God had warned Noah of the flood and directed him to build an ark. Noah had faith in God and began building.
Answer:
God Warned Noah for the Flood comindg to Earth to wash away all the bad people's lives and god also said get couple animals girls and boys then build an ark then bring your family and food there to then noah had a faith in god so he obey and start builind the ark in a top of a mountain
Explanation:
Hebrews 11:7
true or false in a chemical reaction the same number of each type of atom will always be present before and after the reaction takes place
Answer:
True
Explanation:
True because of the law of conservation of mass, the same same amount of atoms will be on both sides of the reaction.
Which list correctly compares how adding energy affects a substance during a phase change and not during a phase change?(1 point)
during a phase change: particles overcome forces of attraction and temperature stays the same
not during a phase change: particles become closer together
during a phase change: particles overcome forces of attraction and temperature stays the same
not during a phase change: temperature rises
during a phase change: particles overcome forces of attraction and temperature rises
not during a phase change: particles become closer together
during a phase change: particles overcome forces of attraction and temperature rises
not during a phase change: temperature rises
Which action happens at the microscopic scale as the temperature of a substance decreases and it eventually freezes?(1 point)
Particle motion decreases, and electrostatic forces pull particles closer together.
Particle motion increases, and the particles overcome electrostatic forces.
Particle motion decreases, and the particles overcome electrostatic forces.
Particle motion increases, and electrostatic forces pull particles closer together.
Which statement describes how a macroscopic property of gases provides information about microscopic gas particles?(1 point)
Gases fill their container, showing that gas particles are strongly attracted through electrostatic forces.
Gases have a fixed volume, showing that gas particles are strongly attracted through electrostatic forces.
Gases fill their container, showing that gas particles are not tied together and can move far apart.
Gases have a fixed volume, showing that gas particles are not tied together and can move far apart.
Answer:
1) during a phase change: particles overcome forces of attraction and temperature stays the same not during a phase change: temperature rises 2)Particle motion decreases, and electrostatic forces pull particles closer together.
3) Gases fill their container, showing that gas particles are not tied together and can move far apart.
Explanation:
4.
TRUE OR FALSE?
Frequency is how often a wave occurs in a given time period.
Group of answer choices
True
False
Answer:
The answer to this question is True
What does Bromine-80 decays by beta decay to?
Answer:
beta to Kr-80 or Se-80
Explanation:
sorry if wrong
determine the gram-formula mass of stearin acid C17H35COOH
Answer:
284.48 g/mol
Explanation:
You can find the molar mass of any molecule by looking at a periodic table and adding up all of the masses of each element. When you do this with stearic acid, you get somewhere around 284.5 g/mol. Hope this helped!
Help asapp plzz!!!!
Answer:
Determining what data to collect.
Explanation:
Another fact that many organisms are " linked " together is
Answer:
Individual organisms live together in an ecosystem and depend on one another. ... Some organisms can make their own food, and other organisms have to get their food by eating other organisms. An organism that must obtain their nutrients by eating (consuming) other organisms is called a consumer, or a heterotroph.
Explanation:
Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 15.4 u.
Answer:
N, B, Be, C
Explanation:
N (Nitrogen) has 14.0067 B (Boron) has 10.81 Be (Beryllium) has 9 and C (Carbon) has 12
The symbols for every chemical element that has atomic number greater than 3 and atomic mass less than 15.4 u are C, N, O, F, and Ne.
To find elements with atomic number greater than 3 and atomic mass less than 15.4 u, we'll consider the periodic table. Elements with atomic numbers 4 (Be) and higher meet the atomic number criterion. For the atomic mass, we'll look at elements with atomic masses below 15.4 u.
The chemical elements that fulfill both criteria are: Carbon (C) with atomic number 6 and atomic mass 12.01 u, Nitrogen (N) with atomic number 7 and atomic mass 14.01 u, Oxygen (O) with atomic number 8 and atomic mass 16.00 u, Fluorine (F) with atomic number 9 and atomic mass 18.99 u, and Neon (Ne) with atomic number 10 and atomic mass 20.18 u.
These elements meet the conditions of having atomic number greater than 3 and atomic mass less than 15.4 u. Therefore, the symbols for these elements are C, N, O, F, and Ne.
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1 gallon is how many mm
Answer:
0.133681 (cubic foot)
Explanation:
graph
1. You represented the allele for green peas with green clay and the allele for yellow peas with yellow clay. Are the alleles really these colors?
Answer:
pure-bred green with pure-bred yellow peas. Since yellow is dominant to green, all of the offspring were yellow. The green phenotype had disappeared. ... When a pure-bred green plant is crossed with a pure-bred yellow plant, the offspring inherit one allele of the color gene from each parent.
Explanation:
Ppbag at it again
which of the following forces could be used in electronic devices?
spring
gravitational
applied
magnetic
Answer:
Explanation:
poop
What is the name of the compound K3N
A chemical compound is a material made up of several types of molecules. Therefore, potassium Nitride is the name of the compound K[tex]_3[/tex]N.
What is chemical compound?A compound is indeed a substance that is composed of two or more separate chemical elements mixed in a defined ratio in chemistry. When the elements combine, they react and generate chemical connections that really are hard to break. These bonds occur as a result of atoms sharing or exchanging electrons.
A chemical compound is a material made up of several types of molecules (or molecular entities) that include atoms from much more than one chemical element and are bound together by chemical bonds. Potassium Nitride is the name of the compound K[tex]_3[/tex]N.
Therefore, potassium Nitride is the name of the compound K[tex]_3[/tex]N.
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1) Convert the following:
900g to kg
2.87L to uL
Answer:
0.9 kg
2870000 uL
there is a conversion calculator online
How many electrons does chlorine need to gain in order to be like Argon ?
- 2 electrons
- 3 electrons
- 1 electron
At a certain temperature, the equilibrium pressures of NO2 and N2O4 are 1.4 bar and 0.46 bar, respectively. If the volume of the container is doubled at constant temperature, what would be the partial pressures of the gases when equilibrium is re-established?
The partial pressure of NO₂ at equilibrium is 0.70 bar and the partial pressure of N₂O₄, at equilibrium is 0.23 bar.
Let x be the mole fraction of NO₂ and x' be the mole fraction of N₂O₄.
The total pressure according to Dalton's law of partial pressure is the sum of the partial pressures of each gas.
Let P be the total pressure of the gases, P' be the partial pressure of NO₂ = 1.4 bar and P" be the partial pressure of N₂O₄ = 0.46 bar.
So, P = P' + P"
= 1.4 bar + 0.46 bar
= 1.86 bar
Since P' = xP
x = P'/P
= 1.4 bar/1.86 bar
= 0.753
Also, P" = xP
x' = P"/P
= 0.46 bar/1.86 bar
= 0.247
Now, since the volume of the container is doubled at constant temperature, we use Boyle's law to determine the new pressure. P₁.
Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume provided the temperature remains constant. It is written mathematicaly as PV = constant
So, PV = P₁V₁
P₁ = (V/V₁)P
Since V/V₁ = 1/2
P₁ = (V/V₁)P
P₁ = P/2
P₁ = 1.86/2 bar
P₁ = 0.93 bar
So, the new partial pressure of NO₂, P₂ = xP₁
= 0.753 × 0.93 bar
= 0.70 bar
The new partial pressure of N₂O₄, P₃ = x'P₁
= 0.247 × 0.93 bar
= 0.23 bar
So, the partial pressure of NO₂ at equilibrium is 0.70 bar and the partial pressure of N₂O₄, at equilibrium is 0.23 bar.
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How many atoms of copper in 3. 11 g of copper
Hope you could get an idea from here.
Doubt clarification - use comment section.
Nitric oxide (NO) from car exhaust is a primary air pollutant. Calculate the equilibrium constant for the reaction
N2(g) + O2(g) equilibrium reaction arrow 2 NO(g)
at 25°C using the data listed in the supporting materials.
Calculate the equilibrium constant at 1496°C, which is a typical temperature inside the cylinders of a car's engine after it has been running for some time. (Assume that both ΔrH° and ΔrS° are temperature independent.)
This problem is asking for the equilibrium constant at two different temperatures by describing the chemical equilibrium between gaseous nitrogen, oxygen and nitrogen monoxide at 25 °C and 1496 °C as the room temperature and the typical temperature inside the cylinders of a car's engine respectively:
N₂(g) + O₂(g) ⇄ 2 NO(g)
Thus, the calculated equilibrium constants turned out to be 6.19x10⁻³¹ and 9.87x10⁻⁵ at the aforementioned temperatures, respectively, according to the following work:
There is a relationship between the Gibbs free energy, enthalpy and entropy of the reaction, which leads to the equilibrium constant as shown below:
[tex]\Delta _rG=\Delta _rH-T\Delta _rS\\\\\Delta _rG=-RT ln(K)[/tex]
Which means we can calculate the enthalpy and entropy of reaction and subsequently the Gibbs free energy and equilibrium constant. In such a way, we calculate these two as follows, according to the enthalpies of formation and standard entropies of N₂(g), O₂(g) and NO(g) since these are assumed constant along the temperature range:
[tex]\Delta _rH=2*90.25 kJ/mol - (0 kJ/mol+0 kJ/mol)=180.5kJ/mol\\\\\Delta _rS=2*(0.211 kJ/mol*K)-(0.192kJ/mol*K+0.205kJ/mol*K)=0.025kJ/mol*K[/tex]
Then, we calculate the Gibbs free energy of reaction at both 25 °C and 1496 °C:
[tex]\Delta _rG_{25\°C}=180.5-(25+298.15)*0.025=172.42kJ/mol\\\\\Delta _rG_{1496\°C}=180.5-(1496+298.15)*0.025=135.65kJ/mol[/tex]
And finally, the equilibrium constants derived from the general Gibbs equation and Gibbs free energies of reaction:
[tex]K=exp(-\frac{\Delta _rG}{RT} )\\\\K_{25\°C}=exp[-\frac{172420 J/mol}{(8.3145\frac{J}{mol*K})(298.15K)} ]=6.19x10^{-31}\\\\K_{1496\°C}=exp[-\frac{135650J/mol}{(8.3145\frac{J}{mol*K})(1769K)} ]=9.87x10^{-5}[/tex]
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(Gibbs free energy) https://brainly.com/question/15213613I need the skeleton equation for the following sentence!
Carbon dioxide gas and solid calcium oxide are produced in the decomposition of solid calcium carbonate.
Answer:
A. CaCO(s)+SO(g)+O(g) --> CaSO(s)+CO(g)
A. CaCO(s)+SO(g)+O(g) --> CaSO(s)+CO(g)
the empirical mass is a whole number multiple of the molar mass true or false?
Answer:
True
Explanation:
help plzzzzzzzzzzzzzzzzz
Answer:
C
I hope that this helps.
chemist wished to find the volume of a large barrel and had no equipment for measuring the amount of water needed to fit it. He added of 400g of pure sodium chloride barrel and filled with chlorine free water. After thorough mixing a 100 ml sample of the solution re
Answer:
Place the object in the graduated cylinder, and record the resulting water volume as "b." Subtract the volume of the water alone from the volume of the water plus the object. For instance, if "b" was 50 milliliters and "a" was 25 milliliters, the volume of the irregularly shaped object would be 25 milliliters.
what are nanofluids and how they work?
Answer:
What is nanofluids?
Nanofluids are engineered suspensions of nanometer-sized solid particles in a base fluid. Suspending small solid particles in the energy transmission fluids can improve their thermal conductivity and provides an effective and innovative way to enhance their heat transfer characteristics significantly.
How nanofluids work?
