Answer:
That we know about yes, but physicians still say there are more things out there. (we do not know about these yet tho)
Explanation:
The volume of a gas is increased and the temperature is maintained consent. The original volume was 1200 mm³ and it's pressure was 100psig. If the volume is increased to 2250 mm³ what is the new pressure in psi?
The formula for the ideal gas law is P*V = n*R*T, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
In this case, we are assuming that the number of moles and temperature are constant. Therefore, we can write:
P1*V1 = P2*V2, where P1 is the original pressure, V1 is the original volume, P2 is the new pressure, and V2 is the new volume.
We can solve for \(P2:P1*V1 = P2*V2P2\)
= P1*V1/V2Now we can substitute in the given values:
\(P1 = 100 psigV1 = 1200 mm³V2 = 2250 mm³P2 = 100 psig * 1200 mm³ / 2250 mm³P2 = 53.33 psig\)
Therefore, the new pressure is 53.33 psig.
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Which of the following molecules is a triglyceride?
The molecule that is a triglyceride is (c) CH2OH-CO-CH2OH.
Triglycerides are a type of lipid molecule composed of a glycerol backbone and three fatty acid chains.
The glycerol backbone consists of three carbon atoms, each of which can bind to a fatty acid chain. The fatty acid chains are long hydrocarbon chains with a carboxyl group at one end.
Looking at the given options, (c) CH2OH-CO-CH2OH represents a glycerol molecule. The presence of three hydroxyl groups (-OH) indicates that it is a glycerol molecule, which is the backbone of triglycerides.
However, the given molecule does not have any fatty acid chains attached to the glycerol backbone.
Triglycerides are formed when the hydroxyl groups of the glycerol molecule react with the carboxyl groups of fatty acid chains, resulting in the formation of ester bonds.
Since the given molecule lacks fatty acid chains, it is not a complete triglyceride.
Therefore, among the given options, none of the molecules provided can be identified as a complete triglyceride.
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Sulfur burns in the air to form 33.6L of sulfur dioxide. (S = 32, O =16, 64g of sulfur dioxide has 22.4L, 32g of oxygen has 22.4L)
find mass of reacted oxygen
find mass of required oxygen
The mass of oxygen reacted/required in this reaction is obtained as 48g.
What is stoichiometry?The term stoichiometry has to do with mass- volume or mass - mole relationship which ultimately depends on the balanced reaction equation.
Now, we have the reaction; S + O2 ------>SO2
If 1 mole of sulfur dioxide contains 22.4 L
x moles of sulfur dioxide contains 33.6L
x = 1.5 moles of sulfur dioxide.
Since the reaction is 1:1, the number if moles of oxygen required/reacted is 1.5 moles.
Mass of oxygen required/reacted = 1.5 moles * 32 g/mol = 48g
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Help me pls!
What is heliuim?
Answer:
it's a chemical Element
Explanation:
symbol He
atomic number 2.
Which statement best describes energy?(1 point) Responses Energy is a push or pull on an object that will change the motion of the object. Energy is a push or pull on an object that will change the motion of the object. Energy is the ability to do work. Energy is the ability to do work. Energy is the force that causes movement in an object. Energy is the force that causes movement in an object. Energy is the power derived from the utilization of simple machines. Energy is the power derived from the utilization of simple machines.
The statement that best describes energy is energy is the ability to do work. Option 3 is correct.
Energy is a property or characteristic of a system or object that allows it to perform work. Work, in physics, is defined as the force applied to an object multiplied by the distance over which the force is applied. Energy can be transformed from one form to another, but it cannot be created or destroyed. It can only be transferred from one object or system to another.
Energy can be stored in different forms such as potential, kinetic, thermal, chemical, electrical, and nuclear energy. Potential energy is the energy that an object possesses due to its position or state, whereas kinetic energy is the energy of motion. Thermal energy is the energy of a system or object due to its temperature, and chemical energy is the energy stored in the bonds between atoms and molecules. Option 3 is correct.
The complete question is
Which statement best describes energy?
Responses Energy is a push or pull on an object that will change the motion of the object. Energy is a push or pull on an object that will change the motion of the object. Energy is the ability to do work. Energy is the force that causes movement in an object. Energy is the force that causes movement in an object. Energy is the power derived from the utilization of simple machines. Energy is the power derived from the utilization of simple machines.To know more about the Energy, here
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What was the mass of zinc used in the first reaction of the experiment? note: depending on the actual amount of substances dispensed in the lab, there is a range of possible answers. Pick the value that is closest to yours
When zinc reacts with hydrochloric acid, the response bubbles vigorously as hydrogen fueloline is produced.
The manufacturing of a fueloline is likewise an illustration that a chemical response is occurring. When dilute hydrochloric acid is introduced to granulated zinc positioned in a take a look at tube, zinc metallic is transformed to zinc chloride and hydrogen fueloline is developed withinside the response. In the response we will see that a zinc chloride salt is fashioned and hydrogen fueloline is developed. The developed hydrogen fueloline is colourless and odourless. When Zinc granules reacts with Hydrochloric acid ,it'll produces hydrogen fueloline and zinc chloride.
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Explain the similarities and differences between putting a beaker of ethanoic acid in the refrigerator and mixing it with sodium carbonate
Answer:
See explanation
Explanation:
When a beaker of ethanoic acid is placed in the refrigerator, its temperature drops and the vessel feels cool.
Now, when we mix ethanoic acid and sodium carbonate, an endothermic reaction occurs, fizzing is observed as carbon dioxide is given off and heat is lost to the surroundings causing the reaction vessel to feel cool to touch.
The difference between putting ethanoic acid in the refrigerator and adding sodium carbonate to the solution is that, in the former, no new substance is formed. The substance remains ethanoic acid when retrieved from the refrigerator. In the later case, new substances are formed. The substance is no more ethanoic acid because a chemical reaction has taken place.
The____ is the basic unit of life
Answer:
cell
Explanation:
Cells are the most simple, basic units of life
Answer:
the CELL is the basic unit of life.
Explanation:
I had this is my science lesson
have a great day!
hope this helps!
feel free to mark as brainliest! ;)
9) Boron (B) + Nitrogen (N)
Answer:
if u combined them itd would be BN
is electromagnetic energy and metals physical or chemical change?
Answer:
Chemical changes release a form of energy called electromagnetic energy, which travels through space as waves.
An hcl solution has a ph = 5. if you dilute 10 ml of the solution to 1 l, the final ph will be:________
The final pH after diluting 10 mL of the HCl solution to 1 L will be 7.
To find the final pH after diluting the HCl solution, we need to use the equation for pH, which is given by pH = -log[H+].
Given that the initial pH of the HCl solution is 5, we can find the concentration of H+ ions using the formula [H+] = 10^(-pH). Substituting the value of pH into the equation, we have [H+] = 10^(-5).
When we dilute 10 mL of the solution to 1 L, we are diluting the HCl solution by a factor of 100. This means that the concentration of H+ ions will also decrease by the same factor.
To calculate the final pH, we need to find the new concentration of H+ ions after dilution. The new concentration can be calculated by dividing the initial concentration by the dilution factor. Therefore, the final concentration of H+ ions is [H+] = (10^(-5)) / 100.
Now, we can find the final pH using the equation pH = -log[H+]. Plugging in the value of the final concentration, the final pH is pH = -log[(10^(-5)) / 100].
Simplifying the expression, we get pH = -log(10^(-7)) = -(-7) = 7.
Therefore, the final pH after diluting 10 mL of the HCl solution to 1 L will be 7.
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How many moles in 28 grams of CO₂?
Answer:
I think the answer Is 0.636 mol of CO2!
4. Arnold put some sand in his aquarium. At first, the water looked muddy. Lat
water looked clear. How did this happen?
A Sand dissolved in water.
C. Sand settled at the bottom
B. Sand is white and clear.
D. Sand spread evenly throughou
Answer:
C sand settled down at the bottom, as sand is infact a solid, except it has the ability to take shpae/ dissolve in it's container.
