are you chemistry because you just blew up my heart
Answer:
i needed that lol
thank you
Explanation:
Many metals react with acids to produce hydrogen gas. A certain reaction produces 32.6 L of hydrogen gas at STP. How many moles of hydrogen were produced? *
22.4 mol
1.46 mol
730 mol
16.3 mol
Answer:
1.46 mol of H₂
Explanation:
This easy question can be solved by a rule of three.
At STP conditions, we know that 1 mol of any gas is contained in 22.4L.
So let's make the operation:
22.4L is the volume for 1 mol of any gas, at STP
32.6 L may be the volume for (32.6 . 1) /22.4 = 1.46 moles.
We can also apply, the Ideal Gases Law.
At STP conditions, Temperature is 273.15 K and pressure is 1 atm
P . V = n . R . T
n = (P . V) / R. T → (1 atm . 32.6L) / (0.082 . 273.15K)
n = 1.455 mol
what is a pure substance?
Answer:
A pure substance is a substance or an element whose impurities are extracted by concentration by chemical means.
e.g Aluminium is made pure by concentration of it's ore, bauxite by treatment with excess Sodium Hydroxide solution.
what is glue made up of
Answer:
Glue is made up of - combination of polyvinyl acetate (PVA), water, ethanol, acetone and other substances. The animal remains that are the raw materials for glue may include ears, tails, scraps of hide or skin, scrapings from the fleshy sides of hides, tendons, bones and collagen taken from animal parts, particularly horse hooves and bones.
Explanation:
Oof hope this helps =)
Answer:
Synthetic glues and adhesives are made from polyvinyl acetate, water, ethanol, acetone and some other substances. The water is used to modify the glue's consistency while the other substances are used to control the drying rate of the glue.
Can anyone list me all the 8 groups of the periodic table , going in order of course?
Answer:
alkali metals
alkali earth metals
transition metals
non metals
noble gases
halogens
rare earth metals
Explanation:
How many atoms are in 24.23 moles of Pb?
Answer: There are 3.3×1023atoms in 0.54 moles Pb. Explanation: To calculate the number of atoms in Pb, we use Avogadro's number,
Explanation:
What is a solution?
a
a homogeneous mixture with particles between .01 and 1 nm
b
a homogeneous mixture with particles smaller than .01nm
c
a heterogeneous mixture with particles between .01 and 1 nm
d
a heterogeneous mixture with particles smaller than .01nm
determining the molecular formula of a hydrocarbon with a relative molecular mass of 54
Answer:
C₄H₆
Explanation:
A hydrocarbon is a molecule that only contains atoms of Carbon and Hydrogen. As you remember, the molar mass of Carbon is 12g/mol and the molar mass of Hydrogen is 1g/mol.
To solve this question we can find the amount of Carbons necessary that doesn't exceed the 54g/mol. That is:
54g/mol / 12g/mol = 4.5
As the molecular formula must be given in whole numbers, the amount of Carbons is 4. This 4 carbons have a mass of:
12g/mol*4 = 48g/mol
And the hydrogens necessaries to suply the molecular mass are:
54 - 48 = 6 hydrogens
That means molecular formula is:
C₄H₆You have 1 1/2 moles of 1 kg bottles of O2. What is the mass of O2 that you have?
A. 9.033x10^23 kg
B. 9.033x10^23 atoms
C. 1.80x10^27 kg
D. 1.806x10^24 moles
It is not B as I have already tried it :(
Answer:
A: 9.033 × 10^(23) kg
Explanation:
According to avogadro's number, we know that;
1 mole = 6.022 × 10^(23) kg
Thus;
1½(1.5) mole of O2 will produce;
(1.5 × 6.022 × 10^(23))/1 = 9.033 × 10^(23) kg
Looking at the options, the correct one is Option A.
In a separate location, take notes from the sources you’ve identified. The notes will provide details for your paper. While taking notes, you may want to use these reading strategies. Use these sources if you find them helpful: Using your notes, compare the features of analog and digital signals in the table provided. Include one to three points for each feature and type of signal.
Answer:
Here is every answer for analog and digital (in order)
Analog:
Signal Shape: Smooth and continuousNumerical Values for Signal Measurements: Analog signals represent one continuous variable as the result of another continuous time-based variable. They are capable of outputting continuous information with a theoretically infinite number of possible values.Amount of Data that can be transmitted: analog circuits can conduct only fairly low-speed data communications. The maximum data rate over an analog facility is 33.6K bps when there are analog loops at either end. With 56K bps modems, only one end of the loop can be analog. The other end of the connection has to be digital. Energy requirements: light, sound, temperature, position, and pressurePrivacy and security (ability of the signal to be encoded in a secret code): not encryptedClarity of Signal: noise affects clarity and quality, noise is amplified, amplified noise causes more random information in the signal, signal bandwidth is lowDigital (in order):
Signal shape: stepping, square, and discreteNumerical Values for Signal Measurements: digital communication methods transmit a complete measured value, in other words both a numeric value and a unit of measurement Amount of data that can be transmitted: First of all, it is theoretically possible to transmit digital signals directly. Unfortunately when we use capacitors and inductors (energy storage devices) to match the impedance from the transmitter to the air (low impedance transistor say 5 ohms to 388 ohms (air)) these components introduce a bandwidth limiting match. Since all impulse functions have infinite bandwidth (transmitting a 1 and a zero) the bandwidth of the transceiver must be multi octave in order to have any reasonable efficiency. Systems engineers simplify the problem by introducing direct sequence modulation where a carrier is modulated 0/180 degrees dependent on the data rate.Energy requirements: voltage, accoustic pressure, and magnetization of a magnetic storage mediaPrivacy and security: encryptedClarity of signal: noise is lower in amplitude, electronics can ignore the noise, quality of signal is maintained, signal is highExplanation:
I did mine in bullet points, hopefully this helped!
Analog:
Signal Shape: Smooth and continuous
Numerical Values for Signal Estimations: Analog signals speak to one ceaseless variable as the result of another ceaseless time-based variable.
Amount of Information that can be transmitted: analog circuits can conduct as it were reasonably low-speed information communications.
Energy necessities: light, sound, temperature, position, and pressure Privacy and security : not encrypted
Clarity of Signal: clamor influences clarity and quality, commotion is amplified,
Digital:
Signal shape: stepping, square, and discrete
Numerical Values for Signal Measurements: digital communication methods transmit a complete measured value, in other words both a numeric value and a unit of measurement
Amount of data that can be transmitted: First of all, it is theoretically possible to transmit digital signals directly.
Energy requirements: voltage, accoustic pressure.
Privacy and security: encrypted
Clarity of signal: noise is lower in amplitude, electronics can ignore the noise, quality of signal is maintained, signal is high
Analog and digital is :Analog signal could be a continuous signal which speaks to physical estimations.
Digital signals are discrete time signals created by computerized balance.
Example :Human voice in discuss, analog electronic gadgets. Computers, CDs, DVDs, and other advanced electronic gadgets.
What volume of a 40.0 % by volume acetone solution can be
made with 20.0 mL of acetone?
Answer:
50 milliliters of acetone solution
Explanation:
If a solution is 40% by volume of acetone, then we have 40 mL of acetone in a 100 mL solution. So if we have 20 mL of acetone, we get: 100 mL solution 40 mL ( CH3) 2CO⋅
20mL (CH3) 2CO =50mL solution
The volume percent of 40% indicates that 40 ml of acetone is present in 100 ml solution. Then, 20 ml acetone can be made into 50 ml solution.
What is volume percentage ?Volume percentage is a common term used to express the concentration of a solution. Volume percentage of a solution is the ratio of the volume of the solute to the volume of the solvent multiplied by 100.
The volume percentage of the solution measures how much volume of the solute is present in 100 ml of the solution. Thus a 50% by volume solution is 50 ml solute in 100 ml solution.
Given that volume percentage of acetone = 40%.
that is 40 ml of acetone is present in 100 ml of the solution.
Therefore, the volume of the solution containing 20 ml of acetone is :
(20 × 100)/40 = 50 ml.
Therefore, 50 ml of 40% by volume o solution can be made by 20 ml of acetone.
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You use 50.00 mL of a 12.0 M solution of HCl solution to make a 500.00 mL solution. What is the concentration of the new solution? *
Answer:
1.2 M
Explanation:
If you use the dilution equation (M1V1=M2V2), you end up with (50)(12)=(500)(M2), and when you solve for M2 you get 1.2 M.
How many atoms are in 14 moles of I? Watch your significant figures.
A. 8.4 x 10^24 atoms of l
B. 8.43 x 10^24 moles of l
C. 8.4 x 10^23 atoms of I
D. 8.43 atoms of l
Answer:
8.43 x 1024 moles of I
Explanation:
BRAINLIEST IF EXPLANATION IS GIVEN AND ANSWER IS CORRECT:
How much energy is required to raise the temperature of 15.6 grams of ice from -8.76 degrees Celsius to 85.9 degrees Celsius? Use 3 sig figs.
Answer:
Q = 2997.69 J
Explanation:
Given that,
The mass of ice, m = 15.6 grams
The temperature increases from -8.76 degrees Celsius to 85.9 degrees Celsius.
The specifc heat of ice is 2.03 J/g°C
We need to find the amount of energy required. The formula for energy required is given by :
[tex]Q=mc\Delta T\\\\=15.6\times 2.03\times (85.9-(-8.76))\\\\=2997.69\ J[/tex]
So, the required heat is equal to 2997.69 J.
Can someone help me with this question.
I’ll mark brainliest
Answer:
sodium carbonate im pretty sure (the formula is Na2CO3)
Explanation:
hope this helps :))
How does every single cell in the body get the substances it needs to carry out the chemical reaction that provides it energy?
What is the density of a block of wood with a volume of 16.5 ml and mass of 6.39g?
Answer:
0.38
Explanation:
The formula for finding density is mass/volume. So the equation becomes 6.39/16.5 which gives you 0.38
Chemistry Questions
5) What is matter? Mention the characteristic of particles of matter.
Answer:
As known matter is anything that occupies space and has mass.
PLEASE HELP!!
Which statement describes the first step in soil formation?
A: Small, simple plants begin to grow.
B: Parent rock breaks into smaller pieces.
C: Humus begins to mix with sediment.
D: Organic material starts decomposing.
Answer:
B: Parent rock breaks into smaller pieces.
Explanation:
Weathering the first step in the process of soil formation. The process of breaking up off the parent rocks into simple forms, is termed as weathering. The formation of soil is a very gradual and slow process. It takes millions of years for the rocks to become soil. The dead and decaying matter of plants and animals are also included in the rocks. Water, sun, climatic conditions and rain are some of the factors that effect weathering.
Answer:
32
Explanation:
I found it
What is the density of 1.00 mol of carbon monoxide gas at STP?
Answer:
Density = mass / volume.
If this is an ideal gas then 1mol will take up 22.4L of volume (fact about ideal gases you should remember)
Since you have 1mol then you know the volume of the gas that you have (22.4L)
Now, just convert 1mol of CO to grams.The ptable tells you that the mass of 1 mol of C is 12g and the mass of 1 mol of O is 16g. So the mass of 1 mol of CO is......... :):)
Now you have the mass and the volume, so just divide :) enjoy
.Which best describes the structure of 2-butene?
A. a four-carbon hydrocarbon with a double bond between the second and third carbon atoms
B. a four-carbon hydrocarbon with a branching point at the second carbon atom in the chain
C. a four-carbon hydrocarbon with a double bond between the first and second carbon atoms
Answer:
A.
Explanation:
The 2 - butene is an alkene with the formula C4H8, which can be used as the polybutene monomer or co-polymer. It is a compressed liquefied gas colorless, highly flammable characteristic odor. Prolonged exposure to this gas can cause frostbite causing a lowering of consciousness. Its formula is C4H8 and it is made up of 4 carbon atoms.
The best structure that describes 2-butene is that of Option A.
How many grams of C3H8
must be used to produce
3.75 X 1024 molecules of CO2 gas?
C3H8 + 5O2 → 3CO2 + 4H2O
Answer:
91.28 g
Explanation:
The mass of C₃H₈ used is 91.08g
What is Mole?
The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Molecules of carbon dioxide = 3.75 × 10²⁴
We know that,
1 mole = 6.023 × 10²³ molecules
Moles of carbon dioxide = 3.75 × 10²⁴ ÷ 6.023 × 10²³
= 6.226 moles
From the reaction, 3 moles of carbon dioxide is produced by 1 mole of C₃H₈.
So, 6.226 moles will be produced by (1 ÷ 3) × 6.226
= 2.07 moles of C₃H₈
Mass of C₃H₈ = moles × molar mass
= 2.07 × 44
= 91.08g
Therefore, mass of C₃H₈ used is 91.08g
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HELPPPP FASTTT! 4. Which is more electronegative?
