Which substance are needed for cellular respiration 

The prefix "deci" is used to express one tenth of the unit of any measurement. For example decimeter is the one tenth of the one meter length.

Metric system is a n international system of units. Under the direction of an international standards body, the historical evolution of these systems culminated in the definition of the International System of Units (SI) in the middle of the 20th century. Metrication is the process of converting to the metric system.

There are many prefix that indicates the exact measurement of a variable under different situations. There are prefix like, centi, deci, micro, milli etc. The prefix deci is used to express one tenth (1/10) of the unit.

One decimeter is one tenth of 1 m. That is 10⁻¹ m. Similarly we can use the prefix deci to other variables such as deciliter, decigram etc. Usually used to express small length in metric system.

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Answer:

One team pulls with more force than the other

nitrogen = N

sodium = Na

chromium = Cr

Answer:

Explanation:

Rutherford's gold foil experiment revealed that most of the alpha particles went right through the gold foil but only a couple got deflected, demonstrating that the atom has mostly empty space with a small, hard, positively charged nucleus. Because of this, Rutherford proposed the nuclear model of the atom.

Answer:

Hope this helps

Explanation:

Rutherford took a thin gold foil and made alpha race particles to pass through it. He saw that most of the particle passed straight through the gold foil . But some deflected in small angles and 1 in 12000 particles deflected/rebounded back.

These observation made Rutherford conclude that-

- Most of the place inside an atom is empty because particles passed straight through.

- some particles deflected in small angles meaning the positive charge in an atom occupies very less space.

Mass of Sample = 59.993 - 57.880 = 2.113 g

Mass of Sample after 1st Heating = 59.710 - 57.880 = 1.83 g

Mass of Water Removed = 2.113 - 1.83 = 0.283 g

Mass of Sample after 2nd Heating = 59.7 - 57.88 = 1.82 g

Mass of Water Removed = 1.83 - 1.82 = 0.01 g

Total Mass of Water lost = 0.293 g

Moles of Water lost = 0.293 / 18 = 0.01628

Mass of Anhydrate = 1.82 g

Now check the molar mass of each hydrate:

CuSO4.5H2O = 159.61 g/mol

ZnSO4.7H2O = 287.58 g/mol

BaCl2.2H2O = 244.26 g/mol

MgSO4.7H2O = 246.47 g/mol

Now, Check the mole ratio of Anhydrous Salt : Water to get the required stoichiometric coefficient of H2O.

For BaCl2.2H2O,

Answer: BaCl2.2H2O

What is anhydrous salt?

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1) Tool used fοr spreadsheets and analysis are Micrοsoft Excel. Thus, option (b) is cοrrect.

2) Tool used tο create presentations are Microsoft PowerPoint. Thus, Option a) is cοrrect.

A spreadsheet is a type of cοmputer software that captures, displays, and manipulates data that is οrganized in rows and columns.

Users can style, organize, and cοmpute data in a spreadsheet using Microsoft Excel.

You can use PowerPoint on your Cοmputer, Laptop, or mobile device to: Create slideshows from inception οr from a template

Microsoft Word is a word editing sοftware that can create basic and complicated documents.

3) Tool used for authoring dοcuments are Microsoft Word. Thus, Option a) is cοrrect.

4) the best apprοach would be Research the problem and give a presentation on how yοu approached the problem, and provide the different books as examples on various slides of the presentation. Thus, Option a) is cοrrect.

5) The best wοuld be A spreadsheet with all your calls and the toughest ones highlighted using fill cοlor. Thus, Option c) is cοrrect.

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Answer:

P4O10

Explanation:

Answer:

Explanation:

% yield = (actual yield / theoretical yield) x 100%

actual yield = 21.47 g

theoretical yield = 65.45 g

% yield = (21.47 g / 65.45 g) x 100%

% yield = 32.80%

Therefore, the student obtained a percent yield of 32.80%.

Answer: The answer to this question is negative 40 degrees Fahrenheit

Explanation:

The ionization constant (Ka) for a 0.10 M solution of ethanoic acid with a pH of 2.88 is [tex]5.82 * 10^(^-^5^)[/tex]

The ratio of reactant to product amounts that is used to predict chemical behaviour is the definition of the equilibrium constant for a chemical process.

