calcium (Ca) is in group 2 on the periodic table. what does this tell you about this element?
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100 mL are needed for 5 days treatment.

Tamiflu is prescribed as a 6.000 mg tablet, oral suspension of mg/mL. The medication is administered twice daily, at a dose of 60.00 mg.

As a result,

the total amount of tamiflu administered in a day is equal to 60.00 × 2 mg, which equals 120.00 mg.

Tamiflu dosage required in total for five days is five.

  =5× 120.00 mg

  = 600.00 mg

Considering that 1 mL contains 6,000 mg, 100 mL is required for 5 days.

Another option is 600.00 mg in (1 mL× 600.00 mg/6.000 mg).

= 100 mL are needed for 5 days treatment

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Answer:

A

Explanation:

If Hydrogen is H₂  There will be two silver

and is Carbon is C There will only be one gray

and if Oxygen is O₃ There will be three red

Answer:

(b). Mass and distance.

Explanation:

The gravitational force between two objects is given by Newton's law of universal gravitation. The formula is as follows :

\(F=G\dfrac{m_1m_2}{r^2}\)

Here,

G is universal gravitational constant

r is the distance between two objects

It is very clear that the gravitational force is directly proportional to the product of masses and inversely proportional to the square of the distance between them.

Hence, the two quantities are used to predict gravitational force according to Newton's law of universal gravitation are mass and distance.

Answer:mass and distance

Explanation:

it’s correct

Answer:

C H 3 C H C (C H 3) C H 2 C H 2 C H 2 C H 3

Explanation:

Answer:

methyl ethanoate

Explanation:

To name the compound given above, the following must be obtained:

1. Determine the functional group of the compound.

In this case, the functional group is R–COOR' where R and R' are alkyl groups. Thus, the compound is an ester.

2. Determine the longest chain before the functional group and the compound after the functional group.

In this case, the longest chain before the functional group is carbon 2 i.e ethane and the compound after the functional group is methyl.

3. Name the compound by naming the compound after the functional group first, followed by the compound before the functional group and ending it with –oate.

This is illustrated below:

After the functional group => methyl

Before the functional group => ethane

Name of the compound => methyl ethanoate

Answer:

With the use of same chemicals, same gas will be produced while the use of different chemicals, different gases will be produced.

Explanation:

The same gas was produced in each assignment if the same chemicals are mixed with each other while different gases were produced in each assignment when different chemicals are allowed to mix. If every time, same chemicals and same concentration of chemicals are mixed together, the result will be the same means production of same gas but if different chemicals are allowed to mix, then the product will be the production of different gases.

Based on valence bond theory, which statement best describes the electron geometry, bonding and hybridization of the central atom in carbon tetrachloride? The electron geometry of carbon in carbon tetrachloride is tetrahedral with a sp3 hybridization.

The bonding in carbon tetrachloride involves the overlap of the valence orbitals on the carbon atom with the valence orbitals on the four chlorine atoms. The hybridization of the carbon atom in carbon tetrachloride is sp3, meaning that the four valence orbitals on the carbon atom are mixed together to form four equivalent sp3 hybrid orbitals. These hybrid orbitals are used to form the four bonds with the chlorine atoms. Therefore, the statement "The electron geometry of carbon in carbon tetrachloride is tetrahedral with a sp3 hybridization" accurately describes the electron geometry, bonding, and hybridization of the central atom in carbon tetrachloride.

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The chemical formula C8H18 and the condensed structural formula CH3(CH2)6CH3, octane is both an alkane and a hydrocarbon. There are numerous structural isomers of octane, which vary in the number and placement of carbon chain branches.

2,2,4-trimethylpentane, also known as iso-octane, is one of these isomers and is used as one of the reference values on the octane rating scale.

In the beginning, the octane rating was calculated by combining fuels made entirely of regular heptane and iso-octane (2,2,4-trimethylpentane, a highly branched octane), and allocating anti-knock ratings of zero for regular heptane and one hundred for pure iso-octane.

This mixture's anti-knock rating would be equal to the iso-octane content's %. A lower or higher octane rating may result from different octane isomers.

Thus, The chemical formula C8H18 and the condensed structural formula CH3(CH2)6CH3, octane is both an alkane and a hydrocarbon. There are numerous structural isomers of octane, which vary in the number and placement of carbon chain branches.

