what information is given on a material safety data sheet?

In their resting state, all body cells exhibit a resting membrane potential ranging from -50 to about -100 millivolts. So, the statement is false.

The fundamental units of all living things are cells. There are many billions of cells in a human body.

They give the body structure, consume nutrients from meals, transform those nutrients into energy, and perform certain tasks.

All bodily cells are polarised because they all have a resting membrane potential when they are at rest.

All body cells, depending on the kind of cell, have a resting membrane potential that normally ranges from -50 to -100 millivolts. All cells are considered to be polarised as a result.

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Answer:

I) option A - Amount of fertilizer

II) Option B - Number of Algae cells

II) Option C - Amount of fertilizer

Explanation:

I) A dependent variable in an experiment is basically the output/byproduct of other elements and they are therefore dependent on the the independent variables.

In this experiment, the growth in amount of algae depends on the amount of fertilizer added to the beakers.

Thus, the dependent variable in the experiment is the number growth of algae cells.

So option B is correct.

II) In the experiment, an independent variable could be defined as the inputted substance or quantity that can be changed.

For example, the amount of fertilizer can be changed independently because it does not depend on anything whereas other results depends on it.

Thus, the independent variable in this experiment is the amount of fertilizer added to the beakers.

Option d is correct

III) A controlled variable is defined as one which is kept constant throughout an experiment/study.

A controlled variable doesn't alter with the result of an experiment/study. However, if it is altered, it can affect the relationship/correlation between the Independent and Dependent Variable.

Thus, the amount of fertilizer is not the controlled variable in this experiment.

Option C is correct.

Answer:

Copper will start to react with the oxygen in the air to form copper oxide. The copper oxide will continue reacting to oxygen over time. As the copper oxide continues to react with carbon dioxide and water in the air it coats the surface with that iconic blue-green patina colour

Answer:

The rock cycle is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. All rocks are made up of minerals.

To solve this problem, I'll need some additional information related to the molar mass of butane (C4H10). Please provide the molar mass of butane so that I can proceed with the calculations.

A muffi n recipe calls for cream of tartar, or potassium hydrogen tartrate. The amount of cream of tartar that is required contains 2.56 ×10²³atoms of carbon. 0.42moles of potassium hydrogen tartrate is required

In the Global System of Units (SI), the mole represents the unit of material quantity. How many fundamental entities of a particular substance are present within an object a sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecular structure, an ion, a charged particle pair, or a particle that is subatomic like a proton depending on the makeup of the substance.

For instance, despite the fact that the two substances have different volumes and masses, 10 moles of water because 10 moles of the chemical element mercury both contain the same quantity of stuff, because the mercury comprises exactly one particle for each molecule of water.

mole = 2.56 ×10²³/ 6.022×10²³

       = 0.42moles

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Answer: transmits yellow light

Explanation:

Answer:

Explanation:

40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ

Answer:

1.000 atm

Explanation:

Step 1: Write the reversible reaction

A(g) ⇌ 2 B(g)

Step 2: Calculate the reaction quotient

Q = [B]²/[A]

Q = 0.030²/0.50

Q = 0.0018

since Q < Kp, the reaction will proceed to the right

Step 3: Make an ICE chart

       A(g) ⇌ 2 B(g)

I      0.50      0.030

C       -x          +2x

E    0.50-x    0.030+2x

Step 4: Find the value of "x"

We will use the definition of the pressure equilibrium constant.

Kp = 67.2 = [B]²/[A] = (0.030+2x)²/0.50-x

33.6 - 67.2x = 0.0009 + 0.12x + 4x²

4x² + 67.32x -33.5991 = 0

We solve this quadratic equation and we get x=0.485112  and x=−17.3151 (neglected).

Step 5: Find the partial pressure of B at equilibrium

pB = 0.030+2x = 0.030+2(0.485112) = 1.000 atm

The equilibrium partial pressure of B would be:

\(1.000 atm\)

Reversible Reaction

Given that,

Reaction

\(A(g)\) ⇄ \(2 B(g)\)

Charge on the reaction vessel \(= 0.50 atm\) of A

\(0.030 atm\) of B

To find,

Reaction quotient first

\(= B^2/A\\= (0.030)^2/0.50\\= 0.0018\)

This shows that the reaction quotient is greater than Kp.

Through the reaction \(A(g)\) ⇄ \(2 B(g)\), ICE can be drawn

I      \(0.50\)      \(0.030\)

C    \(-x\)        \(+2x\)

E    \(0.50-x\)   \(0.030+2x\)

Now,

We will determine the value of \(x\),

Kp \(= 67.2\)

\(= [B]^2/[A]\)

\(= (0.030+2x)^2/0.50-x\)

⇒ \(33.6 - 67.2x\) \(= 0.0009 + 0.12x + 4x^2\)

⇒ \(4x^2 + 67.32x -33.5991 = 0\)

∵ \(x = -17.3151\)

Therefore, Equilibrium Partial Pressure

\(= 0.030+2x\)

\(= 0.030+2(0.485112)\)

= \(1.000\) atm

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Answer:

(25°C × 9/5) + 32 = 77°F

Explanation:

hope this helps

Answer:

Im 98% sure it's 77 F

2 moles of water produces from 2 moles of hydrogen and 1 moles of oxygen. 2 molecules of water produces from 2 molecules of hydrogen and 1 molecules of oxygen. 2 liters of water produces from 2 liters of hydrogen and 1 liter of oxygen

Water is a substance that exists in gaseous, liquid, & solid phases and is made up of chemical components such as hydrogen and oxygen. Of the most prevalent and necessary substances is it. a liquid that is flavourless and odourless at normal temperature.

