Determine the total kilojoules in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 11 g of fat, and 9 g of protein.

Answer:

B. 4 ham slices

Explanation:

A chemical reaction involves one or more substances known as reactants combining chemically to give one or more substances known as products.

Reactants in chemical reactions combine in definite mole or mass ratios to give products. Therefore, when one substance is present in excess of what is required to combine with another to form products, that substance is known as the excess reagent. The other substance which is present in a smaller amount and which when used up, the reaction stops is known as the limiting reagent.

From the illustration of the sandwiches in the question, the recipe for one sandwich represents the chemical equation of a reaction. The equation form is given below:

2 cheese slices + 1 ham slice + 2 bread slices ---> 1 sandwich

The ratio of the reactant is 2 : 1 : 2

From the available ingredients, 12 cheese slices, 10 ham slices, 12 bread slices.

12 cheese slices will require 6 ham slices and 12 bread slices to produce 6 sandwiches.

However, since there are 10 ham slices, 4 ham slices will be left over unused. This is the excess or leftover reactant.

Answer:

B. 4 ham slices

Explanation:

Got it right on the test

Answer:

0.43 atm

Explanation:

From the question given above, the following data were obtained:

Initial pressure (P₁) = 0.95 atm

Initial volume (V₁) = 0.55 L

Final volume (V₂) = 1.22 L

Final pressure (P₂) =?

The final pressure of the gas can be obtained by using the Boyle's law equation as follow:

P₁V₁ = P₂V₂

0.95 × 0.55 = P₂ × 1.22

0.5225 = P₂ × 1.22

Divide both side by 1.22

P₂ = 0.5225 / 1.22

P₂ = 0.43 atm

Therefore, the final pressure of the gas is 0.43 atm

The final pressure of the gas is 0.43 atm.

Pressure is the process of force exerted perpendicular to any surface.

Given, the Initial pressure (P₁) is 0.95 atm

The initial volume (V₁) is 0.55 L

The final volume (V₂) is 1.22 L

To find the final pressure (P₂)

By the Boyle's Law

\(\rm P_1V_2= P_2V_2\)

\(\rm 0.95\times 0.55 = P_2\times1.22\\\\0.5225 = P_2 \times 1.22\\\\Divided\;both \;side\;by\;1.22\\\\P_2=\dfrac{0.5225}{1.22} = 0.43 atm.\)

Thus, the final pressure of the gas is 0.43 atm.

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There are five orbitals with l = 2 and n = 3. This is because when l = 2, the subshell is known as the d-subshell, which can hold up to five orbitals.

Orbitals are regions of space where electrons of an atom are most likely to be found. They are three-dimensional regions around an atom's nucleus that are described by quantum numbers. Orbitals are organized into shells, or energy levels, which are determined by the principal quantum number. Electrons occupy orbitals according to the Pauli exclusion principle and the Hund's rule. Each orbital can hold up to two electrons, and the number of orbitals in a shell is equal to the number of electrons in that shell.

The orbitals are designated as 3d, 3dxy, 3dyz, 3dxz and 3dz2.

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Answer:

Mass = 365.45 g

Explanation:

Given data:

Mass of HNO₃ = ?

Number of moles of HNO₃ = 5.8 mol

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of HNO₃ is 63.01 g/mol

By putting values in the formula,

Mass = 5.8 mol × 63.01 g/mol

Mass = 365.45 g

5.8 moles of HNO₃ have 365.45 gram mass.

Answer:

Molar mass of 365.516

Explanation:

To calculate the mass of 5.8 moles of nitric acid or HNO3, is by adding Hydrogen 1.01, Nitrogen 14.01, and Oxygen 16.00,

together and multiplying that by 3. 

1.01+14.01+16.00(3)= 63.02 Grams per mole 

We multiply 63.02 × 5.8 moles, and we get the mass of 365.516

The final temperature : T₂=209.86 K = -63.1 °C

Given

V₁=568 cm³

T₁=25° C+ 273 = 298 K

V₂=400 cm³

Required

Final temperature(T2)

Solution

Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

\(\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\)

T₂=(V₂.T₁)/V₁

T₂=(400.298)/568

T₂=209.86 K = -63.1 °C

Answer:

so so

Explanation:

this your question?? <_>

By solving the equation we get:NaHCO3 has a molecular mass   84 g/mol.

Na2CO3 has a molecular weight of 0.02 mol.

Mass of Na2CO3 = **2.12 g**

Daltons or atomic mass (Da or u) are used to measure molecular mass, which is the mass of a certain molecule1. The molecular mass indicates a molecule's mass in relation to the 12 C atom, whose mass is assumed to be 12. The molar mass, which is stated in g/mol1, is the mass of a particular material divided by the amount of that substance. Hence, the molecular mass is the mass of a single particle or molecule, whereas the molar mass is the average of numerous particles or molecules

The equation below illustrates how heating causes sodium hydrogencarbonate to break down:

Na2CO3(s) + H2O(g) + CO2 = 2 NaHCO3(s) (g)

a) I The formula: can be used to determine how many moles of sodium hydrogencarbonate were utilised.

Molar mass = mass times the number of moles

NaHCO3 has a molecular mass of (23 + 1 + 12 + 48) g/mol, or 84 g/mol.

3.36 g of NaHCO3 divided by 84 grammes per mole yields 0.04 moles.

ii) Stoichiometry can be used to calculate the quantity of sodium carbonate produced:

We can deduce from the balanced equation that 2 moles of NaHCO3 result in 1 mole of Na2CO3.

Na2CO3 has a molecular weight of (0.04 mol 2 mol) 1 mol = 0.02 mol.

iii) The formula Mass = Number of moles Molar mass can be used to determine the mass of sodium carbonate produced.

molar volume of Na2CO3 = (23 × 2 + 12 + 48) g/mol = 106 g/mol

Mass of Na2CO3 = 0.02 mol × 106 g/mol = **2.12 g**

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Change in temperature when quicklime reacts with water.

When ice cubes are separated from the freezer and conducted to room temperature, they turn into a liquid. This temperature is the boiling point of water. Heat makes water molecules move fast. Cooling air causes water vapor to change to a liquid. Water changes rapidly into a gas when water is heated to a temperature of 100 degrees Celsius or 212 degrees Fahrenheit.

When energy is free in an exothermic reaction, the temperature of the reaction mixture increases. When energy is soal up in an endothermic reaction, the temperature decreases.

So we can conclude that Some chemical reactions are distinguished by changes in temperature.

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Answer:

it went under the process known as crystalization

Explanation:

am a chemist

121.523 nm  is the wavelength (in nm) of the photon absorbed for a transition of an electron.

\(n_1=1 ,n_2=2\)

\(1/\lambda=1.09737 *10^7*1/1^2 *1/2^2=8230275m^-1\)

\(\lambda=1/8230275\)

1.215x10^-7 m=121.523 nm

since the dating between wave frequency and wavelength is inverse, gamma rays have extraordinarily tiny wavelengths that are best a small portion of the size of atoms, whereas different wavelengths can extend as a long way as the universe. No of the medium they are passing via, electromagnetic radiation's wavelengths are commonly expressed in phrases of the vacuum wavelength, but this isn't always said explicitly.

The wavelength of electromagnetic radiation influences how it behaves. speed of mild = wavelength x frequency power = Planck's consistent x frequency Wave wide variety = 1/wavelength in cm. The wavelengths of different elements of the electromagnetic spectrum are displayed collectively with a difficult approximation of the wavelength size.

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From the calculation, there are 1.5 g of water produced in the reaction.

An equation shows the chemical transformation that takes place in a reaction vessel. In this case, the equation is; C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O.

Now;

Number of moles of glucose = 2.5g/180 g/mol = 0.014 moles

Since 1 mole of glucose produces 6 moles of water

0.014 moles of glucose produces 0.014 moles * 6 moles/ 1 mole

= 0.084 moles

Mass of water produced = 0.084 moles * 18 g/mol = 1.5 g of water

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To convert acetone (propanone) to propanal, you can use a two-step process involving reduction and oxidation reactions. Here's a general outline of the process:

1. Reduction of Acetone to Isopropanol:

First, you need to reduce acetone to isopropanol (2-propanol) using a reducing agent. Common reducing agents for this step include sodium borohydride (NaBH₄) or lithium aluminum hydride (LiAlH₄).

Reaction conditions:

- Acetone + NaBH₄ (or LiAlH₄) → Isopropanol

- Solvent: usually an alcohol (e.g., methanol or ethanol) or an ether (e.g., THF)

- Temperature: room temperature or slightly above

2. Oxidation of Isopropanol to Propanal:

Next, oxidize isopropanol to propanal using an appropriate oxidizing agent. A common oxidizing agent for this step is pyridinium chlorochromate (PCC), which selectively oxidizes primary alcohols to aldehydes without over-oxidizing to carboxylic acids.

Reaction conditions:

- Isopropanol + PCC → Propanal

- Solvent: an aprotic polar solvent (e.g., dichloromethane)

- Temperature: room temperature

- Avoid strong oxidizing agents like potassium permanganate (KMnO₄) or chromium trioxide (CrO₃) because they can over-oxidize the isopropanol to propionic acid.

Answer:

Water sweated by water from the leaf cells evaporating into the air, which pulls water and nutrients from the leaf into the air.

Answer:i think its right because i had this one before

2u+3u+8u=0

Answer:

log = ( - 0.51 z 2) / ( 1 + ( / 305)

Explanation:

Answer:

I think tube like ... is it right

Answer:

The actual answer is flowers have heart like structures that transport nutrients and water with in the plants.

The answer to this question is that blood flow to the skin does not increase; instead, it is directed inward to conserve heat.

The preoptic area of the hypothalamus serves as the body's thermostat, and when its temperature drops below the thermostat setting, a number of physiological processes are triggered. A) Shivering thermogenesis occurs, which is the production of heat by muscular contractions, B) Nonshivering thermogenesis occurs, which is the production of heat by increased metabolic activity in brown adipose tissue, C) Epinephrine levels rise to promote the mobilization of glucose from stored energy sources and D) Blood returning from the limbs is shunted to deep veins to conserve heat. However, the answer to this question is that blood flow to the skin does not increase; instead, it is directed inward to conserve heat.

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Answer: true

Explanation: An atom does of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. Protons and neutrons have nearly equal masses, but in a way they DO differ in charge.

Answer:

Sr{2+}(aq) + S{2-}(aq) → SrS(s)

Answer:

d.7 is the correct answer

The centrifuge is an instrument which is mainly used in research and clinical laboratories. All the given equipment are used in laboratories. But Centrifuge is not a common piece of lab equipment. The correct option is B.

The laboratory equipment is mainly used to perform experiments and to take measurements and to collect data. The most common laboratory equipment includes Bunsen burners, burettes, pipette, microscope, calorimeters, etc.

A centrifuge is a system which is used to separate the components of a liquid using centrifugal force. It is not a common laboratory equipment.

Thus the correct option is B.

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Answer:

water vapour I guess I the answer of your question

A chemical reaction of exothermic kind releases energy in the form of heat and light.

We are given that reactant releases 27.4kJ/g for every gram of reactant consumed.

We are required to find number of grams of reactant that has been consumed

It is also given that 880J of energy is released

Hence, grams of reactants consumed is 880/27.4gm

Disclaimer:

It has been asked by the student to leave the question as mathematical expression.

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