Answer:
what is the question?
Which geological process occurs over the longest time scale?
Select one:
Earthquakes
Volcanic eruptions
Weathering
Landslides
Answer: weathering
Explanation: It is slowly by wind or by water
In the combustion reaction between propane and oxygen gas, if 44.0 g of propane is burned
in 160.0g of oxygen. How many total grams of products will be formed if the Law of
Conservation of Mass is fulfilled?
A.116.0g B.126.0g C.204.0g D.214.0g
275 L of krypton gas is held at 225 K. What is the volume when the temperature is increased to 500.K?
124 L
611 L
500. L
409 L
Answer:
The temperature increases from 293 K to 313 K. It follows that the volume increases and the . T . factor must be greater than 1. We can visually summarize the Charles’s law solution as follows: Conceptual Solution. A 275 L helium balloon is heated from 20 °C to 40 °C. Calculate the final volume assuming the pressure remains constant.
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Explanate
in the balanced chemical reaction shown below, what is the molar ratio of O2 to H2O
C3H8(g) + 5O2(g)—> 3CO2(g) + 4H2O(g)
A. 4:3
B. 3:1
C. 5:4
D: 5:3
the molar ratio of O2 to H2O is C. 5:4.
What is the C3H8 to H2O mole ratio?Looking at the coefficients, the stoichiometric proportion of water to methane (C3H8) is 4:1.In other words, 4 moles of water were produced for every mole of propane that is utilized.Hence, 0.1486 moles of C3H8 will be required for propane in order to produce 0.5944 moles of H2O.
What kind of reaction does ch4 g)+ 2o2 g)+ 2H2O g) represent?Combustion is the correct response (letter C).An illustration of a complete combustion is the one that was given.Oxygen gas is a reactant in a combustion reaction that results in the products carbon dioxide and water.
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substances decrease in size on __ (heating/ cooling) and contract.
Fill in the Blank
Complete the following sentence.
An example of
is the weight of a soil sample.
Answer: Quantitative data
Explanation:
Which one of the following processes does NOT use Calcium?
Group of answer choices
Component of thyroxine
Muscle contraction
Nervous impulses
Blood coagulation
https://www.sciencenews.org/article/first-black-hole-discovery-cygnus-massive
Can someone read the article and write a two paragraph summary for me? (anyone who is not busy and someone who can write)
The second paragraph is how this information affects the world and life as we know it.
I will give you 20 points or more if its good + Brainlist
Answer:
Cygnus X-1 21 is the heaviest stellar hole to be discovered. Cygnus X-1 21 weighs 21 times as the sun's mass. Scientists previously assumed wrong, it is around 1.5 times heavier then the last estimate. Cygnus X-1 21 was discovered by scientists using VLBA (Very Long Baseline Array.) This was discovered without gravitational waves which is usually used in science.
The network is 10 radio dishes and ranges to the United States, from Hawaii to the Virgin Islands. VLBA was responsible for tracking radio-bright jets of material flowing out of Cygnus X-1’s black hole for six days straight. Cygnus X-1 is around 7,200 light-years from Earth, which contradicts the last estimate of 6,000. The measurement for this new discovery gives astronomers a tough challenge in their understanding of black holes. Theres more to come in science with each discovery made.
Explanation:
is this good?
a 75.0 balloon hold 59.3g of neon gas. the gas is released until the balloon volume is 61.8 L. how many grams of neon escaped?
Answer:
A rigid tank holds a 2.91 moles of gas at a pressure of 772 kPa. What will the pressure be if another 1.09 moles of gas is added?
Explanation:
Your friend John is having trouble with his compost bin. The material in his compost pile doesn't seem to be decomposing
well. You take a sample of the pole and check for the presence of microorganisms under the microscope You see that there
are indeed microorganisms, however, they don't appear to be growing very fast John says that he regularly mixes his
compost pile to expose it to oxygen What is the most likely explanation for this problem?