50.0 ml of 0.100 m hcl is titrated with 0.100 m naoh. what is the ph at the beginning of the titration? what will be the ph after the addition of 20.0, 50.0, and 60.0 ml of naoh? what is the ph at the equivalence point?
The pH at the beginning of the titration is 1 so the pH after adding 20.0 mL of NaOH is 1.70 after adding 50.0 mL of NaOH is 2.21, and after adding 60.0 mL of NaOH is 2.40 and The pH at the equivalence point is 7.
In this titration, a strong base, NaOH, is added to a weak acid, HCl, to determine its concentration.
At the beginning of the titration, the pH is determined by the dissociation of the weak acid, which makes the solution acidic with a pH of 1. As NaOH is added, it reacts with HCl in a 1:1 ratio to form water and salt. This reaction neutralizes the acidic solution and increases the pH.
At the equivalence point, all the HCl is neutralized, and the solution is neutral, giving a pH of 7. The pH curve obtained from this titration is a typical shape for an acid-base titration involving a weak acid and a strong base.
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What is the density of nitrogen gas at 1.98 atm and 74.5°C? Select one 0.514 g/L 9.07 g/L 1.94 g/L 0.972 g/L 4.54 g/L
The given pressure and temperature conditions correspond to 1.98 atm and 74.5 °C, respectively. The density of nitrogen gas at 1.98 atm and 74.5 °C is 0.972 g/L.
What is density?
Density is the mass of a substance per unit volume. Its SI unit is kg/m³.
The formula to find the density of any object is given:
density = mass/volume
Here, the density of nitrogen gas at 1.98 atm and 74.5°C is asked.
It can be calculated by using the ideal gas law, which is given as:
PV = nRT
Where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature.
We can manipulate the ideal gas law to solve for density as follows:
density = (n x molar mass) / volume
The molar mass of nitrogen is 28 g/mol. We can substitute the given values in the ideal gas law to find the number of moles of nitrogen gas. n = PV / RT
Substituting the given values, we get:n = (1.98 atm) x (1.01325 x 10^5 Pa/atm) x (0.08206 L.atm/mol.K) x (347.65 K) / (101325 Pa/atm) = 0.0878 mol
Now, substituting the values of n, molar mass, and the given pressure and temperature in the formula for density, we get: density = (0.0878 mol x 28 g/mol) / (22.4 L) = 0.972 g/L
Therefore, the density of nitrogen gas at 1.98 atm and 74.5°C is 0.972 g/L.
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When moist air is heated, sensible heat is added and there is a _________ change in humidity.
When moist air is heated, sensible heat is added and there is a no change in humidity.
Moist air is a combination of dry air and water vapour. Air humidity, also known as absolute humidity or humidity ratio, is a dimensionless parameter defined as: (11.155), where Mw is the mass of water vapour carried by mass Ma of dry air.When the relative humidity of the air is high, which means the air contains a lot of moisture, the sweat evaporation process slows down. The end result? It appears to be hotter to you. If the air is extremely dry, the opposite happens.The amount of water vapor in the air is referred to as humidity. The humidity will be high if there is a lot of water vapor in the air. The higher the humidity, the wetter the weather feels outside. Humidity is usually described as relative humidity in weather reports.Learn more about humidity from here:https://brainly.com/question/22362322
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Which of the following is true about the behavior of an organism?
A.
The behavior of an organism is influenced only by the traits it inherits from its parents.
B.
The behavior of an organism is influenced only by the environment in which it lives.
C.
The behavior of an organism is not influenced by either its heredity or its environment.
D.
The behavior of an organism is influenced by both its heredity and its environment.
Answer:
C. The behavior of an organism is not influenced by either its heredity or its environment.
2 Which best describes an acid?
F
A. A soapy substance that is nonreactive
with metals
B. A neutral substance made of oppositely
charged particles
C. A caustic substance that has a high
number on the pH scale
D. A sour liquid that forms gas bubbles
when mixed with copper
D. A sour liquid that forms gas bubblee when mixed with copper
Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin scale?
