How much acceleration does a 10 kg object have if pushed by a 75 N force?

Answer:

Explanation: Carbon and silicon BOTH come from Group 14 of the Periodic Table , i.e. both formally have the same number of valence electrons, 4 such electrons.........

The two functional groups that the aminoacid has according to the picture are amine and carboxyl.

In chemistry and related areas, a functional group can be defined as a group of atoms bonded in a specific molecule that can affect the was the molecule reacts or the specific behavior of it.

In the case of the molecule presented, which is an amino acid, two functional groups can be identified:

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Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Answer:

47900 cm

General Formulas and Concepts:

Chemistry

Explanation:

Step 1: Define

0.479 km

Step 2: Identify Conversions

1 km = 1000 m

1 m = 100 cm

Step 3: Convert

\(0.479 \ km(\frac{1000 \ m}{1 \ km} )(\frac{100 \ cm}{1 \ m} )\) = 47900. cm

Step 4: Check

We are given 3 sig figs. Follow sig fig rules.

47900. cm ≈ 47900 cm

Energy is the quantity that denotes the ability to do work and is measured in a Joules.

The energy which arises due to motion of atoms or molecules in a body is known as thermal energy. It is a measure of kinetic energy of the particles. It increases with increase in temperature.

Electrical energy is a type of kinetic energy caused by moving electric charges. The amount of energy depends on the speed of the charges.

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Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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the pH of the aqueous solution is 8.51 with a hydrogen ion concentration of [H+]=3.1×\(10^-9\)M

The pH of the aqueous solution can be calculated using the formula:

pH = -log[H+]

where [H+] is the hydrogen ion concentration of the solution.

Substituting the given value, we get:

pH = -log(3.1×\(10^-9\))

pH = 8.51

An aqueous solution is one in which water serves as the solvent. It is utilised in a variety of applications, including analytical chemistry, biochemistry, and industrial chemistry. It is the most prevalent kind of solution used in chemical reactions. Water serves as both the solvent and the solute in an aqueous solution, where the solute is often a solid, liquid, or gas. Due to its high polarity and capacity to make hydrogen bonds with other molecules, water is an excellent solvent that can dissolve a variety of materials, including polar molecules and ionic compounds. Acid-base reactions, redox reactions, and precipitation reactions are just a few of the numerous chemical processes that take place in aqueous solutions. A variety of variables can have an impact on an aqueous solution's characteristics.

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Answer:

The final volume in mL is 7.14 mL or 7.1 mL.

Explanation:

1.Use Boyle's Law(\(P_{1} V_{1}= P_{2} V_{2}\)). Re-arrange to solve for \(V_{2}\) for the final volume.

2. Plug in values. \(V_{2} =\frac{(2.7 atm)(4.5 mL)}{(1.7 atm)} = 7.14 mL\)

Answer:

21.44× 10² atoms

Explanation:

Number of chromium atoms = ?

Moles of potassium chromate = 3.56 × 10⁻²¹ mol

Solution:

1 mole of K₂CrO₄ contain 1 mole of Cr.

3.56 × 10⁻²¹ moles of K₂CrO₄ contain 3.56 × 10⁻²¹  moles of Cr.

Number of atoms of Cr:

1 mole contain 6.022× 10²³ atoms

3.56 × 10⁻²¹ mole ×  6.022× 10²³ atoms / 1mol

21.44× 10² atoms or 2144 atoms

The amount of heat transferred to the sample of sodium is 332,699.149.

The amount of heat absorbed or released by a substance can be calculated using the following formula;

Q = mc∆T

Where;

According to this question, 898.3g sample of sodium experiences a temperature change of +301.11 K. The specific heat capacity of sodium is 1.23 J/(g-K).

Q = 898.3 × 1.23 × 301.11

Q = 332,699.149 J

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Answer: An electron con only exist in a limited number of quantized energy levels.

Explanation:

You would recover 36.525g of NaCl after evaporating all of the water.

To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:

mass = moles * molar mass

Where:

Moles = Molarity * Volume

Molarity = 0.250 M

Volume = 2500.0 mL = 2.5 L

Molar mass of NaCl = 58.44 g/mol

mass = 0.250 M * 2.5 L * 58.44 g/mol

mass = 36.525 g

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Answer:

Erosion is the transportation of sediment at the Earth's surface. 4 agents move sediment: Water, Wind, Glaciers, and Mass Wasting (gravity).

Explanation:

Answer:

Erosion is a process where materials are worn away and transported by natural forces such as wind or water

Explanation:

Answer

2.04782 x 10²⁴ molecules

Explanation

According to Avogadro,

1 mole of any substance contains 6.023 × 10²³ molecules

So 3.4 moles of CO2 will contain

There are 2.04782 x 10²⁴ molecules of CO2 in 3.4 moles of CO2.

Answer:

133.34 g/moles

Explanation:

but to make life easy it could be 133.4 g/ moles as well

Answer:

where is diagram. sorry.

When the combined vapour pressure of a miscible liquid mixture reaches atmospheric pressure, the solution boils. This vapour pressure denotes the boiling pressure in a mixture.

The air pressure directly impacts a liquid's boiling point. The weight of the air molecules above the liquid is the factor putting more pressure on the liquid. This is considered to as atmospheric pressure in an open system. The higher the boiling point and the more energy needed to bring liquids to a boil, the higher the pressure.

Because volatile compounds regularly have different boiling points, when a mixture is distilled, the components commonly separate from the mixture. The temperature at which the external pressure operating on the surface of a liquid equals the vapour pressure of the liquid phase of a compound is termed as the boiling point.

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The temperature changes for the water and the metal can be calculated by subtracting their initial temperatures from the final temperature.

AT (water) = √°C - °℃

AT (metal) = √°C - °℃

The above equations give the temperature changes for the water and the metal, respectively. The specific values of the temperatures and the final temperature are not provided, so the actual temperature changes cannot be determined without knowing these values.

In general, the temperature change of a substance is given by the difference between the final and initial temperatures. When a warmer object comes into contact with a cooler one, heat energy is transferred from the warmer object to the cooler one until they reach thermal equilibrium, where their temperatures become equal.

The magnitude of the temperature change depends on factors such as the specific heat capacity of the substances involved and the amount of heat exchanged between them.

To accurately calculate the temperature changes, the specific heat capacities of water and the metal would be needed. Additionally, the masses or quantities of the substances would be necessary to determine the amount of heat exchanged. Without these specific values, it is not possible to provide a precise numerical answer.

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The percent composition of CuBr₂ is approximately 28.46% of Cu and 71.54% of Br.

To determine the percent composition of CuBr₂ (copper(II) bromide), we need to calculate the mass of each element in the compound and then divide it by the molar mass of the entire compound.

The molar mass of CuBr₂ can be calculated by adding up the atomic masses of copper (Cu) and bromine (Br) in the compound. The atomic masses of Cu and Br are approximately 63.55 g/mol and 79.90 g/mol, respectively.

Molar mass of CuBr₂ = (63.55 g/mol) + 2(79.90 g/mol) = 223.35 g/mol

Now, let's calculate the percent composition of each element in CuBr₂:

Percent composition of copper (Cu):

Mass of Cu = (63.55 g/mol) / 223.35 g/mol × 100% ≈ 28.46%

Percent composition of bromine (Br):

Mass of Br = 2(79.90 g/mol) / 223.35 g/mol × 100% ≈ 71.54%

Therefore, the percent composition of CuBr₂ is approximately:

- Copper (Cu): 28.46%

- Bromine (Br): 71.54%

These values represent the relative mass percentages of copper and bromine in the compound CuBr₂.

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Answer: 285.63g of MgCl2.

Explanation:

Very easy stiochemistry question. Use the dimensional analysis. For example 1 m x 100 cm / 1m and meters get canceled out and 1 m is 100 cm.

For the question, start with the given things. You know that it was started with 72.8 grams of magnesium. Convert it to molar mass (to use moles for comparison), and then find the mass of mg.

The atomic mass of Aluminum is 23, which means it has a total of 23 particles in its nucleus, including protons and neutrons.

Aluminum has an atomic number of 13, which means it has 13 protons in its nucleus.

To find the number of neutrons, we subtract the atomic number from the atomic mass. So, Aluminum has 23 - 13 = 10 neutrons in its nucleus. Electrons are the negatively charged particles that orbit around the nucleus of an atom.

Aluminum, being a neutral atom, has an equal number of electrons to the number of protons in its nucleus, which is 13. These electrons are distributed in different energy levels or shells around the nucleus.

Aluminum is a widely used metal in different applications due to its unique properties such as low density, high strength, and resistance to corrosion. It is used in the manufacturing of cans, foils, and aircraft parts. The number of protons and electrons determines the atomic number and chemical properties of an element. The number of neutrons affects the stability and isotopes of an element.

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Answer:

0.631 grams is the theoretical yield of solid copper (Cu) that can be recovered at the end of the experiment

Explanation:

The concentration of the solution is given by :

\([C]=\frac{\text{Moles of compound}}{\text{Volume of solution in Liters}}\)

We have:

Concentration of copper (II) nitrate solution = \([Cu(NO_3)_2]=2.41 M\)

The volume of solution = 4.12 mL

1 mL= 0.001 L

\(4.12 mL= 4.12\times 0.001 L= 0.00412 L\)

Moles of copper (II) nitrate in solution = n

\(2.41=\frac{n}{0.00412 L}=0.0099292 mol\)

Moles of copper (II) nitrate in solution = 0.0099292 mol

1 Mole of copper(II) nitrate has 1 mole of copper then 0.0099292 moles of copper(II) nitrate will have :

\(1\times 0.0099292 mol= 0.0099292 \text{ mol of Cu}\)

Mass of 0.0099292 moles of copper:

\(=0.0099292 mol\times 63.55 g/mol=0.63100 g\approx 0.631 g\)

This mass of copper present in the solution is the theoretical mass of copper present in the given copper(II) nitrate solution.

0.631 grams is the theoretical yield of solid copper (Cu) that can be recovered at the end of the experiment

The volume of water is 17 L

The volume of CO2 is 12 L

Stoichiometry is the calculation of the quantities of reactants and products in a chemical reaction. It involves balancing the chemical equation, determining the moles of reactants and products, and using mole ratios to find the desired quantities.

We have that;

Number of moles of oxygen = 62.3 g/32 g/mol

= 1.9 moles

If 5 moles of oxygen produces 44.8 L of water

1.9 moles of oxygen will produce 1.9 * 44.8/5

= 17 L

Number of moles of CO = 15 g/28 g/mol

= 0.54 moles

Volume of the CO2 = 0.54 moles * 22.4 L

= 12 L

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The pressure of 1.27 L of a gas at 288°C, if the gas had a volume of 875 ml at 145 kPa and 176°C is 1.195 atm.

Ideal gas equation of any gas will be represented as:
PV = nRT, where

P = pressure

V = volume

n = moles

R = universal gas constant

T = temperature

First we calculate the moles of gas, when the volume of gas 875 ml at

145 kPa and 176°C as:

n = (1.431atm)(0.875L) / (0.082L.atm/K.mol)(449.15K)

n = 1.252 / 36.83 = 0.033 moles

Now we measure the pressure of 0.033 moles of gas of 1.27 L of a gas at 288°C as:

P = (0.033mol)(0.082L.atm/K.mol)(561K) / (1.27L) = 1.195 atm

Hence required pressure of gas is 1.195 atm.

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Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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Answer:

true

Explanation:

The digestive tract is made up of organs that food and liquids travel through when they are swallowed, digested, absorbed, and leave the body as feces. These include the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus.

Since Na2SO4 + 2CuSO4 = 2NaSO4 + Cu2SO4 has an equal number of each element in its reactants and products, the equation is balanced.

A chemical equation that is balanced has the same number of each type of atom on both sides of the equation. Subscripts are a component of the chemical formulas for the reactants and products that show how many atoms of the previous element there are in each.

Count the atoms on each side first. Next, alter one of the compounds' coefficients. Finally, count the atoms once more, and then repeat steps two and three until the equation is balanced.

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HCN, Na2SO4: Combination of compounds.

Mg3N2: Chemical compound.

CO2, H2O: Dissolution or hydration reaction.

Cu, Zn(NO3)2: Single-replacement reaction.

Na, N2: Combination of elements.

Let's analyze each chemical combination to determine the type of reaction involved:

HCN, Na2SO4:

The combination of hydrogen cyanide (HCN) and sodium sulfate (Na2SO4) does not represent a specific chemical reaction. It is simply the combination of two compounds.

Mg3N2:

Mg3N2 represents a chemical compound, magnesium nitride. It does not indicate a specific reaction.

CO2, H2O:

The combination of carbon dioxide (CO2) and water (H2O) represents a chemical reaction known as hydration or dissolution. When carbon dioxide dissolves in water, it forms carbonic acid (H2CO3), which can further dissociate into hydrogen ions (H+) and bicarbonate ions (HCO3-).

Cu, Zn(NO3)2:

The combination of copper (Cu) and zinc nitrate (Zn(NO3)2) represents a single-replacement reaction. Copper displaces zinc from the compound, resulting in the formation of copper nitrate (Cu(NO3)2) and zinc metal (Zn).

Na, N2:

The combination of sodium (Na) and nitrogen gas (N2) does not represent a specific reaction. It is simply the combination of two elements.

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