1. when someone says, "i have a theory that excess salt causes high blood pressure," does that person really have a theory? if it is not a theory, what is it?

Answer:

Very toxic materials are substances that may cause significant harm or even death to an individual if even very small amounts enter the body.There are a number of very toxic materials that may be used in workplaces. Some examples include carbon monoxide, hydrogen sulfide, chlorine and sodium cyanide

Explanation:

here are generally four types of toxic entities; chemical, biological, physical and radiation: Chemical toxicants include inorganic substances such as, lead, mercury, hydrofluoric acid, and chlorine gas, and organic compounds such as methyl alcohol, most medications, and toxins.

The highly toxic chemical compounds can be changed to less toxic one by suitable substitution reactions where, a functional group which less hazardous but having the same biochemical properties are substituted for the new product.

Toxicity of a chemical is its ability to cause serious health risks which can strike a single cell. Exposure to toxic chemicals may even lead to death. The dose of toxicity depends on the structure and reactivity of the chemicals.

Also the adverse effect of each toxic chemicals depends on the way of exposure, and the amount of exposed chemical. There are some methods to detoxify a living body if any toxic is intaken. Suitable antidotes are given for them.

The toxicity generated in a chemical might be originated from a certain structure or group. Thus, by altering  that group for instance substituting a ring or removing them ir substituting a functional group that is responsible for the toxicity will make the chemical  less toxic.

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Answer:

82.24% percent composition of N and 17.76% percent composition of H .

Explanation:

Answer:

9.18 L

Explanation:

When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2Al(s)+6HCl(aq)⟶2AlCl3(aq)+3H2(g) What volume of H2(g) is produced when 7.40 g Al(s) reacts at STP?

first write, then balance the equation

Al + HCl-------------> AlCl3 + H2

2Al + 6HCl-----------> 2AlCl3 + 3H2 2 MOLE  

2 moles of Al produce 3 moles of H2

Al is 7.4/27 =

0.27 moles of Al.

this will produce

0.27 X 3/2 moles of H2 =

0.41 moles of H2

PV =nRT

for STP, P = 1 atm, T = 273.2, R IS 0.082

V= (0.41) X 0.082 X 273,2/1 = 9.18 L

CHECK 1 mole of gas at STP has a volume of 22.4 L

0.41 moles then has a volume of 00.41 X 22.4L = 9.,18 L

Answer: 69.25 AMU

Explanation:

1. find missing %

knowing the first % abundance is 55 you are left with 45%

2. set up an equation

(55% * 67) + (45% * 72) = x

3. solve

(55% * 67) + (45% * 72) =x | break down to solve each part

55% * 67 =36.85 | can be done many ways ex: (55 * 67)/100 or .55 * 67

45% * 72= 32.4| can be done as previously expressed

36.85+32.4=69.25 AMU

That the pressure doubles when the gas's volume is cut in half.

If gas volume and temperature are maintained constant, the formula demonstrates that pressure and volume are inversely proportional.

This implies that if volume decreases, pressure must increase. This implies that if pressure doubles, volume must be half, and if pressure is halved, volume must be doubled in order to maintain the K value.

If the volume is doubled and the pressure is tripled, the effect on the temperature will be 3 2 = 6 times. This is because for perfect gases, the temperature is directly related to both the volume and the pressure.

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The correct option is (C). The approximate final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M is 86 mL (option C).

To find the final volume of the solution, we can use the formula:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Plugging in the values we know, we get:

(8.25 M) (25 mL) = (2.40 M) (V2)

Solving for V2, we get:

V2 = (8.25 M x 25 mL) / 2.40 M
V2 = 86.25 mL

Therefore, the approximate final volume of the solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M is 86 mL (option C).

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Answer:

C. Decrease the pressure of Gas A and increase the temperature of Gas B.

Explanation:

The values for standard temperature and pressure (STP) are zero degrees Celsius and one atmosphere. Since the temperature of gas A is higher than zero degrees, it will have to be reduced. Since the pressure of gas B is less than one atmosphere, it will have to be increased.

This is an example of a Grignard reaction, where a metal (in this case, lithium) reacts with an organic halide (not shown here) to form an organometallic compound, which can then react with other compounds.

The first step of the mechanism involves the deprotonation of methanol by the lithium reagent to form a methoxide anion, which acts as a nucleophile. The methoxide anion then attacks the carbon atom adjacent to the lithium atom, which is electrophilic due to the polarizing effect of the metal atom. This results in the formation of a carbon-carbon bond and the expulsion of the lithium cation.

The second step involves the addition of another equivalent of the organolithium reagent to the resulting alkene, followed by a second deprotonation step to form the final alkane product.

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Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

11.0fy³=11.0ft³/21.0ft³×55°F

The temperature is 28.809°F≈29°F

29°F is the temperature of the helium if the volume of the balloon decreases to 11.0ft³.

Temperature expresses hotness and coldness or a measure of the average kinetic energy of the atoms or molecules in the system.

Assuming pressure is held constant, the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³- 55.0°F

11.0fy³ = 11.0ft³ ÷ 21.0ft³ × 55°F

The temperature is 28.809°F ≈ 29°F

Hence, 29°F is the temperature of the helium if the volume of the balloon decreases to 11.0ft³.

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The order of the mass measurements from smallest to largest is: 10 mg: This is the smallest unit of mass measurement in the given list. It is equal to 0.01 grams or 0.00001 kilograms.

10 g: This is the second smallest unit of mass measurement in the given list. It is equal to 10,000 milligrams or 0.01 kilograms.

10 kg: This is the second largest unit of mass measurement in the given list. It is equal to 10,000 grams or 10,000,000 milligrams.

10 Mg: This is the largest unit of mass measurement in the given list. It is equal to 10,000 kilograms or 10,000,000 grams.

It is important to understand the different units of mass measurement and their conversions, as they are used in many fields, such as science, engineering, and medicine, to measure and calculate the properties of objects and materials.

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Answer:

yes

Explanation:

Na2CO3 + H2SO4 --> Na2SO4 + H2O + CO2

Answer:

B : 4.6 billion years

Credits go to the person above me.

;)

Explanation:

EDGE 2021

The sun is about 4.6 billion years old. Therefore, option (B) is correct.

The Sun is made primarily of the elements hydrogen and helium. They account for 74.9% and 23.8% mass of the Sun in the photosphere. All heavier elements, called metals account for less than 2% of the mass, with oxygen (<1%), carbon (0.3%), neon (0.2%), and iron (0.2%) being the most abundant.

The hydrogen and helium in the Sun would have been produced by Big Bang nucleosynthesis and the heavier elements were produced by former generations of stars before the Sun was formed.

The amount of helium and its location within the Sun has gradually changed over the past 4.6 billion years. The proportion of helium has raised from about 24% to 60% due to fusion, and some of the He and heavy elements have settled from the photosphere toward the center due to gravity.

Therefore, the age of the sun is about 4.6 billion years.

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Answer:

its 19 I'm pretty sure about

Answer:

c is correct and my girl friend

Considering the Avogadro's Law, 1.52 moles are left in the container.

Avogadro's Law is a gas law that establishes the relationship between the amount of gas and its volume when temperature and pressure are held constant.

This law states that the volume is directly proportional to the amount of gas: if the amount of gas increases, the volume will increase; while if the amount of gas decreases, the volume decreases.

Mathematically the law can be expressed as:

\(\frac{V}{n}=k\)

Assuming that you have a certain amount of gas n1 that occupies a volume V1 and the amount of gas varies until a new value n2, then the volume will change to V2, and the following will be true:

\(\frac{V1}{n1}=\frac{V2}{n2}\)

In this case, you know:

Replacing in the Avogadro's Law:

\(\frac{65 L}{2 moles}=\frac{49.4 L}{n2}\)

Solving:

\(n2x\frac{65 L}{2 moles}=49.4 L\)

\(n2=\frac{49.4 L}{\frac{65 L}{2 moles}}\)

n2= 1.52 moles

Finally, 1.52 moles are left in the container.

