume (V2) = 95 mL

Final temperature (T2) = 310 K

Final pressure (P2) =?

The new pressure (P2) can be obtained by using the following formula as illustrated below:

P1V1 /T1 = P2V2 /T2

110 × 200/275 = P2 × 95/310

22000 / 275 = P2 × 95/310

80 = P2 × 95/310

Cross multiply

80 × 310 = P2 × 95

24800 = P2 × 95

Divide both side by 95

P2 = 24800/95

P2 = 261 KPa.

Thus, the new pressure of the gas is 261 KPa.

Answer: NaCN and HBr

Explanation:

Flourine

Explanation:

The element F has a high negative (ΔeqHө) but not so high IE1 . Therefore, it is the least reactive non-metal.

Answer:

15.27895 x 10⁶kg of chlorine radical is added to the atmosphere in a year due to 100 million MVACs                                                                                              

Explanation:

Chlorofluorocarbons (CF₂Cl₂) from refrigerants produce chlorine radicals according to the following equation

         CF₂Cl₂ → CF2Cl  + Cl ⁻ .........(1)

From equation 1, one mole of CF₂Cl₂ produces one mole of Chlorine radical

From the question,

The emission rate of CF₂Cl₂ is 59.5mg/hour/MVAC

In one day the emission rate would be 59.5 x 24hours

                                                                  = 1428mg/day

In one year, the emission rate would be 1428mg/day x 365days

                                                                 =  521220mg/year

                                                                   = 521.220g/year/MVAC

Therefore the emission rate for 100 million MVAC using CF₂CL₂ in a year is

                                                                    = 52122 x 10⁶g/year/MVAC

                                                                    = 52122 x 10³kg/year/MVAC

The molar mass of CF₂CL₂                       = 120.913g/mol

No of moles  of CF₂CL₂                              = mass/ molar mass

                                                                     = 52122 x 10⁶g / 120.913g/mol

                                                                      = 431 x 10⁶ moles of CF₂Cl₂

From equation 1,  since one mole of CF₂Cl₂ produces one mole of Chlorine radical, it implies that

431 x 10⁶ moles of CF₂Cl₂ would produce 431 x 10⁶ moles of chlorine radical,

Therefore, to find the mass of chlorine radical produced, we use the formula

No of moles of chlorine radical  = mass/ molar mass

431 x10⁶ moles = mass of chlorine radical /molar mass of chlorine radical

431 x 10⁶ moles = mass/ 35.45g/mol

mass of chlorine =  431 x 10⁶ moles x 35.45 g/mol

                            =    15278.95 x 10⁶ g

In Kg, the mass    =   15,278.95 x 10³kg of cholrine radical

                             =   15.27895 x 10⁶ Kg of chlorine radical

Answer:

I HOPE IT HELPED THANKS

Answer:

Corresponding with orange light, is the wavelength that blue solutions absorb the most.

Explanation:

If light is diffused through a solution of a given color, emerges of light from another wavelength is consumed and fades away. However, the wavelength of light relating to the color of such a solution is transferred. The color of the light is consumed is usually the contrasting one being transferred. As seen in a color wheel where, blue complement orange, red complement green, and yellow complement violet.

Thus, for a blue substance in solution, its complementary color is said to be orange, Given that the wavelength of orange color varies from 600 - 640 nm where it's maximum absorbance is approximately 633 nm. This wavelength is what is employed when analyzing the standard solutions and drink samples.

Answer:

Ernest Rutherford

Explanation:

The Rutherford model, proposed originally in 1911, dipicts a planetary model of the atom in which there is a nucleus and electrons circling it.

Answer:

Niels Bohr

Explanation:

Answer:

francium

Explanation:

Atomic radii bary in a predictable across the periodic table.

The atomic radius elements increases down a group. Hence in the halogen group the last element in the group that is I have the largest radius.

Atomic radius is the distance is the distance from the nucleus to the valence orbital. The atomic radius depends on the electronegativity and number of electrons in the atom.

In periodic table, atomic radius decreases from  left to right because, the electronegativity that is the ability of atomic nucleus to attracts its electron increases and thereby the atoms shrinks.

Down a group the number of shells increases and thereby electrons are more screened from the nuclear attractive pulling. Therefore in the group from fluorine, chlorine, bromine and iodine, iodine has the less electronegativity and thus largest radius.

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Answer:

none of the above

Explanation:

Answer:

Antibiotics are medicines that help stop infections caused by bacteria. They do this by killing the bacteria or by keeping them from copying themselves or reproducing. The word antibiotic means “against life.” Any drug that kills germs in your body is technically an antibiotic. An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. They may either kill or inhibit the growth of bacteria. One of the main medicines for relieving ear pain is acetaminophen — such as Children's TYLENOL® or Infants' TYLENOL® — not antibiotics. As with any medicine, ask your doctor which pain reliver is right for your child.Antibiotics are not available without a prescription in the United States. You will need to talk to a doctor or nurse practitioner to get a prescription. You can do this in person, over the phone, or over video. Amoxicillin is used to treat certain infections caused by bacteria, such as pneumonia; bronchitis (infection of the airway tubes leading to the lungs); and infections of the ears, nose, throat, urinary tract, and skin. It is also used in combination with other medications to eliminate H. The scientists have named the molecule “halicin”, in honour of HAL, the spooky AI system from 2001: A Space Odyssey. One of the researchers has described the “amazing” molecule as “arguably one of the more powerful antibiotics that has been discovered”.

Explanation:

Answer:

C

Explanation:

Answer:

C - 3

Explanation:

This can be actually tested

Answer:

b

Explanation:

I know the answer is B hope this helps

Answer:

c .force and gravity hope this the right answer

Answer: B

Explanation: Valence electrons are the number of electrons out the outermost shell of the diagram. In this diagram, there is one valence electron. This means that it is highly reactive since the shell is not complete and needs other elements to be able to complete the outermost shell. If this model had a full outermost shell, then it would not be reactive (noble gases).

Answer: B

Explanation:This test it anoying.

Answer:

Gas.

Explanation:

Matter can be found in nature in three states: solid, liquid, and gas. The main difference between these three states is the separation of its molecules.

A solid has a definite form, its molecules are closely packed together and there is little to no movement between each molecule. When put in a container, it retains its form.

A liquid does not have a definite form, its molecules can move past another and they are not as close as in a solid, but it is not as loose either. When put in a container, it takes the shape of the container but it has a defined surface.

A gas does not have a definite form, its molecules are totally free from one another and the distance that separates them is much larger than the size they have. When placed in a container, they spread out completely and fill the entire shape of the container.

Answer:

Pressure= 2 atm

temperature= 273K

volume= 44.8cm

3

=44.* litre

so,By PV=nRT

n=

RT

PV

mole=

0.0821×273

2×44.8

so, no of moles= 3.998=4

hence, 4×6.023×10

23

=24.08×10

23

Explanation:

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At STP, one mole of every elements or molecules contains a volume of  22.4 L. Hence, a volume of 44.8 L of oxygen gas is 2 moles thus weighs 64 g.

STP is the condition of standard temperature and pressure.  A temperature of 298 kelvin and 1 atm pressure is referred to as standard temperature and pressure or STP.

At standard temperature and pressure, one mole of every compound or molecule contains 22.4 liters of the substance. We know that one mole of O₂ gas is 32 g/mol. 32 g of oxygen gas contains 22.41 liters.

The number of moles of 44.8 liters of oxygen is = 44.8/22.4 = 2 moles.

One mole of oxygen gas is 32 g. Hence, 2 moles are 64 g. Hence, the mass in grams of 44.8 oxygen is 64 g.

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Answer:

below

Explanation:

Insulators: wood, tire, glass cup, wool hat

Conductors: frying pan, penny, wire

Answer:

D. Malleability

Explanation:

Gold is made up of the element Au and it is a metal.

Pyrite is iron sulfide and it is a non-metal.