ILL GIVE BRAINLIST PLS Question 3 of 5
Rhyolite forms as lava cools very quickly, forming holes.
Sometimes gems can form within the holes. The image
shows fire opal within rhyolite,
Which type of rock is rhyolite?
O A. Intrusive igneous
B. Extrusive igneous
O C. Metamorphic
D. Sedimentary

The molar mass of the product gas is 12.061 g/mole. This is determined by using the concept of  Graham's law of effusion.

According to  Graham's law of effusion.

rate1 / rate2  = \(\sqrt{(MM2 / MM1 )}\)

where, rate1 is the rate of effusion of first gas and  rate2 is the rate of effusion of second gas , MM1 is the molar mass of first gas and MM2 is the molar mass of second gas.

According to the given problem,

rate of effusion of unknown gas(rate1 ) / rate of effusion of CO2 (rate2 )  = 1.91

And, we know that, MM2  = molar mass of CO2 = [12+ (2*16)] g/mol = 44 g/mole

We need to find out MM1 (molar mass of unknown gas)

Putting these values in the Mathematical Formula, we get,

1.91 = \(\sqrt{(44g/mol / MM1 )}\)

(1.91)2 = 44g/mole / MM1

MM1  = (44 g/mole ) / 3.6481  = 12.061 g/mole

The molar mass of the product of gas calculated is 12.061 g/mole.

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Answer:

it's b or d I am not 100% sure witch one tho

Answer:

B.

Explanation:

It is B because it says which is an example of A PHYSICAL MODEL. B is a physical model becuase by using tennis balls to represent the plantes (including the sun)

it is a model of a problem!!!

Have a great day!

Hope this helps!

-Lea

Answer:

Percy Lavon Julian

Explanation:

In 1949, American research scientist Percy Lavon Julian revealed the synthesis of Compound S from the cheap and widely accessible pregnenolone, as part of his hunt for new ways to make cortisone (synthesized from the soybean oil sterol stigmasterol).

Answer:

the answer is c

Explanation:

Answer:

chromatography

Explanation:

this method of separation is used to identify harmful toxins in some medicines

Explanation:

the last CH2 should CH3

because the first and last carbons are bonded to three hydrogens

Answer:

53.29%oxygen

Explanation:

math and stuff

In the box on a periodic table  we can find its atomic number, symbol, average atomic mass, and (sometimes) name of the element.

By the 20th century, it was clear that atomic numbers, not atomic masses, were involved in the periodic relationship. The periodic law, a more recent formulation of this relationship, states that an element's properties are a periodic function of its atomic number.

The elements are arranged in a modern periodic table in increasing order of their atomic numbers, and atoms with comparable properties are grouped in the same vertical column (Figure below). With its atomic number, symbol, average atomic mass, and (sometimes) name, each box represents an element. The elements are grouped in 18 vertical columns called groups and seven horizontal rows known as periods or series.

Each column's header lists the names of its groups. Roman numerals and capital letters have traditionally been used on labels in the United States. The IUPAC advises using the digits 1 through 18, and these labels are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the table's main body in order for it to fit on a single page.

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Answer:

A. True

B. False

Explanation:

Reaction between hypochlorous acid and ammonia does not yields a Ph value of 7.00 , this value is defined to water and no other reaction can yield exactly this Ph value. The acid reaction will give a Ph value below 7 while a base reaction will give Ph value of above 7.

The odd one among the options listed is golf because it is not an element (option D).

Chemical elements in chemistry are one of the simplest chemical substances that cannot be decomposed in a chemical reaction.

Chemical elements consist of atoms which have the same number of protons. The chemical elements are arranged on the periodic table in accordance with their atomic numbers.

There are a total number of 118 chemical elements in nature. The periodic table uses abbreviated chemical symbols in place of full element names, for example, Copper is symbolized using Cu while pottasium is symbolized using K.

Golf is a ball game played by individuals competing against one another in which the object is to hit a ball into each of a series of (usually 18 or nine) holes in the minimum number of strokes.

Golf is a sport, hence, is the odd one among the other options which are chemical elements.

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Answer:

They will either will stick or have a chemical reation

Answer:

Some form of a reaction happens.

These are 4 examples of collisions.

Answer:

CO

Explanation:

Elements will only one capital letter, that may/may not have a lower case letter after it. CO has a capital letter followed by another capital, so it's a compound

Yes, an atom's nucleus is held together by the strong nuclear force. The strong nuclear force is a fundamental force of nature that binds together protons and neutrons in the nucleus.

This force acts over a very short range and is much stronger than the electrostatic force of repulsion between the protons. The strong nuclear force is responsible for keeping the protons and neutrons together in the nucleus, and it is also responsible for binding together the nucleons to form the nucleus of an atom.

This force is also responsible for the stability of the nucleus, as it helps counteract the electrostatic force of repulsion between the protons. The strong nuclear force is also responsible for the binding energy of the nucleus, and it is this energy that holds the nucleus together.

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6.0×10⁵m is the wavelength of hello light emitted by sodium lamp if the frequency of the radiation is 5x10⁴.

A periodic wave's wavelength is its spatial period, or the length over which its form repeats. It is a property of the both traveling waves as well as standing waves in addition to different spatial wave patterns. It refers to the distance between two successive corresponding locations of the same phase just on wave, such as two nearby crests, troughs, and zero crossings.

The spatial frequency is the reciprocal of wavelength. The Greek letter lambda is frequently used to represent wavelength. The term wavelength also was occasionally used to refer to modulated waves, their sinusoidal envelopes, or waves created by the interaction of several sinusoids.