Ka = [H+][A-] / [HA]

where [H+] is the concentration of hydrogen ions, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

For ethanoic acid (also known as acetic acid), the ionization reaction is:

CH3COOH + H2O ⇌ CH3COO- + H3O+

pH = -log[H3O+]

The Ka expression can now be written as:

[tex]Ka = (x)^2 / (0.10 - x)[/tex]

At equilibrium, the value of x is very small compared to 0.10 M, so we can make the approximation that 0.10 - x ≈ 0.10.

Therefore, we can simplify the Ka expression to:

[tex]Ka = x^2 / 0.10[/tex]

To solve for x, we can use the equilibrium concentration of [H3O+] we calculated earlier:

[tex]x = [H3O+] = 7.68 * 10^(^-^3^) M[/tex]

Substituting this value into the simplified Ka expression, we get:

[tex]Ka = (7.68 * 10^(^-^3^))^2 / 0.10 = 5.82 * 10^(^-^5^)[/tex]

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Answer:

Explanation:

1. 546.0ml x [tex]\frac{L}{1000mL}[/tex]= 0.5460L

2. 86.0kg x [tex]\frac{1000g}{1 kg}[/tex]= 8.60x[tex]10^{4[/tex] g

3. 2.56 pound x [tex]\frac{16 ounces}{1 pound}[/tex]= 40.1 ounces

4. 75.3 pound x [tex]\frac{453.6 g}{1 pound}[/tex] = 45200 g

5. 12.5 yard x [tex]\frac{91.44 cm}{1 yard}[/tex] = 1140 cm

Sodium (Na) has 11 electrons and is located in Group 1 of the periodic table.

E. 2.8.6 - Sodium will lose one electron from its outermost shell, which has 6 electrons, to achieve the stable electron configuration of the previous noble gas, neon (2.8). This will result in the formation of a sodium ion with a +1 charge, written as Na+.

F. 2.8.2 - Sodium will lose two electrons from its outermost shell, which has 2 electrons, to achieve the stable electron configuration of the previous noble gas, neon (2.8). This will result in the formation of a sodium ion with a +2 charge, written as Na2+.

It's important to note that the formation of Na2+ is highly unlikely under normal conditions, as the ionization energy required to remove a second electron from a sodium atom is much higher than the energy required to remove the first electron.

Answer:

A.Temperature

Explanation:

1) The pressure is 26.4 torr

2) The time is 24.4 s

A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. In other words, it is the opposite of a synthesis reaction, where two or more substances combine to form a more complex substance.

We know that;

[tex]lnPt =lnPo - kt\\lnPt = ln(450) - ( 4.5 x 10^-2 * 63)\\Pt = eln(450) - ( 4.5 x 10^-2 * 63)\\Pt = 26.4 torrln[1/3(450)] = ln 450 - (4.5 x 10^-2t)\\5 = 6.1 - 0.045t\\5 - 6.1 = - 0.045t\\t = 24.4 s[/tex]

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Answer:

c) MALDI coupled with time of flight (TOF) MS would be the best technique to analyze a polymer that is not very soluble in most solvents with mass spectroscopy and get an estimate of its molecular weight. This technique is particularly suited for the analysis of large molecules such as polymers and biopolymers. MALDI (matrix-assisted laser desorption/ionization) is a soft ionization technique that uses a laser to desorb and ionize molecules from a solid matrix. The resulting ions are then accelerated in a time-of-flight (TOF) mass analyzer, which separates them according to their mass-to-charge ratio (m/z). The mass spectrum obtained from this technique provides information on the molecular weight of the polymer.

Explanation:

In 15.7 grams pf zinc oxide, there are roughly 1.144 x 1023 molecules. In order to treat or prevent skin irritation from things like wounds, burns, and diaper rash, zinc oxide is a medicinal cream, ointment, or paste.

Diaper rash is treated and prevented using topical zinc oxide lotion. As a result of diaper use, it is also utilized to shield skin from irritation and moisture.

* "Metal fume fever" can be brought on by exposure to zinc oxide. This flu-like condition causes symptoms like a metallic taste in people's mouths, headache, fever, chills, pains, tightness in the chest, and cough. After exposure, the symptoms may not appear for some hours, and they often manifest one or two days later.

