The mass of water needed to absorb 456 J is 1.44 g
We'll begin by calculating the change in the temperature of the water.
Initial temperature of water (T₁) = 22.7 °C
Final temperature (T₂) = 98.3 °C
Change in temperature (ΔT) =?ΔT = T₂ – T₁
ΔT = 98.3 – 22.7
ΔT = 75.6 °CFinally, we shall determine the mass of the waterHeat absorbed (Q) = 456 J
Change in temperature (ΔT) = 75.6 °C
Specific heat capacity of water (C) = 4.184 J/gºC
Mass of water (M) =?Q = MCΔT
456 = M × 4.184 × 75.6
456 = M × 316.3104
Divide both side by 316.3104
M = 456 / 316.3104
M = 1.44 gTherefore, the mass of the water is 1.44 g
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wsphorus-SL 3. In the isotope B-11, what does the 11 represent?
Answer:
Here boron-11 means the name of the element is boron and the mass number is 11
Explanation:
a bond in which only one pair of
electrons is shared?
Answer:
A single covalent bond
Explanation:
A single covalent bond is when only one pair of electrons is shared between atoms. A sigma bond is the strongest type of covalent bond, in which the atomic orbitals directly overlap between the nuclei of two atoms.
Answer:
Single covalent bond.
Explanation:
Single covalent bond is the type of bond in which only one pair of electrons is shared between atoms.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807RNA is a double strand. True or False?
Answer:
False, RNA is single stranded, DNA is double stranded and forms a double helix
Explanation:
Elements that are usually shiny and good conductors of heat and electricity are known as_______.
Points: 70
A 100 watt solar power panel usually costs $146 they are on sale for 0.75 of the regular price what is the sale price
Figure 1
Describe how a frog grows. Why do you think the eggs are found in the water? Where do you think fertilization happens?
The process of fertilization occurs externally in frogs.
Stages of lifecycleA full growth of frog occurs when it passes through five stages of its life cycle. During a frog's metamorphosis, an egg will hatch and a tadpole appear in which the back legs emerge first, then front legs, and finally it become a full grown adult frog.
Eggs of frogA frog's eggs are found in water because they do not have a hard protective shell like birds and reptiles. The frog's eggs are covered with a glycoprotein, which helps to keep the eggs moist so that's why the frog lays its eggs in water in order to prevent them from drying.
FertilizationIn most species of frogs, fertilization occurs externally. The male frog grabs the female's back and fertilizes the eggs as the female frog releases the eggs. Those eggs which receives the sperm will fertilized so we can conclude that the process of fertilization occurs externally in frogs.
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what are some negative impacts on the environment and society when the water cycle is disrupted and drought occurs ?
Some of the negative impact of disruption in water cycle are adverse environment, with affected farming, hydroelectricity, and deforestation.
The water cycle has been operated in the environment for the conversion of water in the different states. The water cycle has been operated with the conversion of water from the water body to the clouds by evaporation.
The evaporated water has resulted in clouds, that have been condensed and precipitated in the form of rain. The water cycle helps in maintaining the water balance in the ecosystem. It made the water available for use as well.
The drought has been the condition of the scarcity of water. In this condition, there has been a disruption of the water cycle. Some of the negative impacts resulting from the disruption of the water cycle are:
Adverse environmental conditionsFarming affected by water scarcityUnavailability of hydroelectricityDeforestationFor more information about water cycle, refer to the link:
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Can someone help me please
Answer: The correct pairs of elements likely to form ionic compounds are, potassium and sulfur, magnesium and chlorine. The answer is argon please give me brainlist
Explanation:
1.37x1020 uranium atoms
Explanation:
1397.4 uranium atoms......
How many moles are in 9.12 x 1023 molecules of sugar?
Answer:
1.514 moles
Explanation:
For this problem you want to use dimensional analysis and cancel out your molecules of sugar and be left with moles of sugar. We know that 1 mole (of anything) = 6.022 x 10 ^ 23 molecules, so we should use that conversion to help us. Start with 9.12 x 10 ^23 molecules and divide by 6.022 x 10 ^ 23 molecules, and you will be left with moles.
Hope this helps!
Which of the following methods of heat transfer causes the tectonic plates to move?
Conduction
Convection
Evaporation
Radiation
A student wants to test for the concentration of food dye FD&C Yellow #5 (Tartrazine) in a yellow Starburst candy. First, the student must prepare standard solutions for the calibration curve. The student has a stock solution of FD&C Yellow #5; the concentration is 0.1140 M. The student takes 6.50mL of the stock solution and dispenses it into a 50.0mL volumetric flask. The flask is then diluted to volume with water. What is the concentration of this standard solution?
The molarity of the diluted standard solution is obtained by calculation to be 0.015 M.
Recall the dilution formula;
C1V1 = C2V2
C1 = Initial concentration = 0.1140 M
V1 = initial volume = 6.50mL
C2 = Final concentration = ?
V2 = Final volume = 50.0mL
Making C2 the subject of the formula and substituting values;
C2 = C1V1/V2
C2 = 0.1140 M × 6.50mL/50.0mL
C2 = 0.015 M
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In the TCA cycle, ____ oxidation(s) use(s) NAD as the oxidizing agent while ____ oxidation(s) use(s) FAD as the oxidizing agent.
Tricarboxylic acid cycle often occur in stages. In the TCA cycle, 3 oxidation(s) use(s) NAD as the oxidizing agent while 1 oxidation(s) use(s) FAD as the oxidizing agent.
Tricarboxylic acid cycle commonly called TCA cycle is also regarded as the Krebs cycle and citric acid cycle. It is known to be the second stage of cellular respiration.It consist of a three-stage process where living cells uses organic fuel molecules in the presence of oxygen to take-up energy that is needed for growth and division.
See full question below
In the TCA cycle, ____ oxidation(s) use(s) NAD + as the oxidizing agent while ____ oxidation(s) use(s) FAD as the oxidizing agent.
a. 0; 4
b. 1; 3
c. 2; 2
d. 3; 1
e. 4; 0
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Two protons and two neutrons are released as a result of this reaction. Superscript 222 subscript 86. Rn Right arrow superscript 218 subscript 84. Po ? Which particle is released? one alpha particle two beta particles one alpha and one beta particle one high-energy photon.
The particle released in the reaction has been an alpha particle. Thus, option A is correct.
The release of protons and neutrons in a reaction has been nuclear reactions. The reactions results in the change in the atomic mass of the atom, with the formation of new atom. The extra mass has been released in the form of energy.
The release from the given reaction has been:
[tex]\rm ^{222}_{66}Rn\;\rightarrow\;^{218}_{84}Po\;+\;^A_ZX[/tex]
Where, X has been the particles that has been released with the nuclear reaction. The superscript A has been the Mass of particle, and subscript Z has been the atomic number.
According to the law of conservation, the mass has been constant on both the product and the reactant side. Thus, the mass and atomic number of eliminated particles has been given as:
[tex]\rm 222=218+A\\A=222-218\\A=4[/tex]
The atomic mass of the particle has been 4.
[tex]\rm 86=84+Z\\Z=86-84\\Z=2[/tex]
The atomic number of the particle has been 2.
The element with atomic mass 4, and atomic number 2 has been the Helium particles, [tex]\rm ^4_2He[/tex]. It has been an alpha particle. Thus, the particle released in the reaction has been an alpha particle. Thus, option A is correct.
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Answer:
A
Explanation:
What’s clues indicate that a chemical reaction has occurred?
Answer:
Color change, formation of bubbles, and temperature change
A force is a push or a pull under the right circumstances anything can exert a force push a notebook or some other object so that it slides across a table or desktop what force causes the notebook to start moving what force causes the notebook to stop moving?
Answer:
the force that you applied caused the notebook to move.the force applied on the notebook by the table causes it to stop moving. this is because after sometime the book uses up the force and later the force you applied is less than that of the force by the table.
Which of the following statements describes sound energy?
Sound energy does not travel at all.
Sound energy needs a medium to travel through.
Sound energy can travel in empty space.
Sound energy can only travel through air.
Answer:
C.
Explanation:
What is photosynthesis?
Explanation:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Answer:
photosynthesis is the process of making food by green plants by using sunlight,carbon dioxide, water.
Fluorine-18 undergoes positron emission as shown:
18 F + 4x +48
Enter the appropriate values for A and Z and the chemical
symbol for X
A:
Z:
83
1
X:
Answer:Answer:
40-18 fl =>40-cl+cl+0-1e sorry if im rong
Explanation:
When [tex]^1^8F[/tex] undergoes positron emission, the product nucleus is, [tex]^1^8O[/tex].
