Answer:
aluminum has 3 energy levels and 3 valance electrons
Name the gas released when group 1 elements react with water
Answer:
Hydrogen Gas
the chemical formula is H2
Answer:
hydrogen gas
Explanation:
Na + H20 -------> Na20 +H2
true or false? solvents that are not in use should be capped and stored in the fume hood
When burning 180g of glucose in the presence of 192g of oxygen, water and carbon dioxide are produced. If 108g of water is produced, how many grams of carbon dioxide are produced?
The mass of carbon dioxide in this is 264 g according to the given data.
What is molar mass?The molar mass is basically the total mass in grams of the atoms that make up a molecule per mole. Molar mass is measured in grams per mole.
Combustion is the process of burning glucose in the presence of oxygen.
The balanced reaction is
[tex]C_6H_1_2O_6+6O_2---- > 6CO_2+6H_2O[/tex]
As a result, each mole of glucose requires six moles of oxygen molecules.
Glucose has a molar mass of 180g per mole.
The present moles of glucose = mass / molar mass = 180 / 180 = 1 moleThe present moles of oxygen = mass / molar mass = 192 / 32 = 6 molesAs a result, the reaction will be completed, with one mole of glucose reacting with six moles of oxygen to produce six moles of Carbon dioxide and six moles of water.
Carbon dioxide produced mass = moles X molar mass = 6 x 44 = 264 g
Thus, 264g will be the mass of the carbon dioxide produced.
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514 g of a substance occupies a volume of 340 mL. What is the density of this
substance in g/L?
Please explain how you got your answers :)
How might waves relate to energy?
Waves are related to energy because waves carries energy.
What is energy?Energy is defined as a quantitative property that is transferred to a body or to a physical system to perform there work.
It can also be defined as a ability to do work or ability to exert a force causing displacement of the objects.
Energy is divided into two parts.
Potential energy - It is defined as a stored energy that depend upon the relative position of various part of the system.Kinetic energy - It is defined as the energy of an object that has its motion.The amount of energy carried is related to there frequency and there amplitude. The wave travels and carry energy with it.
Thus, waves are related to energy because waves carries energy.
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The specific heat of the metallic element rhodium is 0. 240 j/g-k at 25°c. If 586 j of heat is added to an 80. 0 g block of rhodium metal that is initially at 25. 0°c, what is the expected final temperature of the block?.
The specific heat of the metallic element rhodium is 0. 240 j/g-k at 25°c. If 586 j of heat is added to an 80. 0 g block of rhodium metal that is initially at 25. 0°c, the expected final temperature of the block 55.5 °C.
As we know heat is equal to:
Q= mcΔT
Given values:
M= 80 g
C = 0.240 J/g K
Q= 586 J
To find final temperature
ΔT = 586 / 80 x 0.240 = 30.5 °C
Final temperature =25 + 30.5 = 55.5 °C
The final temperature is 55.5 °C.
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Calculate the maximum wavelength of light capable of dissociating the cl–f bond in one molecule of chlorine monofluoride if the bond energy, or bond dissociation energy, is 251 kj/mol.
According to bond energy, the maximum wavelength of light is 475 nanometers.
We need to know about bond energy to solve this problem. Bond energy is the energy needed to bond other atoms in the molecule. To determine the energy in one molecule of chlorine monofluoride, we can use this formula:
E = BE / Na
where E is the energy of photon, BE is bond energy and Na is Avogadro's number (6.02 x 10²³ atoms/mol)
Now, we can calculate the shortest wavelength by using Einstein's equation for photon energy:
E = h . c / λ
where h is Planck constant (6.6 x 10¯³⁴ J.s), c is the speed of light (3 x 10⁸ m/s) and λ is the wavelength.
From the question above, we know that
BE = 251 kJ/mol = 251 x 10³ J/mol
By substituting the given parameters, we can calculate the maximum wavelength
E = BE / Na
h . c / λ = 251 x 10³ / 6.02 x 10²³
6.6 x 10¯³⁴ . 3 x 10⁸ / λ = 251 x 10³ / 6.02 x 10²³
λ = 4.75 x 10¯⁷ m
λ = 475 nm
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What is the trend in the ionic charges of the elements in groups 1, 2 and 13 of the periodic table (I will be giving brainliest to whoever gives the best answer and explains it)
Group 1: 1+
Group 2: 2+
Group 13: 3+
Explanation:The charges of the ions are dependent on the number of valence electrons.
Valence Electrons
Group 1 has 1 valence electron, group 2 has 2, and group 13 has 3. It is important to remember that elements will attempt to have a full valence shell. They may either attempt to lose all of their valence electrons or fill the energy level with 8 electrons.
Since all of these groups have less than 4 valence electrons, they will attempt to lose their valence electrons.
Determining Charges
When atoms lose electrons, they gain a positive charge. Since all of these elements will lose electrons, all of the ions will be positive, also known as a cation.
The positive charge of an element is equal to the number of electrons the atom loses. This means that group 1 will have a 1+ charge because it loses 1 electron. Continue this pattern to determine that group 2 will have a 2+ charge and group 13 will have a 3+ charge.
PLEASE HELP IVE BEEN STUCK ON THESE KINDA OF PROBLEMS FOR HOURS
The frequency of the wave is 1.33 * 10^15 Hz.
What is the frequency?We know that a wave has both the magnitude and the direction of the wave. In this case, we can see that the electron is said to have the speed of light and we need to find the frequency of the electron.
From the wave formula;
c = λf
c = speed of light
λ = wavelength
f = frequency
c = 3 * 10^8 m/s
λ = 225 * 10^-9 m
f = ???
f = c/ λ
f = 3 * 10^8 m/s/225 * 10^-9 m
f = 1.33 * 10^15 Hz
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a 1.0 lbm/h stream of argon at 80 of and 1 atm is mixed adiabatically with 0.5 lbm/h co2 at 1 atm and 550 of to produce a mixture at 1 atm. assuming constant specific heats for both gases evaluated at the given inlet temperatures,
The answer would be 398.40 K and 4.71 * 10^-6 kW/K.
Temp. of Argon stream : 80 F = 299.817 K
Temp of CO2 stream : 550 F = 533.15 K
CO2 mass, flow rate : 0.5 lbm/h = 6.299 * 10^-5 kg/s
Ar,mass, flow rate : 1 lbm / h = 0.000125 kg /s
(a) Particular heat capacity of Ar : 0.523 kJ/Kg.K
Particular heat capacity of CO2 : 0.756 kJ/kg.K
Mass balance expression = mo3 = mo1 + m02 ; mo3 is mass mixture.
Formula to find heat capacity of mixed particle : cpm mo1*cpa + mo2cpc/mo1 + mo2
= 0.6010 kJ/ kg.K
Formula for energy balance law mo3*cpm*T03 = mo1*cpa*To1 + mo2*cpc*To2
Put the values , and the temperature of the mixture is 398.40 K
(b) Formula for rate of entropy geneartion for process is
del So= mo1*cpa ln(T03 / T01) + mo2*cpc in (T03 / T02)
Put the values and we get del So = 4.71 * 10^-6 kW/K
The given question is incomplete : (a) Final Temperature ?
(b) Rate of entropy generation of the process ?
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how did telescope chage how scientists see and intereact with the universe
Answer:
Telescopes have opened our eyes to the universe. Early telescopes showed that Earth was not the center of the universe, as was previously believed. They also showed mountains and craters on the moon. Later telescopes have revealed geography and weather on the planets in our solar system.
Explanation:
Which statement best describes a scatterplot?
A. it shows data as a percentage of a whole
B. it shows data points connected by a single line
C. it shows quantitative data that relate two variables
D. it shows qualitative data grouped by similarities
The statement that best describes a scatterplot is that it shows quantitative data that relate two variables (option C).
What is a scatter plot?A scatter plot is a type of graph that displays the relationship between two variables.
The scatter plot is portrayed on a cartesian plane where one of the variables is on an axis called X-axis and the other is on another axis called y-axis.
One of the variables is the independent variable while the other variable is the dependent variable.
Therefore, the statement that best describes a scatterplot is that it shows quantitative data that relate two variables.