Nanofluid refers to the dispersion of metal or non-metal nano-powder into traditional heat exchange media such as water, alcohol, and oil to prepare a uniform, stable and high thermal conductivity. The traditional heat exchange medium has a low thermal conductivity and has been unable to meet the growing demand for industrial engineering heat exchange. The thermal conductivity of some metal or non-metal nanoparticles is often hundreds of times higher than that of heat-conducting media. For example, common silicon carbide nanoparticles have a thermal conductivity of 170-270 W/m•K. The researchers found that if the nanoparticles can be uniformly and stably dispersed in the heat transfer medium, the thermal conductivity of the nanoparticles will be greatly improved.
Which event is an example of an exothermic reaction?(1 point)
A. Combustion
B. Evaporation
C. Decomposition
D.Melting ice
Answer:
Combustion
Explanation:
An exothermic reaction is defined as a reaction that releases heat and has a net negative standard enthalpy change. Examples include any combustion process, rusting of iron, and freezing of water.
Combustion is a type of exothermic chemical reaction that generates light and heat in most cases, and occurs fairly quickly.
What is an exothermic reaction?An exothermic reaction is one that when it occurs releases energy in the form of heat or light to the environment.
Characteristics of an exothermic reactionWhen this type of reaction occurs, the products obtained have lower energy than the initial reactants.Most of the exothermic reactions are oxidation, and when they are very violent they can generate fire, as in combustion.Combustion is a very fast oxidation reaction that occurs between materials called fuels and oxygen.Therefore, we can conclude that combustion is an example of an exothermic reaction that releases large amounts of heat, which can lead to fire.
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What is the pH of a solution with a 3.2 x 10−5 M hydronium ion concentration? (5 points)
Select one:
a.4.3
b.4.5
c.11
d.12
Answer:
b. 4.5
Explanation:
Since it is hydronium ion concentration, that means it is an acid.
pH formula = -log[H3O+]
-log(3.2 x 10^{-5} = 4.5
Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed the results and found two ending substances. One of the ending substances was a white solid. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Serena mixed together?
The diagrams that shows the repeating groups of atoms that make up the samples which were mixed together is option D.
A chemical reaction is said to have occurred when there a rearrangement of atoms in a substance. This rearrangement of atoms in the substance leads to the formation of new substances.
In this case, we must note that the combination of reactants to be chosen must posses the atoms shown as part of the one of the end substance. The only option that satisfies this requirement is option D.
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Answer:D
Explanation:DDDDD
Choose the correct interpretation for the statement below:
"Relative atomic mass of T is 2"
A) The mass of one mole of T is two.
B) The mass of one T atom is double compared to the mass of one carbon-12 atom.
C)Mole ratio of T atom to 1/12 of carbon-12 atom is two.
D)The ratio of the mass of one T atom to 1/12 of the mass of one carbon-12 atom is two.
Answer:
b
Explanation:
One student made the incomplete diagram shown below to represent the relationship between Magma, Igneous Rocks, and Metamorphic Rocks.
Which of these is the correct next step to complete the diagram?
A. Put an arrow labeled deposition and lithification, pointing from Igneous Rocks to Magma.
B. Put an arrow labeled heat and pressure, pointing from Magma to Igneous Rocks.
C. Put an arrow labeled heat and melt, pointing from Metamorphic Rocks to Magma.
D. Put an arrow labeled cools and crystallizes, pointing from Igneous Rocks to Metamorphic Rocks.
Answer:
the answer is B
Explanation:
this shows the next step and shows how magma turns into igneous rocks by heat and pressure
What element makes up graphene
What is a proofreading tip you should use to double check that your work is error free
How you can check to make sure your work is error-free is by:
Placing a ruler under each line as you are reading itIf you are able to, try checking your work when you are the most alert so it can be easier to track a mistakeTry to read it out loud if you are comfortable with thatYou can have a friend, family member, or teacher help read it and check over itThink about the common mistakes you makeIf your work is computer written then you can use a spell checker app such as GrammarlyRead over your work at least two or three timesHope this Helps
13. Which has the largest atomic radius?
A. fluorine B. chlorine C. bromine
D. a bromine anion with a charge of 1-
Answer:
bromine
Explanation: