Do you know this Ca(NO2)2 ? It's not calcium nitrate

Answer:

these micronutrients are not produced in our bodies and must be derived from the food we eat.

Explanation:

Vitamins and minerals are micronutrients required by the body to carry out a range of normal functions. However, these micronutrients are not produced in our bodies and must be derived from the food we eat. Vitamins are organic substances that are generally classified as either fat soluble or water soluble.

Answer:

One calorie is equivalent to 4.18joules

Answer:

they both revolve or rotate around something

Explanation:

The earth revolves around the sun and the moon rotates around the earth.

0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

In order to calculate the number of moles of O2 needed to produce 14.2 grams of P4O10 from P, we need to use the equation for the reaction:

P + 5O2 → P4O10

We can calculate the number of moles of O2 needed by using the molar mass of P4O10, which is 284 g/mol. First, we need to calculate the number of moles of P4O10 present in 14.2 grams:

14.2 g/ 284 g/mol

= 0.05 mol.

Now, we can use the mole ratio between P and O2 to calculate the number of moles of O2 needed. The mole ratio is 5:1, meaning that for every 5 moles of O2, 1 mole of P is needed. Therefore, to get 0.05 moles of P4O10 from P, we need 0.05 x 5 = 0.25 moles of O2.

In conclusion, 0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

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Answer:

there are 6

Explanation:

The decimal 0 doesn't count as an SF because there is no point for it.

Answer:

Anticline

Other than that Just A C:

Explanation:

Answer:

A

Explanation:

The molarity of sugar in this beverage : 0.51 M

Explanation:

Given

mass of soda=solute=33 g

volume of bottle=solution=355 ml

Required

the molarity of sugar

Analysis

\(\tt M=\dfrac{n}{V}\)

Solution

\(\tt mol=\dfrac{33}{180.16 g/mol g/mol}=0.1832\)

\(\tt M=\dfrac{0.1832}{0.355}=0.51~M\)

Answer:

When looking at the radiation emitted by distant stars or galaxies, scientists see emission spectra 'shifted' towards the red end of the electromagnetic spectrum—the observed wavelengths are longer than expected. ... Something causes the wavelength of the radiation (emitted by faraway stars and galaxies)

Answer:

1eV

Explanation:

Answer:

1ev

Explanation:

Answer:

The total energy reaction would be -698 kJ/mol.

Explanation:

The formula to calculate the enthalpy change of a reaction is the following:

Let's calculate the bond energy for each reactant:

- CH4: As we have 4 bonds of H - C, the bond energy is 4 x 412 kJ/mol = 1648 kJ/mol.

- O2: As we have 1 bond of O = O, but we have 2 moles of O2, we just multiply the bond energy of O = O by two: 2 x 496 kJ/mol = 992 kJ/mol.

Now, let's calculate the bond energy for each product:

- CO2: As we have 2 bonds of C - O (O - C - O), the bond energy would be 2 x 743 kJ/mol = 1486 kJ/mol.

- H2O: As we have 2 bonds of O - H (O - H - O), and 2 moles of H2O, we multiply the bond energy by the number of bonds, and the number of moles: 2 x 2 x 463 kJ/mol = 1852 kJ/mol.

Finally, we just apply the given formula, like this:

The total energy reaction would be -698 kJ/mol.

The statement that is true about the molarity of the solution is that 5.0 moles of a solute is dissolved in 1.0L of solution (option D).

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

The molarity or concentration of a solution is a function of the number of moles of solute it contains and the volume of the solvent it is dissolved in.

This suggests that if a solution has a concentration of 5.0M, it has a solute of 5.0moles dissolved in 1.0L of solvent.

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Answer:  

The best explanation for both the first and second claims is that aluminum is a pure substance: Aluminum is one form of atom and its structure is always the same.  Aluminum has an evenly blended composition.

Explanation:

Aluminum is one type of atom and its composition is always the same, this statement also gives the property of a pure substance . In fact, pure substances are often homogeneous and contain only one form of atom or molecule.

One of a pure substance's key characteristics is that it has a uniform composition that is homologous in nature, and can be mixed uniformly throughout. ALUMINUM's second statement notes the property of a pure substance. Aluminum is also homologous in terms of occurrence.

The atoms are very small and have a diameter of around 1 x 10-10 meters. It's difficult to view them using a light microscope due to their limited size. Although it may not be possible to view an atom using a light microscope, a number of techniques have been developed, such as electron microscopy, to observe and research the structure of atoms. Therefore, the statement that the aluminum atom can not be seen through a microscope does not explain the pure content of aluminum.

This argument - 'Aluminum contains substances which are not bound together' does not explain the fact that it is a pure material as it notes that the property of a pure material does not exist in relation to its chemical bonds.

.Therefore, the first and second aluminum statements give the best description of a pure material.

Answer:

A nuclear reaction releases more energy per gram and appears to violate the law of conservation of mass.

Explanation:

Answer:

A

Explanation:

Edge 2021

Answer: If I have 17 moles of gas at a temperature of 67°C, and a pressure of 5.34 atmospheres, what is the volume of the gas? write down all the givens of the problem

Answer:

PV = nRT

5.34*V = 17*25/3*340

So, V = 17*25*340/3*5.34

Explanation:

Answer:

True

Explanation:

Document and photograph the evidence. Properly secure the evidence by placing it in a paper bag or envelope. Close, seal, or tape the paper bag or envelope. The examiner must initial, date, and time across the sealed area. Label the bag or envelope with the patient's identifying information.

Also, I took the quiz :)

First, we'll look at the ideal gas equation,

PV = nRT

The temperature and pressure are said to be constant; Additionally, R is a constant already. Along these lines, we get:

V = constant * n

The direct proportional equation is as follows: As a result, we get:

V/n = constant

V₁/n₁ = V₂/n₂

Replace V₂ with the qualities and address.

V₂ = (4 * 1.48) / 0.864

V₂ = 6.85

In the end, 6.85 Liters of gas must be present, so we must add:

6.85 - 4 = 2.85 liters

The volume of a gas is directly proportional to its mole volume at a fixed temperature and pressure.

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Q- At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure if you need a total of 1.48mol of oxygen gas in the vessel?

The electron domain and molecular geometries at the nitrogen and carbon atoms of urea can be predicted by applying the VSEPR theory.

In urea, the nitrogen atom has two bonded electron domains (one from the double bond with carbon and one from the lone pair of electrons) and the carbon atom has three bonded electron domains (one from the double bond with nitrogen and two from the two single bonds with oxygen).

Based on the VSEPR theory, the electron domains around the nitrogen atom will be arranged in a tetrahedral shape. However, since one of the domains is a lone pair, the molecular geometry around the nitrogen atom will be bent or angular.

On the other hand, the electron domains around the carbon atom will be arranged in a trigonal planar shape. Therefore, the molecular geometry around the carbon atom will also be trigonal planar.

To summarize, the electron domain geometry around nitrogen in urea is tetrahedral and the molecular geometry is bent or angular. The electron domain geometry around carbon is trigonal planar and the molecular geometry is also trigonal planar.

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46.03 grams of iron and 19.75 grams of oxygen gas reacted to form 65.6 grams of Fe2O3.

What is Moles?

In chemistry, a mole is a unit of measurement that represents a certain amount of a substance. One mole of any substance is equal to 6.022* \(10^{23}\) particles (atoms, ions, etc.), which is known as Avogadro's number. The number of moles of a substance is determined by dividing the mass of the substance by its molar mass, which is the mass of one mole of the substance.

The balanced chemical equation is:

4Fe + 3O2 → 2Fe2O3

From the equation, we can see that 4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3.

To find out how many grams of Fe and O2 reacted to form 65.6 grams of Fe2O3, we first need to calculate the number of moles of Fe2O3 produced:

molar mass of Fe2O3 = 2 x atomic mass of Fe + 3 x atomic mass of O = 2 x 55.845 + 3 x 15.999 = 159.685 g/mol

moles of Fe2O3 = mass of Fe2O3 / molar mass of Fe2O3

moles of Fe2O3 = 65.6 g / 159.685 g/mol

moles of Fe2O3 = 0.411 mol

From the balanced chemical equation, we know that 2 moles of Fe2O3 are produced from 4 moles of Fe and 3 moles of O2. Therefore, the number of moles of Fe and O2 that reacted can be calculated as follows:

moles of Fe = (4/2) x moles of Fe2O3

moles of Fe = 2 x 0.411 mol

moles of Fe = 0.822 mol

moles of O2 = (3/2) x moles of Fe2O3

moles of O2 = 1.5 x 0.411 mol

moles of O2 = 0.617 mol

Finally, we can calculate the mass of Fe and O2 that reacted:

mass of Fe = moles of Fe x atomic mass of Fe

mass of Fe = 0.822 mol x 55.845 g/mol

mass of Fe = 46.03 g

mass of O2 = moles of O2 x molar mass of O2

mass of O2 = 0.617 mol x 32.00 g/mol

mass of O2 = 19.75 g

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Answer:

water, a substance composed of the chemical elements hydrogen and oxygen.

