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Thermal energy is heat it heats you up it give people heat it give away the heat it has until it is cold
Either you miswrote that or something else
Related Questions
Balance the equations by putting the necessary coefficients in the blanks. Normally we do not write 1s when balancing, but for this particular question you need to include them for full credit. __Na3N___ Na +__ N2 ___H3PO4 + __ KOH __K3PO4 + __ H2O __ N2 +__ H2 __ NH3 __H2O2 __ O2 + __ H2O __ Zn + __ HCl __ ZnCl2 + __H2 __ C2H6 + __ O2 __ CO2 + __H2O __ CuCl2 + __H2S __ CuS + __HCl
Answers
Balancing a chemical equation is the process of ensuring that the number of atoms of each element in the reactants is equal to the number of atoms of that same element in the products.
Balance the chemical eqations given in the problem?
Na3N → 3 Na + ½ N2H3PO4 + 3 KOH → K3PO4 + 3 H2ON2 + 3 H2 → 2 NH3H2O2 → O2 + 2 H2OZn + 2 HCl → ZnCl2 + H2C2H6 + 7/2 O2 → 2 CO2 + 3 H2OCuCl2 + H2S → CuS + 2 HClChemical equations are used to describe the reactants and products in a chemical reaction. These equations are written using chemical formulas and symbols, indicating the types and numbers of atoms or molecules involved in the reaction. However, these equations must be balanced to obey the law of conservation of mass, which states that the total mass of the reactants must equal the total mass.
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A compound has a similar molecular mass of 180grams/mol. It contains 40.8% carbon,5.8% hydrogen and 53.4% oxygen. Calculate its empirical formula and molecular formula, and give its common name.
Answers
Answer:
To find the empirical formula of the compound, we need to determine the simplest whole-number ratio of atoms in the molecule.
First, we can assume that we have 100 grams of the compound, and calculate the number of moles of each element present in it:
Carbon: 40.8 g / 12.011 g/mol = 3.398 mol
Hydrogen: 5.8 g / 1.008 g/mol = 5.753 mol
Oxygen: 53.4 g / 15.999 g/mol = 3.337 mol
Next, we divide each of these values by the smallest one, which is 3.337, to get the mole ratio:
Carbon: 3.398 mol / 3.337 mol = 1.019
Hydrogen: 5.753 mol / 3.337 mol = 1.723
Oxygen: 3.337 mol / 3.337 mol = 1.000
Rounding these values to the nearest whole number, we get the empirical formula: C1.0H1.7O1.0, which can be simplified to CH1.7O.
To find the molecular formula, we need to know the actual molecular mass of the compound. We can estimate it by adding the atomic masses of the elements in the empirical formula:
Carbon: 1 x 12.011 = 12.011
Hydrogen: 1.7 x 1.008 = 1.714
Oxygen: 1 x 15.999 = 15.999
Total = 29.724 g/mol (approx.)
The molecular mass is close to 180 g/mol, which suggests that the actual molecular formula is a multiple of the empirical formula. Dividing 180 by 29.724, we get a value of about 6.05. Multiplying the subscripts in the empirical formula by this value, we get the molecular formula: C6H10.2O6, which can be further simplified to C3H5.1O3.
The compound with the empirical formula CH1.7O and the molecular formula C3H5.1O3 is commonly known as glyoxylic acid.
Your weather app reports the actual temperature as 34°F but the temperature on the thermometer outside is 35°F. What is the percent error of the recorded temperature (absolute error = ±1°F).
Answers
The percentage error of the recorded temperature is 2.9%
Formula for percentage errorPercentage error = (absolute error / actual measurement) × 100
Data obtained from the questionThe following data were obtaned from the question:
Actual temperature reading = 34 °FThermometer reading = 35 °FAbsolute error = 1 °FPercentrage error =?How to determine the percentage errorThe percentage error of the recorded temperature can be obtained as follow:
Percentage error = (absolute error / actual measurement) × 100
Percentage error = (1 / 34) × 100
Percentage error = 2.9%
Thus, the perecentage error of the recorded temperature is 2.9%
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24. The Henry’s law constant for O2 is 1.3 × 10−3 M/atm at 25 °C. Assuming ideal solution behavior, what mass of oxygen, in grams, would be dissolved in a 40. L aquarium at 25 °C, assuming an atmospheric pressure of 1.00 atm, and that the partial pressure of O2 is 0.21 atm?