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Answer:

Explanation:

D. Ionizing radiation refers to any type of electromagnetic radiation or particle radiation that has enough energy to remove tightly bound electrons from atoms, resulting in the formation of ions. This includes radiation with wavelengths shorter than ultraviolet light, such as X-rays and gamma rays, as well as high-energy particles such as alpha particles, beta particles, and neutrons. Ionizing radiation can cause damage to cells and DNA, leading to health effects such as radiation sickness and an increased risk of cancer.

The root mean square velocity of nitrogen molecules at 25°c is 515 m/s.

The square root of the mean square, or the arithmetic mean of the squares of a particular collection of numbers, is referred to as the root mean square (RMS or rms).

Root Mean Square, or RMS The d.c. current/voltage that dissipates the same quantity of power as the average power wasted by the alternating current/voltage is represented by the current/voltage of the alternating current/voltage.

One kind of mean is the root mean square. Since the squaring turns all of the numbers into non-negative numbers, it is helpful when attempting to determine the average "size" of numbers where the sign is irrelevant. Calculating a collection of integers' standard deviation using the root mean square is the most typical application.

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To calculate the moles of hydrogen gas produced by the reaction, we need to use the ideal gas law equation:

PV = nRT

Where:

P = Total pressure (barometric pressure - vapor pressure of water)

V = Volume of hydrogen gas collected

n = Number of moles of hydrogen gas

R = Universal gas constant (0.08206 L·atm/mol·K)

T = Temperature in Kelvin (23°C + 273.15)

First, let's calculate the total pressure:

Total pressure = Barometric pressure - Vapor pressure of water

Total pressure = 738 mmHg - 21.0 mmHg

Total pressure = 717.0 mmHg

Now, we can plug in the values into the ideal gas law equation:

n = PV/RT

n = (717.0 mmHg)(94.27 mL)/(0.08206 L·atm/mol·K)(23.0°C + 273.15)

n = 0.00345 mol

Therefore, the moles of hydrogen gas produced by the reaction is 0.00345 mol.

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Answer:

The purpose of the lab is to study thermal energy transfer and its effects on different materials. The topic is important because understanding thermal energy transfer is essential to many fields, including engineering, physics, and chemistry. The question you are trying to answer may be something like "How does thermal energy transfer affect the temperature of different materials?"

Your hypothesis may be something like "Materials with high thermal conductivity will transfer heat more efficiently than materials with low thermal conductivity."

To test this hypothesis, you may use a setup where you have a heat source, a temperature sensor, and various materials with different thermal conductivities. You would measure the temperature changes of the materials as they are heated and cooled.

The key results of your lab may include the temperature changes of each material over time, the rate of heat transfer, and any observations about the behavior of the materials during the experiment. To summarize the data, you may create graphs or charts that show the temperature changes of the materials over time.

You may have quantitative data such as temperature readings and calculations of heat transfer rates, as well as qualitative data such as observations of the behavior of the materials during the experiment. You can organize this data in tables, graphs, and written descriptions.

The results may indicate that materials with higher thermal conductivity do transfer heat more efficiently, as your hypothesis predicted.

If you constructed graphs, you may observe trends such as a steeper slope for materials with higher thermal conductivity or a plateau in temperature once a material reaches its maximum heat capacity.

Possible problems with the experiment may include equipment malfunctions or inaccuracies in temperature readings. Surprising results may include unexpected temperature changes or behavior of certain materials.

The results may support your hypothesis and indicate that materials with high thermal conductivity transfer heat more efficiently.

The data supports your claim by showing clear temperature changes and rates of heat transfer for each material.

If you could repeat the experiment, you may try using different materials or adjusting the setup to control for potential confounding factors. For example, you may try using materials with similar heat capacities or reducing heat loss during the experiment.

Explanation:

The density of the solid cylinder is calculated to be as  approximately 17.7 g/cm³.

The mass per unit of volume of a substance is known as density and symbol that is mostly used for density is ρ.

As the formula for the density of an object is:

density = mass / volume

volume = π x radius² x height

volume = π x (3cm)² x 10cm

volume = 282.74 cm³

mass = 5kg x 1000g/kg = 5000g

density = mass / volume

density = 5000g / 282.74 cm³

density ≈ 17.7 g/cm³

Therefore, the density of the solid cylinder is approximately 17.7 g/cm³.