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Chlorine in group 17 in the periodic table and includes halogens (also fluorine, bromine, and iodine)

Electron configuration of Cl : [Ne] 3s² 3p⁵

From this configuration, it can be seen that to obtain stability like the noble gas Ar - [Ne] 3s² 3p⁶, Chlorine will need one more electron so that its configuration is the same as Ar( become anion-Cl⁻)

Then it is said that Cl is reactive

And the Cl element is included in the non-metal group because it attracts electrons (electronegative)

The elements that include non-metals are halogens, noble gases, and 7 elements H, C, N, O, P, S, Se.

Each of the five test tubes was supposed to have hydrogen peroxide and pH 4 solution was added as its only contents.

What is hydrogen and its uses?

Many other applications exist for hydrogen. It is used by the chemical industry to generate ch4 and methanol, that are intermediate as in synthesis of polymers and medications, in addition to ammonia for soil amendment (the Haber process). With in course of a petroleum process, it's also employed to remove sulfur in fuels.

Why is hydrogen not used as a fuel?

However, it is not utilized as a household fuel for a number of reasons: Because it is expensive to produce and is not readily available, hydrogen.

Hydrogen is less common in the environment than other gases.

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To determine the number of moles of nitrogen trihydride (NH3) in 12.7g, we need to use its molar mass. The molar mass of NH3 is 17.03 g/mol 14.01 g/mol for nitrogen and 3.02 g/mol for hydrogen.

The First, we can calculate the number of moles of NH3 using the formula: moles = mass/molar mass moles = 12.7g / 17.03 g/mol = 0.745 moles Therefore, there are 0.745 moles of nitrogen trihydride in 12.7g. To calculate the number of moles of nitrogen trihydride in 12.7g, we need to know the molar mass of nitrogen trihydride (NH3). The molar mass of NH3 is 17.03 g/mol 1.

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Gasoline blending in petroleum refineries involves analyzing the properties of different components and determining the optimal mixing ratios to produce gasoline that meets specific octane rating and quality requirements.

Gasoline blending is a critical process in petroleum refineries where different components are combined to produce the desired gasoline product. In this example, the challenge is to blend gasoline from three different components.

To solve the gasoline blending problem, various factors need to be considered such as the desired octane rating, volatility, and environmental regulations. The first step is to determine the optimal proportion of each component based on their individual characteristics. This involves analyzing the properties of each component, such as its research octane number (RON), motor octane number (MON), and vapor pressure.

The second step is to develop a blending strategy that achieves the desired gasoline specifications. This involves determining the appropriate mixing ratios of the three components to meet the target octane rating and other quality requirements. The blending process requires precise calculations and adjustments to ensure the final gasoline product meets the desired specifications.

Additionally, economic considerations play a role in gasoline blending. The cost of each component and the market demand for specific gasoline grades can influence the blending decisions. Refineries aim to optimize the blend to minimize costs while meeting quality standards.

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Answer:

what I do is I make a song out of is

Answer: Not possible

Explanation: A mole is a unit of measurement in chemistry used to express the amount of a substance. One mole of a substance is equal to Avogadro's number of particles, which is 6.0022X10^23.

A soft drink is a liquid beverage that contains sugar, caffeine or other stimulants, and other ingredients such as carbonated water and artificial flavors. The volume of a soft drink is usually measured in liters.

The surface area of the earth is about 510.1 million square kilometers. TO find out how many times a mole of soft drink can cover the surface of the earth, We need to know the volume of a mole of soft drink and convert it to square kilometers. However, it's impossible to know the volume of a mole of soft drink without knowing the density of the specific beverage.

Amole is a unit of measurement that is used to express the amount of a substance, it;s not related to the volume or surface area of a physical object like the earth. so it's not possible to know how many times a mole of soft drink could cover the surface of the earth.

