Earth Science, 25 points.
Review the properties and uses of the unknown mineral. It is...

(a) talc
(b) gypsum
(c) hematite
(d) quartz

Volume Measurement Laboratory Apparatus:

Graduated Cylinder: A cylindrical container with volume markings along its vertical axis, used for measuring liquid volumes with good accuracy.

Burette: A long, graduated tube with a stopcock at the bottom, used for precise measurement of volumes of liquids during titrations.

Pipette: A slender tube with a tapered tip used to transfer specific volumes of liquids accurately. Common types include volumetric pipettes and micropipettes.

Volumetric Flask: A flask with a precise volume marking, typically used for preparing solutions of known concentrations.

Mass Measurement Laboratory Apparatus:

Analytical Balance: A highly accurate balance used to measure the mass of solid samples or substances with high precision.

Top-loading Balance: A balance that measures the mass of larger samples or substances with slightly lower accuracy compared to an analytical balance.

Weighing Boat/Dish: A small container used to hold substances being weighed on a balance.

Weights: Standard weights of known mass used to calibrate and verify the accuracy of balances.

Fire Producers Laboratory Apparatus:

Bunsen Burner: A gas burner commonly used for heating, sterilization, and flame-related experiments.

Alcohol Burner/Spirit Burner: A small burner that uses alcohol as fuel to produce a controlled flame for heating applications.

Meker Burner: A type of gas burner that produces a hot, intense flame with multiple openings, commonly used in laboratory settings.

Safety Matches/Laboratory Matches: Matches designed to be more stable and resistant to accidental ignition, often used to light Bunsen burners and other flames safely.

It's important to note that when working with fire-producing laboratory apparatus, proper safety protocols, such as wearing protective equipment and handling flammable substances with caution, should always be followed to prevent accidents and ensure laboratory safety.

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The force that acts on the body is 53.55 N

According to the Newton law, the force is the product of the mass and the acceleration of a body. This is in accordance the Newton second law of motion. We now have to obtain the force that acts on the body.

Mass of the object =  15.3kg

Acceleration of the object = 3.5.0 m/s2

Force = 15.3kg * 3.50 m/s2

Force = 53.55 N

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Answer:

The number of shells are called period ,so in the periodic table there are places under a column written periods in bib charts

The density of the given stainless steel is 7.55 g/cm³.

Density is defined as the measure of how much “stuff” is in a given amount of space.

Determine the volume first to get the density , and the volume formula is,

Volume = Area × Thickness

Given,

Area = 2 cm × 2 cm = 4 cm²

Thickness = 100 cm

Substitute the values to get the volume,

Volume = 4 × 100 = 400 cm³

Where,

Density = mass / volume

Let's convert mass from kg to g = 3020 g

Substitute the values to get density,

Density = 3020 g / 400 cm^3

             = 7.55 g/cm³

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Answer:

C)0.0998kg

explanation:

1 POUND=0.453592...kg

It will form the following: mRNA sequence will be 3' AUG CCA GGG UCG AAU UUC GAA UAG GCC CA 5'.

What is mRNA sequence?

High-throughput sequencing methods are used in RNA sequencing (RNA-Seq) to reveal the transcriptome of a cell. Compared to prior Sanger sequencing- and microarray-based techniques, RNA-Seq provides far greater coverage and better resolution of the dynamic dynamics of the transcriptome. In addition to allowing for the quantification of gene expression, RNA-Seq data also allows for the identification of novel transcripts, the recognition of alternatively spliced genes, and the detection of allele-specific expression.

Recent advancements in the RNA-Seq approach, which entails sample preparation, library building, and data analysis, have allowed researchers to better comprehend the functional complexity of the transcription. In addition to polyadenylated messenger RNA (mRNA) transcripts, total RNA, pre-mRNA, and noncoding RNA, including microRNA and long ncRNA, can all be explored using RNA-Seq.

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Answer:

Newton believed that gravity was a force.

The law of universal gravitation offers a mathematical explanation for the attraction between the moon and Earth.

Newton was the first to have the idea that gravity is everywhere.

Answer:every object attract every other object

Explanation:

NaBr: Nearly neutral, K2SO3: Basic, NH4NO2: Acidic, K2HPO4: Basic

NaBr: Sodium bromide is a salt formed from a strong base (NaOH) and a strong acid (HBr). Salts of strong acids and strong bases are neutral, so NaBr is nearly neutral.

K2SO3: Potassium sulfite is a salt formed from a strong base (KOH) and a weak acid (H2SO3). Salts of strong bases and weak acids are basic, so K2SO3 is basic.

NH4NO2: Ammonium nitrite is a salt formed from a weak base (NH3) and a weak acid (HNO2). Salts of weak acids and weak bases can exhibit acidic or basic properties depending on their relative strengths. In this case, ammonium ions (NH4+) act as a weak acid, making NH4NO2 acidic.

K2HPO4: Dipotassium hydrogen phosphate is a salt formed from a strong base (KOH) and a weak acid (H3PO4). Similar to (b), salts of strong bases and weak acids are basic. Therefore, K2HPO4 is basic.

The predicted acidity or basicity of the given solutions is as follows: (a) nearly neutral, (b) basic, (c) acidic, and (d) basic. The nature of the solutions depends on the specific salts formed and the relative strengths of the acids and bases involved.

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Answer:

i think its solar radiation

(i) Tritium (3H) undergoes radioactive decay to produce helium-3 (3He) with a half-life of 12.32 years.

Using the radioactive decay law, we can calculate the amount of 3H that will decay into 3He over the given period:

t1/2 = 12.32 years

t = 1.5 years (from July 1, 1998, to Jan 1, 2000)

λ = ln(2) / t1/2 = 0.0562 year^-1

N(t) = N0 * e^(-λt)

where N(t) is the number of atoms at time t, N0 is the initial number of atoms, and e is the mathematical constant approximately equal to 2.718.

Plugging in the given values, we get:

N(1.5 years) = 10 Ci * (3.7 * 10^10 disintegrations/s/Ci) * (1 - e^(-λt)) = 2.76 * 10^19 atoms

To convert this into grams, we need to know the molar mass of 3He, which is 3.016 g/mol. Therefore, the mass of 3He produced will be:

m = N * M = 2.76 * 10^19 atoms * (3.016 g/mol / 6.022 * 10^23 atoms/mol) = 0.138 g

Therefore, on Jan 1, 2000, there will be 2.76 * 10^19 atoms of 3He and 0.138 grams of 3He.

(ii) To calculate the remaining amount of 3H, we can use the fact that the initial amount of 3H was 10 Ci, and we have already calculated the amount of 3H that has decayed into 3He. Therefore, the remaining amount of 3H is:

10 Ci - 2.76 Ci = 7.24 Ci

To convert this into grams, we can use the conversion factor:

1 Ci = 3.7 * 10^10 disintegrations/s

Therefore,

7.24 Ci * (3.7 * 10^10 disintegrations/s/Ci) * (1 mol/6.022 * 10^23 atoms) * (3.016 g/mol) = 0.015 g

Therefore, on Jan 1, 2000, there will be 0.015 grams of 3H remaining.

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To determine the final temperature of the gas, you need to apply Charles's Law and perform a temperature conversion from Celsius to Kelvin.

Charles's Law states that the volume of a gas is directly proportional to its temperature when pressure and the amount of gas are held constant. Mathematically, it can be represented as V1/T1 = V2/T2, where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature. Temperature should be in Kelvin for this calculation.

First, convert the initial temperature from Celsius to Kelvin: T1 = 23°C + 273.15 = 296.15 K. Next, use Charles's Law to find the final temperature (T2): (23 mL / 296.15 K) = (30 mL / T2). Solving for T2, you get T2 = (30 mL * 296.15 K) / 23 mL = 385.95 K. The final temperature of the gas is 385.95 K.

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Answer:

A. carrots look better when given more water

Answer:

Heat is released when they are both mixed together.

