what mass (in grams) of mg(no3)2 is present in 184 ml of a 0.350 m solution of mg(no3)2

The number of moles of HCl produces 400.0 mL of 1.5M MgCl₂ is equal to 1.20 moles. Therefore, option (C) is correct.

A mole can be defined as a standard unit that is used to find a huge number of quantities of molecules, atoms, ions, or other particular particles.

The number of entities in one mole was found to be equal to 6.023 × 10²³ which is called Avogadro’s constant.

The chemical equation of magnesium and HCl is:

Mg (s) + 2HCl (aq) →  MgCl₂ (aq)  +  H₂(g)

The volume of the MgCl₂ solution, V = 400 ml = 0.4 L

The concentration of MgCl₂ = 1.5 M

The number of moles of MgCl₂ = 1.5 × 0.4 = 0.6 moles

One mole of MgCl₂ is produced from HCl = 2

0.6 moles of MgCl₂ is produced from HCl = 2 × 0.6 = 1.20 moles

Therefore, 1.20 moles of HCl will be reacted to produce 0.6 moles of MgCl₂.

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Answer: His decision to add a fence to prevent his cows from straying will result in a long-term decline in the bobcat population. Most likely, the cows are being preyed upon by the bobcats when they stray and are fed in return. Because the cows are unable to cross a particular limit when the farmer constructs a fence, bobcats have less opportunity to hunt the cows.

Explanation:

Answer:

3.2 M

Explanation:

M1V1=M2V2

1.8*.445=.801

.801/.25=3.204

Molarity = M2 = 3.2 M

Answer:

D) Temperature,

Explanation:

The solution has a molarity of around 1.52 M.

To calculate the molarity of a solution, we need to determine the number of moles of the solute (calcium oxide) and divide it by the volume of the solution in liters.

First, we need to convert the given mass of calcium oxide into moles. The molar mass of calcium oxide (CaO) is 56.08 g/mol.

Number of moles of CaO = mass of CaO / molar mass of CaO

= 340 g / 56.08 g/mol

≈ 6.07 mol

Next, we divide the moles of CaO by the volume of the solution in liters to get the molarity.

Molarity = moles of solute / volume of solution (in liters)

= 6.07 mol / 4.00 L

≈ 1.52 M

Therefore, the molarity of the solution is approximately 1.52 M.

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I think it is newtons but not that sure

Answer:

Gravity

Explanation:

I remembered from quizlet.

Answer:

C

Explanation:

Neon is a noble gas, which is monoatomic.

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

body temperature and energy

Answer:c. At 20% efficiency, how many kWh would actually be produced from the 5 gal of gasoline? How many BTUs of heat would be released from burning the gasoline? (3 points) 1.3 x 10 J x 1 kWH / 3.6 x 10 J = 36.1 kWh 5.2 x 10 J x 1 BTU / 1055 J = 492891 BTU 36.1 kWh would actually be produced from 5 gallons of gasoline.

Explanation:

I hope I help

The standard enthalpy of reaction for a system in which increasing the temperature by 15 K reduces the equilibrium constant by half, relative to its value at 310 K is -0.956 kJ/mol.

Given: ΔT = 15 K and ∆K/K = 1/2

Temperature is directly proportional to equilibrium constant K,

So, ∆T/T = ∆K/K

This can be written as ∆K/K = ΔH°/R × (1/T2 − 1/T1)

On solving this equation, we getΔH° = −2.303 × R × ΔK/K × T2T2 = 310 + 15 = 325 K∆K/K = 1/2∆H° = −2.303 × 8.314 J mol−1 K−1 × 1/2 × 325 K∆H° = −955.7 J mol−1= −0.956 kJ/mol

Therefore, the standard enthalpy of reaction for a system in which increasing the temperature by 15 K reduces the equilibrium constant by half, relative to its value at 310 K is -0.956 kJ/mol.

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Salt, sugar, baking soda, etc. Some also consider honey, tap water, and vegetable oil as pure substances.

The relative atomic mass of hydrogen 1.00

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit

Here given data is

99.30% of H atoms

0.70% H atoms

So we have to calculate the relative atomic mass of hydrogen. = ?

So the relative atomic mass = (isotope abundance × isotope mass) + (isotope abundance × isotope mass)

Relative atomic mass = (99.30% × 1) + (0.70% × 1)

Relative atomic mass = 1.00

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Answer:

x = 25.02 or 25°c

Explanation:

Given:

mass of water : 7.50×10² =750 gm

Ccal = 8.20× 10² = 820 J/°c

Let assume final temp = x°c

then, heat gained by the water + heat gained by calorimeter

= 25400 J

⇒ Mw × Cw× ΔTw+ Ccal ×ΔT = 25400

⇒ 750× 4.184 × (x - 18.6) + 820 ×(x-18.6) = 25400

⇒ x = 25.02 or 25°c

Answer:

B. Protons and Neutrons

Answer:

Option"B" is correct.

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Answer:

Products

Explanation:

The end results of a chemical reaction are called products

-> In chemistry, a product is a substance that is formed as the result of a chemical reaction.

-> Not many other ways to word this as it is a definition

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

Products

General Formulas and Concepts:

Reactions

Reactants and Products in RxNs

Explanation:

The substances used in a chemical reaction is called the reactants, usually located on the left side of the arrow (if pointing right).

The substances produced in a chemical reaction is called the products, usually located on the right side of the arrow (if pointing right).

RxN examples:

Reactant + Reactant → Product + Product

Reactant + Reactant → Product

Reactant → Product + Product

Topic: Honors Chemistry

There are several steps to draw lewis dot structure of any chemical compound. Here, we taking RbF.  Structure is given below with the image.

1. Start by writing the chemical symbol for the element at the center of the structure. In this case, it is Rb for Rubidium.

2. Draw dots around the symbol to represent the valence electrons. Rb has one valence electron, so you would put one dot around the Rb.

3. Next, write the chemical symbol for the other element in the compound, in this case F for Fluorine.

4. Draw dots around the symbol to represent the valence electrons. Fluorine has 7 valence electrons, so you would put 7 dots around the F.

5. To create the bond between the two elements, use a pair of dots to connect the Rb and F. This represents the sharing of electrons between the two elements.

So the Lewis dot structure for RbF would be represented as:

        . .

Rb+ [:F:]

        . .

This representation shows that Rb and F share one pair of electrons, forming a bond between them, and the dots around Rb and F represent the remaining number of valence electrons that are not involved in the bond.

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2H2O(l)⟶O2(g)+4H+(aq)+4e−This is the required balanced half-reaction  for the oxidation of liquid water to gaseous oxygen in acidic aqueous solution.

Antoine Lavoisier coined the term "oxidation" in order to describe a substance's reaction with oxygen.   For instance, when iron metal oxidizes, iron oxide is created and is referred to as rust. It lowers oxygen.

H2O(l)⟶O2(g)

To balance this, we will first balance the number of oxygen atoms.

2H2O(l)⟶O2(g)

Now we have to balance the hydrogen atoms. Since the reaction takes place in an acidic aqueous medium, hydrogen will be present in the form of its ions, dissolved in the aqueous medium.

2H2O(l)⟶O2(g)+4H+(aq)

Now the atoms on either side are balanced, but the charges are not. The products have a charge of +4 whereas the reactant is neutral. So, to balance the charge, we will add electrons to the products side, which was expected since, in an oxidation reaction, electrons are released.

2H2O(l)⟶O2(g)+4H+(aq)+4e−

This is the required balanced half-reaction.

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Ionic solids use regular, repeating patterns to create crystal-like structures. Therefore, lattice structure of FeS  is of cubic.

Ionic solids would those be crystalline solids that include ions with opposite charges that are kept together by intense electrostatic forces of attraction. (ionic bonds). Examples: Ionic solids like NaCl, KBr, etc. have crystals. Describe how the anions and cations are arranged using a clear geometric design.

Describe how the anions and cations are arranged using a clear geometric design. They thus exist at room temperature as crystalline solids. They never exist as liquids or gases under normal pressure and temperature circumstances. Lattice structure of FeS is of cubic.

Therefore, lattice structure of FeS  is of cubic.

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Answer:

THE SPECIFIC HEAT OF THE METAL IS 0.14 J/g K

Explanation:

First, write out the variables in the question

Mass of sample = 18 g

Initial temp of metal = 96°C = 96 + 273 = 369 K

Mass of water = 21 g

Initill temp of water = 24°C = 24 + 273 K = 297 K

final temp of water and metal  = 26°C = 26 + 273 K = 299 K

temperature change = (

In calorimetry, there is conservation of energy and heat liberated by one is absorbed by the other. That is heat gained is equals to heat lost.

Heat lost by the metal = Heat gained by water

mc ΔT = mc ΔT

18 * C * ( 299 - 369 ) = 21 * 4.2 * ( 299 - 297)

18 * C * -70 = 21 * 4.2 * 2

-1260 C = 176.4

C = 176.4 / 1260

C = 0.14 J/ g K

The specific heat of the metal is hence 0.14 J/g K

The given oxygen atom with 8 protons, 8 neutrons, and 8 electrons would be classified as a neutral atom. Option C is correct.

This is because in a neutral atom, the number of protons (which determines the atomic number) and electrons are equal, resulting in a net charge of zero. In this case, the oxygen atom has 8 electrons to balance out the 8 protons, resulting in a neutral charge.

Oxygen is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element that readily forms compounds with other elements, particularly with hydrogen, which makes up a large percentage of the Earth's atmosphere.

Oxygen atoms typically have 8 protons, 8 neutrons, and 8 electrons, resulting in a neutral charge. The electrons in the outermost shell of the oxygen atom determine its chemical properties and reactivity. Oxygen is highly reactive and readily forms compounds with other elements, particularly with metals, nonmetals, and organic compounds. Option C is correct.

The complete question is

Suppose an oxygen atom has 8 protons, 8 neutrons, and 8 electrons. How would it be classified?

a. positive ion

b. negative ion

c. neutral atom

d. None of the above

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The half-life of palladium-100 is 4 days. after 16 days a sample of palladium-100 has been reduced to a mass of 7 mg.

The initial mass ( in mg) of the sample is 112 mg. The mass of the sample 8 weeks after the start is approximately 0.0068 mg.

The half-life of palladium-100 is 4 days, which means that every 4 days the amount of palladium-100 in a sample is reduced by half.

Let's use N(t) to represent the mass of the sample at time t, and N0 to represent the initial mass of the sample.

Since the half-life of palladium-100 is 4 days, we know that:

N(t) = N0 * (1/2)^(t/4)

We are given that after 16 days, the mass of the sample is 7 mg. So we can plug in these values and solve for N0:

7 = N0 * (1/2)^(16/4)

7 = N0 * (1/2)^4

7 = N0 * 1/16

N0 = 7 * 16

N0 = 112 mg

So the initial mass of the sample was 112 mg.

Now we can use the same formula to find the mass of the sample after 8 weeks (which is 56 days):

N(56) = 112 * (1/2)^(56/4)

N(56) = 112 * (1/2)^14

N(56) = 112 * 1/16384

N(56) = 0.00683594 mg.

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Claim: The genotype of the mother (Lily) is Bb, and the genotype of the father is BB.

Evidence:

1. Two of Lily's children have blonde hair, which is a recessive trait. This indicates that Lily carries the recessive allele for blonde hair (b).

2. Dark hair is the dominant trait, and Lily's husband is the biological father of all three children. Therefore, the father must carry at least one dominant allele (B) for dark hair.

3. All of Lily's children share the same father, so the father must have passed on the dominant allele for dark hair to each child.

4. Since Lily and her husband have three children, and two of them have blonde hair (recessive phenotype), it is likely that Lily is heterozygous for the hair color gene (Bb), while her husband is homozygous dominant (BB).

Reasoning:

Inherited traits are determined by alleles, or alternative forms of a gene. In this case, the gene for hair color has two alleles: B (dominant for dark hair) and b (recessive for blonde hair). The presence of blonde-haired children indicates that Lily carries the recessive allele (b) for hair color, as blonde hair is a recessive trait. Since all of Lily's children share the same father and two of them have blonde hair, it suggests that the father must have passed on the dominant allele (B) for dark hair to each child. This indicates that Lily's husband is homozygous dominant (BB) for the hair color gene. Therefore, the genotype of Lily is Bb, and the genotype of her husband is BB.

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Answer:

D. in a covalent bound,electronics are shared.In ionic bounds

electrons are transfered

Explanation:

:) Hope this helps!!

The cleaning action of soaps and detergents is attributable to their ability to form micelles. Micelles are small clusters of molecules that are formed when the hydrophobic (water-repelling) tail of a soap or detergent molecule faces inward, while the hydrophilic (water-attracting) head faces outward.

This arrangement allows the soap or detergent to surround and suspend dirt, oil, and other particles in water, making them easier to remove from surfaces. Soaps and detergents do not evaporate quickly, nor do they have short hydrocarbon tails or acidic character that contribute to their cleaning action.

Therefore, their ability to form micelles is the primary reason for their effectiveness in cleaning.

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The resulting structure of Magnesium chloride after replacing Mg2+ with Na+ (sodium ion) will be slightly different due to the difference in size between Mg2+ and Na+.  

Magnesium chloride (MgCl2) is an ionic compound composed of magnesium cations (Mg2+) and chloride anions (Cl-). If the Na+ ions were replaced with Mg2+ ions in figure 1, the overall structure would remain the same as that of an ionic compound, with positive and negative ions arranged in a repeating pattern. However, the size of the Mg2+ ion is slightly larger than the Na+ ion, which may result in a slightly different arrangement of the ions in the crystal lattice. Additionally, the properties of MgCl2 would differ from those of sodium chloride (NaCl) due to the difference in the properties of Mg2+ and Na+ ions.

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Leading zero is a digit in a numerical value that are not placeholders. Digits, which comprise 0, 1, 2, 3, 4, 5, 6, 7, 8, as well as 9, are employed to represent numbers.

An arithmetic value was using to represent a quantity and to do computations is known as a number. We use numbers to count things. For instance, in the image below, there are four butterflies and one butterfly.

An element's collection of no items is represented by the symbol "0," and we refer to it as zero. Digits, which comprise 0, 1, 2, 3, 4, 5, 6, 7, 8, as well as 9, are employed to represent numbers. We utilize a set of digits known called numerals to represent numbers. Leading zero is a digit in a numerical value that are not placeholders.

Therefore, leading zero is a digit in a numerical value that are not placeholders.

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Answer:

\(75\ \text{g}\)

Explanation:

t = Time = 180 years

\(t_{1/2}\) = Half-life of titanium = 60 years

\(N_0\) = Initial amount of titanium = 600 g

We have the relation

\(N=N_0e^{-\lambda t}\\\Rightarrow N=N_0e^{-\dfrac{\ln 2}{t_{1/2}}t}\\\Rightarrow N=600e^{-\dfrac{\ln 2}{60}\times 180}\\\Rightarrow N=75\ \text{g}\)

The mass that is left after 180 years is \(75\ \text{g}\).

Answer:

187 moles NH₃

Explanation:

To find the amount of ammonia formed, you need to multiply the given value by the mole-to-mole ratio consisting of both relevant molecules. The mole-to-mole ratio is made up of the molecules' coefficients in the balanced equation. The desired unit should be placed in the numerator of the ratio. The final answer should have 3 sig figs to reflect the lowest amount of sig figs among the given values.

1 N₂ + 3 H₂ ----> 2 NH₃
^                         ^

93.5 moles N₂          2 moles NH₃
----------------------  x  -------------------------  =  187 moles NH₃
                                    1 mole N₂