Please enter your answer with two sig figs, no units, no scientific notation.
Explain please <3
Answers
The aquarium has 0.35 g of dissolved oxygen in it.
What is mass?The quantity of matter in an object is expressed in terms of mass. It is a scalar number, and units like grams, kilograms, and pounds are used to measure it. Weight, the force of gravity acting on an object, is not the same as mass. An object's mass is a fundamental characteristic that exists regardless of where it is or the gravitational environment it is in.
How do you determine it?Henry's law, which connects the concentration of a gas in a solution to its partial pressure, can be used to determine the mass of oxygen (O2) that would be dissolved in a 40 L aquarium:
C = kH x P
where P is the partial pressure of the gas, kH is the Henry's law constant, and C is the concentration of the gas in the solution.
To solve the concentration by rearranging the equation, we obtain:
C = (kH x P)
Using the above values for kH and P, we obtain:
C = (1.3 10^-3 M/atm) x (0.21 atm) = 2.73 10^-4 M.
This indicates that the aquarium's dissolved oxygen concentration is 2.73 x 10^-4 M.
We can use the following equation to determine the mass of O2 dissolved in the aquarium:
Mass = concentration x volume x molar mass.
where O2 has a molar mass of 32 g/mol.
Inputting the values provided yields:
mass = (2.73 x 10^-4 M) x 40 L x 32 g/mol = 0.35 g
As a result, the aquarium has 0.35 g of dissolved oxygen in it.
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Which of the following is not part of the nucleus?
A. Ribosome
B. Chromosome
C. Nucleus
D. Gene
Answers
I believe the answer is Ribosome
The partial negative charge at one end of a water molecule is attracted to the partial positive
charge of another water molecule. This attraction is called:
A. A covalent bond
B. a hydrogen bond
C. an ionic bond
Answers
Answer:
Hydrogen Bond
Explanation:
Hydrogen bond interactions are formed between the hydrogen atom bonded to most electronegative atoms (i.e. F, O and N) of one molecule and most electronegative atom (i.e. F, O and N) of another molecule.
In this interaction the hydrogen atom has partial positive charge and electronegative atom has partial negative charge.
Which of the following is NOT likely to cause a change in average annual temperatures on Earth?
a. Human activity. b. Solar eclipses.
c. Photosynthesis by plants and algae. d. Strength of solar radiation.
Answers
Answer:
i think C is the answer
Explanation:
The change in average annual temperatures on earth will be due to "photosynthesis by plants and algae".
What is photosynthesis?Photosynthesis can be defined as a process in which plants, as well as other organisms, as well as other organisms, utilize to transform sunlight into chemical energy which can then be released to power the organism's activities using cellular respiration.
What is plants?
Plants seem to be mostly photosynthetic eukaryotes belonging to the plantae kingdom.
Therefore, photosynthesis cannot change in average annual temperature on Earth.
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Explain why the average atomic masses of the elements listed in the periodic table usually are not whole numbers.
Answers
The atomic weight is the average mass of all of an element's isotopes (isotopes are atoms of the same element with the same number of protons but a different number of neutrons, and protons + neutrons = atomic mass.
Each isotope of an element has a whole number of protons and neutrons, but the atomic weight is the average of all the isotopes found, and it is affected by the observed ratios of the different isotopes. If the number was a whole number, then no known isotopes have been found (rare other than some man-made elements).
Short answer: The reason the atomic mass is not a whole number is because it's the weighted average mass of the isotopes of that specific element.
Because the atomic mass is a calculated average of all the Isotopes of an Element with their % of which they occur also calculated in.
The atomic mass of an element is the average mass of all its isotopes, weighted by their abundance. For example, the mass of Carbon is given as 12.011, since Carbon 12 is by far the most abundant, but Carbon 14 also exists, shifting the average mass slightly above 12.
Which statements about exothermic and endothermic reactions are correct? (its a multiple choice question)
1 During an exothermic reaction, heat is given out.
2 The temperature of an endothermic reaction goes up because heat is taken in.
3 Burning methane in the air is an exothermic reaction.
A) 1.2 and 3
B) 1 and 2 only
C) 1 and 3 only
D) 2 and 3 only
Answers
Answer:
C)1 and 3 only☺️
Explanation:
The decomposition of HI(g) at 298 K is represented by the equilibrium equation above. When 100. torr of HI(g) is added to a previously evacuated, rigid container and allowed to reach equilibrium, the partial pressure of I2(g) is approximately 3.7 torr. If the initial pressure of HI(g) is increased to 200. torr and the process is repeated at the same temperature, which of the following correctly predicts the equilibrium partial pressure of I2(g), and why?
answer choices
PI2 ≈ 14 torr, because it is directly proportional to the square of the initial pressure of HI.
PI2 ≈ 0.073 torr, because it is inversely proportional to the square of the initial pressure of HI.
PI2 ≈ 7.4 torr, because it is directly proportional to the initial pressure of HI.
PI2 ≈ 1.9 torr, because it is inversely proportional to the initial pressure of HI.
Answers
7.4 torr for PI2. Due to its direct proportionality to the initial pressure of HIHI, PI2 7.4 torrs.
The forward and reverse reactions happen simultaneously when the system is in equilibrium. Each reactant and product are present in equal amounts once equilibrium has been attained. The relationship between the concentrations of the reactants and the products is mathematically represented by the equilibrium constant equation.
The equilibrium state is the state of a system whose attributes are constant under constant external conditions. Even after equilibrium has been reached, reactants and products continue to change, making chemical equilibria dynamic in nature. However, the reaction time for moving forward and backward is the same. Balance examples include Placed on the table was a book. a vehicle that travels at a fixed speed. a chemical process where the rates of the forward and reverse reactions are equivalent.
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The image shows a ship using sonar to locate a school of fish. Which data are used to determine the distance of the ship from the fish? O A. The amount of time it takes the sound waves to travel from the boat to the fish B. The number of sound waves that bounce off the fish C. The number of sound waves the ship emits D. The amount of time it takes the sound waves to travel to the fish and back to the boat
Answers
The factor that would help to determine the distance of the ship from the fish would be The amount of time it takes the sound waves to travel to the fish and back to the boat.
What is distance traveled by a wave?This is the term that is used to refer to the total distance that would be traveled by a wave in a given cycle. The distance is usually calculated by the use of lambda. The use of Sonar would have to be determinant on the sound that is being heard.
We would have to check the way that the sound would have to come from the ship and then the way that it would have to be go back to the given boat that is used to report and find the school of fisn.
Hence we would say that The factor that would help to determine the distance of the ship from the fish would be The amount of time it takes the sound waves to travel to the fish and back to the boat.
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Ash, dust, pollen, and tiny bits of salt from water are all examples of
Science btw
Answers
Answer:
Particulate
Explanation:
Ash, dust, pollen, and tiny bits of salt from water are all examples of particulate
What is the Ea for the exothermic reaction on the right A) 268.74 kJ B) -171.08 kJ C) 88.00 kJ D) -259.09 kJ
Answers
Answer:
Option C. 88 KJ
Explanation:
The activation energy (Ea) is the minimum energy that reactant must overcome in order for them to proceed to product.
In an energy profile diagram, the activation energy (Ea) is obtained by calculating the difference between the energy of the activation complex (i.e peak) and the energy of the reactant.
With the above information, we shall determine the activation energy (Ea) of the reaction above as follow:
Activation complex = 268.74 KJ
Energy of reactant = 180.74 KJ
Activation energy (Ea) =?
Activation energy = Activation complex – Energy of reactant
Activation energy = 268.74 – 180.74
Activation energy = 88 KJ
Therefore, the activation energy (Ea) of the reaction is 88 KJ
Answer:
88.00 kJ
Explanation:
The number of moles of Cr deposited by passing 1,5 F electricity in following reaction Cr+3e–– ›cr is
Answers
The number of moles of Cr deposited by 1.5 F of electricity is 0.5 moles
What is electrolysis?The term electrolysis has to do with thee deposition of a solid when a direct current is passed through its solution.
Given the reaction; Cr3+(aq) + 3e ––›Cr(s)
If 3F of electricity is required to deposit 1 mole of Cr
1.5F of electricity is required to deposit 1.5F * 1 mole/3F
= 0.5 moles
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If you weigh a sample of Magnesium metal to be 45g, how many moles do
you have?
Answers
Answer:
\(\boxed {\boxed {\sf 1.9 \ moles \ Mg}}\)
Explanation:
To convert from grams to moles, the molar mass is used. This tells us the grams in 1 mole of a specific substance. It can be found on the Periodic Table.
Magnesium (Mg): 24.305 g/molUse the molar mass as a ratio.
\(\frac { 24.305 \ g \ Mg}{1 \ mol \ Mg}\)
Multiply by the given number of grams.
\(45 \ g \ Mg *\frac { 24.305 \ g \ Mg}{1 \ mol \ Mg}\)
Flip the fraction so the grams of magnesium can cancel.
\(45 \ g \ Mg *\frac {1 \ mol \ Mg }{24.305 \ g \ Mg}\)
\(45 *\frac {1 \ mol \ Mg }{24.305 }\)
\(\frac {45 \ mol \ Mg }{24.305 }\)
\(1.85147089076 \ mol \ Mg\)
The original measurement of grams has 2 significant figures, so our answer must have the same.
For the number of moles we calculated, that is the tenth place. The 5 in the hundredth place tells us to round the 8 to a 9.
\(1.9 \ mol \ Mg\)
45 grams of magnesium is about 1.9 moles.
How many moles of aluminum ions al3+ are present in 0.42 mol of al2so43
Answers
There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.
To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.
The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.
Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:
Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)
Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2
Moles of Al3+ = 0.84 mol Al3+
Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.
It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.
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What is the molarity of an HCl solution if 25.0 mL of this solution required 17.80 mL of 0.108 M NaOH to reach the end point in a titration?
Answers
Answer:
\(\boxed {\boxed {\sf 0.0769 \ M}}\)
Explanation:
We are asked to find the molarity of an acid given the details of a titration experiment. The formula for titration is as follows:
\(M_AV_A= M_B V_B\)
In this formula, M is the molarity of the acid or base and V is the volume of the acid or base. The molarity of the hydrochloric acid (HCl) is unknown and the volume is 25.0 milliliters.
\(M_A * 25.0 \ mL = M_BV_B\)
The molarity of the sodium hydroxide (NaOH) is 0.108 molar and the volume is 17.80 milliliters.
\(M_A * 25.0 \ mL = 0.108 \ M * 17.80 \ mL\)
We are solving for the molarity of the acid and we must isolate the variable \(M_A\). It is being multiplied by 25.0 milliliters. The inverse operation of multiplication is division, so we divide both sides of the equation by 25.0 mL.
\(\frac {M_A * 25.0 \ mL }{25.0 \ mL}= \frac{0.108 \ M * 17.80 \ mL }{25.0 \ mL}\)
\(M_A= \frac{0.108 \ M * 17.80 \ mL }{25.0 \ mL}\)
The units of milliliters cancel.
\(M_A= \frac{0.108 \ M * 17.80 }{25.0 }\)
\(M_A= \frac{1.9224}{25.0 } \ M\)
\(M_A= 0.076896 \ M\)
The original measurements have 3 and 4 significant figures. We must round our answer to the least number of sig figs, which is 3. For the number we calculated, that is the ten-thousandth place. The 9 to the right of this place tells us to round the 8 up to a 9.
\(M_A \approx 0.0769 \ M\)
The molarity of the hydrochloric acid is 0.0769 Molar.
\( \sf{\blue{«} \: \pink{ \large{ \underline{Q\orange{U} \red{E} \green{S} \purple{TI} \pink{{ON}}}}}}\)
What is the difference between an acid and a base? Provide examples of each.
Answers
Answer:
An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance. A base is a molecule or ion able to accept a hydrogen ion from an acid.
Answer:
Acids::1.Sour in taste
2. Tum blue litmus into red
3. Acids change methyl orange to red
4.Phenolphthalein remains colourless
5. Acids do not give soapy touch
6. Give hydrogen ions in solution
Bases::Bitter in taste
Bitter in tasteTurn red litmus blue Bases change methyl orange to yellowPhenolphthalein gives pink colour Soapy to touchGive hydroxyl ions in solution if it helped uh please mark me a BRAINLIEST :-))1. Calculate the number of moles of oxygen atoms present in 1.50 mol of barium sulfate.
Answers
Answer:
\(n_O=6.00molO\)
Explanation:
Hello.
In this case, since the molecular formula of barium sulfate is:
\(BaSO_4\)
Which has four oxygen atoms, we can also say that one mole of barium sulfate has four moles of oxygen; in such a way, the moles of oxygen atoms in 1.50 moles of barium sulfate are:
\(n_O=1.50molBaSO_4*\frac{4molO}{1molBaSO_4} \\\\n_O=6.00molO\)
Best regards.
thsof
is which acid H2S04
Answers
Explanation:
H2So4=sulphuric acid , strong acid
Order frome largest to smallest
Allele,
Chromosome,
DNA,
nucleus of a cell
Answers
how would you confirm the presence of lead in an ore?
Answers
There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.
The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.
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The half-life of a radioactive isotope is 27 years. How long will its
mass take to fall from 2.00 g to 0.25 g?
years.
Answers
Life will come out to be 10 days. This is the required value of half life.
what is radioactive isotope?
An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radionuclide. Radioactive isotopes have many useful applications. In medicine, for example, cobalt-60 is extensively employed as a radiation source to arrest the development of cancer. Other radioactive isotopes are used as tracers for diagnostic purposes as well as in research on metabolic processes.Atoms of the same element with different numbers of neutrons are called isotopes. Many elements have one or more isotopes that are radioactive. Their nuclei are unstable, so they break down, or decay, and emit radiation.To learn more about isotope refers to:
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The ratio of the mass of O
to the mass of N
in N2O3
is 12:7. Another binary compound of nitrogen has a ratio of O
to N
of 16:7.
What is the ratio of O
to N
in the next member of this series of compounds?
Answers
much for the invite too but i just got home from work and i woke up N:14
Which of the following can exhibit hydrogen bonding (select all that apply)? CH4, CH3NH2, HF, H2O
Answers
For this lab we used an analogy of a pet adoption to help you understand the parts of the collision theory. Match the vocabulary word from collision theory to what was happening at the pet adoption.
Answers
The vocabulary word from collision theory to what was happening at the pet adoption.
Reactants - The foster family with the pet and the adoptive family entering the park alone
Products - The adoptive family with their new pet and the foster family petless
What is the collision theory all about?Collision theory says that for a chemical reaction to happen, the reactant molecules must come in contact with each other with enough energy and with all things being equal or in sync. The rate of the reaction is proportional to the number of collisions that occur.
The other answers are:
Temperature - More adoptions happen in the summer than in the winter.
Surface Area - The foster families started in a solid block, but decided to spread out in the park.
Concentration - Once the foster families spread out, they were able to invite more foster families to the event
Catalyst - The foster families and adoptive families would sit together at a picnic table to meet the pet and fill out paperwork.
Activated Complex - Meeting between foster families and adoptive families to meet the pet and fill out paperwork
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what is isotope
I will mark you
Answers
An isotope is a chemical element that has the same number of protons and electrons, but has a different number of neutrons.
What is the product(s) of the reaction below? 2Al(s) + Fe2O3(s)  Al2O3(s) + 2Fe(s)
Answers
Answer:
Solid aluminum oxide and solid iron
Check it in the attachment....
pls mark the brainliest!
what is the functional group
Answers
As you can see from -COOH
Please help me this is a big grade please
Answers
Answer:
water
Explanation:
because the others are in compounds and can not be considered as products lonely.