It has the critical capacity to dissolve a wide variety of other compounds. In fact, living things depend on water's adaptability as a solvent. It is thought that life first appeared in the water-based solutions of the oceans of the earth.

2H\(_2\)(g) + 0\(_2\)(g) → 2H\(_2\)O(g)

2 moles of water produces from 2 moles of hydrogen and 1 moles of oxygen

2 molecules of water produces from 2 molecules of hydrogen and 1 molecules of oxygen

2 liters of water produces from 2 liters of hydrogen and 1 liter of oxygen

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Answer:

Hey! sorry if im late but the

answer is :

C : Plants that are used to make the product can be replaced.

I hope this helps everyone out there!

Explanation:

i guessed lol

Answer:

C) Plants that are used to make the product can be replaced

Explanation:

Sorry I’m late I just did the test and got 100%

Explanation:

For dissolving dry mortar on floor tiles, you can use concrete and mortar dissolver. You can find this product at your local hardware store or online12.

For removing KMnO stains, you can use vinegar. Mix vinegar with water and spray or pour it on the tile surface. Let the vinegar water set in for a few minutes, then sponge the entire area to get it as clean as possible. Next, use a razor blade or scraper to peel up the mortar. Be careful not to gouge or scratch the tiles3.

KMnO is potassium permanganate. it makes water drinkable if it's polluted

For drying acid anhydrides, you can use calcium chloride. Calcium chloride is a hygroscopic substance that absorbs moisture from the air and can be used as a desiccant.

desiccants keeps things dry so they last longer like food & clothes

bingAI

Answer:

a liquid

Explanation:

A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer:

ask a teacher is the correct answer.

Explanation:

You must ALWAYS ask a teacher if you are not sure about what to do during a lab activity.

Answer:

It's important to ask the teacher, lab safety policies all state that if you're confused about instructions it's always good to ask the teacher to clarify them.

The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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Answer:obtain and use resources, grow, reproduce, and maintain stable internal conditions while living in a constantly changing external environment.

Explanation:

All successful organisms must be able to do the three things including obtain energy, produce offspring, maintain their structure. The correct option is B.

In biology, an organism is any natural, living system that functions as a separate entity. Cells make up all organisms.

Taxonomy divides organisms into groups such as multicellular animals, plants, and fungi, or unicellular microorganisms such as protists, bacteria, and archaea.

The current classification system is based on the Linnean system and has eight levels of taxa: domain, kingdom, phylum, class, order, family, genus, and species.

All successful organisms must be able to do three things: obtain energy, generate progeny, and maintain their respective structure.

Thus, the correct option is B.

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Answer:

Helium-4 atom

Alpha particle, positively charged particle, identical to the nucleus of the helium-4 atom, spontaneously emitted by some radioactive substances, consisting of two protons and two neutrons bound together, thus having a mass of four units and a positive charge of two.

Explanation:

hope this helps

Helium (⁴₂He) atoms are chemical species called alpha particles.

Alpha particles or Alpha rays are positively charged particles emitted from the decay of several radioactive materials. The mass of the Alpha particle is due to the two protons and two neutrons. Therefore, the Alpha ray nucleus is very identical to the nucleus of the Helium atom. They are denoted by the Greek alphabet α.

An alpha particle is also known by the interchangeable term doubly ionized helium nuclei (He²⁺). The mass of an alpha particle is equal to 6.64 × 10⁻²⁷ Kg. Alpha particles are usually formed during the standard radioactive decay of atomic nuclei.

Alpha particles have an average kinetic energy of 5MeV and a velocity of 5% of that of the velocity of light. They are also generated in high-energy particle accelerators. They are highly ionized particles and have low penetration depth compared to other subatomic particles.

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The chemical formula for x and y is Cu₂O and CuO. The mass cooper which can react with 0.5g of oxygen to yield x and y is 2.745 g.

A chemical formula is a phrase that lists the constituent parts of a compound together with their relative quantities. No subscript is used if there is just one atom of a certain kind. A subscript is added to the symbol of an atom if it contains two or more of a certain type of atom.

1. 1.535 g of X → 1.365 g of Copper

1.535 – 1.365 = 0.170g of Oxygen

Atomic weight of Cu = 63.5,

Atomic weight of Oxygen = 16

For Cu 1.365 g / 63.5 = 0.02 mol

For Oxygen 0.170 g / 16 = 0.01 mol

X = Cu₂O

1.450 g of Y → 1.160 g of Cu

1.450 – 1.160 = 0.290 g of Oxygen

For Cu = 1.160 g / 63.5 = 0.018 mol

For Oxygen = 0.290 g / 16 = 0.018 mol

Y = CuO

2. The total mass of Oxygen = 0,170 g + 0,290 g

= 0.460 g

Total mass of Cu = 1.160 g + 1. 365 g

= 2.525 g

0.460 g of Oxygen → 2.525 g of Cu

0.500 g of Oxygen → (2.525 x 0.5) / 0.460

= 2.745 g of Cu

Thus, The law of multiple proportions was formulated by John Dalton in 1804.

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There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

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At STP, a container holds 1.01 g of hydrogen and 64.00 g of oxygen gas. What's the container volume?

In the container we have 1.01 g of H₂ and 64.00 g of O₂. The first step to solve the problem is to find the number of moles of each gas that we have in the container. To do that we have to find the molar mass of each gas. We have to look for the atomic mass of each element in the periodic table.

atomic mass of H: 1.01 amu atomic mass of O: 16.00 amu

Using those values we can find the molar mass of H₂ and the molar mass of O₂.

molar mass of H₂ = 2 * 1.01

molar mass of H₂ = 2.02 g/mol

molar mass of O₂ = 2 * 16.00

molar mass of O₂ = 32.00 g/mol

Using the molar mass of each gas we can find the number of moles of each gas that we have in the container.

mass of H₂ = 1.01 g mass of O₂ = 64.00 g

number of moles of H₂ = mass of H₂/(molar mass of H₂)

number of moles of H₂ = 1.01 g/(2.02 g/mol) = 1.00 mol

number of moles of H₂ = 0.50 mol

number of moles of O₂ = mass of O₂/(molar mass of O₂)

number of moles of O₂ = 64.00 g/(32.00 g/mol)

number of moles of O₂ = 2.00 moles

So we found that the container holds 2.00 moles of oxygen and 0.50 mol of hydrogen at STP. Using the ideal gas law we can find the volume of the container.

n = total number of moles = number of moles of O₂ + number of moles of H₂

n = 2.00 moles + 0.50 moles

n = 2.50 moles

The container is at STP, that means: P = 1.00 atm T = 273.15 K

P * V = n * R * T

V = n * R * T / P

V = 2.50 moles * (0.082 atm*L/mol*K) * 273.15 K / ( 1.00 atm)

V = 56.0 L

P * V = n * R * T

V = n * R * T / P

V = 2.50 moles * (8.314 kPa*L/mol*K) * 273.15 K / ( 101.325 kPa)

V= 56.0 L

Answer: The volume of the container is 56.0 L

Answer:

It's True.

Explanation:

Matter is anything that has mass and takes up space. Mass gives an object the property of weight and inertia (resistance to change in the motion of an object). There are four states of matter, solid, liquid, gas, and plasma.

According to the given statement 16.2 L is the balloon’s volume at 22°C and a pressure of 742 mmHg.

The correct option is C.

Volume is a unit used to describe how much space a substance takes up. A physical material with mass and space-occupying properties is referred to as matter. The common unit of volume in physical sciences like chemistry is the cubic metre.

PV=nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant

T is the temperature

Calculating n:

n= mass/molar mass of carbon dioxide

n = 28.8/44

n = 0.6545 mol

T = 22C⁰ + 273

T = 295 K

P = 742mmHg * 1atm/760mmHg

P = 0.976315 mmHg

R=0.0821 L atm/mol.K

V = nRT/P

V = 0.6545 * 0.0821 * 295/0.976315

V = 16.2 L

Volume of the balloon at a temperature of 22⁰ C is 16.2 L.

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Hess's law is used to measure the enthalpy of a desired chemical reaction because: D. Intermediate equations with known enthalpies are added together.

Hess's Law is also known as Hess's law of constant heat summation (enthalpy) and it was named after a Swiss-born Russian chemist called Germain Hess.

Hess's Law states that the energy change (enthalpy) experienced in a desired chemical reaction is equal to the sum of the energy changes (enthalpies) in each chemical reactions that it is made up of or contains.

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a. a red blood cell is microscopic;b.a snow ball is macroscopic;c. baking powder Particulate

a. Microscopic - A red blood cell is too small to be seen with the blind eye and must be observed under a microscope.

b. Macroscopic - A snowball is large enough to be seen with the blind eye

c. Particulate - Baking powder is a fine powder made up of microscopic particles.Macroscopic refers to anything that can be seen with the blind eye . Microscopic refers to anything that requires a microscope to be seen. Particulate refers to materials that are made up of tiny particles or molecules, such as dust, smoke, and gas.

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complete question:Classify each of the following as either macroscopic, microscopic or particulate:

a. a red blood cell.

b.a snow ball

c. baking powder.

According to the explanation given in our last session, we will be using the Molarity formula again, but now we want to find the number of moles

M = n/V

We have:

M = 2.20 M

V = 0.065 L, we use volume in Liters

2.20 = n/0.065

n = 0.143 moles of NaOH, letter D