solid sodium chromate is slowly added to 75.0 ml of a 0.0594 m calcium nitrate solution. the concentration of chromate ion required to just initiate precipitation is

Answer:

h20 water is the answer

Answer:

as the potential energy decrease the kinetic energy increases

Explanation:

at the cliff it possess maximum potential energy but as it falls it possess maximum Kinetic energy

When the rock is still stationary at a height, it possess all potential energy. As it begins to fall from the height, potential energy decreases and kinetic energy increases.

Energy transformations involve the change of energy from one form to another in accordance with the principle of energy conservation.

For a rock found at a height, all it has is potential energy. This potential energy decreases when the rock begins to fall and kinetic energy increases accordingly.

Hence, for a rock that falls off a cliff, as the potential energy increases, the kinetic energy increases.

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Answer:

the state of matter changed

Explanation:

Answer:

A) A precipitate is formed

Explanation:

occurs in aqueous solution when two ions bond together to form an insoluble salt, which is known as the precipitate.

Answer:

i good at chemistry

Explanation:

not all but i try

Bonds that possess between 5 and 50 ionic character are considered to be polar covalent bonds. Polar covalent bonds occur when two atoms with different electronegativities share electrons unequally.

This results in a partial positive charge on the less electronegative atom and a partial negative charge on the more electronegative atom. The greater the difference in electronegativity between the two atoms, the more polar the bond will be.

When the electronegativity difference is large enough (greater than 1.7), the bond is considered ionic, meaning that one atom has completely lost its electron(s) to the other atom. However, when the electronegativity difference is between 0.5 and 1.7, the bond is considered polar covalent.

In the case of bonds with between 5 and 50 ionic character, the electronegativity difference is not large enough for the bond to be considered fully ionic, but it is significant enough for the bond to be polar covalent. Therefore, bonds with between 5 and 50 ionic character are classified as polar covalent bonds.

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The work done by the system is -11.82 L atm and the change in internal energy of water during vaporization is 161.36 kJ.

The problem describes the endothermic vaporization of 1 mole of liquid water at 100.9°C and 1.00 atm. We are given the volume occupied by 1.00 mole of liquid and vapor water at 100.0°C and 1.00 atm. Using this information, we can calculate the change in volume when 1 mole of liquid water vaporizes.
The work done by the system is equal to -PΔV, where P is the constant pressure of 1.00 atm and ΔV is the change in volume. Substituting the values, we get work done = -1.00 atm x [(30.62 L) - (18.80 mL/1000)] = -11.82 L atm.
The change in internal energy can be calculated using the first law of thermodynamics, ΔE = q + w. Since the process is endothermic, q is positive and equal to the heat absorbed during vaporization. Using the given enthalpy change and moles of water vaporized, we get q = (4.25 mol) x (40.7 kJ/mol) = 173.18 kJ.

Therefore, ΔE = 173.18 kJ - 11.82 L atm = 161.36 kJ.
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Answer:

Since wet is12 and dry is 16

You take 16-12=4

Answer:

Explanation:

The mass of the bone sample can be found by using the formula

mass = density × volume

From the question

density = 1200mg/cm^3

volume = 39.5cm^3

We have....

mass = 1200 × 39.5 = 47400

We have the final answer as

Hope this helps you

Answer:

16 g

Explanation:

Step 1: Write the balanced equation

2 Na + Cl₂ ⇒ 2 NaCl

Step 2: Identify the limiting reactant

The theoretical mass ratio (TMR) of Na to Cl₂ is 46:71 = 0.65:1.

The experimental mass ratio (EMR) of Na to Cl₂ is 10:10 = 1:1.

Since EMR > TMR, Cl₂ is the limiting reactant

Step 3: Calculate the mass of NaCl produced

The theoretical mass ratio of Cl₂ to NaCl is 71:117.

10 g Cl₂ × 117 g NaCl/71 g Cl₂ = 16 g NaCl

Answer:

Because it is the same element but has different atomic mass

The melting point of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone is not readily available in literature. Boiling point is 396°C and density is 1.23 g/cm³.

It is important to note that the physical properties of a compound can be affected by various factors, such as impurities and environmental conditions, so the reported values may not be exact for every sample.

Additionally, the physical properties of a compound can provide important information about its structure and properties, which can be useful in predicting its behavior in different applications.

Thus, knowing the melting point, boiling point, and density of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone can be helpful in understanding its physical properties and potential applications.

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Answer:

More mass means more force is needed to achieve the same change in speed in the same amount of time. That force is transmitted from the road, to the tires, to the wheels, through the brakes, to the frame and rider.

The weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

Acceleration is defined as the rate of change of velocity of an object with respect to time. These are vector quantities which have magnitude as well as direction.

The orientation of the acceleration of an object as given by the orientation of the net force acting on that object. It is expressed as:

\(\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}\overline{a} = average acceleration\\v = final velocity\\v_0 = starting velocity\\t = elapsed time\)

Acceleration is proportional to the force applied, so the greater the force, the greater the speed of the object in the direction of the force. Mass is inertia, which is the reluctance to accelerate, so for the same force, more massive objects experience smaller acceleration than less massive objects.

Thus, the weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

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The best listed approach for viewing spots that are not visible on a TLC plate is to view the TLC plate under a microscope. Option Ob is correct. And Nature of aniline is a weak base hence, option Ob is correct.

A thin layer chromatography (TLC) plate is a plate made of plastic or glass, covered with a thin layer of absorbent material, typically silica gel, aluminum oxide, or cellulose. The most widely used adsorbent is silica gel.

The best listed approach for viewing spots that are not visible on a TLC plate is to view the TLC plate under a microscope. The spots may not be visible to the unaided eye, but they can be seen using a UV lamp or under a microscope.

So, you can rule out the option O_d which suggests to dip the TLC plate in a colored liquid, as it will not help in viewing the spots. Estimating the location of the spots and marking them with a pencil can be helpful but may not be accurate.

Nature of Aniline: Aniline is a weak base.

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Answer:

Explanation:

The answer is B

Answer:

a: palladium or Pd

b: arsenic or As

c: magnesium or Mg

d: radon or Rn

e: francium kr Fr

Explanation:

i looked at the periodic table haha

a. The element in group 10 and period 5 is palladium or Pd. b. The element in group 15 and period 4 is arsenic or As.  c. The element in group 2 and period 3 is magnesium or Mg. d. The element in group 18 and period 6 is  radon or Rn. e. The element in group 1 and period 7 is francium or Fr.

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

A substance is considered to be an element if it cannot be reduced to a less complex form. They can be identified by their particular atomic number. The periodic table groups the elements according to their atomic number and draws attention to those with related qualities.

Each element's atom contains a specific number of protons. For instance, a carbon atom has six protons compared to the one proton in a hydrogen atom. Ions are created by changing the number of electrons in an element's atom.

Thus,  The element in group 10 and period 5 is palladium or Pd.

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Answer:

Wavelength of electromagnetic wave = 4.0 × 10³

Explanation:

Given:

Wavelength of electromagnetic wave = 4000 meter

Find:

Write, Wavelength of electromagnetic wave into scientific notation

Computation:

Wavelength of electromagnetic wave = 4000 meter

Wavelength of electromagnetic wave = 4.0 × 1,000 meter

Wavelength of electromagnetic wave = 4.0 × 10³

So,

Option "B" is the correct answer to the following question.

To solve this problem, we need to use the concept of Avogadro's number and the molar mass of the compound.

The molar mass of (NH4)3PO4 can be calculated by adding the molar mass of its individual elements:

M(N) = 14.01 g/mol

M(H) = 1.01 g/mol

M(P) = 30.97 g/mol

M(O) = 16.00 g/mol

Molar mass of (NH4)3PO4 = 3(M(N) + 4M(H)) + M(P) + 4(M(O))

= 3(14.01 g/mol + 4(1.01 g/mol)) + 30.97 g/mol + 4(16.00 g/mol)

= 149.09 g/mol

Now, we can calculate the number of moles of (NH4)3PO4 in 2.00 g sample:

Number of moles = mass ÷ molar mass

= 2.00 g ÷ 149.09 g/mol

= 0.0134 mol

Finally, we can use Avogadro's number to convert the number of moles to the number of molecules:

Number of molecules = number of moles × Avogadro's number

= 0.0134 mol × 6.022 × 10^23 molecules/mol

= 8.06 × 10^21 molecules

Therefore, there are 8.06 × 10^21 molecules of (NH4)3PO4 in a 2.00 g sample of it.

The comparison between the class barometer data and the air pressure shown in the weather report serves as a means to evaluate the accuracy and effectiveness of the barometer's measurements.

The comparison between the data from the class barometer and the air pressure shown in the weather report revealed a correlation between the two measurements. The class barometer readings were likely taken at the same time as the weather report's air pressure measurement to ensure accurate comparison.

If the class barometer readings closely matched the air pressure indicated in the weather report, it would suggest that the barometer was functioning correctly and providing reliable measurements. This would indicate that the class barometer could be used as a reliable tool for monitoring air pressure changes.

However, if there were significant discrepancies between the class barometer readings and the air pressure reported in the weather report, it could indicate a calibration issue with the barometer or potential inaccuracies in its measurements. In such a case, it would be necessary to investigate the reasons behind the discrepancies and determine the reliability of the class barometer for future use. It helps to determine the barometer's reliability as a tool for monitoring air pressure changes in the local environment.

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Answer:yes

Explanation:

this is because the distance doesnt matter

Answer:

Basically, the more hot the state is, the more kinetic energy it will have. This means that answer D. would be right, as it goes from coldest to hottest states!

Answer:

The answer is D. solid, liquid, gas, plasma

Explanation:

The minimum pressure of NO2 needed to reverse the tendency is equal to P/2, rounded to 2 significant digits.

Kc = {\(NO_2]\)2/ [\(N_2O_4\)]

Kc = [x]2 / [P]

x = √(Kc * P)

Plugging in Kc = [\(NO_2\)]2 / [\(N_2O_4\)] = (2x)² / P = 4x²/P, and solving for x:

x = √(Kc * P) = √(4x²) = 2x

Equilibrium refers to a state where the rates of the forward and reverse reactions are equal, resulting in no net change in the concentration of reactants or products. This state is also known as dynamic equilibrium because the forward and reverse reactions continue to occur, but at the same rate, maintaining a stable concentration of reactants and products.

Equilibrium is governed by the principle of Le Chatelier's principle, which states that if a system at equilibrium is disturbed by a change in temperature, pressure, or concentration, the system will respond in a way to counteract the disturbance and re-establish equilibrium. For example, if the concentration of reactants in a system is increased, the system will shift towards the product side to use up the excess reactants and restore equilibrium.

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Answer:

3.15*10 to the power of 24

Explanation:

Using the formula we get wavelength = velocity/frequency. substituting  the values gives us option B

Best describe table sugar is considered a pure substance is Sugar has the same chemical composition throughout

Table sugar is pure sucrose derived from sugar beet or sugar cane and sucrose is the disaccharide consisting of glucose and fructose and it is produced by green plant in the process of photosynthesis and since the chemical composition of sugar is definite and does not vary hence it is pure substance and table sugar refer to standard while white sugar that you see in your cooking baking or cup of tea at home and the scientific name foe table sugar is sucrose

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An oxidation number is a concept in chemistry that represents the hypothetical charge that an atom would have if all the bonds in a compound were purely ionic. It is used to keep track of electron transfer in chemical reactions and identify redox (reduction-oxidation) reactions.

In a redox reaction, there is a transfer of electrons from one reactant to another. The reactant that loses electrons is said to be oxidized, while the reactant that gains electrons is said to be reduced. The oxidation number of an atom helps determine whether it is undergoing oxidation or reduction.

The rules for assigning oxidation numbers are as follows:

In an elemental state, atoms have an oxidation number of zero.

For monatomic ions, the oxidation number is equal to the charge of the ion.

In compounds, some elements have commonly observed oxidation numbers. For example, oxygen is typically assigned an oxidation number of -2, and hydrogen is typically assigned an oxidation number of +1.

The sum of oxidation numbers in a neutral compound is zero, and in an ion, it is equal to the ion's charge.

By comparing the oxidation numbers of an element in a reactant and a product, one can determine if there has been an increase or decrease in the number of electrons associated with that element. This indicates whether oxidation or reduction has occurred.

However, it's important to note that except for ionic compounds, oxidation numbers do not have any physical significance. They are simply a tool to aid in understanding electron transfer in chemical reactions. In covalent compounds, where electrons are shared rather than transferred, oxidation numbers are hypothetical charges and do not reflect the actual charge or distribution of electrons.

In summary, oxidation numbers are used to identify redox reactions by tracking the transfer of electrons. They provide a convenient way to determine if an element has been oxidized or reduced. However, their significance is limited to ionic compounds, as they do not represent the true charge or electron distribution in covalent compounds.

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Under standard conditions (298 K and 1 atm), neither diamond nor graphite spontaneously converts to the other form. The conversion between diamond and graphite is a slow process that requires high temperature and pressure, and cannot occur spontaneously under standard conditions.

To reverse the spontaneity of the reaction, the temperature and/or pressure conditions can be changed. For example, if the temperature is increased to a sufficiently high value and the pressure is also increased, diamond can convert to graphite spontaneously. On the other hand, if the temperature is decreased to a low value and the pressure is also decreased, graphite can convert to diamond spontaneously.
The conversion between diamond and graphite is a type of phase transition, which involves a change in the arrangement of atoms in a material. In general, phase transitions occur when the energy of the system is lowered by changing the arrangement of its constituents. For diamond and graphite, the energy difference between the two forms is relatively small, which makes the conversion between them possible at high temperatures and pressures.
In summary, under standard conditions, neither diamond nor graphite spontaneously converts to the other form. To reverse the spontaneity of the reaction, the temperature and/or pressure conditions can be changed. The conversion between diamond and graphite is a type of phase transition that occurs when the energy of the system is lowered by changing the arrangement of its constituents.

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A compound is formed while atoms of or extra physical bond collectively chemically changes. For example, desk salt is a chemical compound that effects while atoms of Sodium (Na) bond with atoms of chlorine (Cl).

The residences of an detail do alternate while that detail combines with different factors to shape compounds. There are handiest 118 recognized factors which integrate to make the entirety withinside the universe. If you consider that, you will see that the residences of the detail have to alternate relying upon the compound it's far in.

For example, water is a compound crafted from the factors hydrogen and oxygen. Sugar is likewise a chemical compound which incorporates hydrogen and oxygen, in addition to carbon. The residences of the hydrogen atoms are one of a kind while they're a part of a sugar molecule than while they're a part of a water molecule.

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Answer:

Correlation means association - more precisely it is a measure of the extent to which two variables are related. There are three possible results of a correlational study: a positive correlation, a negative correlation, and no correlation.

Explanation:

PLS MARK BRAINLIEST

Answer:

a mutual relationship or connection between two or more things.

Explanation:

"research showed a clear correlation between recession and levels of property crime"