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consider two gases, a and b, that are in a container at room temperature. what effect will the following change have on the rate of the reaction between these gases? the number of molecules of gas a is doubled.
The correct option is (B) increase.
If the number of molecules of gas a is doubled, the rate of reaction will increase.
What is the rate of reaction?The measure of the change in reactant or product concentration per unit of time is known as the reaction rate for a specific chemical reaction.
The speed at which a chemical reaction proceeds is known as the reaction rate. The concentration of a reactant that is consumed in a unit of time or the concentration of a product that is produced in a unit of time is two common ways to define it (amount per unit volume).
How can the rate of reaction be changed?The rate law and collision theory both state that reaction rate increases with concentration. Collisions happen more frequently as reactant concentration rises. Pressure causes a rise in the rate of gaseous reactions, which is actually comparable to a rise in the gas's concentration.
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The complete question is:
"Consider two gases, A and B, are in a container at room temperature. What effect will the following changes have on the rate of the reaction between these gases? The number of molecules of gas A is doubled.
(A)decrease
(B)increase"
The total of all forces applied on an object is the ___.
A.applied force
B.gravity
C.net force
D.magnetism
Answer:
C. Net force
Explanation:
Please Help Quick ASAP Hurry
Refer to your periodic table. The orbital notation for Aluminum in the outer most shell would have how many electrons in the S orbital, and how many in the p orbital?
1 electron in the s orbital, and none in the p.
2 electrons in the s orbital. None in the p orbital
2 electrons in the s orbital and 1 in the p orbital
In the outermost shell of aluminum, there are 2 electrons in the s orbital and 1 in the p orbital.
What is the orbital diagram?Let us recall that the orbital diagram is the diagram that shows the arrangement of the electrons in an atom. Let us recall that aluminum is an element of group 13 of the periodic table. This implies that there are three electrons in the outermost shell of the atom.
Now, we can see the orbital diagram of aluminum in the image that have been attached to this answer. It is therefore very much clear that there are three electrons in the outermost shell.
In the outermost shell of aluminum, there are 2 electrons in the s orbital and 1 in the p orbital.
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A recipe requieres 500Ml of chicken broth. Convert this volume to gallons.
help me please it's due tomorrow
After selecting the hypothesis, the next step is to design an experiment to test the hypothesis.
For example, our hypothesis is "deforestation causes soil erosion".
A hypothesis should define two variables that may exhibit a relationship between them. Scientists define which variable will be the independent variable and the dependent variable.In the above example, independent variable is deforestation and dependent variable is soil erosion.Confounding variables are unwanted variables that can affect the dependent variable of an experiment. Thus, it eventually also affect the overall data and results of the experiment. For example, possible confounding variables here could be different materials in the soil.Eliminating confounding variables helps us know for sure that changes in the dependent variable are caused solely by the independent variable.Learn more about variables here:
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The hardness of water is expressed as ppm of calcium carbonate (CaCO3). In a sample analysis of water from a spring, a hardness between 80 and 100ppm of CaCO3 was reported. What would be the equivalence of these values, expressed as a percentage of CaCO3?
The equivalence of these value is 1.75 × 10⁻³ M.
What is equivalence ?Hardness = 175 mg CaCO₃/L
or mass of CaCO₃ in 1 L = 175 × 10⁻³ grams
Now,
Molar mass of CaCO₃ = 40 + 12 + ( 3 × 12 ) = 100 grams/mol
The concentration of CaCO₃ = number of moles / volume
or
= (175 × 10⁻³ / 100) / 1
or
= 1.75 × 10⁻³ M
Now,
CaCO₃ ⇒ Ca²⁺ + CO₃²⁻
1.75 × 10⁻³ M 1.75 × 10⁻³ M 1.75 × 10⁻³ M
thus,
the concentration of Ca²⁺ ions in water = 1.75 × 10⁻³ M
An equivalency relation on a set S is a transitive, symmetric, and reflexive relation on S. A square and a triangle cannot be superimposed since they are not equivalent in force, quantity, or value or in area or volume.
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what modifications to a fractional distillation setup can be made in order to increase the speed or efficiency of the separation? select one or more: place the sample flask and fractionating column in an ice bath. wrap aluminum foil around the sample flask and fractionating column. place the receiving flask in an ice bath. wrap aluminum foil around the receiving flask.
You can modify to wrap aluminum foil around the sample flask and fractionating column.
And place the receiving flask in an ice bath.
What is fractional distillation?Separating a mixture into its constituent parts, or fractions is known as fractional distillation. By heating chemical mixtures to a temperature where one or more fractions of the mixture evaporate, chemical compounds are separated.
Fractional Distillation can also be described as the separation of a liquid combination via distillation, usually using a fractionating column, into fractions with different boiling points (and thus chemical composition).
Chemicals can be cleaned by fractional distillation, and mixtures can be divided into their constituent parts.
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Calculate the energy of blue light(425nm). What is the energy of a mole of blue photons?
The energy of a mole of blue photons is determined as 4.68 x 10⁻¹⁹ J.
What is the energy of a photon?
The amount of energy carried by a photon is directly proportional to the photon's electromagnetic frequency and inversely proportional to the wavelength of the photon.
E = hf
E = hc/λ
where;
f is the frequency of the blue lightλ is wavelength of the blue light = 425 nmc is the speed of the blue lighth is Planck's constantThe energy of a mole of blue photons is calculated as follows;
E = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (425 x 10⁻⁹)
E = 4.68 x 10⁻¹⁹ J.
Thus, the energy of a mole of blue photons is determined as 4.68 x 10⁻¹⁹ J.
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Ionic compounds can be made from a metallic ion and a nonmetallic ion. Metallic ions are positive (cations). Nonmetallic ions are negative (anions). For each equation given below, enter the sum in the space provided.....
Answer:
Since metals have more number of electrons therefore, they donate extra electron(s) in order to gain stability. Whereas non-metals have less number of electrons than metals. Hence, non-metals readily gain electron(s) in order to gain stability.
Sum for the mentioned entries are as follows.
(+1) + (-1) = 1 -1 = 0
(+2) + (-2) = 2 - 2 = 0
2(+1) + (-2) = 2 - 2 = 0
(+3) + 3(-1) = 3 - 3 = 0
3(+2) + 2(-3) = 6 - 6 = 0
The temperature is a beaker of water is 50 degrees Celsius. Kiley puts the water into a freezer. After a few minutes, she measured the temperature again. It is now 10 degrees Celsius. How did the water particles change?
The water particles moves closer together towards each other.
The water in the beaker is in a liquid state of matter as given in the statement and the temperature decreases from 50°C to 10°C when placed in a freezer by Kiley.
This means that heat from water is gradually being lost ,as the liquid water undergoes freezing in a solid state. When the water in liquid state is freezed, water molecules, which were moving more freely in liquid state move closer to each other because the speed at which the water molecules in the liquid state moved has been reduced in solid state (ice).
The process in where matter is changing from the liquid to the solid state is known as Freezing. the freezing point of liquid like water is 32°F or 0°C.
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study the reaction
hydrochloric acid + sodium hydroxide = sodium chloride + water
if 36.5 g og hydrochloric acid reacts with 40.0 g of sodium hydroxide which stat ment about the products is true
The true statement is; the mass of sodium chloride formed is less than 76 grams.
What is the law of conservation of mass?From the law of conservation of mass, we know that the total mass of the reactants and the products must remain the same. This is summarized in the axiom that the mass can not be created nor destroyed in a chemical system.
In this chemical system, we have 40 g of sodium hydroxide and and 36 g of hydrochloric acid. The reaction occurs thus; hydrochloric acid + sodium hydroxide = sodium chloride + water
Applying the law of conservation of mass, we can see that the true statement is; the mass of sodium chloride formed is less than 76 grams.
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Missing parts;
In a chemical reaction, 36 grams of hydrochloric acid reacts with 40 grams of sodium hydroxide to produce sodium chloride and water. Which statement is correct?
The mass of water formed is 76 grams.
The mass of sodium chloride formed is 76 grams.
The mass of water formed is greater than 76 grams.
The mass of sodium chloride formed is less than 76 grams.
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Answer in the attachment above.....
which has more calories : table sugar or aspartame ?
Answer: Aspartame
Explanation:
......................
Answer:
The real answer is ...................... .
which is the best example of immiscible liquids? two polar liquids that have high surface tensions a polar liquid and a nonpolar liquid that have low surface tensions two nonpolar liquids that can dissolve into one another
A polar liquid and a nonpolar liquid that don't mix together is the best illustration of immiscible liquids among those mentioned above.
what are immiscible liquids?Liquids that are immiscible do not combine to generate another liquid
Here are a few more instances of immiscible liquids:
The kerosene and water mixtureswater and palm oil combinedwater and peanut oil combinedpetrol and waterContrarily, miscible liquids are two liquids that can mix together to make one larger liquid.
Therefore, a polar fluid and a nonpolar fluid that are unable to melt into one another are the greatest examples of immiscible liquids from the alternatives above.
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Is it possible to conduct a Boyle's law investigation in which yhe volume is the independent varibale
Boyles law shows the relation between effect of pressure on volume at constant temperature.
What is Boyle's law ?
In boyle's law mass is independent variable and volume is dependent variable. The equation of boyle's law is
pV= constant.
Because the gas particles are compressed closer together as the pressure on a gas rises, the volume of the gas decreases.
In contrast, as a gas's pressure falls, its volume rises as a result of the gas's ability to spread its particles farther apart. Because the volume of the gas has risen, weather balloons become larger as they ascend through the sky to lower pressure areas.
Therefore, Boyles law shows the relation between effect of pressure on volume at constant temperature.
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A reaction has an equilibrium constant, keq, of 50. When performed in the presence of an appropriate enzyme, the forward rate constant is increased 20-fold. What will happen to the reverse rate constant?.
Option B) The reverse rate constant will increase 20-fold, because an enzyme does not alter the equilibrium constant, it must catalyze both forward and reverse reactions to the same extent.
What is the forward reaction’s equilibrium constant?The forward reaction rate constant divided by the reverse rate constant gives the equilibrium constant as per the catalyze that performs the role.
When the reaction is reversed, what happens to K?The reciprocal of the equilibrium expression for a reaction written in the forward direction is the expression for a reaction written in the reverse direction. The forward reaction’s constant is K, while the reverse reactions is K’.
Is it feasible for a reaction to have big forward and reverse rate constants yet a tiny equilibrium constant?Yes, the forward to the backward ratio of the equilibrium constant is what makes it feasible for a reaction to have big forward and reverse rate constants yet a tiny equilibrium constant.
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Complete Question
A reaction has an equilibrium constant, Keq, of 50. When performed in the presence of an appropriate enzyme, the forward rate constant is increased 20-fold. What will happen to the reverse rate constant?
a. In will decrease 20-fold.
b. It will increase 20-fold.
c. It will be unaffected.
(b) Figure 1 shows the melting points and the boiling points of four substances, A, B, C and D.
Figure 1
Temperature
in °C
250
200
150-
100
50
0-
<-50
-100
<-150
-200
-250
*
A
B
*
C
Substance
-X
D
Which substance is liquid over the greatest temperature range?
E
Key
x Melting
point
. Boiling
point
Figure 1 shows the melting points and the boiling points of four substances, A, B, C and D. The substance is liquid over the greatest temperature range is C.
Hence, Option 3 is correct answer.
What is Melting Point ?The Melting point (MP) of a substance is defined as the temperature at which a solid melts and change from a solid state to a liquid state may coexist in equilibrium. Melting point is a physical property.
Example of melting point: Sodium chloride (NaCl) is an ionic compound. Sodium chloride (NaCl) is made up of strong ionic bonds and it melts at only high temperatures that is 801°C.
What is Boiling Point ?Boiling point is defined as the particular temperature where the liquid-gas phase change occurs and the vapor pressure of a liquid equals the external pressure surrounding the liquid.
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Note: The question is incomplete on the portal. Here is the complete question.
Question: Figure 1 shows the melting points and the boiling points of four substances, A, B, C and D. Which substance is liquid over the greatest temperature range ?
1. A
2. B
3. C
4. D