The temperature may not be high enough to encourage microorganism growth
Inorganic materials may have been included in the compost pile
The temperature may be too high for microorganisms to tolerate
Inappropriate food waste may have been included in the compost pile
The reaction Cl2(g) + 2KBr(aq) --> 2KCl(aq) + Br2(l) is a(n)
Group of answer choices
single-replacement reaction.
ionic reaction.
combustion reaction.
synthesis reaction.
Answer:
synthesis reaction
Explanation:
The reaction represents by the equation C12+ 2kBr(aq) +Br2(l) is a(n) single displacement. in one type of synthesis reaction, an element combines with oxygen to yield a(n) oxide.
Answer:
I know I'm late but its actually a single-displacement reaction.
Explanation:
Chlorine replaces Bromine
If a combination reaction takes place between lithium and fluorine, the chemical formula for the product is A. LF B. LiF C. LiF2 D. Li2F
What is the main disadvantage of parallel circuits?
Any break in the circuit stops the flow of charges.
There are multiple paths for charges to flow.
If one bulb goes out, the other bulbs will go out.
They are complicated to design and build.
Answer:
Hi there!!!! The answer is D. Have a good day
Explanation:
The parallel circuit is the most common type of electrical circuit used in houses and equipment. It generates more stable and efficient power system. They are complicated to design and build is the main disadvantage of parallel circuits. The correct option is D.
What are parallel circuits?A circuit is said to be in parallel in connection when the electric current has multiple paths to flow through. The components which are a part of the parallel circuits will have a constant voltage across all ends.
The major disadvantages of parallel circuits are, it requires the use of a lot of wires, it is not possible to increase or multiply the voltage in a parallel circuit. The parallel connection also fails at the time when it is needed to pass same quantity of current through the units.
Thus the correct option is D.
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Select the structure that corresponds
to the name:
3,5,6-trichloro-2-heptanol
Answer:C both
Explanation:
The Structure that correspondsto the name: 3,5,6-trichloro-2-heptanol is C both.
How nomenclature is done in organic compound ? First name the principal carbon chain and also check type of bonds single or double present on the carbon chain. Name the functional group according to Seniority table. Name the substituent alphabetically. Both are isomers∵ all are substituent and OH alcohol is added on the principal carbon chain both names are suggested.
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science 0.00897 in scientific notation
the answer is
8.97×10^-3
what is fermentation
Fermentation is a metabolic method that creates chemical changes in natural substrates through the action of enzymes.
Explanation: hope this helps :)
An element that is likely to combine with other elements to form new substances is said to be ______.
A. buoyant
B. chemically reactive
C. metallic
D. solid at room temperature
Answer:
B. Chemically reactive
Explanation:
A Chemically reactive element is an element that is likely to combine with another element to form new substances
The reactivity of the element depends on the number of electrons in the outermost energy level and even the distance of the outermost energy level from the nucleus. From the periodic table, Fluorine is the most reactive non-metal while francium is the most chemically reactive metal
How is sedimentary rocks formed?
Answer:
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension
Explanation:
Question 21 of 25
Which of the following best describes an Arrhenius acid-base reaction?
O A. Acid + base = H+ + OH-
B. Acid + base = salt + water
C. Acid + base = conjugate base + conjugate acid
D. Acid + base =
H20
Answer:
B. Acid + base = salt + water
Explanation:
In accordance to the proposal of a scientist called Svante Arrhenius, an acid is a substance that increases the H+ concentration of a solution by dissociating into it while the base increases the OH- concentration of a solution by dissociating into it. Furthermore, Arrhenius stated that this two ions combine in an aqueous solution to give water.
Hence, Arrhenius acid-base reaction is the combination of an acid and base to produce salt and water as products. That is; Acid + base = salt + water.
calculate the mass of an atom of silver
Answer:
The Atomic mass of Silver is 107.8682u
Answer:
107.8682 u
Explanation:
Hope this will help
What are molecules, and how are the properties of molecules different from the atoms they come from? Give an example.
Answer:
Molecules are the smallest particle of a compound or element which can be found in nature as a free entity and made up of atoms bonded together. The molecules can not take part in the chemical reaction on their own directly.
