the carbon reactions can run on their own without the light reactions. T/F?

true 100% i just had a quiz on this.

If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

learn more about contaminated here

https://brainly.com/question/465199

#SPJ11

Answer:

B  29 protons, 27 electrons

Explanation:

The given specie is copper ion:

         Cu²⁺  

We are to find the number of protons and electrons it contains.

 The number of protons is the positively charged particles in the atom.

 Electrons are the negatively charged particles in the atom.

The number of protons is the same as the atomic number

Atomic number of copper  = 29

 Number of protons  = 29

 Now;

    Charge  = Number of protons  - Number of electrons

     2  = 29  - number of electrons

     -27  = - number of electrons

 Number of electrons  = 27

The cell potential is 0.94 V.

To find the cell potential of the given cell, we can use the standard reduction potentials from a table.

The half-reactions are:

\(Ag^+ + e^- → Ag E° = +0.80 V\)

\(Sn^2^+ + 2e^- → Sn E° = -0.14 V\)

The overall cell potential (Ecell) can be calculated as sown below.

Ecell = E°cathode - E°anode

Ecell = (+0.80 V) - (-0.14 V)

Ecell = +0.94 V

Therefore, the cell potential of the given cell is +0.94 V.

To learn about cell potential:

https://brainly.com/question/28455231

#SPJ4

Answer:

Nitrogen has an atomic number of 7 (Z=7) because it has 7 protons in its nucleus. Some nitrogen atoms have an atomic mass number of 15 (A=15). A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons

Answer:

Atomic number = Number of protons = Number of electrons

Atomic number = 7

Answer:

what if we didn't have gas

Explanation:

Answer:

best answer is D

Explanation:

if element has even number then protons and neutrons are same but if element has odd number then we should add 1 number in number of protons to know neutrons. but this rule is not work in 4 element that element are argon, nitrogen, hydrogen and one other

Answer:

Elements in group 17 form C. -1 ions

0.200 m solution of C6H12O6 will have the highest vapor pressure.

To determine which 0.200 m solution will have the highest vapor pressure, we need to consider the concept of "vapor pressure lowering" which is a result of a solute dissolving in a solvent. The solution with the lowest degree of vapor pressure lowering will have the highest vapor pressure.

Vapor pressure lowering is proportional to the mole fraction of solute particles. The more solute particles present, the lower the vapor pressure.

Here are the solutes and the number of ions they dissociate into:
A) LiCl -> Li+ + Cl- (2 ions)
B) AlCl3 -> Al3+ + 3Cl- (4 ions)
C) CaCl2 -> Ca2+ + 2Cl- (3 ions)
D) C6H12O6 -> (1 molecule, does not dissociate)
E) KCl -> K+ + Cl- (2 ions)

Since C6H12O6 does not dissociate into ions and remains as a single molecule, it contributes the least number of particles. Therefore, a 0.200 m solution of C6H12O6 will have the highest vapor pressure.

Learn more about Vapor Pressure https://brainly.com/question/30459262

#SPJ11

Answer:

X

Explanation:

because it is the greatest

A model can be used to visually represent the chemical reaction occurring at station 1, which can help to understand the reaction mechanism and the role of each reactant in the reaction.

A chemical reaction is a process in which one or more substances (known as reactants) are transformed into new substances (known as products) through the breaking and formation of chemical bonds.

A model can be used to represent a chemical reaction by showing the reactants and products involved and the changes that occur during the reaction. Specifically, for station 1, a model can illustrate the chemical reaction by depicting the reactants (such as hydrogen and oxygen) and the products (such as water) involved in the process.

One way to create a model of this chemical reaction is through a chemical equation, which uses chemical formulas to represent the reactants and products and shows the chemical changes that occur during the reaction. The chemical equation for the reaction at station 1 is:

2 H2 + O2 → 2 H2O

This equation shows that two molecules of hydrogen (H2) react with one molecule of oxygen (O2) to form two molecules of water (H2O). The coefficients in front of each molecule indicate the number of molecules of each substance involved in the reaction.

To know more about chemical reaction:

https://brainly.com/question/29039149

#SPJ1

Complete question:

Can you explain how a model can be used to illustrate the chemical reaction at station 1?

17.4 grams of Sodium

Na= 1 mole.

The volume percent concentration of ethanol in the solution is 20.0% when 25.0 ml of ethanol is added to 100.0 ml of water.

To find the volume percent concentration of the solution, you need to first calculate the total volume of the solution.
Total volume of solution = volume of ethanol + volume of water
Total volume of solution = 25.0 ml + 100.0 ml
Total volume of solution = 125.0 ml
Next, you need to calculate the volume percent concentration of the ethanol in the solution.
Volume percent concentration of ethanol = (volume of ethanol / total volume of solution) x 100%
Volume percent concentration of ethanol = (25.0 ml / 125.0 ml) x 100%
Volume percent concentration of ethanol = 20.0%
Therefore, the volume percent concentration of ethanol in the solution is 20.0%.

Learn more about concentration :

https://brainly.com/question/10725862

#SPJ11

The volume percent concentration of ethanol in the solution is 20.0% when 25.0 ml of ethanol is added to 100.0 ml of water.

To find the volume percent concentration of the solution, you need to first calculate the total volume of the solution.
Total volume of solution = volume of ethanol + volume of water
Total volume of solution = 25.0 ml + 100.0 ml
Total volume of solution = 125.0 ml
Next, you need to calculate the volume percent concentration of the ethanol in the solution.
Volume percent concentration of ethanol = (volume of ethanol / total volume of solution) x 100%
Volume percent concentration of ethanol = (25.0 ml / 125.0 ml) x 100%
Volume percent concentration of ethanol = 20.0%
Therefore, the volume percent concentration of ethanol in the solution is 20.0%.

Learn more about concentration :

https://brainly.com/question/10725862

#SPJ11

Explanation:

For one thing, Net volume = Final volume - Initial volume

The result of this calculation follows the rule of subtraction.

(For addition and subtraction problems, the answer should be rounded to the same number of decimal places as the measurement with the least number of decimal places.)

So, in case in point is:

Trial 2

Initial = 1.2 mL

Final = 2.45 mL

Net = 2.45 - 1.2 = 1.25 = 1.3 (follow the rule from above)

Please, take a look and apply the rule mentioned.

------

The average volume per drop is well done (3 significant figures)

------

Explanation and Answers:

If we compare the properties of the sample #4 with the sample #2 we will find that:

a) What two piece of evidence support her claim?:

- The color of sample #4 is silver, it is the same color as the color of aluminum.

- Sample #4 conducts the electricity, the same as aluminum.

b) What one piece of evidence refutes her claim?:

- The density of sample #4 is different from the density of aluminum.

c) Why does this evidence refute her claim?

Because the density is a property that is characteristic of each metal, if the sample #4 has a density different from aluminum it can't be aluminum.

The balanced chemical equation for the precipitation reaction that occurs when aqueous solutions of manganese(ii) chloride and potassium carbonate are combined is equals to the 2Cr³⁺ (aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s).

Balanced Chemical Equation : If the species present in the reactants side and the products side separated by a right arrow contains equal number of atoms of all the type is known as the balanced chemical equation. The precipitation reaction that occurs when aqueous solutions of chromium (III) bromide and potassium carbonate are combined. First, we will write the molecular chemical reaction:

CrBr₃ (aq) + K₂CO₃(aq) → Cr₂(CO₃)₃(s) + KBr(aq)

Balanced chemical equation :

2CrBr₃ (aq) + 3K₂CO₃(aq) → Cr₂(CO₃)₃(s) + 6KBr(aq)

Balanced ionic chemical equation :

2Cr³⁺ (aq) + 6 Br⁻(aq) + 6 K⁺(aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s) + 6K⁺(aq) + 6Br⁻(aq)

Net ionic equation:

2Cr³⁺ (aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s)

Hence, the required balanced equation is 2Cr³⁺ (aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s).

To learn more about balanced chemical equation, refer :

https://brainly.com/question/26694427

#SPJ4

Choice (c) Main-sequence stars represents stars of the largest radii.

Main-sequence stars, represented by choice (c), encompass a wide range of sizes and masses. Within the main sequence, stars with larger radii are generally associated with higher masses. As stars form and begin their main-sequence phase, they follow a relationship known as the mass-radius relation. According to this relation, higher-mass stars have larger radii.

Red dwarfs, mentioned in choice (a), are low-mass stars that have relatively small radii compared to other main-sequence stars. White dwarfs, mentioned in choice (b), are the remnants of low- to medium-mass stars that have exhausted their nuclear fuel. They are compact and have smaller radii.

Neutron stars, mentioned in choice (d), are extremely dense objects that form after a supernova explosion in high-mass stars. While neutron stars are incredibly compact, they are not representative of stars with the largest radii.

Therefore, among the given choices, main-sequence stars (choice c) represent stars of the largest radii due to the correlation between higher stellar mass and larger radius.

Learn more about stars

brainly.com/question/31987999

#SPJ11

The empirical formula of ethylene glycol is C2H6O2. This can be determined using the given information of the combustion reaction. Ethylene glycol is composed of carbon, hydrogen and oxygen. By calculating the molar ratios of the elements present in the products of the combustion reaction, we can find the molar ratios of the elements present in the reactants.

For carbon, the molar ratio in the products is 9.06/12 = 0.755. For hydrogen, the molar ratio in the products is 5.58/2 = 2.79. For oxygen, the molar ratio in the products is 18.12/16 = 1.13.
By dividing the molar ratios of the products by the lowest value, 0.755, we can get the ratios of the reactants:
Carbon = 1, Hydrogen = 3.71, Oxygen = 1.49
The empirical formula of ethylene glycol is therefore C2H6O2.

For such more questions on Ethylene glycol:

brainly.com/question/11994953

#SPJ11

Answer: 315 g

Explanation:

\(d=\frac{m}{v} \implies m=dv=(254 \text{ mL})(1.24 \text{ g/cm})=315 \text{ g (to 3 sf)}\)

In the given question, 314.96 g is the mass of 254 ml of the liquid that is used in lab and has density of 1.24 \(\rm g/cm^3\).