The difference is .......... kelvin
Hiii
Help me pls.
Answer:
The difference is 293.15 Kelvin.
Explanation:
Given data:
Temperature difference of matter = 20°C
Temperature difference of matter in kelvin = ?
Solution;
Formula:
0°C +273.15
now we will put the values instead of 0.
20°C + 273.15 = 293.15 K
Thus, the temperature difference between two sample is 293.15 K.
draw the electron dot formula for ammonia, nh3. how many nonbonding electron pairs are in an ammonia molecule? question 27 options: a) 1 b) 3 c) 2 d) none of the above e) 6
1 nonbonding electron pairs are in an ammonia molecule.
N has 5 electrons in its valence shell
3 electrons are being used to bond with Hydrogens
2 are left
therefore, there is 1 electron pair
A chemical bond is a lasting enchantment between atoms or ions that allows the formation of molecules and crystals. The bond might also result from the electrostatic pressure between oppositely charged ions as in ionic bonds, or through the sharing of electrons as in covalent bonds.
There are 3 primary varieties of bonding: ionic, covalent, and metallic. Ionic bonding. Definition: An ionic bond is shaped whilst valence electrons are transferred from one atom to the alternative to finish the outer electron shell.
The bond between hydrogen and oxygen atoms to form water is an instance of a covalent bond.
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Balloon has a volume of 600-ml at temperature of 360 K. If the temperature of
the balloon drops to 250 K, find the volume
Answer:
V₂ ≈416.7 mL
Explanation:
This question asks us to find the volume, given another volume and 2 temperatures in Kelvin. Based on this information, we must be using Charles's Law and the formula. Remember, his law states the volume of a gas is proportional to the temperature.
V₁ / T₁ = V₂ / T₂where V₁ and V₂ are the first and second volumes, and T₁ and T₂ are the first and second temperature.
The balloon has a volume of 600 milliliters and a temperature of 360 K, but the temperature then drops to 250 K. So,
V₁= 600 mL T₁= 360 K T₂= 250 KSubstitute the values into the formula.
600 mL /360 K = V₂ / 250 KSince we are solving for the second volume when the temperature is 250 K, we have to isolate the variable V₂. It is being divided by 250 K. The inverse o division is multiplication, so we multiply both sides by 250 K.
250 K * 600 mL /360 K = V₂ / 250 K * 250 K 250 K * 600 mL/360 K = V₂The units of Kelvin cancel, so we are left with the units of mL.
250 * 600 mL/360=V₂416.666666667 mL= V₂Let's round to the nearest tenth. The 6 in the hundredth place tells us to round to 6 to a 7.
416.7 mL ≈V₂The volume of the balloon at 250 K is approximately 416.7 milliliters.
Oxygen Vacancies Enhancing Capacitive Properties of MnO2 Nanorods for Wearable Asymmetric Supercapacitors
By creating oxygen vacancies, we show how to increase the conductivity and capacitive performance of MnO2 intrinsically. The electrochemical performance of oxygen-deficient MnO2 nanorods (NRs) generated by a simple hydrogenation treatment is much better than that of the untreated MnO2 electrode.
what is an Asymmetric Supercapacitors?
The insufficient capability of energy-storage devices frequently stymies ongoing technical developments in different domains such as portable gadgets, transportation, and green energy. Asymmetric supercapacitors can extend their working voltage window beyond the thermodynamic breakdown voltage of electrolytes while solving the energy storage restrictions of symmetric supercapacitors by utilising two distinct electrode materials. This review provides in-depth expertise in this topic. To comprehend the wide-ranging research in this area, we first look at the basic energy-storage mechanisms and performance evaluation criteria for asymmetric supercapacitors.
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Which of the following is the best explanation for the fact that crushing increases the rate at which a solid dissolves in a liquid?
Select one:
a. The temperature of the solution is increased when the solid is crushed.
b. The surface area of the solute is increased when it is crushed.
c. Crushing increases the amount of solute present.
d. Crushing makes stirring the solution easier.
There are only 90 naturally occurring elements on Earth but there are millions of different substances explain how this is possible and describe how it applies to at least three examples
Answer:
See explanation
Explanation:
While it is true that there are only about 90 naturally occurring elements, these elements are capable of combining with each other to form millions of substances.
Most of the substances that we see around us today result from a combination of one or more of these naturally occurring elements.
Let us look at three examples;
The carbohydrate in food is composed of carbon, hydrogen and oxygen
The stainless steel materials we use are composed of iron, carbon and other trace elements
Glass is made up of silicon, oxygen and other elements
Only 90 naturally occurring elements capable of combining with each other to form millions of substances.
Compounds:
When two or more elements combine in a certain ratio to form a molecule.
For example-
Water is made up of two hydrogen and one Oxygen ration is 2:1.
If hydrogen and Oxygen combine inn 2:2, they for Hydrogen peroxide.
Water gives life and Hydrogen peroxide can kill a person.
Other examples are,
The carbohydrate in food is composed of carbon, hydrogen and oxygen. The stainless steel is made up of iron, carbon and other trace elements. Glass is composed of silicon, oxygen and other elements.Therefore, only 90 naturally occurring elements capable of combining with each other to form millions of substances.
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Como se consiguió el interior de un atomo
Answer:
A través del Experimento de Rutherford.
Explanation:
El experimento de la lámina de oro fue realizado en 1909 por Ernest Marsden y Hans Geiger bajo el liderazgo de Ernest Rutherford. En este experimento, se bombardeó una lámina de oro con partículas alfa y se detectó su dispersión. Se encontró que una pequeña proporción de las partículas regresan cerca de la fuente. Estos resultados fueron la base para el lanzamiento de un nuevo modelo atómico con un núcleo central cargado positivamente y con electrones cargados negativamente con pequeñas masas en relación con el núcleo y distribuidos a su alrededor.
Evidence of chemical reactions include -
light production, color change (new/different), gas production (bubbles/fizzing - not boiling), precipitate, and temperature change
no light production, color change (new/different), gas production (bubbles/fizzing - not boiling), precipitate, and temperature stays the same
color change (new/different), gas production (like when a soda is opened), precipitate, and temperature stays the same
light production, color change (like adding food coloring to water), gas production (like when a soda is opened), precipitate, and temperature change
Answer:
I think it's light production, color change (new/different), gas production (bubbles/fizzing - not boiling), precipitate, and temperature change
Answer:
light production, color change (new/different), gas production (bubbles/fizzing - not boiling), precipitate, and temperature change
Explanation:
whenever there is a chemical change, there is always bubbles, fizzing.
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I want to see how the temperature of water affects the speed of rusting. What is the Independent Variable
What is the balanced form of the chemical equation shown below?
Zn(NO3)2(aq) + Na₂S(aq) → ZnS(s) + NaNO3(aq)
The balanced chemical equation for the reaction is:
\(\displaystyle\tt Zn(NO_3)_2(aq) + Na_2S(aq) \rightarrow ZnS(s) + 2NaNO_3(aq) \)
What element reacts negatively to Au
One example of an element that can react negatively with gold is fluorine (F).
Fluorine is a highly reactive nonmetal and the most electronegative element on the periodic table. It readily accepts electrons to achieve a stable electron configuration.
When fluorine reacts with gold, it can form a compound known as gold trifluoride (AuF3). Gold trifluoride is a yellow solid that is thermodynamically unstable and decomposes at room temperature.
The reactivity of fluorine towards gold is attributed to the large electronegativity difference between the two elements. Fluorine's strong electron affinity and high electronegativity allow it to oxidize gold by accepting electrons from the gold atoms. This results in the formation of AuF3.
It's important to note that the reactivity of gold with fluorine is relatively uncommon and occurs under specific conditions. Gold's unreactive nature is one of the reasons it is highly valued and widely used in jewelry, electronics, and various other applications.
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Choose all that apply below to DNA:
Question 1 options:
contains guanine
contains thymine
contains uracil
contains cytosine
takes the original code out of the nucleus and translate it into proteins
contains adenine