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
Explain Your Answer Choice
Answer:
D.lodine
Explanation:
Lodine is a nonsteroidal anti-inflammatory drug . It works by reducing hormones that cause inflammation and pain in the body. Lodine is used to treat mild to moderate pain, osteoarthritis, or rheumatoid arthritis.
I hope it's helpful for you......
1. Friction acts in a direction
to the
direction of an object's motion.
a. unrelated
b. opposite
c. equal
d. perpendicular
Friction acts in the opposite direction to the direction of an object's motion. Therefore, option (b) is correct.
What is Friction?Friction can be defined as the resistance provided by the surfaces that are in contact when they pass over each other. Friction offers the traction that is required to walk without slipping.
Friction can be described as a force that is dependent on external factors. Friction depends upon the nature of the two surfaces that are in contact and on the smoothness or roughness of the two contacted surfaces. When one body moves over the surface of another, these irregularities on the surface of the bodies get entangled and develop friction.
Friction depends upon the force that is exerted on these surfaces and increases when the force is applied along with the irregularities. Types of Friction are Rolling friction, Static friction, Sliding friction, and Fluid friction.
The force of friction acts in the opposite direction to the direction of an object's motion.
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1. A student performed the titration as in this experiment. He transferred a 2.00 mL sample of the
acid into a flask, diluted it with water, and then began to add sodium hydroxide solution from the
buret. After adding 50 mL of NaOH solution, the sample in the flask still had not turned pink.
What error did the student make?
Answer:
The student shouldn't have added water to the acid.
Explanation:
The aim of titration is to standardize an unknown solution. Recall that a standard solution is one whose concentration is known.
After the acid has been prepared, it has a particular concentration. The student should't have diluted it further. The further dilution of a small volume of acid drastically reduces the concentration of the acid to such low value that the H^+ ions present are insufficient to react with the OH^- from base in order to turn the solution to pink.
1)
Two locations, one in northern Canada and one in the southwestern United States, receive
the same amount of precipitation each year. The location in Canada is classified as a humid
climate. Why would the location in the United States be classified as an arid climate?
A)
The soil-moisture storage in the southwestern United States is more than that in northern
Canada.
B)
The vegetation of the southwestern United States is different from that of northern
Canada,
C)
The potential evapotranspiration is greater in the southwestern United States than in
northern Canada
D)
The yearly distribution of precipitation is different.
At 40 degrees Celsius , 100 grams of NaClO3 is added to 100 grams of water. The solution would be ..
a.) saturated
b.)unsaturated
c.) saturated with excess
d.) supersaturated.
What is the main need or want the wave technology shown meets?
Answer: To efficiently communicate with others
Explanation:
this was the right on answer for me might be different for others
The main need or want the wave technology shown meets to see objects surrounding more clearly.
What is wave technology ?It is a floating device that operates in the same direction as the waves. With the use of the technology, energy may be captured even from relatively small waves. The device that is moved by waves activates a hydraulic system that can power a generator. The tube segment contains all the generation equipment and systems.
Early mechanization (1770s to 1830s), steam power and railroads (1830s to 1880s), electrical and heavy engineering (1880s to 1930s), Fordist mass production (1930s to 1970s), and information and communication are the five waves that have so far slammed into our society (1970s to 2010s).
Wave energy, also known as wave power, is the energy that ocean surface waves carry and absorb. The energy is then put to use in a variety of productive ways.
Thus, The main need or want the wave technology shown meets to see objects surrounding more clearly.
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An example of a non-electrolyte is
1. H2O (I)
2. NaCl (aq)
3. K2SO4 (aq)
4. HCI (aq)
Answer: H2O
Explanation: pure H2O does not contain ions which could
Transfer charge. Other substances in water solution forms ions.
What is the specific heat of ethanol if 4650 j are required to raise the temperature of 250.0g of ethanol from 22.0oc to 29.6 degrees Celsius
Answer:
[tex]C=2.45\frac{J}{g\°C}[/tex]
Explanation:
Hello there!
In this case, since the thermodynamic definition of heat in terms of mass, specific heat and temperatures is given by:
[tex]Q=mC(T_2-T_1)[/tex]
We are to calculate the specific heat of the ethanol as shown below:
[tex]C=\frac{Q}{m(T_2-T_1)}[/tex]
Thus, by plugging it the given data we can obtain:
[tex]C=\frac{4650J}{250.0g(29.6-22.00\°C)} \\\\C=2.45\frac{J}{g\°C}[/tex]
Regards!