An atom is on other hand is the smallest particle that does not exist free in nature and bonded together to form molecules and involves in the chemical reactions directly.
Therefore we can say that the molecules are formed by atoms while the atom exists as an entity in nature.
17. A substance breaks down into its component elements when it is heated. If 68.0 g of
the substance is present before it is heated, what is the combined mass of the
component elements after heating?
The combined mass of its component elements after heating is 68.0 g.
According to the law of conservation of mass, matter is neither created nor destroyed but is converted from one form to another.
When a substance is decomposed into its components, the total mass of components recovered after heating must be equal to the mass of substance before heating in accordance with the law of conservation of mass.
As such, the mass of the elements obtained after heating must also be 68.0 g.
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What is SVD in chemistry
Answer:
Singular value decomposition (SVD)
Explanation:
If u search go ogle u could find a good definition here is one I found:
"Singular value decomposition (SVD) is a technique commonly used in the analysis of spectroscopic data that both acts as a noise filter and reduces the dimensionality of subsequent least-squares fits." credit: science direct <3
Hope this helps! :) Plz mark brainliest!
An aluminum soft drink can is approximately 0.55 moles of aluminum. How many
aluminum atoms are used in manufacturing each soft drink can?
Explanation:
Round 87.073 meters to 3 significant figures. write your answer in scientific notation. step 1: 87.073 rounds to step 2: write scientific notation : meters...
One mole of aluminum contains 6.022 × 10²³ atoms. This number is called Avogadro number. Therefore, 0.55 moles of aluminum contains 3.31 × 10²³ atoms.
What is Avogadro number ?One mole of any substance contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Aluminum is 13th element in periodic table. It shows metallic properties as well as some non-metallic properties. The symbol of aluminum is Al. It forms compounds mostly through covalent bonding.
One mole of aluminum contains 6.022 × 10²³ atoms.
Thus, number of atoms in 0.55 moles = 0.55 × 6.022 × 10²³ = 3.31 × 10²³ atoms.
Therefore, the number of Al atoms in 0.55 moles is 3.31 × 10²³ .
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How can you use the Periodic Table of Elements to help you find information about specific elements? PLZZZ HELP MEEEEEE!!!!
Answer:
Yuh imma help-........
What geological forces might be responsible for this range of mountains?
Why to you do that this app doesn’t tell me anything
Some factories that burn coal produce smoke with harmful chemicals, such as sulfur. Scrubbers are devices that are attached to the smokestacks to reduce the amount of sulfur put into the atmosphere. To evaluate the effectiveness of these devices, what data would need to be collected?
Answer:
4.5 CH4 (g) + 2 O2 (g) CO2 (g) + 2H2O (l) +ENERGY Hydrocarbon fuels like methane (CH4) burn in the presence of oxygen to produce carbon dioxide and water. This process of combustion releases energy. When energy is released during the course of a chemical
Explanation:
For a particular reaction at 135.4
°C, Δ=−775.41 kJ/mol
, and Δ=817.91 J/(mol⋅K)
.
Calculate ΔG for this reaction at 12.7
°C.
Answer:
[tex]\Delta G=-675.38 \frac{kJ}{mol}[/tex]
Explanation:
Hello!
In this case, for this problem, it is possible to use the thermodynamic definition of the Gibbs free energy:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
Whereas G, H and S can be assumed as constant over T; thus, we can calculate H at 135.4 °C:
[tex]\Delta H=\Delta G+T\Delta S\\\\\Delta H=-775.41\frac{kJ}{mol}+(135.4+273.15)K*(0.81791\frac{kJ}{mol*K} )\\\\\Delta H=-441.58\frac{kJ}{mol}[/tex]
Now, we can calculate the Gibbs free energy at 12.7 °C as shown below:
[tex]\Delta G=-441.58\frac{kJ}{mol} -(12.7+273.15)K*0.81791\frac{kJ}{mol*K}\\\\\Delta G=-675.38 \frac{kJ}{mol}[/tex]
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pleassee help asap its only one question ..its the bottom one and its 30 points plzzzzzzzz
Answer:
sorry !
Explanation: