If 62.1 grams of magnesium react with 100.0 grams of magnesium, how many grams of product are produced?
Which is the Limiting reactant?

Which is the Excess reactant?

How many grams of excess reactant remain?

PLS help with homework

Answer:

B

Explanation:

Option B is correct because you have 6 vertices, indicating that there ate 6 carbons in the compound.

Answer:

4

Explanation:

please mark brainiest

K(s) + 2HCl(aq) ----> 2KCl (aq) +H2(g) is an example of single replacement reactions.

A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound.

Single-replacement reactions always involve two pure elements and one aqueous compound/solution. In the above reaction, the A and C would be pure elements.

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

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Answer:

heat is mesured in calories and also joules

Explanation:

Answer:

68.4°C is the final temperature of the water

Explanation:

In this problem, the heat lost by the water is equal to the heat lost by the sample of glass, that is:

W(Gl)*S(Gl)*ΔT(Gl) = W(H₂O)*S(H₂O)*ΔT(H₂O)

Where W is mass (Gl = 33.0g; H₂O = 200.0g)

S is specific heat (Gl = 0.670J/g°C; H₂O = 4.184J/g°C)

And ΔT is change in temperature ( Gl = T-7.6°C; H₂O = 70.0°C-T)

Replacing:

33.0g*0.670J/g°C*(T-7.6°C) = 200.0g*4.184J/g°C*(70.0°C-T)

22.11*(T-7.6) = 836.8*(70.0-T)

22.11T - 168.04 = 58576 - 836.8T

858.91T = 58744.04

T = 68.4°C is the final temperature of the water

The factory had a negative effect on all the populations in the ecosystem. This is the effect of a new factory on a wetland ecosystem.  Therefore, the correct option is option A.

A wetland is a composite ecosystem that also contains ecosystems related to hydrology, soil, vegetation, or biology. The rate of urbanisation in China's national economic growth process is now rising quickly, so by the end of 2021, the country's resident population will have an urbanisation rate of 64.72%. The factory had a negative effect on all the populations in the ecosystem. This is the effect of a new factory on a wetland ecosystem.

Therefore, the correct option is option A.

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A blowtorch flame at 1300°C is hotter than a candle flame at 1830°F.

To compare the two temperatures, we need to convert one of them to the same unit as the other. We can convert 1300°C to °F by using the formula:

°F = (°C × 1.8) + 32

Plugging in 1300°C, we get:

°F = (1300 × 1.8) + 32 = 2372°F

So the blowtorch flame is 542°F hotter than the candle flame.

Alternatively, we can convert 1830°F to °C by using the formula:

°C = (°F - 32) ÷ 1.8

Plugging in 1830°F, we get:

°C = (1830 - 32) ÷ 1.8 = 999°C

So the candle flame is 301°C cooler than the blowtorch flame.

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Answer:

It has 17 protons, 17 electrons, and 18 neutrons/ 35 protons, 35 electrons, and 17 neutrons. 21. Phosphorus-33 (atomic number 15) contains 18 neutrons/ 18 protons

Answer:

the energy released is to make steam to create electricity. yes you are right i just didnt feel like being super technical

In a nuclear reaction, the  direct function of the energy released from the nuclear chain reaction in a nuclear power plant is turning the blades of the turbine heating water to produce steam .

There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.

In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.

In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.

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A mineral is a substance such as tin, salt, or sulphur that is formed naturally in rocks and in the earth. Minerals are additionally observed in small portions in food and drink.

Minerals are integral for three essential reasons: building robust bones and teeth. controlling physique fluids inside and outdoor cells. turning the meals you devour into energy.

Minerals are necessary for your body to remain healthy. Your physique uses minerals for many one of a kind jobs, which include maintaining your bones, muscles, heart, and talent working properly. Minerals are additionally necessary for making enzymes and hormones. There are two types of minerals: macrominerals and hint minerals.

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136 g Al₂O₃ grams of al203 form from 64.0 g o2

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The new volume of the balloon, given that it was taken to a mountain where the temperature is 8 °C and 0.74 atm is 3.2 L

The new volume of the balloon can be obtained by using the combined gas equation as follow:

P₁V₁ / T₁ = P₂V₂ / T₂

(1 × 2.5) / 298 = (0.74 × V₂) / 281

Cross multiply

298 × 0.74 × V₂ = 1 × 2.5 × 281

Divide both side by (298 × 0.74)

V₂ = (1 × 2.5 × 281) / (298 × 0.74)

V₂ = 3.2 L

Thus, the new volume will increase to 3.2 L

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The number of moles of hydrogen gas produced from 1.2 g of water is 0.06 moles. Then, the partial pressure of hydrogen gas is 4.9 atm.

The partial pressure of a gas in a mixture is the contribution of the gas to the total pressure of the mixture.

The molar mass of water = 18 g/mol

mass = 1.2 g

number of moles  = 1.2/18 =0.06 moles.

now the total pressure p = nRT/v

V = 0.20 L

T = 30°C =303 K

then  p = (0.06 mol × 0.082 L atm/ K mol × 303 K) / 0.20 L = 7.4 atm.

Now, 2 moles of water gives 2 moles of hydrogen gas and one mole of oxygen. Then 0.06 moles of water gives 0.06 moles of hydrogen and 0.03 moles of oxygen.

Then, mole fraction of hydrogen = 0.06/(0.03 + 0.03) = 0.66.

Partial pressure of hydrogen = total pressure × mole fraction

= 0.66 × 7.4 atm = 4.9 atm.

Therefore, the partial pressure of hydrogen gas is 4.9 atm.

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The mass of NaCl in 44mL of a 1.6M solution is 4.1grams.

The mass of NaCl can be calculated by using the following formula;

Molarity = no. of moles ÷ volume

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

no of moles = 1.6M × 0.044L = 0.07moles

The mass of the sodium chloride solution can be calculated by multiplying the molar mass of the salt by the number of moles present in the solution.

The molar mass of NaCl solution can be calculated as follows;

M.M = 23g/mol + 35.5g/mol = 58.5g/mol

mass of NaCl = 58.5 × 0.07 = 4.1grams.

Therefore, 4.1grams is the mass of NaCl solution.

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The median reaction at the second end point in the HCl and NaOH titration is: HCl + NaOH → NaCl + H2O

In a titration between hydrochloric acid (HCl) and sodium hydroxide (NaOH), the reaction involved is the neutralization reaction between an acid and a base. The balanced equation for this reaction is:

HCl + NaOH → NaCl + H2O

In this reaction, one mole of HCl reacts with one mole of NaOH to form one mole of NaCl (sodium chloride) and one mole of water.

During the titration process, the reaction occurs gradually as the base is added to the acid solution.

The first end point of the titration is reached when the moles of HCl and NaOH are stoichiometrically equivalent, meaning they react in a 1:1 ratio. At this point, all the HCl has been neutralized by the NaOH, and no excess of either reagent remains.

However, if the titration is continued beyond the first end point, the reaction between HCl and NaOH can still occur, albeit in a different ratio.

The second end point refers to the point where the moles of NaOH added exceed the stoichiometrically required amount to neutralize the HCl completely. As a result, any excess NaOH added after the second end point reacts with the excess HCl in a 1:1 ratio.

Therefore, the median reaction at the second end point in the HCl and NaOH titration is:

HCl + NaOH → NaCl + H2O

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The phases of nitrogen in order of increasing density is solid, liquid, and gas.

In conclusion, the correct option is D.

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A type of fossil fuel,known as Tar stands.

A fossil fuel is a hydrocarbon-containing material formed naturally in to  the Earth's crust from to the  remains of dead plants and animals and birds that is the  extracted and burned as thr  a fuel. The main fossil  fuels are mainly coal, oil, and natural gas.

Tar sands are a combination of clay, sand, water and bitumen, which is a heavy hydrocarbon. Like the  kerogen in oil shale, tar sands' bitumen can be upgraded to synthetic crude oil.

So answer is tar sands.

These include tar sands – deposits of moist sand and it is  clay with 1-2 percent  bitumen (thick and heavy are  petroleum rich in the  carbon and poor in the  hydrogen). These are the  removed by strip mining in the  (see section below on coal)

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Answer:

i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.

Answer:

True

Explanation: The limitations of our size compared to our research subject can be overcome by building models of the subject under question. Models can be smaller versions of things to large to recreate (planets, planes, etc.) or too small to see (molecular structures, insects, etc.)

Answer:

3287.04 grams

Explanation:

The mass of 3.21 × 10²⁴ molecules of potassium hydroxide is equal to  298.5 g.

Avogadro’s constant can be explained as the proportionality factor that can be used to count the number of particles such as molecules, atoms, or ions in a given sample with a definite amount of substance.