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Answer: The 7 Characteristics of Living Things are

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, and Nutrition

Explanation:

Movement: Change, Position, or place of an organism or part of an organism

Respiration: Break down food in cells and release energy

Sensitivity: Sense Respond, changes in the environment (Stimuli)

Growth: Increase the Size, Mass of an organism By increasing cell number and cell size

Reproduction: Produce offspring to prevent extinction of species

Excretion: Removal Tox Materials, waste products of metabolism, substance in Excess by chemical reactions in cells (respiration)

The theoretical yield of carbonic acid is 12 %.

What is carbon dioxide ?

One part carbon and two parts oxygen make up the gas called carbon dioxide. Its usage by plants to create carbohydrates during a process known as photosynthesis makes it one of the most significant gases on the planet.

What is reaction ?

The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds. The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds.

Therefore, The theoretical yield of carbonic acid is 12 %.

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The cell organelles in the diagram are lysosome and nucleus.

This is referred to as a small structure in a cell that is surrounded by a membrane and has specific types of functions based on their respective properties.

The nucleus is a type of organelle which is involved in the control of the activities of the cells such as controlling of the genetical information of the cell and thus the heredity characteristics of an organism and control of the protein and enzyme synthesis. Another organelle is referred to as the lysosomes which functions as the digestive system of the cell, serving both to degrade material taken up from outside the cell and to digest obsolete components of the cell itself.

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J.J Thomson performed some experiments to demonstrates the structure of atom. He discovered the small negatively charged particles later called the electrons. Hence, option d is correct.

There were various atomic models to describe the structure and electronic properties of atom. J.J. Thomson conducted the cathode ray experiment where, he he hit the cathode ray to and measured the electric charge with electrometer.  

From this, he concluded that the electric charge and the cathode rays was combined and are the same entity. The negatively charged particles in the atoms then called as electrons. Therefore, option d is correct.

Thomson demonstrated the plum- pudding model of atom, where the negatively charged electrons are randomly located inside the atom as the seeds in the plum-pudding. But later modern atomic models replaced this concept.

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Answer:

9 tablets.

Explanation:

2.21gg is 2210mg

2210/250= 8.84

The completed table that fills the formula for the ionic compound has been given below:

To form an ionic compound from the given cation and anion we need to balance the charges of the cation and anions.

For example: Suppose we have a cation C3+ and an anion A-. Thus, to balance the charge we need 1C3+ and 3A-, the formula of the ionic compound formed CA3.

Ion K+ NH4+ Mg2+ Fe3+

Cl- KCl NH4Cl MgCl2 FeCl3

OH- KOH NH4OH Mg(OH)2 Fe(OH)3

CO32- K2CO3 (NH4)2CO3 MgCO3 Fe2CO3

PO43- K3PO4 (NH4)3PO4 Mg3(PO4)2 FePO4

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The empirical formula of the white powder is CH1.5N1O2.

To find the empirical formula of the white powder, we need to determine the ratios of the elements present in the sample. We can assume that the sample contains 100 g of the powder, and then convert the masses of each element to moles using their molar masses:

mass of C = 21.9 mg = 0.0219 g = 0.0018 mol

mass of H = 2.5 mg = 0.0025 g = 0.0025 mol

mass of N = 2.3 mg = 0.0023 g = 0.0017 mol

mass of O = 5.3 mg = 0.0053 g = 0.0033 mol

Next, we can divide each of the mole values by the smallest mole value to get the simplest whole number ratio of the elements:

C: 0.0018 mol / 0.0017 mol = 1.06 ≈ 1

H: 0.0025 mol / 0.0017 mol = 1.47 ≈ 1.5

N: 0.0017 mol / 0.0017 mol = 1

O: 0.0033 mol / 0.0017 mol = 1.94 ≈ 2

Therefore, the empirical formula of the white powder is CH1.5N1O2.

To check if this is consistent with the molecular formula for cocaine (C17H21NO4), we can calculate the molecular formula mass of the empirical formula and compare it to the molecular formula mass of cocaine:

Empirical formula mass = 13.5 g/mol (approximately)

Molecular formula mass of cocaine = 303.4 g/mol

The empirical formula mass is much smaller than the molecular formula mass of cocaine, so the empirical formula is not consistent with the molecular formula.

Therefore, this suggests that cocaine is a larger molecule, made up of many repeating units of CH1.5N1O2. To determine the molecular formula of cocaine, we would need additional information, such as the molecular mass of the compound.

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Answer: D

Explanation: crest to crest to the crust to crust to the west to west.