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the galvanometer is not measuring any electricity despite all wires being hooked up. Why could this be?

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

We have

\(density = \frac{65.54}{33.21} \\ = 1.973501957...\)

We have the final answer as

Hope this helps you

Answer:

1.1 mol of O2

Explanation:

First we need the balance chemical equation which is

2 H2O2 -------> 2 H2O + O2

This is important because in stoichiometry you can go from units of one thing to other by using mole ratios, here the mole ratio is 2 mol of H2O2  for one mole of O2.

\(2.2 mol H2O2 \frac{1mol O2}{2 mol H2O2}\) = 1.1 mol of O2

1) Noble gases. Elements in the periodic table are organized in groups. We can find the noble gases in the eighteenth group (column).

2) Zoom in to the right part of the periodic table.

We can see in this image that Krypton (Kr), Neon, and Argon ARE noble gases.

Iron is NOT a noble gas.

.

Answer:

Nuclear fission

Explanation:

Because the little particles are being spread out and the two elements are broken apart

Answer:

Explanation:

Now, you know that this solution has a molarity of 6.00 M, which basically means that every liter, which is the equivalent of 1000 mL, will contain 6.00 moles of ammonia. Since we've picked a sample of 1000 mL, you can say that it will contain 6.00 moles of ammonia. To convert this to grams, use the compound's molar mass

Answer:

Answer is: elements in the same group have similar chemical properties. Periodic law is the arrangement of the elements in order of increasing atomic number.

The mass of the glass is 1 gram.

What is specific heat capacity?

 This refers to the amount of heat in joules (J) absorbed per unit mass (kg) of the material when its temperature rises 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

From the question:

cp= 0.20 cal/(g°C)

T = 150°C

heat added = 30 cal

To find the mass of the glass, you can use the formula:

mass = heat added / (specific heat capacity x temperature change)

Substituting the given values:

mass =           30 cal

              (0.20 cal/(g°C) x 150°C)

mass =             30

                 (0.20 x 150)

mass       = 30

                  30

mass = 1 g

Hence, the mass of the glass is 1 gram.

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The correct answer is (D) All contain an equal number of atoms.

To determine which option contains the highest number of atoms, we need to consider Avogadro's number, which states that one mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

A) 1 mole of helium:

Helium has an atomic number of 2, meaning that each helium atom contains 2 protons.

Therefore, 1 mole of helium will contain 6.022 x 10^23 helium atoms.

B) 1 mole of carbon:

Carbon has an atomic number of 6.

Therefore, 1 mole of carbon will contain 6.022 x 10^23 carbon atoms.

C) 1 mole of uranium:

Uranium has an atomic number of 92.

Therefore, 1 mole of uranium will contain 6.022 x 10^23 uranium atoms.

Since all options represent 1 mole of the respective element, they will all contain the same number of atoms, which is equal to Avogadro's number.

Therefore, the correct answer is (D) All contain an equal number of atoms.

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Answer: Organic acids form when a carboxyl group (−COOH) is substituted for one of the hydrogen atoms in a hydrocarbon.

Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is

Answer: Don't know if this is right but try 102 g.

Explanation: I put this into acellus and it was correct so see if that works.

Yes, O2 and H2O have hydrogen bonding. Hydrogen bonding is a type of chemical bond that occurs when a hydrogen atom is covalently bonded to a highly electronegative atom, such as oxygen or nitrogen.

This creates a partial positive charge on the hydrogen atom and a partial negative charge on the other atom. Oxygen (O2) is a diatomic molecule, meaning it is made up of two oxygen atoms. In this case, it doesn't possess a hydrogen atom to form hydrogen bond with another molecule. In the case of water (H2O), hydrogen bonding does occur. The oxygen atom in water is highly electronegative, and it creates a partial negative charge on the oxygen atom. The two hydrogen atoms in water each have a partial positive charge, and they can form hydrogen bonds with other oxygen atoms in other water molecules. This is what gives water its unique properties such as high boiling point, high surface tension, and high heat of vaporization.

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Answer:

Subatomic particles

Explanation:

I hope it helped

An expression for the most probable speed of molecules of molar mass and temperature v² = 2kT/m.

Therefore, the most probable speed of molecules of molar mass and temperature t is given by vmp = (2kT/m)(1/2)

The most probable speed of molecules of molar mass and temperature t is determined by the Maxwell-Boltzmann distribution. The distribution is expressed by the following equation:

f(v) = 4π(v²) (m/2πkT)(3/2) exp(-mv²/2kT), where f(v) is the probability density function of the speed v, m is the molar mass of the gas, k is the Boltzmann constant, and T is the temperature.

To find the expression for the most probable speed, we differentiate f(v) with respect to v and set the result equal to zero:

df/dv = 8πv(m/2πkT)(3/2) exp(-mv²/2kT) - 4πv³(m/2πkT)(3/2) exp(-mv²/2kT) = 0.

Simplifying this expression, we get:v² = 2kT/m.

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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The theory of the atom is credited to John Dalton, an English chemist and meteorologist who lived in the late 18th and early 19th centuries.

He is considered the father of modern atomic theory. Dalton's work laid the foundation for our understanding of the atom and its role in chemical reactions. Dalton proposed that elements are composed of tiny, indivisible particles called atoms, which cannot be created or destroyed in chemical reactions. He also suggested that each element has a unique type of atom and that atoms of the same element are identical in size, mass, and other properties. He further proposed that chemical reactions occur when atoms combine or separate, and that the ratio of atoms in a compound is always the same.

Dalton's theory was based on his extensive studies of the properties of gases and his observations of chemical reactions. He was able to explain the law of multiple proportions, which states that the ratios of the masses of two elements that combine to form a compound are always in a simple whole number ratio.

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A) The volume of hydrogen container is the same as the volume of the oxygen container. This statement is false for the given gases are at the same temperature and pressure.

According to the ideal gas law PV = nRT, the volume of a gas sample is proportional to the number of moles of the gas present, assuming that the pressure and temperature are constant. Since the number of moles of hydrogen is much less than the number of moles of oxygen (0.50 grams of hydrogen is roughly equivalent to 0.01 moles while 8.0 grams of oxygen is roughly equivalent to 0.2 moles), the volume of the hydrogen container would be much smaller than the volume of the oxygen container.

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two flexible containers for gases are at the same temperature and pressure. one holds 0.50 grams of hydrogen and the other holds 8.0 grams of oxygen. which of the following statement regarding these gas samples is false?

A)the volume of hydrogen container is the same as the volume of the oxygen container

B) the number of molecules in the hydrogen container is the same as the number of molecules in the oxygen container

C) the density of hydrogen sample is less than that of oxygen sample

D) the average kinetic energy of the hydrogen molecules is the same as the average kinetic energy of the oxygen molecules

E) The average speed of hydrogen molecules is the same as the oxygen molecules

- In the reaction N₂(g) + 3H₂(g) → 2NH₃(g), the rate of disappearance of N₂ is 0.016 M/s, and the rate of disappearance of H₂ is 0.048 M/s.

- In the reaction CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g), the rate of appearance of CO₂ is 2.6 M/s, and the rate of appearance of H₂O is 5.2 M/s.

To determine the rate of disappearance or appearance of reactants or products in a chemical reaction, we can use the stoichiometric coefficients from the balanced equation. Let's analyze the given reactions:

1. N₂(g) + 3H₂(g) → 2NH₃(g)

The stoichiometric coefficients in this equation tell us that for every 1 mole of N₂ that reacts, 2 moles of NH₃ are produced. Therefore, the rate of disappearance of N₂ is equal to half the rate of appearance of NH₃, as it is consumed at half the rate. Since the reaction rate of NH₃ is given as 0.032 M/s, the rate of disappearance of N₂ would be:

Rate of disappearance of N₂ = 0.032 M/s ÷ 2 = 0.016 M/s

Similarly, for every 1 mole of N₂ that reacts, 3 moles of H₂ are consumed. Therefore, the rate of disappearance of H₂ is three times the rate of disappearance of N₂. Thus, the rate of disappearance of H₂ would be:

Rate of disappearance of H₂ = 0.016 M/s × 3 = 0.048 M/s

2. CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

The stoichiometric coefficients in this equation tell us that for every 1 mole of CH₄ that reacts, 1 mole of CO₂ is produced. Therefore, the rate of appearance of CO₂ is equal to the rate of disappearance of CH₄. Since the reaction rate of CH₄ is given as 2.6 M/s, the rate of appearance of CO₂ would also be:

Rate of appearance of CO₂ = 2.6 M/s

Furthermore, for every 1 mole of CH₄ that reacts, 2 moles of H₂O are produced. Therefore, the rate of appearance of H₂O is twice the rate of disappearance of CH₄. Thus, the rate of appearance of H₂O would be:

Rate of appearance of H₂O = 2.6 M/s × 2 = 5.2 M/s

These rates are determined based on the stoichiometric relationships between reactants and products in each equation.

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Solution used to white wash the walls is Quick lime(CaO) and when it is mixed with slaked lime [Ca(OH)2]. When this paste is used for white washing it combines with atmospheric CO2 to form calcium carbonate (CaCO3) which gives it a shiny texture.

To determine the amount of water and methane needed, we can set up a system of equations based on the desired composition of the mixture. you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

Let's assume x represents the number of gallons of water and y represents the number of gallons of methane. We have the following information: The total volume of the mixture is 90 gallons: x + y = 90. The mixture should be 60% methane: (y / (x + y)) * 100 = 60. Simplifying the second equation: y / (x + y) = 0.6. Now we can solve the system of equations: From equation 1, we can express x in terms of y: x = 90 - y. Substituting this into equation 2: y / ((90 - y) + y) = 0.6. Simplifying further: y / 90 = 0.6. Solving for y: y = 0.6 * 90. y = 54. Now we can find x using equation 1: x = 90 - y. x = 90 - 54. x = 36. Therefore, you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

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Water is absorbed in the intestine through the process of osmosis. Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration through a semi-permeable membrane.

In the intestine, the semi-permeable membrane is the cell wall of the intestinal epithelium.

As water moves into the intestine, it dilutes the concentration of solutes such as glucose and electrolytes, creating an osmotic gradient. This gradient drives the movement of water into the bloodstream, where it is distributed throughout the body and helps to maintain fluid balance.

In addition to osmosis, active transport mechanisms, such as sodium-glucose cotransporters, also play a role in absorbing water and electrolytes from the intestine. These transporters actively transport solutes and water across the cell membrane and into the bloodstream, further contributing to the regulation of fluid balance in the body.

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Answer:

See explanation

Explanation:

A dipole refers to a bond in which its two ends have opposite charges. A dipole results from a large difference in electronegativity between two atoms in a bond.

For instance, consider the bond between hydrogen and chlorine in HCl. The electronegativity of hydrogen is 2.2 while that of chlorine is 3.16. The significant electronegativity difference between the two atoms leads to a charge separation.

A partial positive charge appears on the atom that is less electronegative (hydrogen) while a negative charge appears on the more electronegative atom (chlorine).

This charge separation occurs because the shared electrons of the bond are more closely attracted to chlorine making it partially negative compared to hydrogen. A dipole moment now exists in the H-Cl bond hence the molecule is said to have a dipole.

Answer:

A. The atomic radius increases (in a group) with the increasing atomic number. This is because atomic size generally increases from top to bottom within a group because the greater the number of protons means the greater amount of electrons. The amount of electrons in orbitals determine an atom's size/radius.

B. Since Group 1A (Alkali Metals) are metals, they tend to form cations. Cations are always smaller than their original atom because the greater positive charge from the nucleus closes in the space between it and the electrons, thus "shrinking" its size. This is why the ionic radii are smaller than the atomic radii of the same element.

I hoped this helped <3

Explanation:

Answer: Your answer is D. Energy is absorbed.

Hope this helps!

Answer:

Energy is absorbed

Explanation:

For sublimation ....let's look at ice as an example

 you must add calories (heat ) to melt the ice and then heat to produce water vapor  .... sublimation requires energy input

The new volume of the balloon will be determined by the Ideal Gas Law.

The Ideal Gas Law is a mathematical equation used to describe the behavior of an ideal gas under a given set of conditions. It states that, at a constant temperature and pressure, the pressure, volume and amount of gas present are all directly proportional.

This law states that the product of the pressure, volume, and temperature of a gas is a constant.
Since the pressure of the balloon remains constant, the new volume is inversely proportional to the temperature.
Therefore, the new volume can be calculated by dividing the original volume (13.5 liters) by the ratio of the original temperature (248 K) to the new temperature (324 K),
which is 248/324 = 0.76.
The new volume of the balloon is then 13.5 liters / 0.76 = 17.76 liters.

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The volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.

Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.

In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.

According to the question,

The density of iron chloride solution = 1.118 g/mL.

The mass of iron chloride solution = 1.75 kg.= 1750 g.

The formula for calculating the density is as follows:

Volume = 1750 g/1.118g/mL = 1565.29 mL.

Therefore, the volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.

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Answer:

Option A

Explanation:

Leguminous plants like pulses etc. have root nodules comprising of rhizobacterium which live in a symbiotic relationship with the roots of the plant and in turn fix the nitrogen in the soil in the roots of the leguminous plants.

Hence, option A is correct