Explanation:

Physically or chemically, elements cannot be reduced farther since they are the most basic form of matter. A pure substance known as an element is one that has only one sort of atom.

their nuclear numbers of protons. The debate over the conceptual meaning of the word "element" offers a rather singular chance to look at how chemists currently relate to one atom.

A chemical approach is one that aims to alter the chemical make-up of the waste's constituent elements. Using 1 papers, Sample 1 Examples of using the chemical technique in a phrase In the chemical atom used in wastewater treatment, pollutants are taken out of the wastewater and released through discharge outlets.

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Answer:

B

Explanation:

Both plain and plateau have flat surfaces. However, a plain is located in a low-lying area while a plateau is located on an elevated area. In essence, a plateau can be viewed as an elevated plain or a plain that is bordered by cliffs.

The correct option is B.

The new pressure of the gas is 692 Pa.

Using the ideal gas law, PV = nRT, where P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature, we can solve for the new pressure.

Initially, we have P1V1 = nRT1, where P1 = unknown, V1 = 1.2 m3, n = 1.3 moles, R = 8.31 J/mol*K, and T1 = 400 K.

During the isochoric process, the volume remains constant, so V2 = V1 = 1.2 m3.

The final temperature is 2T1 = 2400 K = 800 K.

Now we can solve for P2:

P1 = nRT1/V1 = (1.3 mol)(8.31 J/mol*K)(400 K)/(1.2 m3) = 346 Pa

P2 = P1(T2/T1) = (346 Pa)(800 K)/(400 K) = 692 Pa

Therefore, the new pressure of the gas is 692 Pa.

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Answer:

Shear

Explanation:

Answer:

reactants

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction

Explanation:

product_The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction. In the equation above, the zinc and sulfur are the reactants that chemically combine to form the zinc sulfide product.

There is a standard way of writing chemical equations. The reactants are all written on the left-hand side of the equation, with the products on the right-hand side. An arrow points from the reactants to the products to indicate the direction of the reaction:

reactants → products

Reactants

1. The substances used as starting materials and which react with one another are reactants.

2. Example: In this reaction Mg and O2 are reactants.

Products

1. The substances which are formed as a result of reaction are products.

2. Example: In this reaction MgO is a product.

When vinegar was added to baking soda, A new product is formed as foam. Hence, it is s a chemical change.

A chemical change results from a chemical reaction forming new products while a physical change is when matter changes forms but not chemical identity.

Foam up with carbon dioxide gas,all of baking soda can be made react and disappear into vinegar solution and thus chemical reaction completes.

Hence, When vinegar was added to baking soda, A new product was formed Hence, it is s a chemical change.

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Answer:

Formula/Molecular Mass = 147.77415g/mol = 148g/mol (to 3 significant figures)

Explanation:

Given the Law of the Conservation of Mass, the amount of H2O produced will be equal to 10.00g-4.40g = 5.6g

Given equation n=m/M ,

n(H2O)= 5.6/ (1.008×2)+(15.999) = 0.318520677 moles

∴ x=0.318520677 moles

∴ Molecular mass (hydrated sodium sulfate) =

= (22.990×2)+(32.06)+(15.999×4)+[0.318...((1.008×2)+(15.999))]

= 147.77415g/mol

Answer:

Answer is in the attachment:

x=10

Explanation:

Acids are substances that turn wet blue litmus paper to red while bases are substances that turn red litmus paper to blue.

Acids and bases can be differentiated using their definitions as follows:

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Acid has hydrogen ion whereas base has hydroxyl ion.

Acid is a type of chemical compound that is dissolved in water and gives a solution with Hydrogen ions more than purified water. A base is a substance that gives electrons, takes protons, or releases hydroxide (OH-) ions. Acid is also called a proton donor. While a base is also called a proton acceptor.

Acids have a sour taste whereas Bases have a bitter taste. The pH value of acid is lower than 7. Basis has a pH value higher than 7. The strength of Acid depends on the number of Hydrogen ions. The strength of the Base depends on the amount  of Hydroxide ions

An acid is any hydrogen-carrying substance that is able of giving a proton that is to say a hydrogen ion to another substance. A base is a molecule or ion able to gain a hydrogen ion from an acid.

so we can conclude that the molecules which have hydrogen ions are considered acids while those molecules which have hydroxyl ions are considered bases.

