Answer: False
Explanation:
There are no scientific proofs that an increase in co2 levels leads to an increase in the length of days, but there may be an explanation for how the appearance of the day matters to an individual as an increase in co2 concentration leads to an increase in the temperature of the earth (greenhouse effect) also its increases the temperature at the sunset and hence leads to a misunderstanding that the effect of sn is still there hence increasing the length of the day but this is clearly wrong and is reported by very few individuals, there is no direct relation of increase in co2 content and increase in day's length
An atom has a diameter of 3.50 Å and the nucleus of that atom has a diameter of 6.50×10−5 Å . Determine the fraction of the volume of the atom that is taken up by the nucleus. Assume the atom and the nucleus are a sphere.
fraction of atomic volume:
1.43236148
×10
−14
Calculate the density of a proton, given that the mass of a proton is 1.0073 amu and the diameter of a proton is 1.73×10−15 m .
density:
g/cm 3
A proton's density is equal to 3.962 E14 g/cm3, given that it has a mass of 1.0073 amu and a diameter of 1.73 1015 m.
What do protons go by?Although protons were once thought to be elementary particles, the Standard Model of particle physics now recognises them as composite particles that comprise three valence quarks. Protons and neutrons are collectively referred to as hadrons.
Proton mass = 1.0073 amu, amu = 1.66054 E-24 g, and g proton = (1.0073 amu)(1.06654 E-24 g/amu = 1.074 E-24 g.
V = 4/3πr³\s∴ For example, r = D/2 ≈ 1.73 E-15 m)/2 = 8.65 E-16 m, where V = (4/3) (8.65 E-16 m) 3 = (1.074 E-24 g)/(2.711 E-39 cm3) = 3.962 E14 g/cm3
What is an example of a proton?Protons include the H+ ion or the hydrogen atom's nucleus. Regardless of the isotope, each hydrogen atom has one proton, each helium atom has two, each lithium atom has three, and so on.
To know more about proton visit:
https://brainly.com/question/1252435
#SPJ1
At what temperature does Benzene boil when the external pressure is 440 torr
The boiling point of benzene when the external pressure is 440 torr is 80.1 °C (176.2 °F).
What is benzene?
Benzene is an organic compound composed of six carbon atoms in a ring structure, with one hydrogen atom attached to each carbon atom. It is a highly flammable, colorless liquid with a sweet smell. Benzene is a natural component of crude oil and is one of the most important organic chemicals used in industry. It is used in the production of plastics, resins, synthetic fibers, rubber, pesticides, detergents, drugs, and dyes. It is also used as a solvent for fats, oils, waxes, resins, and inks. Benzene is classified as a carcinogen and its exposure can cause a variety of adverse health effects, including acute myelogenous leukemia, lymphomas, and other forms of cancer.
To learn more about benzene
https://brainly.com/question/17211567
#SPJ1
This compound gives off some gold sparks in a flame test. With Sodium Hydroxide or Ammonia, an orange brown precipitate forms. If NaOH and aluminum are added and the compound is warmed, red litmus paper will turn blue and an odor will be produced. Determine the name and formula of this compound.
Iron hydroxide is the compound that gives off some gold sparks in a flame test and the chemical formula of the compound is Fe(OH)₃.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
Learn more about compounds,here:
https://brainly.com/question/13516179
#SPJ1
Glucose (C6H12O6) is burned in the human body for energy. Carbon dioxide and water are produced as waste products. How many moles of oxygen are needed to combust 3.12 moles of glucose?
18.72 moles of oxygen are needed to combust 3.12 moles of glucose.
Glucose is a type of sugar that can be represented by the chemical formula C6H12O6.
When glucose is burned in the human body, it combines with oxygen to form carbon dioxide (CO2) and water (H2O) as waste products.
The balanced equation for the combustion of glucose is:
C6H12O6 + 6O2 -> 6CO2 + 6H2O
From the equation, we can see that for every 1 mole of glucose, 6 moles of oxygen are needed.
To calculate the number of moles of oxygen needed to combust 3.12 moles of glucose, we can use this relationship;-
3.12 moles of glucose * 6 moles of O2/1 mole of glucose = 18.72 moles of O2
So, 18.72 moles of oxygen are needed to combust 3.12 moles of glucose.
What causes pressure inside a bicycle tire?
A. The air particles pushing on the tire as they expand
B. The collisions of the air particles with one another
C. The collisions of the air particles with the surface of the tire
D. The air particles vibrating near the surface of the tire
Answer:
A. The air particles pushing on the tire as they expand
Explanation:
Answer: A is the right answer
Explanation:
The air pressure inside a bicycle tire is caused by the weight of the air molecules pressing down on the surface of the tire. This is why you can sometimes hear a hissing sound when you first get a flat tire – it’s because the air is escaping from the tire and equalizing the pressure inside and outside of the tire.
Q₁ differenciate using suitable examples between atomic number It's atomic mass of an element
Answer:
A measure of an element's identity is determined by its atomic number, and its weight is determined by its atomic mass.
Explanation:
The amount of protons in the nucleus of an element's atom is known as the element's atomic number. It serves to identify and categorize the elements in the periodic table and is particular to each element. The chemical characteristics of an element are determined by its atomic number.
An element's atomic mass is its average atom's mass, which is typically expressed in atomic mass units (amu). It is the total number of protons and neutrons in the nucleus of an atom. The atomic mass can be a decimal and is not always a number.
A measure of an element's identity is determined by its atomic number, and its weight is determined by its atomic mass.
Here is a list of synonyms for the two meanings of the word initiate. Think about what each word
means and decide where it belongs in the graphic organizer below.
admit
begin
commence
create
pledge
recruit
launch
welcome
► Now write these synonyms for initiate under the correct definition in the graphic organizer.
1. To put into effect; to bring into use.
2. To take in as a member.
Answer:
"Initiate"
1. To put into effect; bring into use.
• begin
• commence
• create
• launch
2. To take in as a member.
• admit
• pledge
• recruit
• welcome
Which of the following is the balanced chemical equation for the combination reaction between lithium metal and oxygen gas?
a) 4 Li(s)+O2(g) → 2 Li2O(s)
b) Li(s)+O(g) → LiO(s)
c) 2 Li(s)+O2(g) → 2 LiO(s)
d) Li(s)+O2(g) → LiO2(s)
Answer:
Explanation:
a
Order from Weakest attraction to strongest attraction
YC13
SrCl2
RbCl
Order from the weakest attraction to the strongest attraction is SrCl₂ > RbCl > YCl₃.
Which type of attraction is the weakest ?The London dispersion forces are the least powerful intermolecular forces. London's dispersion forces are also referred to as induced-dipole-induced-dipole because they are transiently attractive forces that cause temporary dipoles to form.
The non-polar, monatomic gas exhibits London dispersion.Ionic bonds > Hydrogen bonding > Van der Waals dipole-dipole interactions > Van der Waals dispersion forces.
The attraction of hydrogen bond is strongest, because they have permanent dipole-dipole forces, Van der Waal's forces is the weakest bond of attraction.
Thus, the order from the weakest attraction to the strongest attraction is SrCl₂ > RbCl > YCl₃.
To learn more about attraction force, follow the link;
https://brainly.com/question/20873733
#SPJ1
A sample of gold required 3.25 x 104 J of heat to melt it from
room temperature, 23.2°C, to its melting point, 1064.4°C. How
many pounds of gold were in the sample?
According to the question, 0.55 lb many pounds of gold were in the sample of heat to melt it from room temperature.
What is heat?
Heat is the transfer of energy from one object to another due to the temperature difference between them. Heat is the form of energy that is transferred between two objects with different temperatures. Heat moves from the object with the higher temperature to the object with the lower temperature. Heat is also created when an object does work, such as friction or compression. Heat transfer can happen through conduction, convection, and radiation. Conduction occurs when two objects of different temperatures are in direct contact with each other.
The specific heat of gold is 0.128 J/g°C.
3.25 x 104 J = (3.25 x 104 J) / (0.128 J/g°C x 841.2°C)
= 2.5 x 103 g
2.5 x 103 g = (2.5 x 103 g) / (453.6 g/lb)
= 0.55 lb of gold
To learn more about heat
https://brainly.com/question/25603269
#SPJ1
Nitrogen gas reacts with hydrogen gas to produce ammonia according to the following equation: N2(g)+3H2–>2NH3(g)
What is the mass of ammonia produced from 6.5 grams of hydrogen reactant, assuming there is a sufficient nitrogen to react? Give an explanation
a. 4 g NH3
b. 8 g NH3
c. 37 g NH3
d. 55 g NH3
As per the balanced reaction, 3 moles or 6 g of hydrogen gas produces 2 moles or 34 g of ammonia. Then, 6.5 g of hydrogen produces 36.8 g of ammonia.
What is ammonia ?Ammonia is a covalent compound formed from the nitrogen atom and three hydrogen atoms. The process of manufacturing of ammonia is called Haber process.
As per the balanced reaction, 3 moles or 6 g of hydrogen gas produces 2 moles or 34 g of ammonia. Then, 6.5 g of hydrogen produces 36.8 g of ammonia.
The mass of ammonia produced from 6.5 g of hydrogen is calculated as follows:
mass of ammonia = (6.5 × 34 g) / 6 g = 36.8 g
Therefore, the mass of ammonia produced from 6.5 g of hydrogen gas is 36.8 g.
Find more on ammonia:
https://brainly.com/question/15409518
#SPJ1
Write a scientific explanation that describes if we should use synthetic materials or only natural materials.
please help by the end of the night
We should be using natural materials because they are safer for our environment.
Why natural materials are preferableClaims: We should be using natural materials as opposed to synthetic materials. This is because natural materials are organic and 100% biodegradable. Synthetic materials, on the other hand, are not all naturally biodegradable. Many of them persist in the environment and hurt the environment and living organisms in the process.
Evidence: Most nylons and plastics are good examples of synthetic materials. Both are not biodegradable and persist in the environment. Our oceans are filled with nondegradable plastics. This plastic pollution is a threat to water transportation, aquatic biodiversity and food sustainability of humans.
Reasoning: Most synthetic materials affect the environment and we humans as compared to natural materials who are easily removed from the environment. Thus, our preference should be natural materials.
More on degradable and nondegradable materials can be found here: https://brainly.com/question/24232690
#SPJ1
What is the formula for photosynthesis and cellular ?
Answer:
Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O.
Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.
Explanation:
:)
Mg(s) + Ni2+(ag) -> Mg2+ (aq) + Ni(s) What is the total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag)? * 10 ( 1.0 mol ,20 mol ,3.0 mol, 4.0 mol
The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.
How to find the number of moles?This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).
In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).
Learn more about moles of electrons in brainly.com/question/512038
#SPJ1
The electrons that are gained by the [tex]Ni^{2+}[/tex] ion is 2.0 moles of electrons.
What is the number of the electrons gained?We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.
In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.
Learn more about redox reaction:https://brainly.com/question/13293425
#SPJ1
What is the thermal energy needed to completely vaporize 18.02 g of water at 100 degrees celsius?
The heat that we are going to need so as to be able to vaporize the water is 40.4 kJ.
What is the thermal energy?We know that the term thermal energy has to do with the energy that can be supplied to the water as heat when we raise the temperature of the water. In this case, we can see that we are dealing with the thermal energy needed to completely vaporize 18.02 g of water at 100 degrees Celsius.
We know that the heat that is required can be obtained from the formula;
H = mL
m= mass of the water
L = latent heat of vaporization of water
H = 18.02 g * 2240 J/g
H = 40.4 kJ
Learn more about heat:https://brainly.com/question/9967928
#SPJ1
How many moles in 68 grams of so2? (Show work pls)
The number of mole in 68 grams of sulphur dioxide, SO₂ is 1.06 mole
How do I determine the number of mole of SO₂?The number of mole of a substance is defined by the following formula:
Mole = mass / molar mass
Using the above fromula, we can obtain the number of mole in 68 grams of sulphur dioxide, SO₂. This is shown below:
Mass of SO₂ = 68 grams Molar mass of sulphur = 32 g/mol Molar mass of O = 16 g/molMolar mass of SO₂ = 32 + (2 × 16) = 32 + 32 = 64 g/molNumber of mole of SO₂ =?Mole = mass / molar mass
Number of mole of SO₂ = 68 / 64
Number of mole of SO₂ = 1.06 mole
Thus, we can conclude that the number of mole is 1.06 mole
Learn more about mole:
https://brainly.com/question/13314627
#SPJ1
How to name ions from radicals
To name ions from radicals, first identify the charge of the ion by counting the number of protons and electrons.
What do you mean ions?
Ions are atoms or molecules that have gained or lost one or more electrons and thus have a net electric charge. They are formed when an atom gains or loses electrons in a chemical reaction. Examples of common ions include sodium (Na+), chloride (Cl-), calcium (Ca2+), and magnesium (Mg2+).
Then determine the name of the ion based on its charge. For example, if the ion has a positive charge, it is called a cation; if it has a negative charge, it is called an anion. Finally, name the ion using the element's name and its charge. For example, a radical with two protons and one electron would be a cation and would be named “Hydrogen ion”.
To know more about ions,
https://brainly.com/question/7222067
#SPJ1
Byron is a goal had always been to complete
Byron's goal had always been to compete in the Olympics as a runner. He had told all his family and friends, and he was dedicated to his dream: Byron's goal was to run in the Olympics.
What was the Olympics' primary objective?A four-year carnival of world sports is the Olympic Games. The ultimate objectives are to develop people through sport and promote peace in the globe. Winter Games and Summer Games are different events.Byron was an odd creature; because of his fatalistic outlook on life, he let fate govern him and therefore did whatever he pleased, regardless of what other people thought or said about him. He believed he could do whatever he wanted because he was one of the most famous and decadent poets of his day (he even had a pet bear at his university!).Every four years, the Olympic Games bring together athletes from throughout the world.To learn more about Byron's goal refer to:
https://brainly.com/question/13229160
#SPJ1
Solution A has a pH of 10 and solution B has a pH of 6. Solution A has _____ times less hydrogen ion compared with solution B.
Answer:
_4
Explanation:
according to how the ph scale is arranged ,you will notice that when tou move from ph 10 to ph 6 the form changes to negative and it will give the answer as _4
Step 7: Put the metal in the water and measure temperature changes (Copper)
Initial temperature of metal
=
°C
Initial temperature of water
=
C
Final temperature of both =
DONE
Below is a list of the temperature change solution.
Temperature Change: What Is It?The source of the temperature change is
Initial Temperature - Final Temperature
Temperature measurements
It is a gauge for determining how hot or chilly a body is.
To quantify temperature variations,
The water and iron's beginning and final temperatures are noted.
To Iron
Iron that has been heated up is submerged in water.
Water is at a lower temperature, so both of the temperatures will change.
These information is saved.
Final temperature minus initial temperature equals temperature change.
a) The difference in temperature for metal is 200 - 100 = 100 0C
Water temperature change = 22.5
Change in temperature for both = 23.3
b) 0.7 for water
Metal 76.6 for iron
To learn more about temperature changes from given link
https://brainly.com/question/27740276
#SPJ1
Complete Question -
Put the Metal in the Water and Measure
Temperature Changes (Lead)
Measure the initial temperature of the water to the
nearest 0.1°C. Record in the data table.
Initial temperature of metal =
Initial temperature of water
Final temperature of both = [
27
DONE
26
25
24
23
Intro
Continue
AL
250 ml
=பா-©
200
150
100
1
27
O
°C
°C
Calculate to the correct number of significant figure (1.7x10^6)/(2.63x10^2) + 7.33 =
Answer: 64.7 [tex]*10^2[/tex]
Explanation:
Significant figures are the number of digits in a value that correlate with the accuracy of that value.
First lets solve the equation:
(1.7x10^6)/(2.63x10^2) + 7.33 = ?
(1,700,000)/(263) + 7.33
(6,463.8783) + 7.33 = 6,471.2083
We have to simplify the answer to the correct amount of significant digits.
6,471.2083 -> 64.7 [tex]*10^2[/tex]
What volume of O2 at 988 mmHg and 37 degrees C is required to synthesize 19.5
of NO?
Explanation:
The volume of O2 at 988 is 0.1634°C
1. The liquid solvent has a mass of 24.5 g
and a density of 0.865 g/mL.
Determine the mass of the solid given its density is 2.50 g/mL.
2. Convert 579
cm/s to units of meters per minute. Show the unit analysis by dragging the conversion factors into the unit‑factor slots.
3. A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 93.0 mL.
The liquid solvent has a mass of 24.5 g
and a density of 0.865 g/mL.
Determine the mass of the solid given its density is 2.50 g/mL.
4. Charlotte is driving at 61.4 mi/h
and receives a text message. She looks down at her phone and takes her eyes off the road for 4.16 s.
How far has Charlotte traveled in feet during this time?
5. A 13.01 g
sample of NaBr
contains 22.34% Na
by mass. How many grams of sodium does a 8.65 g
sample of sodium bromide contain?
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the volume of solid is 9.8L.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density of solid = Mass of solid ÷volume marked on the graduated cylinder
mass of solid =24.5 g
density of solid =2.50 g/mL
substituting all the given values in the above equation, we get
2.50 g/mL= 24.5 g/ volume of solid
volume of solid= 9.8L
Therefore, the volume of solid is 9.8L.
To know more about density, here:
https://brainly.com/question/16894337
#SPJ1
If 8.2 moles of Mg are burned, how many moles of O2 are consumed?
If 8.2 moles of Mg are burned, the number of moles of O₂ consumed is 4.1 moles.
How to calculate moles using stoichiometry?Stoichiometry refers to the quantitative relationship between the reactants and products of a specific reaction or equation.
According to this question, magnesium reacts with oxygen to produce magnesium oxide as follows:
2Mg + O₂ → 2MgO
Based on the above equation, 2 moles of magnesium reacts with 1 mole of oxygen gas
This means that 8.2 moles of magnesium will react with 8.2 × ½ = 4.1 moles of oxygen gas.
Learn more about stoichiometry at: https://brainly.com/question/9743981
#SPJ1
What is this called?
Answer:
2, 5 -dimethylheptane
Explanation:
Drawing the full structure would help you understand better
A 0.04373 g sample of gas occupies 10.0 mL at 291.0 K
and 1.10 atm. Upon further analysis, the compound is found to be 25.305% C
and 74.695% Cl.
What is the molecular formula of the compound?
The molecular formula of the compound is C₂Cl₂.
The empirical formula of a chemical compound is the smallest ratio of elements present in the compound. From the analysis
Percentage of C = %C = 25.305% Percentage of Cl = %Cl = 74.695% Atomic massCalculate the number of moles of the compound using the ideal gas equation P × V = n × R × T
n = number of moles (mol) T = temperature = 291.0 K R = gas constant = 0.0821 L atm /mol KP = pressure = 1.10 atmV = volume = 10.0 mL = (10.0 ÷ 1,000) L = 0.01 LP × V = n × R × T
1.10 × 0.01 = n × 0.0821 × 291.0
0.011 = n × 23.8911
n = 0.011 ÷ 23.8911
n = 4.6 × 10⁻⁴ mol
Calculate the molecular mass using Stoichiometry n = m ÷ M
m = mass = 0.04373 g M = molecular mass (g/mol)n = number of moles = 4.6 × 10⁻⁴ molM = m ÷ n
M = 0.04373 ÷ (4.6 × 10⁻⁴)
M = 95.0 g/mol
The molecular mass for the compound equals the molecular mass from the empirical formula times n.
M = M ((CCl)ₙ)
95.0 = (12 + 35.5) × n
95.0 = 47.5 × n
n = 95.0 ÷ 47.5
n = 2.1
n ≈ 2
The molecular formula times 2 from the empirical formula C₂Cl₂
Learn more about empirical formula here: https://brainly.com/question/11588623
#SPJ1
A compound melts at 20°C.
What kind of structure do you think it has?
The compound is non polar covalent in its structure as said above.
What is the melting point?Let us recall that the melting point has to do with the temperature at which there is the conversion of the solid to a liquid. We know that the melting point of the compound would depend on the structure of the compound.
If the compound would have a melting point that is about 20°C, the implication is that the compound is not be held by very strong intermolecular forces hence it must be covalent.
Learn more about melting point: https://brainly.com/question/29578567
#SPJ1
Which statement about the population shown in this graph is true?
There is nothing controlling population growth.
The population is not continuing to grow because it has reached its carrying capacity.
The number of individuals will continue to increase rapidly.
The number of individuals will decrease until there are none left.
The correct statement about the population shown in this graph is
The population is not continuing to grow because it has reached its carrying capacity.
What is population?Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world.
The carrying capacity of an environment is described as the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available.
The purpose of Carrying capacity is that it is a concept for biologists when trying to better understand biological populations and the factors that affect them.
Learn more about population at: https://brainly.com/question/25896797
#SPJ1
What is the mass of 5 moles of al2o3? (Show work please)
Answer: 509.8 g
Explanation:
5 moles Al₂O₃
Al: 2 x 26.98 g = 53.96 g
O: 3 x 16.00 g = 48.00 g
Total grams = 101.96 g
1 mole of Al₂O₃ = 101.96 g
5 mol Al₂O₃ x (101.96 g Al₂O₃/1 mol Al₂O₃) = 509.8 g Al₂O₃
Note that moles of Al₂O₃ cancel and you are left with grams, which is what you want.
Write the thermochemical equation of the reaction
between CO (g) and hydrogen, as a result of which CH4 (g) and
H₂O (g) are formed. How much heat will be released during this
reaction if 67.2 liters of methane were obtained in terms of
normal conditions?
The thermochemical equation of the reaction is CO (g) + 3H₂ (g) ⇒ CH₄ + H₂O. 48 KJ heat will be released during this reaction if 67.2 liters of methane.
What is thermochemical equation ?A balanced stoichiometric chemical equation that includes the enthalpy change i.e, ΔH is called as thermochemical equation.
At STP,
1 mole of any gas occupies a volume of 22.4 L.
The volume of 67.2 L corresponds to 67.2 / 22.
= 3 moles.
1 mole of CO₂ obtained from 1 mole of methane.
3 moles of CH₄ will be obtained from 3 moles of CO₂.
The molar mass of methane = 16 g/mol.
Then, the mass of 3 moles of methane = 3 × 16
= 48 KJ
Thus,The thermochemical equation of the reaction is CO (g) + 3H₂ (g) ⇒ CH₄ + H₂O. 48 KJ heat will be released during this reaction if 67.2 liters of methane.
To learn more about thermochemical equation, follow the link;
https://brainly.com/question/2874342
#SPJ1