Answer:

Repetition

Explanation:

In the world of science, experiments are regularly conducted to test out hypotheses. These experiments are however, not conducted by scientist once to derive a result. They are rather conducted multiple times (repeated) to ascertain the accuracy i.e not as a result of random occurrence. The experiments that undergo multiple trials are said to undergo REPETITION.

This is the case of the scientist in this question, who is conducting an experiment to test what temperature causes the fastest growth rate in sunflower plants. He conducted the experiment multiple times, making it an example of REPETITION.

N.B: Replication is when the experiment is re-conducted by another scientist to see if same result is derived.

Answer:

as examples of substances in the macroscopic scale, we can give names of any substance that we see from a single strand of hair to a large vehicle

As examples of substances on a microscopic scale, we can give microorganisms such as bacteria, fungi, viruses, etc.

Aerobes are organisms that require oxygen to grow and survive. The correct answer is: aerobes.

They have metabolic pathways that depend on the presence of oxygen for efficient energy production through aerobic respiration. Without oxygen, aerobes cannot carry out their metabolic processes effectively.

Facultative anaerobes, on the other hand, can grow and survive in the presence or absence of oxygen. They have the ability to switch between aerobic and anaerobic metabolic pathways depending on the availability of oxygen. In the presence of oxygen, facultative anaerobes can utilize aerobic respiration, and in the absence of oxygen, they can switch to anaerobic fermentation.

Anaerobes are organisms that do not require oxygen for growth and can even be inhibited or killed by its presence. They have metabolic pathways that allow them to carry out fermentation or other anaerobic processes for energy production.

Therefore, the correct answer is aerobes, as they specifically require oxygen to grow.

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Answer:

Element A and element D

Please make me brainliest!!

Answer:

The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings.

Explanation:

In an endothermic reaction,the energy found in the reactants remains in the system, and the reactants also take energy from the surroundings. The enthalpy change of an endothermic reaction is positive.

The reaction in which  heat energy is absorbed by the reactants is called an endothermic reaction. The enthalpy change in an endothermic reaction is positive.

The reaction in which heat is evolved from the system to the  surroundings is called an exothermic reaction in which the enthalpy change is negative.

By absorbing heat energy, reactants becomes energetic enough to overcome the barrier potential of the reaction. Therefore, the potential energy diagram of an endothermic reaction will show less energy for reactants than that of products.

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Answer: is A Radiation is a type of heat transfer that transfer heat by electromagnetic waves. Outside the visual color range, we cannot see it. But sure almost everything is emitting and absorbing radiation right now. This type of heat transfer works in almost every environment, including vacuum.

Explanation: I hoped that helped.

In order  for  electromagnetic radiation to transfer heat the objects must be in in direct physical contact.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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The equilibrium vapor pressure with respect to water (eow) is 259.9 Pa. assume that saturation vapor pressure is same as equilibrium vapor pressure.

Therefore, the RH at the frost point is  

RH = (eow / saturation vapor pressure) × 100

= (259.9 Pa / 259.9 Pa) × 100

= 100%

b) At T = -11 °C, we need to compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi) to determine if ice particles will form. From the given table, at T = -11 °C, the equilibrium vapor pressure with respect to water (eow) is 237.7 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 165.3 Pa.

The air is supersaturated with respect to ice, and the presence of Kaolinite particles can provide surfaces for water droplets to condense onto, leading to the formation of ice particles.

c) At T = -12 °C, we compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi). From the given table, at T = -12 °C, the equilibrium vapor pressure with respect to water (eow) is 217.3 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 181.2 Pa.

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Answer:

added to what? base? if its added to base then it will increase in pH. H2S04(sulphuric acid is strong) so the pH is ard 3

Answer: Nuclear fusion is a nuclear reaction where atomic nuclei of a low atomic number fuse to form a heavier nucleus releasing energy.

Explanation: