Elements that easily give up 1-3 electrons are called *
metals
Ononmetals
O noble
Ometalloids
noble gases

Answer:

Found this on Course Hero. Hope this helps?

Explanation:

Approximately 63.5% of the compound AgNO3 is made of silver.

The atomic mass of silver (Ag) is 107.87 g/mol, and the atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.

The molecular weight of AgNO3 is:

AgNO3 = (Ag atomic mass) + (N atomic mass) + (3 x O atomic mass)

AgNO3 = (107.87 g/mol) + (14.01 g/mol) + (3 x 16.00 g/mol)

AgNO3 = 169.87 g/mol

The percent by mass of silver in AgNO3 can be calculated as:

Percent by mass of silver = (Mass of silver / Total mass of AgNO3) x 100

Since there is only one silver atom in one AgNO3 molecule, the mass of silver in one mole of AgNO3 is equal to the atomic mass of silver, which is 107.87 g/mol.

Therefore, the percent by mass of silver in AgNO3 is:

Percent by mass of silver = (107.87 g/mol / 169.87 g/mol) x 100

Percent by mass of silver = 63.5%

For more question on compound click on

https://brainly.com/question/26388921

#SPJ11

The style of Vincent Van Gogh's Starry Night (1889) is Post-Impressionism.

Post-Impressionism is an art movement that developed in France in the late 19th century as a reaction against the limitations of Impressionism. It is characterized by a focus on subjective emotions and personal interpretations of the world, as well as an interest in the formal qualities of art, such as color, line, and form.

Van Gogh's work is known for its expressive use of color and texture, and Starry Night is a prime example of his Post-Impressionist style, with its swirling brushstrokes, intense colors, and dreamlike quality.

Learn more about post impressionism here:

https://brainly.com/question/2725280

#SPJ1

We need to fill the acetylene tank to a pressure of 44.29 atm to ensure that we run out of each gas at the same time.

To solve this problem, we need to apply the ideal gas law:

PV = nRT

Applying the ideal gas law for each tank,

PV = NkT

where N is the number of particles, k is Boltzmann's constant, and T is the temperature.

For oxygen:

(155 atm) * (7.00 L)

= N1 * k * T

For acetylene:

(P2) * (2.00 L)

= N2 * k * T

To use up both gases at the same time, we need to use the same number of moles of each gas. So we can set N1 equal to N2:

N1 = N2

Combining the two equations above to solve for P2:

(155 atm) * (7.00 L) = (N1) * k * T

(P2) * (2.00 L) = (N1) * k * T

Dividing the second equation by the first,

P2/P1 = (2.00 L)/(7.00 L)

P2 = (2.00 L)/(7.00 L) * (155 atm)

P2 = 44.29 atm

Learn more on the ideal gas law here https://brainly.com/question/12873752

#SPJ1

The correct statement about cytokinesis is that a cell plate forms in plant cells. Option C is correct.

During cytokinesis, the cytoplasm of the parent cell divides into two daughter cells, each with its own nucleus and organelles. In animal cells, a contractile ring made of actin and myosin filaments forms around the cell's equator and contracts, pinching the cell in two.

In contrast, plant cells build a cell plate, which forms from vesicles produced by the Golgi apparatus, at the cell's equator. These vesicles fuse together and form a new cell wall to separate the two daughter cells. The other three options mentioned in the question are related to mitosis, which is the division of the nucleus, whereas cytokinesis is the division of the cytoplasm. Option C is correct.

To know more about the Cytokinesis, here

https://brainly.com/question/18477575

#SPJ1

The variable that determines which "R" value to use in a calculation is pressure (P). The ideal gas law equation, PV = nRT, includes the universal gas constant (R), which has different values depending on the units used for pressure. If pressure is measured in atmospheres (atm), the value of R is 0.08206 L·atm/mol·K. If pressure is measured in pascals (Pa), the value of R is 8.314 J/mol·K. Similarly, if pressure is measured in other units such as torr, bar, or psi, a different value of R should be used. Therefore, the choice of "R" value to use in a calculation depends on the units of pressure being used in the problem.

Answer:C. pressure (P)

Explanation:

The half-life of a first-order reaction is given by the following equation:

t(1/2) = ln(2)/k

where t(1/2) is the half-life and k is the rate constant.

From the given information, we know that the partial pressure of FC1O2(g) falls from 0.080 atm to 0.010 atm over 48 minutes. We can use this information to calculate the rate constant as follows:

ln([FC1O2]t/[FC1O2]0) = -kt

where [FC1O2]t is the concentration (in atm) at time t, [FC1O2]0 is the initial concentration (in atm), and k is the rate constant.

Substituting the given values, we get:

ln(0.010/0.080) = -k(48)

Solving for k, we get:

k = 0.1225 min^-1

Now, we can use the equation for the half-life to calculate the answer:

t(1/2) = ln(2)/k

t(1/2) = ln(2)/0.1225

t(1/2) = 5.66 min (rounded to two significant figures)

Therefore, the half-life of the decomposition reaction is 5.66 minutes.

Answer:

Because their fur doesn't provide much insulation from the cold, opossums typically spend the winter in dens that are dry, sheltered and safe.

Explanation:

Answer:

It finds a den or nest that is open

Explanation:

The buffer solution has a pH of 5.36.