The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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Answer:

Sodium hydroxide + ammonium chloride — Sodium chloride + ammonia gas + water

Explanation:

NaOH + NH4Cl — NaCl + NH3 + H2O

a) Mg is oxidized and O2 is reduced

b) Zn is oxidized while Pb(NO3)2 is reduced.

Oxidation is defined as:

Reduction is defined as:

Looking at the first reaction, the Mg atom gains oxygen to become MgO. This means that Mg is oxidized. The oxidizing agent is O2. At the same time, O2 is being reduced and the reducing agent is Mg.

For the second reaction, the oxidation number of Pb is reduced from +2 to 0. Thus, Pb has been reduced by Zn while Zn itself has been oxidized. The reducing agent here is Zn while the oxidizing agent is Pb(NO3)2.

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Answer:

5-20 mins

Explanation:

Answer: The Mass of an electron is 9.1093837 x 10^-31 kgs

Explanation:

Answer:

Balanced Chemical Equation

2FeBr3 + 3Ba(OH)2 → 2Fe(OH)3 + 3BaBr2

Explanation:

Reaction Information

Ferric Bromide + Barium Hydroxide = Iron(III) Hydroxide + Barium Bromide

Reaction Type

Double Displacement (Metathesis)

Reactants

Ferric Bromide - FeBr3

FeBr3

Molar Mass of Br3Fe Oxidation State of Br3Fe

Barium Hydroxide - Ba(OH)2

Caustic Baryta Barium Hydroxide Lime Ba(OH)2 Barium Dihydroxide Hydrate

Molar Mass of BaH2O2 Oxidation State of BaH2O2

Products

Iron(III) Hydroxide - Fe(OH)3

Ferric Hydroxide Ferric Oxide Yellow

Molar Mass of FeH3O3 Oxidation State of FeH3O3

Barium Bromide - BaBr2

Molar Mass of BaBr2 Oxidation State of BaBr2

FeBr3 + Ba(OH)2 = Fe(OH)3 + BaBr2

Instructions

To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above.

i hope it's help you

Answer:

Explanation:

Heat energy always moves from hot to cold. The sunlight doesn't reach certain parts of the ocean due to it being so deep. The water above it absorbs it. So because this top water absorbs all the heat/energy, it is a lot warmer and is constantly transferring heat to the colder parts through kinetic energy. The warmer water has particles that have way more kinetic energy than the cold particles below it. And more kinetic energy means more movement, so that's why they transfer their heat to the colder particles.

I dont actually know if Im correct or not. Im just guessing based on what I know about physics.

The Hazardous Material class that includes compressed gases, dissolved gases, and gases liquefied by compression or refrigeration is Class 2: Gases. This class is further divided into three divisions:

1. Division 2.1 - Flammable Gases: These are gases that can burn in the presence of an ignition source. Examples include propane, butane, and hydrogen.
2. Division 2.2 - Non-Flammable, Non-Toxic Gases: These are gases that do not burn and are not toxic, but may still pose risks due to their physical properties, such as high pressure or low temperature. Examples include nitrogen, helium, and carbon dioxide.
3. Division 2.3 - Toxic Gases: These are gases that are harmful or even fatal when inhaled. Examples include chlorine, ammonia, and phosgene.

The proper handling, storage, and transportation of these gases are essential to minimize the risks associated with their hazardous properties. Regulations and guidelines are in place to ensure the safety of those working with and around these materials.

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In a new compound, it is found that the central carbon atom is sp2 hybridized, this implies that carbon is also involved in a pi bond.

Hybridization of Carbon-Carbon is one of the important and most common chemical elements that are essential for organic connections.

A carbon atom is sp2 hybridized when bonding takes place between 1 s- orbital with two p orbitals. There is a formation of two single bonds and one double bond between three atoms. The hybrid orbitals are placed in a triangular arrangement with 120° angles between bonds.

In sp2 hybridization, one s orbital and two p orbitals hybridize to form three sp2 orbitals, each consisting of 33% s character and 67% p character.

Therefore when the central carbon atom is sp2 hybridization then there must be carbon involves in a pi bond.

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