Mass is the amount of substance in a thing is determined by mass, which is a characteristic of matter. It is usually expressed in grams (g) or kilograms (kg).

To find the mass, we can use the formula:

mass = volume x density

where the volume is given as 254 mL and the density is given as1.24 \(\rm g/cm^3\)

Substituting the given values, we get:

mass = 1.24 g/cm³ \(\times\) 254 ml

Before we can calculate the mass, we need to convert milliliters (ml) to cubic centimeters (cm³), since the density is given in g/cm³. 1 ml is equivalent to 1 cm³, so:

mass = 1.24 g/cm³ \(\times\) 254 cm³

mass = 314.96 g

Therefore, the mass of 254 ml of the liquid is 314.96 g.

Learn more about mass here:

https://brainly.com/question/11954533

#SPJ4

Non-heme iron is found in some foods that provide all the amino acids humans require for the absorption of iron.

Amino acids are defined as the substances which are considered to be the monomers of proteins.Every amino acid has the same structure  which consists  of a central carbon  bonded to an amino group , carboxyl group and a hydrogen.

Each amino acid also has  an another atom or a group of atoms bonded to the alpha carbon which are also known as the R group or the variable group of the side chain.There are 20 common amino acids which are  present in natural proteins and each amino acid has the same backbone.

The sequence and number of amino acids determines protein's shape,size and also its function. Each amino acid is attached to the other by a covalent bond formed by a dehydration reaction.

Learn more about amino acids,here:

https://brainly.com/question/28409615

#SPJ6

The label WARNING on a chemical container most accurately signifies that the hazards associated with the chemical can cause serious injury.

This means that the chemical can cause harm to humans and may require immediate medical attention if it comes into contact with the skin, eyes, or if it is ingested or inhaled. The label serves as a warning to users to be cautious when handling or storing the chemical, and to take appropriate safety measures such as wearing protective gear and following proper disposal protocols. It is important to always read and understand the labels on chemical containers before using them to ensure the safety of yourself and those around you.

In conclusion, the label WARNING on a chemical container is a crucial indicator of potential harm and should be taken seriously to prevent accidents and injuries.

To know more about chemical visit:

https://brainly.com/question/29240183

#SPJ11

The label WARNING on a chemical container most accurately signifies that the hazards can cause serious injury. The answer is B.

What is the label warning?

The label WARNING is used to indicate that the hazards associated with the chemical can cause serious injury. This warning label is typically placed on containers containing chemicals that pose significant risks to human health or safety.

A WARNING label implies that the chemical has hazards that can potentially cause harm or injury if not handled, used, or stored properly. It serves as a cautionary measure to inform users about the potential risks associated with the chemical and emphasizes the need for caution and careful handling.

Thus, the answer is B.

To know more about hazards, refer here:
https://brainly.com/question/30665468
#SPJ4

Answer:

Explanation:

The moving part won't move on its own there's a force but the force isn't enough for something like a bike chain it need grease to move smoothly or else it will just be super stuck or slow.

Answer:

because grease produce more fiction which helps moving part of machine not get jamm while working

Answer:

An element that exhibits some properties of metals and some of non-metals is called

metalliods and sometimes sememetals

Answer:

Sn (Tin)

Explanation:

The heat that would be evolved by 433 moles of nitric acid is 23252.1 kJ of heat.

The heat of neutralization is the heat energy released or absorbed when an acid and a base react to form a neutralized solution, typically water and a salt. It is a measure of the energy change associated with the neutralization reaction.

We know that the reaction between nitric acid and sodium hydroxide is 1:1.

We know that;

1 mole of the nitric acid would evolve 53.7 kJ of heat

433 moles of the nitric acid would evolve 433 * 53.7/1

= 23252.1 kJ of heat

Learn more about neutralization:https://brainly.com/question/33425463

#SPJ1

Answer:

a weak acid consist of mostly non ionized acid molecule

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

Learn more about NaCl

https://brainly.com/question/32275922?

#SPJ11

Answer:

The diagram is incorrect because there is only a single type of particle at the center of the atom.

Explanation:

The small circle at the centre of the sphere which contains six light gray spheres and six dark gray spheres represents the nucleus of the atom which is found at the centre of the atom.

The nucleus contains only one type of particle which is the proton. Hence the representation of two particles at the centre of the circle makes the model incorrect.

Answer:

D-  The diagram is correct because all electrons can be accommodated in two electron clouds around the nucleus.

Explanation:

This is the correct answer because i just took the pre-quiz and tried B and A and they were both incorrect and C just doesnt make any sense so yeah hope it helped :)

Paint has a trait called transferability that makes it especially useful to forensic investigators.

A connection between individuals, locations, and/or things may be established through investigation of paint found at the scene of a crime. Comparing paint from the crime scene with a sample of paint that was acquired from a known source is typically how paint is examined.

Examination of Paint By comparing the questioned sample to the standard, paint analysis in forensic science aims to determine its point of origin. Any pre-existing sources at the crime scene, such tools, walls, glass and glass shards, etc., can be used to find the paint.

To know more about forensic investigators visit:-

https://brainly.com/question/1347938

#SPJ1