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Explanation:

Force=mass *acceleration

F=300*5

f

F=1500N

Answer:

In this simulation, you will be able to “see” several different forms of energy and the changes(transfers) that can occur between them.You are also able to work with a system where you canmanipulate the energy input, observe the process of electrical energy generation and manipulatethe output.Click on the “Energy Systems” tab.We will do all of our work here. Be sure to clickthe “Energy Symbols” box so the different types of energy will be visible throughout the process

We have that for the Question "Which energy output objects work with the solar panels" it can be said that  the energy output object that works with the solar panels is the

From the question we are told

Which energy output objects work with the solar panels?

Generally

Inverter

A Inverter is a device used in a solar installation system,with its primary work being conversion from DC(Direct current) to AC(Alternating Current)

Therefore

the energy output object that works with the solar panels is the

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Answer:

The correct answer is (C)

Which is "1-fluorobutane"

Explanation:

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The name of the hydrocarbon CH3CH2CH2CH2F is 1-fluorobutane.

In naming organic hydrocarbons, we count the number of the parent chain family. Here, we have an alkane with 4 carbons, which means that the parent chain is a family of alkane. The fourth compound in the family of an alkane is butane.

Afterwards, we will determine if there is any substituent attached to any of the carbon atoms in the chain and rank them in a way such that we have the lowest possible number.

Here, the fluorine is attached to the first carbon atom. So, it becomes 1-fluorobutane.

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Answer:

Acanthite. MFCD00003406

Explanation:

The valence electrons are very effective in screening the core electrons from the full charge of the nucleus statements about effective nuclear charge is true

The attractive positive charge of nuclear protons acting on valence electrons is known as effective nuclear charge. Due to the shielding effect, the effective nuclear charge is always smaller than the total amount of protons in a nucleus. In comparison to all other periodic table trends, effective nuclear charge lags behind.

Although a fluorine atom's nucleus has a 9-volt charge Z, the core electrons—four from the 1s and 2s orbitals—and some of the 7 electrons in the 2p orbitals—screen the valence electrons noticeably. Therefore, the cation of sodium has the highest effective nuclear charge.

Effective nuclear charge lowers down a group and rises from left to right across a period in the periodic table.

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Answer:

Earlier today, my friend got a call from the company where she had recently applied for a job. They informed her that she had been selected for an interview, which was scheduled for later this week. She was overjoyed and relieved to hear the news, as she had been searching for a job for several months and this was one of the positions she was most excited about. The call was definitely the highlight of her day, and it put her in a great mood for the rest of the afternoon! :) She immediately called her parents and friends to share the good news and celebrate!!

Answer:

4.03 moles

Explanation:

We know that the molar mass of Carbon is 12.011, thus we can solve for moles by dividing the grams given by the molar mass.

48.4 g / 12.011 g = 4.03 moles

The compound CH₃OCHO is known as methyl glyoxal or pyruvaldehyde. Its molecular formula is C₃H₄O₂.

Methyl glyoxal or pyruvaldehyde is known to have a pungent odor. It has been described as having a sharp, acrid smell that is similar to that of formaldehyde or acrolein. The odor of pyruvaldehyde can be irritating to the eyes, nose, and throat, and it can cause respiratory problems if inhaled in large quantities. The odor of methyl glyoxal or pyruvaldehyde has been described in several chemical and safety databases.

One of the most important factors that predict a molecule's smell is the presence of functional groups, which are groups of atoms that impart characteristic chemical and physical properties to a molecule. The pungent odor of methyl glyoxal is thought to be associated with its carbonyl functional group (C=O), which is a common feature of many aldehydes and ketones. In the case of methyl glyoxal, the carbonyl group is located at the center of the molecule, and it is flanked by two methyl groups and a hydroxyl group, which likely contribute to the molecule's overall odor.

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Considering the definition of percentage by mass, 448 grams of a 12.5 % sugar solution contain 56.0 g of sugar

The percentage by mass expresses the concentration and is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.

The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage:

percent by mass= (mass of solute÷ mass of solution)×100%

In this case, you know:

Replacing in the definition of percent by mass:

12.5%= (56 g÷ mass of solution)×100%

Solving:

12.5%÷ 100%= 56 g÷ mass of solution

12.5%÷ 100%= 56 g÷ mass of solution

0.125= 56 g÷ mass of solution

0.125× mass of solution= 56 g

mass of solution= 56 g÷ 0.125

mass of solution= 448 g

Finally, the mass of solution is 448 grams.

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Step 1 - Discovering the ionic formula of Chromium (III) Carbonate

Chromium (III) Carbonate is formed by the ionic bonding between Chromium (III) (Cr(3+)) and Carbonate (CO3(2-)):

Step 2 - Finding the molar mass of the substance

To find the molar mass, we need to multiply the molar mass of each element by the number of times it appears in the formula of the substance and, finally, sum it all up.

The molar masses are 12 g/mol for C; 16 g/mol for O and 52 g/mol for Cr. We have thus:

The molar mass will be thus:

Step 3 - Finding the percent composition of carbon

As we saw in the previous step, the molar mass of Cr2(CO3)3 is 284 g/mol. From this molar mass, 36 g/mol come from C. We can set the following proportion:

The percent composition of Carbon is thus 12.7 %.

Answer:

The answer is D

Explanation:

Non metals are:

Hydrogen (H)

Sulphur (S)

Phosphorus (P)

Carbon (C)

Fluorine (F)

Oxygen (O)

Nitrogen (N)

Chlorine (Cl)

Bromine (Br)

Helium (He)

Argon (Ar)

Iodine (I)

Neon (Ne)

Krypton (Kr)

Radon (Rn)

Selenium (Se)

Xenon (Xe)

Answer:

The pH of the solution is 1.60.

Explanation:

1st) It is necessary to write and balance the chemical reaction:

Now we can see that 1 mole of NaOH reacts with 1 mole of HCl.

2nd) We have to calculate the moles contained in 15mL of 0.10M NaOH solution and the moles contained in 25mL of 0.10M HCl solution:

• Moles contained in NaOH solution:

• Moles contained in HCl solution:

Now we know that there are 1.5x10^-3 moles of NaOH and 2.5x10^-3 moles of HCl.

3rd) According to the stoichiometry of the reaction, 1 mole of NaOH reacts with 1 mole of HCl, so in this case, 1.5x10^-3 moles of NaOH will react with 1.5x10^-3 moles of HCl, because NaOH will be the limiting reactant and HCl will be the excess reactant.

So, now we have to calculate the excess of HCl:

2.5x10^-3moles - 1.5x10^-3moles = 1x10^-3moles

Now we know that there are 1x10^-3 moles of HCl left.

4th) Excess HCl will remain dissociated into H+ and Cl-, according to the following equation:

That means that for every mole of HCl, 1H+ dissociates. So, in this case, there are 1x10^-3 moles of H+.

Remember that these moles are contained in 40mL, so the molarity of H+ is 0.025M:

5th) Finally, we can calculate the pH of the solution, by replacing the H+ concentration in the pH formula:

So, the pH of the solution is 1.60.

The empirical mass of the compound, given that the molecular formula of the compound is N₂O₂, is 60 g/mol

First, we must understand here that empirical mass of a compound is simply the molar mass of the compound.

This means that if we obtain the molar mass of a compound, then we have equally obtain the empirical mass of the compound.

Now, we shall obtain the molar mass of the compound. Details below:

Molar mass of N₂O₂ = (14 × 2) + (16 × 2)

Molar mass of N₂O₂ = 28 + 32

Molar mass of N₂O₂ = 60 g/mol

From the above, the molar mass of the compound is 60 g/mol

Thus, we can conclude that the empirical mass of the compound is 60 g/mol

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The gas law that explains the phenomenon of a weather balloon increasing in volume when heated from room temperature (25 °C) to 58 °C is Charles' Law, also known as the law of volumes. option(d)

Charles' Law states that the volume of a given amount of gas is directly proportional to its temperature, assuming constant pressure and amount of gas. According to this law, when the temperature of a gas increases, its volume also increases, and vice versa, provided that other factors remain constant.

In the case of the weather balloon, as it is heated from room temperature (25 °C) to 58 °C, the temperature of the gas inside the balloon increases. According to Charles' Law, this increase in temperature causes the volume of the gas to expand or increase. This is because the gas particles gain kinetic energy with an increase in temperature, leading to more frequent and energetic collisions with the balloon's walls, which results in an expansion of the gas and an increase in volume.

On the other hand, Gay-Lussac's Law describes the relationship between the pressure and temperature of a gas, while Boyle's Law relates the pressure and volume of a gas. The Combined Gas Law combines the three gas laws (Boyle's Law, Charles' Law, and Gay-Lussac's Law) to describe the relationships between pressure, volume, and temperature for a given amount of gas.

Charles' Law explains the phenomenon of a weather balloon increasing in volume when heated, as it describes the direct relationship between the volume and temperature of a gas under constant pressure and amount. option(d)

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There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

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The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.