(01.07 LC)
Emma used an equal arm balance to weigh a 1.134 g sample of calcium carbonate. Which of these
measurements made by Emma is the most accurate? (5 points)
Select one:
O
a.1.1 g
b.1.2 g
c.1.3 g
d.1.4 g
(01.07 MC)
Look at the two thermometers.
D

Answer:

The Atomic Number

Explanation:

Answer:

\(M_{acid}=0.114M\)

Explanation:

Hello there!

In this case, according to the given information, it is possible for us to firstly write the chemical equation whereby sulfuric acid is titrated with sodium hydroxide:

\(H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O\)

Whereas the mole ratio of acid to base is 1:2 and therefore, the relationship between the volumes and molarities is:

\(2M_{acid}V_{acid}=M_{base}V_{base}\)

Thus, we solve for the required molar concentration of the acid as shown below:

\(M_{acid}=\frac{M_{base}V_{base}}{2V_{acid}} \\\\M_{acid}=\frac{0.100M*45.65mL}{2*20.00mL}\\\\M_{acid}=0.114M\)

Regards!

N₂0₄ is the formula represents the binary molecular compound dinitrogen tetroxide. Therefore, option B is correct.

Binary molecular compounds are made up of exactly two nonmetal elements. HF, NO2, and P2O5 are a few examples. It is extremely simple to name binary molecular compounds. The first element is given its element name, followed by ide; the second element is given its root (hydr, bor, carb, ox, fluor, etc.).

In N₂0₄ molecule there are two nitrogen atoms at the suffix so, it is binary and in oxygen atom its suffix is 4 so, it is tetroxide. Therefore, N₂0₄ is the formula represents the binary molecular compound dinitrogen tetroxide.

Thus, option B is correct.

To learn more about the binary molecular compound, follow the link;

https://brainly.com/question/7960132

#SPJ1

Answer:

\(E=2.06\times 10^{-19}\ J\)

Explanation:

Given that,

The wavelength of electromagnetic radiation is 963.5 nm.

We need to find the energy of a photon with this wavelength.

The formula used to find the energy of a photon is given by :

\(E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{963.5\times 10^{-9}}\\\\E=2.06\times 10^{-19}\ J\)

So, the energy of a photon is \(2.06\times 10^{-19}\ J\).

The concentration of the original sulfuric acid solution is 0.05398M

In order to determine the concentration of the original sulfuric acid solution, we use the volume of the standard sodium hydroxide solution used in the titration along with the concept of stoichiometry.

Let us check the number of moles of sodium hydroxide (NaOH) used in the titration,

Moles of NaOH = Molarity of NaOH x Volume of NaOH

=0.1463M x 18.47 mL

= 0.002699 Moles

As the balanced chemical equation between Sulfuric acid (\(H_SO_4\)) and sodium hydroxide is 1:2, then we can deduct that 1 mole of sulfuric acid can react with 2 moles of sodium hydroxide.

In that case, the number of moles of sulfuric acid in the 10.00 mL sample is;

Moles of \(H_2SO_4\) = 0.002699 Moles x (1/2)

= 0.0013495 Moles

Now we can calculate the concentration of the original sulfuric acid solution:

That is, the concentration of \(H_2SO_4\) = Moles of \(H_2SO_4\) / Volume of original acid solution

=0.0013495 Moles / 0.02500L

=0.05398 M

Therefore, the concentration of the original sulfuric acid solution is approximately 0.05398 M.

To learn more about sulfuric acid,

https://brainly.com/question/10220770

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. The volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. According to the balanced chemical equation, for every 2 moles of water (H2O) electrolyzed, 1 mole of oxygen gas (O2) is obtained. Since 1 mole of any gas occupies 22.4 L at standard temperature and pressure (STP), we can use the stoichiometry of the reaction to determine the volume of oxygen gas produced.

Given that 50 cm³ of gas is obtained at the anode, we need to convert this volume to liters:

50 cm³ = 50/1000 L = 0.05 L

Using the stoichiometric ratio of the balanced equation, we find that 2 moles of water produce 1 mole of oxygen gas. Therefore, 0.05 L of oxygen gas is equivalent to:

0.05 L × (1 mole/22.4 L) = 0.002232 moles

Thus, the volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

for such more questions on gas

https://brainly.com/question/24719118

#SPJ8

Answer:

The importance of learning is that it helps the individual to acquire the necessary skills through learning and knowledge so that he can achieve his set goals. An important fact about learning is that it is a means to improve knowledge and gain skills that will help in reaching specific goals

Explanation:

The importance of learning is that it helps the individual to acquire the necessary skills through learning and knowledge so that he can achieve his set goals. An important fact about learning is that it is a means to improve knowledge and gain skills that will help in reaching specific goals

Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

For more such questions on molecules

https://brainly.com/question/1351818

#SPJ8

The subshell with quantum numbers n=2 and l=2 is the 2D subshell.

The set of numbers used to describe the position and energy of the electron in an atom are called quantum numbers.

There are four known quantum numbers, and they include:

The  principal quantum number (n) indicates the energy level or shell of an electron, while the azimuthal quantum number (l) indicates the shape of the electron cloud or subshell.

Learn more about quantum number at: https://brainly.com/question/2292596

#SPJ1

Answer: A. They break down plant and animal remains and recycle the materials.

Explanation: Decomposers, such as bacteria, fungi, and certain insects, play a crucial role in the recycling of nutrients in an ecosystem.  When plants and animals die, decomposers break down their remains into simpler organic matter, such as carbon dioxide, water, and minerals.  This process is known as decomposition.

By breaking down organic matter, decomposers release nutrients back into the environment. These nutrients can then be absorbed by plants through their roots, allowing them to grow and thrive. In this way, decomposers contribute to the cycling of essential elements, such as carbon, nitrogen, and phosphorus, in the ecosystem.

Furthermore, decomposers help to maintain a healthy and balanced ecosystem by preventing the accumulation of dead organic matter.  If not decomposed, dead organisms would pile up, leading to the depletion of oxygen and the release of harmful substances.  

Learn more about the ecosystem here: https://brainly.com/question/34849448?.

Answer:

The answer is 12 cm^2

Explanation:

Two chiral C atoms make up L-ascorbic acid. In the image, they are indicated with an asterisk.

1st structure: Top chirality center:0

Other chirality center:0

2nd structure: Top chirality center: R

Other chirality center: S

What are chiral centers and chirality?

Chiral centre: A chiral centre is an atom that has four distinct groups linked to it in a way that prevents a superimposable mirror image.

Chirality: Chirality is the quality of objects that prevents them from being superimposed on their mirror images.

A set of hands is an illustration of chirality.

To learn more about chiral centers and chirality

https://brainly.com/question/28095208

#SPJ1

Netiquette is the acting or the behavior to communicate on the internet or online. Thus, option D is accurate.

The behavior or the manners of good conduct on the internet platforms and social media exhibited by a person is the online etiquette.

The word netiquette is a combination of the word internet and etiquette, which means the manner or conduct on online or internet platforms.

Therefore, option D. rules and manners to behave online is the correct meaning of netiquette.

Learn more about netiquette here:

https://brainly.com/question/20597858

#SPJ1

The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).

For more questions on empirical formula

https://brainly.com/question/13058832

#SPJ8

The correct question would be as

The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?

\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)

A major purchase refers to a high-cost item or service that is considered a significant investment for an individual or household, such as a car, home, or college education. Major purchases usually involve a large sum of money and require careful planning and consideration before a final decision is made.

Any item that a person or a household buys for their own use or consumption is called a consumer good. Durable and non-durable goods are two types of consumer goods that can be classified. Consumer goods are tangible items that people or households buy for their own use or consumption.

Learn more about major purchase, here:

https://brainly.com/question/29998590

#SPJ1

Your question is incomplete, most probably the complete question is:

The difference between Major purchase and Consumer good​?

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

Read more about pH

https://brainly.com/question/11300720

The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

Learn more about reactions:

https://brainly.com/question/25769000

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

for more such questions on symptom

https://brainly.com/question/21078887

#SPJ8

Here the substance is water. So, we need to know the value of specific heat capacity of water to solve this question.

The specific heat capacity of water is 4.18 J/g° C.

This is the heat required to increase the temperature by one degree Celsius. To increase the temperature by 20 degree C, the heat required will be 2 times of 4.18 J/g° C.

The heat required to raise the temperature of n grams of a substance by m0C will be,

Let us rewrite the equation as,

q = mc Δ t

Where q is the heat required, m is the mass of the substance, c is the specific heat capacity of the substance and Δ t is the temperature difference.

Given that,

m = 200g

Δ t = 55° C – 35° C = 20° C

c = 4.18 J/g° C

Let us substitute the values:

q = 200*4.18*20

Hence the heat required is 16720J.

Converting it to kJ, the heat required to raise the temperature of 200 grams of water from 55° C to 35° C is 167 KJ.

To learn more about Specific Heat,

https://brainly.com/question/29700572

#SPJ1

The number of food Calories (Cal) that are in the package of M&M's are

431000 Joules.

When we measure the temperature change of the calorimeter, we may use this equation to compute the heat released by a sample because the calorimeter is an instrument for which we are aware of (or can ascertain) its heat capacity.

When a liquid absorbs or loses energy, the temperature of the liquid varies.

In accordance with the formula

Q= mCΔT

m = 200g

ΔT = 550 - 35

ΔT = 515

C = 4.182 J/kg °C

Q is equal to 200 * 4182 * 515

Q = 430746 Joules.

Water has a 4,200 J/kg°C (joules per kilogram per degree Celsius) specific heat capacity. This indicates that 4,200 J are required to increase the temperature of 1 kilogram of water by 1°C.

To know more about Calorimeter, visit:

https://brainly.com/question/4802333

#SPJ1

Answer:

No

Explanation:

Henry’s law is a gas law which states that at the amount of gas that is dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid when the temperature is kept constant. The constant of proportionality for this relationship is called Henry’s law constant (usually denoted by ‘kH‘). The mathematical formula of Henry’s law is given by:

P ∝ C (or) P = kH.C

Where,‘

Limitations of Henry’s Law

As per the standard data, the heat evolved during one mole of calcium carbonate decomposes is 177.8 KJ. Thus 15 g or 0.15 moles of calcium carbonate when decomposed will produce 26.67 KJ of heat.

Reaction enthalpy of a substance is the heat evolved or absorbed during a reaction. Reaction enthalpy is negative for an exothermic reaction and positive for an endothermic reaction.

Molar mass of calcium carbonate = 100 g.

no.of moles in 15 g = 15 /100 = 0.15 moles.

One mole or 100 g of calcium carbonate decompose to evolve 177.8 KJ according to the scientific record.

Thus, heat evolved by the decomposition of 0.15 moles is 0.15 × 177.8 KJ = 26.67 KJ.

Hence, the heat evolved during the decomposition of 15 g of calcium carbonate is 26.67 KJ.

To find more on reaction enthalpy, refer here:

https://brainly.com/question/1657608

#SPJ1

The correct answer is  a sphybridisation in z coordinate.So to form sphybridisation we need a s orbital and a p orbital  .

In genomics, hybridization is the process by which two complementary single-stranded DNA or RNA molecules bond together to form a double-stranded molecule.The bonding is determined by the correct base pairing between the two single-stranded molecules. When one s and one p orbital in the same main shell of an atom combine to form two new equivalent orbitals, this is referred to as sphybridization.

The newly formed orbitals are known as sphybridized orbitals. It forms linear molecules with a 180° angle. Atomic orbitals include both s and p orbitals. These orbitals represent the most likely region in which we can find an electron of that atom. The primary distinction between s and p orbitals is that s orbitals are spherical in shape, whereas p orbitals are dumvell-shaped.So to form  sp hybridisation we need a s orbital and a  p orbital .

Learn more about hybridisation  here :-

https://brainly.com/question/14140731

#SPJ9

Explanation:

Carbon-14 has a half life of 5730 years, meaning that 5730 years after an organism dies, half of its carbon-14 atoms have decayed to nitrogen atoms. Similarly, 11460 years after an organism dies, only one quarter of its original carbon-14 atoms are still around.

Complete question is;

In an experiment to determine the density of a liquid, an error of no more than 5.0% permitted. The true value for this density is 1.4392 g/cm²

What are the maximum and minimum values which a student may obtain to fall within the acceptable range.

Answer:

Maximum = 1.5112

Minimum = 1.3672

Explanation:

We are told the true value for the density is 1.4392 g/cm².

We are also told that the error should be no more than 5%(0.05).

This means the acceptable range of values would be;

1.4392 ± 0.05(1.4392)

This gives;

1.4392 + 0.05(1.4392) = 1.5112

Or

1.4392 - 0.05(1.4392) = 1.3672

Thus,

Maximum = 1.5112

Minimum = 1.3672

For the question asked, the correct option is (D) i.e. 1.8 standard deviations higher in pH than the typical rainfall.

A z-score is a measure of how many standard deviations a particular data point lies from the mean of a normal distribution. If the pH of the rainwater after last week's storm has a z-score of 1.8, this means that the acidity of the rain was 1.8 standard deviations higher than the mean acidity of average rainfall. It is important to note that the pH scale is logarithmic, so a change of one unit in pH represents a ten-fold change in acidity. Therefore, a change of 1.8 units in pH represents a ten-fold change raised to the power of 1.8, which is a substantial increase in acidity.

To know more about pH please refer: https://brainly.com/question/29766400

#SPJ4

Hello, this is Bing. I can help you with your question. Based on the information I found on the web, **H2** can be broken down into its two atoms of hydrogen (H) by supplying enough energy to overcome the bond that holds them together⁴. This process is called **dissociation** and requires an energy equal to or greater than the **dissociation energy** of H2, which is about 436 kJ/mol⁴.

One way to break down H2 is by using **electricity** to split water (H2O) into hydrogen (H2) and oxygen (O2) through a process called **electrolysis**¹. In this process, water is decomposed into its elements by passing an electric current through it. The electric current is provided by a battery or another source of electricity and the water needs to have an **electrolyte**, such as salt or acid, added to it to make it conductive¹. Two electrodes, usually made of metal or other conductive material, are inserted into the water and connected to the battery. The electrode connected to the positive terminal of the battery is called the **anode** and the one connected to the negative terminal is called the **cathode**¹. When the electric current flows through the water, hydrogen gas bubbles form at the cathode and oxygen gas bubbles form at the anode¹. The overall chemical reaction for electrolysis of water is:

2 H2O → 2 H2 + O2

Another way to break down H2 is by using **heat** to cause a reaction between hydrogen and oxygen that produces water and releases a large amount of energy. This reaction is called **combustion** or **oxidation** and can be ignited by a spark or a flame³. The reaction is very fast and explosive and can be dangerous if not controlled. The overall chemical reaction for combustion of hydrogen is:

2 H2 + O2 → 2 H2O

I hope this helps you understand how H2 can be broken down and what methods are used to do so.

The expected lattice energies, in increasing order, are MgO> MgBr2> KBr.  

The ranking is related that the lattice energy being directly proportional to the strength of the ionic bond. If the bond is strong, the lattice energy would be high.

If the intermolecular force is strong, then the energy requires to break the bond would be greater. Thus, the lattice energy would be high.

MgO has the lowest lattice energy because it is the smallest and has the weakest attractive force between the ions. MgBr2 has a slightly higher lattice energy because the bromine ions are larger and have a stronger attractive force than the oxygen ions. KBr has the highest lattice energy because the potassium ions are larger than the bromine ions and have a stronger attractive force.

To know more about ionic bonds, click below:

https://brainly.com/question/2220825

#SPJ1