Scientists need to test a new drug, but first they need to make it into an ionic compound. Below are the reactants for the experiment.
Li+MgS
What type of reaction is this?
O Synthesis
O Combustion
O Double Replacement
O Single Replacement

Answer:

Combustion is commonly called burning, and the substance that burns is usually referred to as fuel. The products of a complete combustion reaction include carbon dioxide (CO2) and water vapor (H2O).

Explanation:

make up some of your own signs which can warns people about the dangers of river an ocean a large snake hiding in the bush

Each sentence about the bioavailability of minerals in foods should be completed with either increases or decreases as follows:

Nutrients can be defined as the chemical compounds (substances) or minerals that are present in food, and they are needed by the body of a living organism for healthy growth, reproduction, development, proper functioning, and reproduction.

In Science, there are five (5) main classes of nutrients and these include the following:

In conclusion, phytic acid, oxalic acid, and refinement of grains are factors that decrease the bioavailability of minerals in foods while Vitamin C and Vitamin D increases the bioavailability of minerals in foods.

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Answer:

Then decomposition of water involves its breakdown into Hydrogen and Oxygen

The energy derived is absorbed which means it’s an endothermic reaction. If the energy is released to the surroundings/environment, it is termed as exothermic.

In an endothermic reactions, the reaction occurs when the bonds present in the reactants are broken and greater than the release of new bonds during products formation.

Considering the definition of molar mass, the correct answer is option c): the mass of 1.85 moles H₂O₂ is 62.9 grams.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

The molar mass of a compound is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

In this case, you know the molar mass of the elements is:

So, the molar mass of the compound H₂O₂ is calculated as:

H₂O₂= 2× 1 g/mole + 2× 16 g/mole

Solving:

H₂O₂= 34 g/mole

You can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 34 grams, 1.85 moles of the compound contains how much mass?

mass= (1.85 moles× 34 grams)÷ 1 mole

mass= 62.9 grams

Finally, the mass of 1.85 moles H₂O₂ is 62.9 grams.

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Answer:

Neon

Mass Number Half-life Decay Mode

Electron Capture

Electron Capture with delayed Proton Emission

18 1.6670 seconds Electron Capture

19 17.22 seconds Electron Capture

The force needed to accelerate the Toyota Camry is 7,659 N.

The force needed to accelerate the Chevy Suburban is 11,297.6 N.

The force needed to accelerate the School bus is  83,720 N.

The force needed to accelerate the Semi Truck is 193,701.4 N.

Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.

Mathematically, Newton's second law of motion is given as;

F = ma

where;

The given parameters include

The force needed to accelerate each of the cars is calculated as follows;

F ( Toyota Camry ) =  ( 1665 kg ) x ( 4.6 m/s² ) = 7,659 N

F ( Chevy Suburban ) =  ( 2,456 kg ) x ( 4.6 m/s² ) = 11,297.6 N

F ( school bus ) =  ( 18,200 kg ) x ( 4.6 m/s² ) = 83,720 N

F ( Semi Truck ) =  ( 42,109 kg ) x ( 4.6 m/s² ) = 193,701.4 N

Thus, the force needed to accelerate each cars is a function of mass and acceleration of each of the cars.

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The complete question is below;

Using Newton’s 2nd Law (F = ma) complete the following table for different types of cars. mass of the Toyota Camry, is 1665 kg, the mass of Chevy Suburban, m = 2,456 kg, the mass of school bus 18,200 kg and the mass of semi truck, m = 42,108 kg

Answer:

Yes

Explanation:

A krypton atom will remain the same despite changing the number of neutrons they contain.

The neutron is a nuclear particle found within an atom.

Answer:

a baseball soaring through the air

Explanation:

According to the passage, “Work occurs whenever something is moved and an object is put into motion.” A baseball soaring through the air is an object in motion.

An example of a situation where work occurs is a baseball soaring through the air. Therefore, option D is correct.

Work is defined as the energy that is applied to or removed from an object by applying force along a displacement. In its simplest form, it equals the product of the force's magnitude and the distance traveled for a constant force directed in the same direction as the motion.

Inertia law. Its name derives from an object's propensity to resist any change in motion up until an out-of-balance force acts on it.

A force that opposes motion is friction. Friction occurs when two moving objects come into touch and operates in the opposite direction.

The angle between force and displacement determines the kind of work that is done. Positive work occurs when a force is applied and an object is moved in that direction.

Thus, option D is correct.

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Answer:

To find the molarity of a 5% vinegar solution, you first need to determine the mass of acetic acid in the solution. To do this, you can multiply the mass of the solution by the mass fraction of acetic acid.

The mass fraction of acetic acid in a 5% vinegar solution is 5%, or 0.05. The mass of the solution is the density of the solution multiplied by the volume of the solution. Since the density of the solution is 1.01 g/mL, you can use the following formula to calculate the mass of the solution:

Mass of solution = density * volume

Once you have the mass of the solution, you can use the following formula to calculate the mass of acetic acid in the solution:

Mass of acetic acid = mass of solution * mass fraction of acetic acid

Once you have the mass of acetic acid, you can use the molar mass of acetic acid to calculate the number of moles of acetic acid in the solution. Finally, you can use the volume of the solution to calculate the molarity of the solution using the following formula:

Molarity = number of moles / volume

I hope this helps! Let me know if you have any questions.

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Answer:

Octet rule fails to explain the following:

(1) The stability of incomplete octet molecules, i.e., the molecules with the central atom containing less than eight electrons. (2) The stability of expanded octet molecules, i.e., the molecules with the central atom containing more than eight electrons.

B

i hope this helped!

None of the above are correct.

Albert Einstein supported the use of radioactive elements for medical diagnostic purposes.

I hope this helps, good luck!

The enthalpy of fusion of sodium acetate is approximately -93.64 J/g.

To calculate the enthalpy of fusion (ΔH) of sodium acetate, we can use the principle of energy conservation. The heat lost by the hand warmer during the crystallization process is equal to the heat gained by the water in the calorimeter.

First, let's calculate the heat gained by the water in the calorimeter using the formula q = m × c × ΔT, where q is the heat gained or lost, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

q_water = m_water × c_water × ΔT_water

Given:

m_water = 600 g

c_water = 4.18 J/g-°C

ΔT_water = 36.4°C - 25°C = 11.4°C

q_water = 600 g × 4.18 J/g-°C × 11.4°C

q_water = 28092 J

Since the heat lost by the hand warmer during crystallization is equal to the heat gained by the water, we can write:

q_water = q_handwarmer

Now, let's calculate the heat lost by the hand warmer using the same formula:

q_handwarmer = m_handwarmer × c_handwarmer × ΔT_handwarmer

Given:

m_handwarmer = 300 g

c_handwarmer = unknown (specific heat capacity of sodium acetate)

ΔT_handwarmer = 36.4°C - initial temperature of sodium acetate

Since the sodium acetate undergoes crystallization, its temperature remains constant during this phase change. The temperature at which crystallization occurs is known as the freezing point of sodium acetate, which is approximately 58°C. Therefore:

ΔT_handwarmer = 36.4°C - 58°C = -21.6°C

Now, we can substitute the known values into the equation:

q_water = q_handwarmer

28092 J = 300 g × c_handwarmer × -21.6°C

To solve for c_handwarmer, we rearrange the equation:

c_handwarmer = -28092 J / (300 g × -21.6°C)

c_handwarmer ≈ 5.47 J/g-°C

The specific heat capacity of sodium acetate (c_handwarmer) is approximately 5.47 J/g-°C.

The enthalpy of fusion (ΔH) can be calculated using the equation ΔH = q_handwarmer / m_handwarmer:

ΔH = -28092 J / 300 g

ΔH ≈ -93.64 J/g

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Answer:

12 moles of CO₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CO₂ + H₂O —> H₂CO₃

From the balanced equation above,

1 mole of CO₂ dissolves in water (H₂O) to produce 1 mole of H₂CO₃.

Finally, we shall determine the number of mole of CO₂ needed to produce 12 moles of H₂CO₃. This can be obtained as follow:

From the balanced equation above,

1 mole of CO₂ dissolves in water (H₂O) to produce 1 mole of H₂CO₃.

Therefore, 12 moles of CO₂ will also dissolves in water (H₂O) to produce 12 moles of H₂CO₃.

Answer:

24.31 g/mol.

Explanation:

moles =mass/molar mass

n=w/m

Answer:

dk

Explanation:

Answer:

To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.

Explanation:

Answer:

SEM provides detailed high resolution images of the sample by rastering a focussed electron beam across the surface and detecting secondary or backscattered electron signal. An Energy Dispersive X-Ray Analyzer (EDX or EDA) is also used to provide elemental identification and quantitative compositional information.

