a gas mixture being used to simulate the atmosphere of another planet consists of 359 mg of methane, 212 mg of argon, and 256 mg of nitrogen. the partial pressure of nitrogen at 308 k is 16 kpa. calculate the total pressure of the mixture. answer in units of kpa

The correct answer is C. When magnesium and nitrogen react, they form a compound with the formula Mg3N2. In this compound, magnesium loses 2 electrons to form Mg2+ ions, while nitrogen gains 3 electrons to form N3- ions.

The lattice of the compound will be composed of Mg2+ and N3- ions, not Mg2- and N3+ ions as stated in option A. Option B is incorrect because the reaction between magnesium and nitrogen is actually exothermic, not endothermic. This means that energy is released during the reaction rather than absorbed. Option D is also incorrect because the melting point of Mg3N2 is actually lower than that of NaCl. This is due to the fact that Mg3N2 has a layered structure, which makes it easier for the layers to slide past each other and therefore melt at a lower temperature. In conclusion, option C is the correct answer because it accurately describes the electron transfer that occurs between magnesium and nitrogen during the formation of their compound.

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If the reaction is first order with respect to x and second order with respect to y, the rate law can be written as rate = k[X]⁻¹[Y]⁻².

Starting with known concentrations of x and y in experiment 1, the initial rate of formation of z was measured. The initial rate of formation of z in experiment 2 would depend on the new concentrations of x and y. If the new concentrations are different from the initial concentrations used in experiment 1, the initial rate of formation of z in experiment 2 will also be different.

To determine the initial rate of formation of z in experiment 2, the rate law equation would need to be used with the new concentrations of x and y. The units of k, the rate constant, determine the units of the rate.

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--The given question is incomplete, the complete question is

"738; (1,45)(0.042 T Jath) 8518,314(308) 4 OO (3.O0)L85) Ttn (0.0821)(35.0) Enic snele Initial Rate of (Ylo Formation of (moLL- sec 0.101 9l 0.20 Experiment (Xlo 0.40 0.20 The table above shows the results from rate study of the reaction X+Y 2. Starting with known concentrations of X and Y in experiment 1,the rate of formation of Z was measured. If the reaction was first order with respect to( X and second order with respect t0_Y! the initial rate of formation of 2 experiment 2 would be (A) R (B) 2 Cx]" [Y]' 2R Y 1 = 2 1 4R."--

Answer:

Often a chemist needs to heat materials. The Bunsen Burner is one of the most efficient ways of doing this.

Explanation:

Answer:

Explanation:

Does order matter in chemical formula?

When you write a chemical formula, there is a specific order of the elements. ... The Hill system states carbon atoms are listed first, hydrogen atoms next and then the number of all other elements in alphabetical order

Answer:

Charges that are opposite each other, such as positive and negative charges, draw each other. Like charges repel each other, such as two negative charges or two positive charges.

Explanation:

Answer:

Opposite electric forces attract each other.

Like if it's positive and negative they will come together.

If they are the same(positive and positive or negative and negative) they will repel each other.

Explanation:

Sodium is highly electropositive thus it can easily give out one electron from the outermost shell of the atom of the element.

We know that sodium is an element that has been found to be a member of group one of the periodic table. This implies that the sodium has only one electron in the outermost shell of the atom. As such, the sodium atom is quite very reactive and we observe that the sodium atom does loose electron easily.

The elements that are in the first group of the periodic table are highly electropositive and  this is what informs the fact they have a tendency to loose electrons quickly.

When the sodium atom looses an electron, it forms a univalent positive ion and there is a loss of an entire shell and this is why we find out that sodium does not occur in a free sate in nature owing to the fact that it tends to react very much.

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Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.

Tectonic pressure in a crust can cause folding. Folding can end up with  the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.

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Answer:

1) Liquid forms drops that are dome-shaped

2) low surface tension

3) low viscosity

4) Liquid is thick and pours very slowly

Explanation:

It makes sense just use the stuff that's already in the table. It usually works.

Answer:

Answer is in the attachment

hope it's helpful

During alpha decay, the process of alpha decay results in the atomic number decreasing by two units.

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle, which is a helium nucleus.

During alpha decay, the atomic number of the element decreases by two units and the mass number decreases by four units, because an alpha particle has two protons and two neutrons.

The decay of a radioactive element by alpha decay reduces the atomic number by two units and decreases the atomic mass by four units.

Because alpha particles are positively charged helium nuclei with two protons and two neutrons, they contain two fewer electrons than their parent nuclei. The loss of two electrons, or a positive charge of +2, results in a reduction of the atomic number by two units.

Thus, atomic number decreases by 2 units during an alpha decay.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

The main answer is that the compound with a six carbon chain and a ketone on carbon 4 will not form a yellow precipitate when treated with excess iodine in the presence of NaOH.

that the yellow precipitate formed in this reaction is due to the presence of an alpha-beta unsaturated carbonyl compound, which can undergo a reaction with iodine and NaOH to form iodoform. However, the compound with a ketone on carbon 4 does not have an alpha-beta unsaturated carbonyl group, so it will not react with iodine and NaOH to form a yellow precipitate.

out of the given options, only the compound with a six carbon chain and a ketone on carbon 4 will not form a yellow precipitate when treated with excess iodine in the presence of NaOH.

The compound(s) that will not form a yellow precipitate when treated with excess iodine in the presence of NaOH are: a five carbon chain with a ketone on carbon 3 and a six carbon chain with a ketone on carbon 4.
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: When treated with excess iodine in the presence of NaOH, compounds that contain methyl ketones (RC(O)CH3) will undergo the iodoform reaction, which produces a yellow precipitate of iodoform (CHI3). In this case, the compounds with ketones on carbon 2 (both five and six carbon chains) contain methyl ketones, so they will form a yellow precipitate. However, the five carbon chain with a ketone on carbon 3 and the six carbon chain with a ketone on carbon 4 do not contain methyl ketones and will not form a yellow precipitate.

Based on the structures provided, the compounds that will not form a yellow precipitate in the reaction with excess iodine and NaOH are those with a ketone on carbon 3 in a five carbon chain and a ketone on carbon 4 in a six carbon chain.

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Answer: When two light bulbs are connected in parallel, which is true? A. The total resistance is less than the resistance of either bulb alone. B. The Voltage provided

Explanation:

Answer:

D. Only the top two bulbs would be lit.

Explanation:

When you connect the top light bulb, both the top and middle light bulbs will be lit. But, the bottom light bulb will not be lit because it is not connected. In order for a light bulb to be lit, it has to be connected on both sides by wire.

< Hope this helps! :)

A 1.00 L sample of a gas has a mass of 1.7 g at STP. The molar mass of the gas is approximately 41.6 g/mol, which is closest to option (c) 38 g/mol.

To solve this problem, we can use the ideal gas law:

PV = nRT

where P is the pressure,

V is the volume,

n is the number of moles of gas,

R is the ideal gas constant,

and T is the temperature.

At STP (standard temperature and pressure), the pressure is 1 atm and the temperature is 273 K. We also know the volume of the gas is 1.00 L and the mass of the gas is 1.7 g.

First, we can convert the mass of the gas to moles using its molar mass:

moles = mass / molar mass

Since we don't know the molar mass yet, let's call it "M":

moles = 1.7 g / M

Next, we can use the ideal gas law to find the number of moles of gas:

PV = nRT

n = PV / RT

n = (1 atm)(1.00 L) / (0.08206 L atm/mol K)(273 K)

n = 0.0409 mol

Now we can equate the two expressions for the number of moles of gas:

1.7 g / M = 0.0409 mol

Solving for M, we get:

M = 1.7 g / 0.0409 mol

   = 41.6 g/mol

Therefore, the molar mass of the gas is approximately 41.6 g/mol, which is closest to option (c) 38 g/mol.

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The evidence that indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier: Whole logs mixed in with the rocks, Clay-sized particles and An abundance of snow and ice

The following evidence indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier:

Whole logs mixed in with the rocks: The presence of whole logs mixed in with the rocks suggests a rapid and powerful flow, characteristic of a lahar, rather than the slow movement associated with glaciers.

Clay-sized particles: The presence of clay-sized particles is often associated with lahars, as they can be easily transported by the flowing volcanic material.

An abundance of snow and ice: The presence of snow and ice is indicative of a recent event, as glaciers tend to accumulate and retain snow and ice over time. In the case of a lahar, the presence of snow and ice suggests a more recent deposition.

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Valence electrons are the electrons present in the outermost shell of an atom and participate in chemical bonding. The number of valence electrons in bromine is 7, and in these molecules and ions, bromine is bonded with other elements through covalent bonds.

1. In BrF, there is one bromine atom and one fluorine atom. The bromine atom has 7 valence electrons, and it shares one electron with the fluorine atom. Thus, the bromine atom has 6 pairs of valence electrons.
2. In BrF+2, there are two fluorine atoms bonded with one bromine ion. Bromine has lost two electrons and has 5 valence electrons now. Each fluorine atom shares one electron with the bromine ion. Thus, the bromine ion has 5 pairs of valence electrons.
3. In BrF+6, there are six fluorine atoms bonded with one bromine ion. Bromine has lost six electrons and has only one valence electron now. Each fluorine atom shares one electron with the bromine ion. Thus, the bromine ion has only one pair of valence electrons.
4. In BrF−2, there are two fluorine atoms bonded with one bromine ion. Bromine has gained two electrons and has 9 valence electrons now. Each fluorine atom shares one electron with the bromine ion. Thus, the bromine ion has 7 pairs of valence electrons.
5. In BrF5, there are five fluorine atoms bonded with one bromine atom. The bromine atom has 7 valence electrons, and each fluorine atom shares one electron with it. Thus, the bromine atom has 5 pairs of valence electrons.
In summary, the number of pairs of valence electrons in the bromine atoms varies in different molecules and ions, depending on the number of atoms bonded with it and the number of electrons gained or lost by the bromine atom.

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Answer:

5 mol H₂. this is the answer bro all the best for your test/exam

The pH of the solution if a chemist dissolves 232 mg of pure sodium hydroxide in enough water to make up 60 mL of solution is 12.99.

To calculate the pH of the solution, we need to determine the concentration of sodium hydroxide (NaOH) in the solution. First, convert the mass of NaOH to moles:

232 mg NaOH × (1 g / 1000 mg) × (1 mol NaOH / 40 g)

= 0.0058 mol NaOH

Now, calculate the concentration in moles per liter (M):

0.0058 mol / 0.060 L = 0.097 M NaOH

Since NaOH is a strong base, it will completely dissociate into Na⁺ and OH⁻ ions. Thus, the concentration of OH⁻ ions is also 0.097 M.

Next, we need to calculate the pOH of the solution using the OH- concentration:

pOH = -log10[OH⁻]

= -log10(0.097)

≈ 1.01

Finally, to find the pH, we use the relationship between pH and pOH at 25°C:

pH + pOH = 14

So, the pH of the solution is:

pH = 14 - pOH

= 14 - 1.01

≈ 12.99

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Answer:

11.76% by weight in salt

Explanation:

concentration = mass of solute / mass of solute + mass of solvent

mass of solute = 20 grams

mass of solvent = 150 grams

mass of solute + mass of solvent = 20g + 150g = 170g

concentration (weight %) =  (20g / 170g)100% = 11.76% by weight in salt.

The atomic or hybrid orbitals make up the sigma bond between C1 and C2 in ethane , CH₃ - CH₃ are one s orbital and 3 p orbital.

The carbon single bond carbon are saturated hydrocarbon. the atomic orbital involves in the hybridization is one s orbital and 3 p orbital . the hybridization is sp³.  the ethane molecule, CH₃ - CH₃ , both the carbon in the ethane molecule are  sp³ hybridize.  the approximate bond angle of the H - C1 - C2 bond is 109.5°.

Thus, the atomic hybrid orbital in  C1 - C2 of ethane molecule is 1 s orbital and 3 p orbital. the hybridization of the both the carbon atoms in ethane is sp³ hybridize.

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Answer:

Atomic radii increase in size as you progress down the columns of the periodic table. This is because as you add more electrons, and fill more electron shells, the total radius across the atom increases.

Answer:

lithium because it atomic number is 3

The boiling point of water decreases with increasing elevation. At an elevation of 1.25×104 ft (feet), the boiling point of water is lower than the standard boiling point of 100 degrees Celsius (212 degrees Fahrenheit) at sea level.

The specific boiling point at this elevation can be determined by considering the relationship between atmospheric pressure and boiling point. The boiling point of a substance is influenced by atmospheric pressure. At higher elevations, the atmospheric pressure decreases because there is less air above. As a result, the boiling point of water also decreases. This occurs because the lower atmospheric pressure reduces the pressure exerted on the water's surface, allowing it to vaporize at a lower temperature.

To determine the precise boiling point at an elevation of 1.25×104 ft, additional information is needed, such as the atmospheric pressure at that specific location. The relationship between atmospheric pressure and boiling point is not linear, and a more detailed understanding of the atmospheric conditions is required to provide an accurate boiling point value.

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The reaction between limestone and HCl acid occurs due to the presence of calcium carbonate in limestone, which reacts with the hydrochloric acid to form calcium chloride, carbon dioxide, and water.

Limestone, a sedimentary rock, primarily consists of calcium carbonate (\(CaCO_3\)). When limestone comes into contact with hydrochloric acid (HCl), a chemical reaction takes place. The reaction can be represented by the following equation: \(CaCO_3 + 2HCl\) → \(CaCl_2 + CO_2 + H_2O\).

In this reaction, the acidic properties of hydrochloric acid (HCl) are showcased as it donates hydrogen ions (H+) to the carbonate ions (\(CO3^2^-\)) present in limestone. This proton transfer leads to the formation of calcium chloride (\(CaCl_2\)), carbon dioxide \((CO__2)\), and water (\(H_2O\)). The carbon dioxide produced is responsible for the effervescence or bubbling observed during the reaction.

This reaction is a common demonstration of acid-base chemistry and the reactivity of calcium carbonate. Limestone is known for its susceptibility to dissolution in acidic solutions due to the presence of calcium carbonate. Understanding these chemical reactions is essential in various scientific fields, including geology, chemistry, and environmental science.

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The order from lowest to highest pH (or highest to lowest acidity) for the given items is:

Soap (pH around 10-11)

Milk (pH around 6.5-6.7)

Blood (pH around 7.35-7.45)

Coffee (pH around 4.5-5.0)

So the correct order is: coffee, milk, blood, soap.

Acids and bases are substances that have opposite properties, with acids having a sour taste, ability to corrode metals, and ability to change litmus paper from blue to red, while bases have a bitter taste, feel slippery, and change litmus paper from red to blue. The pH scale is used to measure the acidity or basicity of a substance, ranging from 0 to 14, with 7 being neutral, values below 7 being acidic, and values above 7 being basic.

In the given list of items, soap has the highest pH and is the most basic, followed by milk, blood, and coffee. Soap is a common household item that is used for cleaning, and it is alkaline in nature, with a pH of around 9-10. Milk is slightly acidic, with a pH of around 6.5-6.7, while blood has a slightly basic pH of around 7.35-7.45, which is crucial for maintaining the body's pH balance. Coffee is acidic, with a pH of around 5.0, which gives it a slightly bitter taste.

Understanding the pH scale and the properties of acids and bases is important in various fields, including chemistry, biology, and medicine, as it helps in the understanding of chemical reactions, body function, and the effects of substances on the environment.

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Chemicals are not supposed to be poured down the drain.

Chemicals should not be poured down the drain. This can cause harm to the plumbing system, sewage treatment plants, and the environment. Dispose of household chemicals properly by taking them to a designated recycling center or household hazardous waste collection event.

Thus the action that have been undertaken by Thomas and Trenton  is quite wrong since the chemicals that they have poured down the drain could lead to an environmental hazard.

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Answer:

Boiling point.

Explanation:

Flammability, reactivity and toxicity are all chemical properties!

The correct option is (d) Carbon Dioxide.

Explanation:

The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.

Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).

As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.

Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.

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