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Answer:

choice D. Ionic, because valence electrons are transferred.

Explanation:

If the theoretical yield is 20 grams and the actual yield is 17 grams, the percent yield would be 85%.

To get the mass per mole, divide the reactant's mass by its molecular weight. As an alternative, we can multiply the millilitres of the reactant solution by the grams per millilitre of the liquid solution.

Once you have the theoretical yield, you can use the following formula to calculate the percent yield:

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

For example, if the theoretical yield is 20 grams and the actual yield is 17 grams, the percent yield would be:

percent yield = (17 grams / 20 grams) x 100% = 85%

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The partial pressure of Ne is 0.641 atm.

To calculate the partial pressure of Ne in the given mixture, we need to use the concept of mole fraction and the ideal gas law.

First, we calculate the number of moles of each gas present in the mixture. The number of moles is determined by dividing the mass of each gas by its molar mass.

For Ne:

Number of moles of Ne = 12.38 g / 20.18 g/mol = 0.613 mol

For Ar:

Number of moles of Ar = 12.43 g / 39.95 g/mol = 0.311 mol

Next, we calculate the mole fraction of Ne by dividing the moles of Ne by the total moles of both gases.

Mole fraction of Ne = 0.613 mol / (0.613 mol + 0.311 mol) = 0.663

Finally, we calculate the partial pressure of Ne by multiplying the mole fraction by the total pressure of the mixture.

Partial pressure of Ne = 0.663 * 1.60 atm = 1.065 atm

Rounding to three significant figures, the partial pressure of Ne is 0.641 atm.

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To clean powder fouling, corrosion, and dirt from outside parts of the lower receiver and extension assembly, one should use the best quality cleaning materials and methods.

Powder fouling, corrosion, and dirt can accumulate on the outside parts of the lower receiver and extension assembly, making it hard to maintain the rifle. It is essential to clean the weapon regularly to maintain its efficiency and longevity.

The following cleaning materials are required for the cleaning process:

Cleaning solvent

Cleaning brush

Microfiber cloth

Lubricant

The best solvent to use when cleaning the rifle is a powder solvent. This is because it is specifically designed to remove fouling from firearms. It is also essential to use a cleaning brush made of brass, nylon, or synthetic material to avoid damaging the parts of the lower receiver and extension assembly.

Brass brushes are best for removing fouling, while nylon and synthetic brushes are gentle on the metal parts and help prevent corrosion. Avoid using a steel brush when cleaning the rifle since it may scratch or damage the surface of the metal.Lubricant is also essential in maintaining the rifle. It helps keep the moving parts smooth and minimizes friction between metal parts.

A high-quality lubricant should be used, and the excess should be wiped off with a microfiber cloth. To clean the weapon, apply the cleaning solvent onto the brush and scrub the outside parts of the lower receiver and extension assembly, then wipe it off with a microfiber cloth. Ensure the surface of the metal parts is dry before applying lubricant. Apply lubricant to moving parts of the weapon.

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The most stable conformation of 3-isopropyl-1,1dimethylcyclohexane equatorial ethyl group (more stable).  The stability of ethylcyclohexane's equatorial conformer exceeds that of its axial conformer by 7.4 kJ/mol.

According to the previous section, the chair conformation with the equatorial methyl group is more stable because it reduces steric repulsion, and as a result, the equilibrium favors the more stable conformer. Strongly favoring the equatorial shape is methylcyclohexane. The methyl group is in close proximity to the axial hydrogens in the axial conformation, which has an energetically unfavorable effect known as a 1,3-diaxial interaction. The methyl group prefers the equatorial shape as a result.  The conformation of ethylcyclohexane in which the ethyl group is in the equatorial position is the most stable.

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Answer:

where the slope of the titration curve is the greatest

The titration curve can be used to identify the equivalency point of the titration.The volume of titrant is where the titration curve has the steepest slope.

How do you find the equivalence point on a titration curve?

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