Energy Dispersive X-Ray Spectroscopy (EDS) is a chemical microanalysis technique used in conjunction with scanning electron microscopy (SEM).

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Besides functional groups, alkanes can be classified based on structural similarities. One key structural similarity is the carbon skeleton, or backbone, of the molecule. The carbon skeleton refers to the arrangement and connectivity of carbon atoms in the molecule.

Alkanes can be broadly categorized into two types: straight-chain alkanes and branched-chain alkanes. Straight-chain alkanes have a linear arrangement of carbon atoms with no branches or side chains. The carbon atoms are connected in a sequential manner, forming a simple chain. Examples include methane, ethane, propane, and butane. On the other hand, branched-chain alkanes have a non-linear carbon backbone. They possess branches, or side chains, which are additional carbon chains that deviate from the main carbon chain.

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Are there any structural similarities besides functional groups that might be used to classify the alkanes molecules? If so, what are they?

Since she suspects that the substance is cocsine, the thing that she should do next is option 1-Perform a confirmatory test.

The way that Drug evidence is collected is that from any crime scene, evidence is obtained, photographed, packaged, documented as well as been sent for analysis and then the forensic scientist will carry out the Analysis.

Since the evidence has been sent to Roshni, all she has to do is to carry out the confirmatory test to see if the drug is what she suspected.

Therefore, Since she suspects that the substance is cocsine, the thing that she should do next is option 1-Perform a confirmatory test.

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Answer:

pH of the solution is 2.0

Explanation:

The lactic acid is a weak acid that is in equilibrium with water as follows:

Lactic acid + H2O ⇄ Lactate + H₃O⁺

And Ka for lactic acid: 1.38x10⁻⁴

Ka = 1.38x10⁻⁴ = [Lactate] [H₃O⁺] / [Lactic acid]

Initial concentration of lactic acid is (MW: 112.06g/mol):

80g * (1mol / 112.06g) / 1L = 0.714M

The equilibrium concentration of the species in the equilibrium are:

[Lactate] = X

[H₃O⁺] = X

[Lactic acid] = 0.714-X

Replacing in Ka expression:

1.38x10⁻⁴ = [X] [X] / [0.714-X]

9.8532x10⁻⁵ -  1.38x10⁻⁴X = X²

9.8532x10⁻⁵ -  1.38x10⁻⁴X - X² = 0

Solving for X:

X = -1.0x10⁻². False solution, there is no negative concentrations

X = 9.86x10⁻³M. Right solution.

As [H₃O⁺] = X

[H₃O⁺] = 9.86x10⁻³M

and pH = -log [H₃O⁺] = -log 9.86x10⁻³M

pH = 2.0

Yes, that statement is generally correct. A scientific law is a statement that describes a phenomenon or pattern in nature, often expressed mathematically, without attempting to explain why it occurs. A scientific theory, on the other hand, is a well-substantiated explanation for a set of phenomena, based on empirical evidence and scientific reasoning.

A scientific law summarizes what happens in a particular situation, often in the form of an equation or formula, whereas a scientific theory attempts to explain why it happens.

For example, the law of gravity describes the attraction between masses, but it does not explain why this attraction occurs. In contrast, the theory of general relativity attempts to explain the underlying principles of gravity, including its effects on the curvature of space-time.

It's worth noting that both scientific laws and scientific theories are based on empirical evidence, but they serve different purposes in scientific inquiry. Laws describe what happens in a particular situation, while theories attempt to explain why it happens.

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Answer: NaHCO3 = Na2CO3 + H2O + CO2

Answer:

4 millllllermeeters jb

The compound magnesium chloride is produced when magnesium and chlorine interact. Below is a formula for the equation. Mg+Cl2→MgCl2.

To determine accuracy or systematic error, an experiment using different methodologies is conducted.

If a significant difference exists between an experimental average and the population mean (), also known as the "true value," the t-test is employed to ascertain this. With the help of standard reference materials and quality control standards, this method is used to assess the findings of experiments.

In the range of research techniques currently employed in science, comparative studies play a crucial role. They enable scientists to use a treatment-control design in circumstances where experimentation is not an option, and they can offer priceless knowledge on the relationships between variables.

To determine accuracy or systematic error, an experiment using different methodologies is conducted. To see how this experiment works with the others, review MV - The Experimental Plan.

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Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.