ν=c/λ

5x10⁴=3×10⁸/λ

λ =3×10⁸/ 5x10⁴

  =6.0×10⁵m

Therefore, 6.0×10⁵m is the wavelength.

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Balanced chemical equation is the equation in which the number of atoms of each type in the reaction is the same on both sides i.e., reactant side and product side. In a balanced chemical reaction mass of both the sides of the reaction are equal.

1. MgO + HBr → MgBr₂ + H₂O

Balanced chemical reaction:

MgO + 2HBr → MgBr₂ + H₂O

2. N₂ + O₂ → N₂O₂

Balanced chemical reaction:

N₂ + O₂ → N₂O₂

3. C₂H₄ + O₂ → CO₂ + H₂O

Balanced chemical reaction:

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

4. Fe + HCl → FeCl₂ + H₂

Balanced chemical reaction:

Fe + 2HCl → FeCl₂ + H₂

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Answer:

Mass and volume dude

Explanation:

-------

Volume

In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

Electrons:

An electron is a negatively charged particle which can be either bounded with to an atom. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.

Valence Electrons:

Valence electrons are those electrons which are present in outermost shell or in valence shell or energy level of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

Electron Shells Numbers:

Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

So we can conclude that In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

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It takes so much heat to melt ice or evaporate water because extra energy is required to break the hydrogen bonds between water molecules.

Hydrogen bonding is an electrostatic force of attraction between a hydrogen atom found between a pair of other atoms having a high affinity for electrons.

Hydrogen bonds cause water to be exceptionally attracted to each other creating cohesion.

It takes so much heat to melt ice or evaporate water because extra energy is required to break the hydrogen bonds between water molecules.

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A. Manufacturer's website, B. Chemical supplier or distributor, C. Occupational safety and health administration (OSHA) website, D. Chemical regulatory agencies' websites, E. Workplace safety portals or intranets, F. Online SDS databases, G. Physical copies provided by the manufacturer or supplier.

Manufacturers often provide the SDS for their products on their websites. Chemical suppliers or distributors may also have the SDS available for download or request. Government organizations such as OSHA and chemical regulatory agencies often maintain databases of SDSs that can be accessed online. Workplace safety portals or intranets may provide access to SDSs for employees. Additionally, there are online SDS databases that compile and provide access to a wide range of SDSs. Lastly, physical copies of SDSs may be provided by the manufacturer or supplier, either upon request or included with the shipment of the chemical. In summary, an SDS for a chemical can be found on the manufacturer's website, the website of a chemical supplier or distributor, OSHA and chemical regulatory agencies' websites, workplace safety portals or intranets, online SDS databases, and physical copies provided by the manufacturer or supplier. These sources ensure easy access to crucial safety information regarding the handling and use of chemicals.

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Answer:

2NaOH + 2Al +2H2O = 2NaAlO2 +3H

Explanation:

Aluminum is an amphoteric element it reacts with both bases and acids to form a salt and hydrogen gas.The reaction is highly exothermic.

Answer:  I just try this  

Answer:

C.Energy is absorbed because the products have more chemical energy than the reactants.

Explanation:

Answer:

The thermal decomposition of ammonium nitrate to produce dinitrogen monoxide and water. This reaction takes place at a temperature of 200-260°C.

The chemical reaction that occurs when 50.00 g of dinitrogen tetroxide (N2O4, 92.02 g/mol) reacts with 47.50 g of hydrazine (N2H4, 32.06 g/mol) to produce nitrogen gas and water can be written as:

2 N2O4 (g) + 4 N2H4 (g) → 4 N2 (g) + 8 H2O (g)

If the percent yield of the reaction is 100%, then the excess reagent left over after the reaction will be 0 grams. This is because when the reaction yield is 100%, all reagents used in the reaction will be entirely consumed. On the other hand, if the percent yield of the reaction is only 75%, then the excess reagent left over after the reaction will be 2.22 grams. This is because when the reaction yield is only 75%, some of the reagents used in the reaction will remain as excess reagents after the reaction is completed.

Overall, the amount of excess reagents left over after the reaction depends on the percent yield of the reaction. If the percent yield of the reaction is 100%, then no reagents will be left over after the reaction is completed. However, if the percent yield of the reaction is lower than 100%, then some of the reagents used in the reaction will remain as excess reagents after the reaction is completed.

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The specific heat capacity of liquid water is 4.18 J/g °C. The quantity of energy required to heat 1.50 g of water from 26.5°C to 83.7°C is 359 J.

The specific heat of a substance is defined as the heat required to raise a temperature of a substance by 1°C. In other words, it is also referred as a mass heat capacity.

The quantity of energy for a substance is calculated as

q=m×c×ΔT

Where ΔT=(T_f-T_i)

T_f=83.7°C, T_i=26.5°C

ΔT=(83.7-26.5)°C=57.2°C

And c=4.18 J/g °C

m=1.50g

Substitute all the values in the formula

q=1.50g×(4.18 J/g°C)×57.2°C

q=358.644 J

q=359 J

Therefore, the heat required for 1.50g of water is 359 J.

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Since 273 k – 243 k equals 30, the temperature change for an object going from 273 k to 243 k is 30 k.

Colors and temperatures can both be measured in Kelvin: A temperature unit commonly used in science is the Kelvin scale. Lord Kelvin created the scale after realizing the need for one with absolute zero as the zero point, which translates to 0 K as the lowest attainable temperature, or -273,15 °C.

On the Kelvin scale, a body's temperature cannot be negative. Since the Kelvin scale's absolute zero represents the lowest temperature that may exist, it is impossible for it to be negative.

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