Which of the following is the least important property of a mineral?
A streak
B hardness
C luster
D color

Gold's atomic construction is bigger than tin because of the existence of more protons and neutrons.

The disposting of atoms in gold follows what's called a "​face-centered cubic" (fcc) structure. Put directly, the atoms in gold form cubes, with an atom at each of the districts, and another atom in the center of each of the faces (you can see what this looks like in the image below). Gold is an element.

An atom of gold carries 79 protons, 79 electrons, and (most commonly) 118 neutrons, making it among the dense of naturally happen. Gold is a chemical element with 79 protons in each atomic nucleus. Every atom carrying 79 protons is a gold atom and all gold atoms.

So we can conclude that gold has the chemical formula Au. Gold atoms join together in a giant metallic structure. Atomic Structure.

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Answer:

use of sterile injections for clearanti bodies

Explanation:

Answer:

Hello There!!

Explanation:

They can be used in making products that make it lightweight such as in power tools and luggages.

hope this helps,have a great day!!

~Pinky~

Answer:pull

Explanation:

The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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Answer:

isotopes of elements with unstable nucleus releases nuclear radiation. generally the instability is related to the neutron to proton ratio in the nucleus of an atom

Answer

So, you that your hydrogen peroxide solution had a volume of 5 mL. The density of this solution was listed at

1.02 g/mL.

The weight by volume percent concentration,

%w/v, for a hydrogen peroxide solution that has that density is listed at 6.6%.

Answer:

In this reaction, Ca(OH)2 is a reducing agent. It reacts with hydrogen chloride to form calcium chloride and water. Therefore, the following reaction shows that matter is neither created nor destroyed in a chemical reaction: Ca(OH)2 + 2HCI -> CaCl2 + 2H20. The formation of calcium chloride and water from the hydrolysis of calcium hydroxide is not an example of matter being created or destroyed in a chemical reaction because it does not involve the breaking down of any bonds between atoms.

Explanation:

Flammable solids are materials that are assigned to hazard classes based on their chemical structure.

The classification of chemical compound based on their hazardous nature include the following:

Most oftentimes symbol are being used for a better understanding and fast passage of information to passerby t.

Therefore, flammable solids are materials that are assigned to hazard classes based on their chemical structure.

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Lithium-7 has 3 protons and 4 neutrons, carbon-6 has 2 protons and 4 neutrons, while beryllium-8 has 4 protons and 4 neutrons.

No matter how many neutrons or electrons are present, the nucleus of a lithium atom always has three protons. The atomic number for lithium is always 3, which is evident given that the lithium atom always has three protons. Yet, the mass number in the isotope with 3 neutrons is 6 and in the isotope with 4 neutrons is 7.

Negatively charged subatomic particles include electrons. A category of subatomic particle having a positive charge is the proton. The strong nuclear force holds the protons together in the atom's nucleus. A subatomic particle with no charge is called a neutron (they are neutral).

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The mass in grams of 4.60 x 10^23 atoms is approximately 9.17 g.

To find the mass in grams of 4.60 x 10^23 atoms, we need to consider the molar mass and Avogadro's number. Avogadro's number (6.022 x 10^23) represents the number of atoms or molecules in one mole of a substance.

First, we need to determine the molar mass of the substance in question. Let's assume we are dealing with a specific element, such as carbon (C), which has a molar mass of approximately 12.01 g/mol.

To calculate the mass in grams, we can use the following formula:

Mass (in grams) = (Number of atoms / Avogadro's number) x Molar mass

Substituting the given values:

Mass (in grams) = (4.60 x 10^23 atoms / 6.022 x 10^23) x 12.01 g/mol

Calculating the expression:

Mass (in grams) = (0.763 mol) x 12.01 g/mol

Mass (in grams) = 9.17 g

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Answer:

b. upper mantle

Explanation:

low velocity zone of the upper mantle

Answer:

A change in temperature is characteristic of a chemical change. ... If temperature increases, as it does in most reactions, a chemical change is likely to be occurring. This is different from the physical temperature change. During a physical temperature change, one substance, such as water is being heated.

Answer:

If a reaction is a chemical reaction, then a change of temperature can be noticed, it can either be endothermic  (a decrease in temp.) or it can be exothermic (increase in temp.). Any kind of change in temperature of a substance is considered as a characteristic of a chemical reaction.

Based on the description of the potential energy diagram provided, the diagram made by the student appears to be correct.

The potential energy diagram represents the energy changes that occur during a chemical reaction. In an endothermic reaction, the products have higher potential energy than the reactants, meaning energy is absorbed from the surroundings.

The curve line on the graph indicates the energy changes throughout the reaction pathway. It starts at a higher level, representing the initial potential energy of the reactants. As the reaction progresses, the potential energy decreases, indicating the formation of products with lower potential energy.

The broken horizontal line from point X on the y-axis to the point where the curve begins represents the activation energy (Ea) of the reaction. Activation energy is the energy barrier that must be overcome for the reactants to convert into products.

Point X on the y-axis indicates the potential energy of the reactants at the start of the reaction, and the broken line shows the energy required to initiate the reaction.

The broken horizontal line from point Y on the y-axis to the point where the curve ends represents the potential energy of the products. Point Y represents the potential energy of the products at the end of the reaction.

Overall, the student's diagram correctly represents an endothermic reaction, showing the potential energy changes, the activation energy, and the final potential energy of the products. The curve line starts at a higher level (representing the higher potential energy of the reactants) and ends at a slightly lower level (representing the lower potential energy of the products).

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Answer:

Combustion

Explanation: Because a reactant is reacting with O2.

Answer:

The naturally acidic rain will gradually wear the mountain of limestone away.

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The highest electric force exerted by charges -4 ×10⁻⁵ C and 3 ×10⁻⁵ C  placed 0.5 m apart is equal to 43.15 N.

The lowest electric force exerted by charges 3 ×10⁻⁵ C and 3 ×10⁻⁵ C  placed 1 m apart is equal to 8.10 N.

According to Coulomb’s law, the force of attraction between two charges is equal to the product of their charges and is inversely proportional to the square of the distance. This electric force applies along the line joining the two charges.

The magnitude of the electric force can be written as follows:

\(\displaystyle F = k\frac{q_1q_2}{r^2}\)

where k is constant proportionality = 8.99 × 10⁹ N.m²/C².

Given the charge on one point charge, q₁ =  4 ×10⁻⁵ C

The charge on the other point charge, q₂ = - 3 × 10⁻⁵C

The distance between these two charges, r = 0.5 m

The magnitude of electric force between the charges  will be:

\(\displaystyle F = 8.99\times 10^{9}\times \frac{4\times 10^{-5}\times 3\times 10^{-5}}{(0.5)^2}\)

F = 43.15 N

Given the charge on one point charge, q₁ =  3 ×10⁻⁵ C

The charge on the other point charge, q₂ = 3 × 10⁻⁵C

The distance between these two charges, r = 1 m

The magnitude of force between the charges will be:

\(\displaystyle F = 8.99\times 10^{9}\times \frac{3\times 10^{-5}\times 3\times 10^{-5}}{(1)^2}\)

F = 8.1 N

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer:

Heterogenous

Explanation: Because its not one uniform thing.

The term that best describes Max's bowl of cereal is a heterogeneous mixture.

A heterogeneous mixture is a chemical term that refers to those mixtures in which its components can be distinguished with the naked eye.

One of the distinctive characteristics of heterogeneous mixtures is that the substances that compose them retain their properties and can be separated by physical procedures such as:

According to the above, Max's bowl is an example of a heterogeneous mixture because milk and cereals can be distinguished with the naked eye and these can be separated using a physical procedure.

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Answer:

Explanation:

The density would be 4.

Answer:

A. Protein disulfide is oxidized.

Explanation:

When thiol reagents are introduced with some protein solutions they react with molecules of disulfide and oxidize the protein. There occurs inter-conversion of thiol molecules into free disulfide molecules. The DTT reduces the disulfide molecules bonds of proteins and it starts to peptide.

Answer:

HI is the Arrhenius acid

CsOH is the Arrhenius base

Explanation:

Acid-Base reactions are reactions that involve the transfer of protons.

Arrenhius Acids

Arrenhius acids are molecules that have an H⁺ ion. In an acid-base reaction, the acid will donate the H⁺ ion to the base. The molecule HI (called hydroiodic acid) is the acid because it has an H⁺ ion. Note that an H⁺ ion is simply a proton because it has no electrons or protons.

H₂O can also be considered an Arrhenius acid because it does have an H⁺ ion, but it is a very weak acid.

Arrenhius Bases

Arrhenius bases are molecules that have an OH⁻ ion. In an acid-base reaction, the base will accept an H⁺ ion. The molecule CsOH (called cesium hydroxide) is the base because it has an OH⁻ ion. The OH⁻ ion is one of the most common polyatomic ions and is called hydroxide.

H₂O can also be considered an Arrhenius base because it has an OH⁻ ion. However, it is a weak base. Still, water is very important to acid-base reactions because it can be either an acid or a base.

In the reaction HI + CsOH + H2O, HI is the Arrhenius acid and CsOH is the Arrhenius base.

In the given reaction HI + CsOH + H2O, HI is the Arrhenius acid and CsOH is the Arrhenius base. In the Arrhenius theory of acids and bases, an acid is a substance that produces hydrogen ions (H+) in aqueous solution, while a base is a substance that produces hydroxide ions (OH-) in aqueous solution. HI can dissociate in water to produce H+ ions, making it an acid. CsOH can dissociate in water to produce OH- ions, making it a base.

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A negative charge indicates that an item contains more electrons than protons, that's why an object might be classified as having a negative electrostatic charge.

An item has an excess of electrons and is considered to have a negative charge when it obtains electrons. When an item loses electrons, it is considered to have a positive charge because it lacks electrons. Static electricity is the accumulation of electric charges.

Transferring electrons to or taking them away from an item produces an electrical charge. When electrons are introduced to an item, it acquires a negative charge due to the negative charge of electrons.

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Answer:

neutral atoms coming together to share electrons

Answer:

a

Explanation:

neutral atoms coming together to share electrons

The mass of sodium hydrogen carbonate : 10.5 g

Given

1.5 dm' of CO₂

1 mol gas= 24 L at RTP(25 °C, 1 atm)

Required

the mass of sodium hydrogen carbonate

Solution

Decomposition reaction of Sodium hydrogen carbonate :

2 NaHCO₃ (s) ⇒ Na₂ CO₃ (s) + H₂ O(g) + CO₂ (g)

mol CO₂ :

\(\tt mol=\dfrac{1.5}{24}=0.0625\)

From the equation, mol ratio of NaHCO₃ : CO₂ (g) = 2 : 1, so mol NaHCO₃ :

\(\tt 2\times 0.0625=0.125\)

Mass NaHCO₃(MW=23+1+12+3.16=84 g/mol) :

\(\tt mass=mol\times MW\\\\mass=0.125\times 84\\\\mass=10.5\)

Solubility because when you have to test for it you need to add another liquid to the pure substance and that may cause a chemical change

The testing of the property of a substance that results in the substance being changed into a different substance is chemical properties.

The substances have been exhibited with physical and chemical properties. The physical properties have been based on the physical state or the appearance of the substance.

It can be a state of substance, luster, malleability, conductivity, etc. The test for physical properties does not allow the substance to turn into a new substance.

The chemical properties have been the nature of the substance when it reacts with another substance, This results in the formation of a new substance. Thus the testing of the chemical properties of the substance may result in the substance being changed into a different substance.

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The resistance has a linear relationship with temperature because it increases as temperatures increases.

Temperature refers to the activity (motion or thermal energy) in the atoms that form molecules.

The resistance of an electric conductor increases as the temperature increases since the thermal energy of subatomic electrons also increases.

In conclusion, the resistance has a linear relationship with temperature because it increases as temperatures increases.

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