Avogadro's number can be described as the approximate number of nucleons in 1 gram of substance. The value of the Avogadro constant can be expressed as the mass of one mole of a compound, in grams.

The value of Avogadro’s number is found about 6.022×10²³ mol⁻¹.

Given, the number of molecules of the KOH = 3.21 × 10²⁴

The mass of the one mole of KOH = 56 g/mol

The 6.022 × 10²³ molecules of KOH has mass = 56 g

The mass of 3.21 × 10²⁴ molecules of KOH = 56×(3.21× 10²⁴/6.022 × 10²³)

= 298.5 g

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Answer: NaOH can be classified as a strong base considering the ions it forms when it dissociates and its level of dissociation. The best option to answer the question is letter C.

Explanation:

The question requires us to choose, among the options given, which one best describes sodium hydroxide (NaOH), knowing that this compounds completeley dissociates into positive and negative ions.

When NaOH dissociates, the ions Na+ and OH- are formed, according to the following dissociation reaction:

Since the dissociation of NaOH forms anions OH-, we can say it is a base. Also, since the dissocation of NaOH into its ions is complete, we can say that it is a strong base.

Therefore, NaOH can be classified as a strong base considering the ions it forms when it dissociates and its level of dissociation. The best option to answer the question is letter C.

Answer:

Quantitative

Explanation:

quantitative is example of measuring length

The sample response is : how do mass and the type of material affect thermal energy transfer?

So one need to have include the below factors in your answer:

The mass of an object influences allure thermal strength transfer traits. Generally, objects accompanying best public have greater warm strength depository volume.

They can absorb more heat strength before experience a meaningful change in hotness. If an equal amount of heat is used to both objects, the object accompanying better mass will demand more heat strength to raise allure temperature distinguished to the object accompanying tinier mass .

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. In this experiment, you need to examine the idea of the thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, be limit your question to only two. What did you include in your question?

Answer:

787.401575 inches

Many island chains were formed as a result of blank volcanism is known as hotspot volcanism.

Hotspot volcanism occurs when a mantle plume, a column of hot and buoyant rock material rising from deep within the Earth's mantle, reaches the surface. These mantle plumes are stationary relative to the moving tectonic plates on the Earth's surface.

As the tectonic plate moves over the stationary hotspot, the mantle plume melts and produces magma. This magma rises through the Earth's crust, creating a volcanic eruption. Over time, repeated eruptions build up layers of lava and volcanic material, forming a cone-shaped volcano. As the tectonic plate continues to move, the volcano becomes inactive, and a new volcano forms above the stationary hotspot.

However, in the case of island chains, the tectonic plate movement carries the volcanoes away from the hotspot. As a result, a trail of extinct volcanoes is left behind, forming a linear chain of islands. Each island in the chain represents a period of volcanic activity at that specific location as the plate moved over the hotspot.

Hotspot volcanism and the formation of island chains provide valuable insights into the dynamics of Earth's mantle and plate tectonics. By studying the age progression of islands in a chain, scientists can gain a better understanding of the movement and speed of tectonic plates and the behavior of mantle plumes deep beneath the Earth's surface.

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Explanation: The concentration of a solution helps us to determine the collision speed between particles in a molecule or compound. Knowing the concentrations of components in solutions can help determine the health of the world.

Answer: 6.02214076 atoms Ca

Explanation:

Ca is monoatomic, so atoms in 1 mol = avogadro number

The half reaction with a more positive standard reduction potential will proceed spontaneously in a redox reaction

The half reaction with a more positive standard reduction potential will undergo reduction when compared to the half reaction with a more negative standard reduction potential.

Oxidation-reduction reactions, often known as redox reactions, are a set of chemical reactions that involve electron transfer between reactants. In a redox reaction, one reactant is oxidized, losing electrons, while the other reactant is reduced, gaining electrons.

The oxidation half-reaction is the process of losing electrons and increasing the oxidation number, whereas the reduction half-reaction is the process of gaining electrons and decreasing the oxidation number. The total reaction is referred to as the redox reaction.

Half-reaction:Half-reaction refers to the two parts of an oxidation-reduction reaction that happen separately. A half-reaction must always be either an oxidation reaction or a reduction reaction. It also describes the movement of electrons and hydrogen ions in an equation.

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The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

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Answer: ion dipole

Explanation: ck-12 said it was correct