To find the pH of this buffer solution, use the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻]/[HA])

where pKa = dissociation constant of acetic acid, [A⁻] = concentration of acetate ions, and [HA] = concentration of acetic acid.

Calculate the concentrations of acetate ions and acetic acid in the solution.

The initial moles of acetic acid are:

moles of acetic acid = volume of acetic acid x concentration of acetic acid

moles of acetic acid = 0.020 L x 0.10 mol/L

moles of acetic acid = 0.002 mol

After mixing with sodium acetate, the total volume of the solution is 50 mL, so the concentration of acetic acid and acetate ions are:

[HA] = moles of acetic acid / total volume of solution

[HA] = 0.002 mol / 0.050 L

[HA] = 0.040 M

[A⁻] = concentration of sodium acetate

[A⁻] = 0.10 M

The dissociation constant of acetic acid is pKa = 4.76.

Now, substitute these values into the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻]/[HA])

pH = 4.76 + log(0.10/0.040)

pH = 4.76 + 0.60

pH = 5.36

Therefore, the pH of the buffer solution is 5.36.

Find out more on pH here: https://brainly.com/question/26424076

#SPJ1

Answer:

1. Organized information: Mendeleev's periodic law helped organize the then-disparate information about elements into a system that made sense. This made it easier for chemists to understand the nature of the elements and make predictions about their behavior.

The food caloric content of the candy bar is approximately 167 Cal/g.

The first step is to calculate the heat released by the candy bar, which is equal to the heat absorbed by the calorimeter:

q = m × C × ΔT

where q is the heat released by the candy bar, m is the mass of the candy bar, C is the heat capacity of the calorimeter, and ΔT is the temperature change of the calorimeter.

Plugging in the given values, we get:

q = (23.3 g) × (8.72 kcal/°C) × (15.5 °C) = 3,884.6 cal

Next, we need to convert the heat released to nutritional calories per gram:

Cal/g = q/m

Cal/g = 3,884.6 cal / 23.3 g = 166.6 Cal/g ≈ 167 Cal/g (to three significant figures)

As a result, the candy bar's food caloric value is roughly 167 Cal/g.

To know more about the Calorimeter, here

https://brainly.com/question/6455128

#SPJ1

Answer:

when placed in water, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. chemical change = fire is a sign of chemical reaction.

Explanation:

When placed in water the sodium pellets catch the fire and liberate the hydrogen gas. On mixing with water solid sodium forms a colorless basic solution.

Sodium is a soft metal. It is a very reactive element with a low melting point. Sodium reacts very quickly with water, snow, and ice to produce sodium hydroxide and hydrogen. It is an alkali metal and the sixth most abundant metal on earth. It has a silvery white color.

It has a strong metallic luster. On reacting with oxygen it produces sodium oxide which on reacting with the water produces sodium hydroxide.

It is used to improve the structure of certain alloys and soaps. It is also used in the purification of metals. Sodium is also present in sodium chloride, an important compound found in the environment.

To learn more about sodium, refer to the link:

https://brainly.com/question/29327783

#SPJ2

We would need to 1.39 L of the stock solution and then make up to the 2.54 L mark.

The dilution formula is used to calculate the new concentration of a solution after it has been diluted with a solvent. The formula is:

C1V1 = C2V2

where:

C1 = the initial concentration of the solution

V1 = the initial volume of the solution

C2 = the final concentration of the solution

V2 = the final volume of the solution

By the use of the formula;

C1V1 = C2V2

V1 = C2V2/C1

V1 = 2.54 * 6/11

V1 = 1.39 L

Learn more about dilution formula:https://brainly.com/question/30781795

#SPJ1

What would be the same  about the scientist's model probe and the eventual full-scale version of the probe is that; . They would be the same size. Option A

It is likely that the scientist's model probe would be built to replicate the size and proportions of the full-scale version because this would be vital in determining if the full-scale probe could endure the punishing conditions of Jupiter's atmosphere. The dimensions of the model probe and the real probe would therefore likely be the same.

However, it's likely that the model probe's parts weren't exactly the same as those in the actual probe.

Learn more about Jupiter:https://brainly.com/question/1451854

#SPJ1

The exit gas stream average molecular weight is 28.97 g/mol, and there will be 3.0 kg of leftover Phenanthrene in the reactor.

The balanced combustion equation for Phenanthrene is:

C₁₄H₁₀ + 21O₂ → 14CO₂ + 5H₂O

From the equation, we can see that 21 moles of oxygen are needed to combust 1 mole of Phenanthrene. Thus, to burn 10 kg of Phenanthrene, we need:

and

However, the supplied air is 30% less than the requirement, which means only 70% of the required O₂ will be supplied. Therefore, the actual amount of O₂ supplied will be:

Assuming the air is mostly nitrogen, we can calculate the exit gas stream average molecular weight using the following formula:

where 0.79 and 0.21 are the mole fractions of nitrogen and oxygen in air, respectively, and 28.01 and 32 are the molecular weights of nitrogen and oxygen, respectively.

Finally, we can calculate the amount of leftover Phenanthrene in the reactor:

However, this amount is negligible due to the large scale of the reaction. Therefore, we can round it off to:

Leftover Phenanthrene = 3.0 kg

To learn more about average molecular weight, here

https://brainly.com/question/31476705

#SPJ1