What is a positron emission?In positron emission, also called positive beta decay (β+ decay), a proton in the parent nucleus decays into a neutron that remains in the daughter nucleus, and the nucleus emits a neutrino and a positron, which is a positive particle like an ordinary electron in mass but of opposite charge.
When a proton is converted into a neutron then the positron emission takes place as follows.
[tex]^1_1p\;\rightarrow\;^1_0n\;+\;^0_+1e[/tex]
A positron is represented by the symbol. Therefore, when a positron emission occurs then the resultant nuclei atomic number decreases by a unit mass.
The general equation representing positron emission is as follows.
[tex]^M_ZA\;\rightarrow\;^M_Z_-_1 B\;+\;^0_+1e[/tex]
Hence, fluorine-18 decays by positron emission as follows.
[tex]^1^8_9F\;\rightarrow\;^1^8_8n\;+\;^0_+1e[/tex]
Therefore, when [tex]^1^8F[/tex] undergoes positron emission, the product nucleus is, [tex]^1^8O[/tex].
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Please help I’ll give brainiest
Based on seismometer data what kind of information can seismologists calculate?
location, quantity, and time of damage created by earthquake
track movements of magma in the Earth's mantle and find out when volcanos will erupt
the distance of the earthquake's epicenter, the location of the epicenter, and when tsunamis will strike coastal areas
time of earthquake, magnitude and velocity, and type of seismic waves
Answer:
Time of earthquake, magnitude and velocity, and type of seismic waves
Explanation:
Seismometers allow us to detect and measure earthquakes by converting vibrations due to seismic waves into electrical signals, which we can then display as seismograms on a computer screen. Seismologists study earthquakes and can use this data to determine where and how big a particular earthquake is.
1 point
A system that absorbs energy from its surroundings is said to be: *
Answer: Exothermic.
Explanation:
Exo means “outside” and the outside relates to surroundings so it’s my best choice.
Answer:
endothermic is the answer
Why can't percent yield be greater than one hundred percent?
Answer:
Percent yield is the maximum amount of product that can be formed in a reaction. Matter cannot be created or destroyed according to the law of conservation of mass, so you cant have over 100%.
Explanation:
What type of volcano is formed at a weak spot in the middle of a plate?
a.
lava
c.
hot spot
b.
fault
d.
plate
Hot spot volcano is the type of volcano which is formed at a weak spot in
the middle of a plate.
Hot spot volcano is an area in the Earth crust which is characterized by large
amount of heat flow in the area due to the volcanic activity. Hot spot
volcano is formed at the middle of the plate as against junctures in which
other types are formed.
The weak spot is what gives rise to the unusual heat flow which makes hot
spot volcano most appropriate.
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what is waves is energy passing through the medium of water? true or false
i have no idea what you said but for the sake of god its true
WILL GIVE BRAINLIEST
Which model provides more information-a chemical formula or a sketch of the molecule
like in the structural formula? Explain your reasoning.
Answer:
Explanation
:Both b/c a chemical formula tells you how many and a sketch formula shows how they are bonded together.
Molecular formulas show how many atoms of each element one molecule of a compound contains. Note: Ionic compounds are generally crystalline solids with high melting points. Other compounds, however, have very different properties.
can you help me with this
Answer:
I think it is A
Explanation:
if I am wrong I am so so so sorry
but i'm pretty sure I am right.
please let me know if I am right :)
Help. 50 points. Need honest answers.
Answer:
ok
Explanation:
Can someone help please
Answer:
To achieve stability
Explanation:
Chemical reactions happen so that the atoms of the elements involved in the chemical reaction will become stable and therefore achieve stability.
For the following hypothetical reaction:
3A + 12B --> 3C
How many moles of B will you need to convert 5 moles of A into as many moles of C as possible?
Answer:
20
Explanation:
You need 4 times the amount of B, compared to a (there is a 3A:12B which reduces to 1:4), so 4 times 5 is 20.
Hope this helps!
I NEED MORE HELP ASAPP
Answer:
1) Gas
2) Higher
3) Increases
4) Higher
Explanation: