Answer:
D. superscript 32 subscript 15 upper P
Explanation:
took the test
An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Superscript 32 subscripts 15 upper P is a symbol of this radionuclide. Therefore, option D is correct.
What is a radionuclide?A radionuclide is a type of nuclide that is unstable and undergoes radioactive decay. This means that the nucleus of the radionuclide is not stable and will spontaneously emit energy in the form of particles or electromagnetic radiation to become more stable.
The symbol of an element is determined by the number of protons in the nucleus, which is also known as the atomic number. In this case, the radionuclide has 15 protons, so it is an atom of phosphorus, which has an atomic number of 15.
The total number of nucleons in the nucleus (protons + neutrons) is 15 + 17 = 32. Therefore, the correct symbol for this radionuclide is Superscript 32 subscript 15 upper P, which represents an isotope of phosphorus with a mass number of 32.
Thus, option D is correct.
To learn more about the radionuclide, follow the link:
https://brainly.com/question/14605156
#SPJ3
Identify whether this describes heat or temperature.
Definition: a form of energy
Why would a laptop, a car, a cellphone, and a watch all contain chemical energy?
Answer:
Maybe its because they need some sort of energy to work, a car is quite straight forawrd but im not sure about a watch :/
Which of the following compounds has the highest boiling point?
a) butane
b) butanoic acid
c) butanal
d) ethyl acetate
Answer:
Butanoic acid
Explanation:
For this assignment, you will ask questions about the factors that have caused a rise in global temperatures over the past century. Then, you will conduct research to answer your questions. You will also graph provided information, analyze the graphs, and make conclusions based on the graphs. Finally, you will write a paper describing the conclusions of your research and graphs.
Answer:
Air pollution is the main cause of rise in temperature over the past century.
Explanation:
Due to increase in the industrialization in different countries of the world and also burning of more fossil fuels in the engines of vehicles and jets are the main reason of increasing global temperature. Both industries and vehicles produce high amount of carbondioxide which is a greenhouse gas that blocks the passage of reflected radiation from the earth surface and traps this radiation which increases the temperature of the earth.
My project is in the file attached, lots of thanks to Maxineishere for helping me with the essay. You may need adobe reader for this as the files are PDF files, I hope you are satisfied! :)
DATE ANSWERED: 5/8/2021
HELP PLS!!! WILL GIVE BRAINLIEST!!!
Which of the following would be evidence that a chemical reaction has occurred? (Select all that apply.) *
a change in shape
a precipitate is formed
an unexpected change in color
the formation of gas bubbles
smoke begins to form
clear liquids remain clear
the odor changes
the substance becomes very cold
A baseball pitcher throws a fastball to a batter.
Answer:
2nd option
Explanation:
The diagram is an example of which of the following?
aldehyde
alkane
alkene
alkyne
The answer is B: Alkane
The diagram is an example of an alkane which contains n-carbon and 2n+2 hydrogen.
What is alkane?Alkanes are saturated hydrocarbons. This means that their carbon atoms are joined to each other by single bonds.
Alkanes are organic compounds that consist of single-bonded carbon and hydrogen atoms. The formula for alkanes is [tex]C_nH_2_n_+_2[/tex].
Methane ([tex]CH_4[/tex]), ethane ([tex]C_2H_6[/tex]), propane ([tex]C_3H_8[/tex]) and butane ([tex]C_4H_1_0[/tex]) are the first four alkanes.
Hence, the diagram is an example of alkane.
Learn more about alkane here:
https://brainly.com/question/3940366
#SPJ2
how many moles is 22.4 liters of oxygen gas at standard temperature and pressure represent
Answer:
So 1 mole
Explanation:
PV = nRT
P = Pressure atm
V = Volume L
n = Moles
R = 0.08206 L·atm·mol−1·K−1.
T = Temperature K
standard temperature = 273K
standard pressure = 1 atm
22.4 liters of oxygen
Ok so we have
V = 22.4
P = 1 atm
PV = nRT
n = PV/RT
n = 22.4/(0.08206 x 273)
n = 22.4/22.40
n = 1 mole
QUICK I NEED THE ANSWER!! Compare the symmetry of an echinoderm to the symmetry of worms
A. Both echinoderms and worms have bilateral symmetry
B.Echinoderms have bilateral symmetry and worms have radial symmetry
C.Echinoderms have radial symmetry and worms have bilateral symmetry
D.Both echinoderms and worms have radial symmetry
Answer:
C.Echinoderms have radial symmetry and worms have bilateral symmetry
Explanation:
Echinoderms evolved from animals with bilateral symmetry. The larvae of all echinoderms are bilaterally symmetrical but lost during metamorphosis developing into radial symmetry adult. Examples of echinoderms are starfish, sea urchins, sand dollars.
Worms are invertebrate animals having bilateral symmetry. They have a definite anterior (head) end and a posterior (tail) end. Worms have brains that help them detect objects, food, mates, and predators quickly.
what do we call a group that comes off of the main carbon chain
Answer:
I believe it is an Alkane
Explanation:
Which process releases heat?
A. Grilling vegetables
B. Frying an egg
C. Boiling water
D. Setting off a firecracker
Hello there!
Question: Which process releases heat?
Explanation: The process the releases heat is called the exothermic process while the process is which heat is absorbed or taken is is called the endothermic process. The answer choices are examples of either endothermic or exothermic processes.
Answer Choices:
A. Grilling Vegetables
B. Frying an egg
C. Boiling water
D. Setting off a firecracker
Correct Answer:
D. Setting off a firecracker
Reasons:
A would not be correct since grilling vegetables is an endothermic process in which heat is being taken in to grill the vegetables.
B would not be correct since frying an egg is again taking in heat to fry the egg which is again, an endothermic process.
C would not be correct since boiling water is taking in heat to heat up the water which makes it endothermic process once again.
D would be correct since it is releasing heat when the explosion is triggered and you can feel the wave of heat afterwards.
P.S: These are all chemical reactions except for boiling water since that is a physical change.
What is the scale factor?
Answer:
Scale Factor: 1 : 2
X = 11
Explanation:
3 / 3 = 1
6 / 3 = 2
The scale factor should be 1:2
So 'X' should be 11 since 5.5 * 2 = 11
Consider the following reaction. Upper C upper O subscript 2 (g) plus upper H subscript 2 (g) right arrow Upper C upper O (g) plus upper H subscript 2 upper O (l). What is being oxidized? carbon carbon dioxide oxygen hydrogen
Answer:
hydrogen
Explanation:
In the reaction between carbon dioxide and hydrogen gas, the species which oxidized is hydrogen. Hydrogen in this reaction oxidizes from 0 to +1 oxidation state.
What is oxidation ?Oxidation is the reaction with oxygen or loss of an electron in a reaction to form the upper oxidation states. The change in oxidation state depends on the number of electrons lost.
The given reaction is written as follows;
[tex]\rm H_{2} + CO_{2} \rightarrow CO+ H_{2}O[/tex]
In this reaction, one mole of hydrogen gas reacts with one mole of carbon dioxide giving carbon monoxide and water.
In H₂ state, hydrogen is in zero oxidation state. But in water, H is in +1 oxidation state. In carbon dioxide, carbon is in +4 oxidation state and in CO it has +2. Hence, the oxidized species is hydrogen.
Find more on oxidation:
https://brainly.com/question/16976470
#SPJ6
What type of energy is used to power up the lite bulb?
When the light bulb turns on, energy is being converted into what forms? How do you know?
What happens when you increase the voltage of the battery? Explain using terms like light, thermal, electric energy.
Answer: electrical energy
Heat
electric current
Explanation:
In your common lightbulb you will transform electrical energy into two main forms of energy coming off of the lightbulb. Heat: from the filament of the bulb because you are running an electrical current through the filament. The heat is so immense that it forms our second form of energy, which is light!
URGENT HELP NEEDED! PLEASE ANSWER WITH EXPLANATION*
Much appreciated
1) An 85.0 g sample of copper is initially at 22.2 ∘C What is the final temperature if the sample absorbs 2.35 kJ of heat?
The specific heat of Cu is 0.385 J/(g^ Degree C)
-----------------------------------------------------------------------------------------------------------------------------
2) A 75.0 g sample of aluminum is heated to 65.3 ∘C then allowed to cool. What is the final temperature if the sample releases 2.07 kJ of heat?
The specific heat of Al is 0.903 J/(g degree C)
Answer:
1) 94.0° C, 2) 34.7°C
Explanation:
1)
Q=mcΔt° =mc(t2 - t1)
2350 J = 85.0 g* 0.385 J/(g*°C) *(t2 - 22.2°C)
t2 - 22.2°C = 71.81°C
t2 = 94.0° C
2)
Q=mcΔt° =mc(t2 - t1)
- 2070 J = 75.0 g * 0.903 J/(g*°C) *(t2 -65.3°C)
t2 - 65.3°C = - 30.56°C
t2 = 34.7°C
HELP I NEED TO SHOW HOW TO GET THESE TWO ANSWERS!!!
Aluminum will react with sulfuric acid in the following reaction.
2Al(s) + 3H2SO4(l) → Al2(SO4)3(aq) + 3H2(g)
a. How many moles of H2SO4 will react with 18 mol Al? ans: 27 mol H2SO4
b. How many moles of each product will be produced?
ans: 27 mol H2, 9 mol Al2(SO4)3
Answer:
A. the ration is 2 to 3, 2Al + 3H2SO4 has the same balance as 18Al + 3H2SO4
2/3 = 18/27
B. Doesn't need an explanation other than the work you did to balance it.
The moles of sulfuric acid reacted with the reaction has been 27 moles. The moles of hydrogen produce is 27 mol, and aluminum sulfate is 9 mol.
What is stoichiometric law?
The moles of reactant reacted in the reaction, and the moles of product produced, can be given by the stoichiometric law.
According to the stoichiometric law, the moles of product produces, and the reactant reacted is given by the stoichiometric coefficient.
In the given reaction, 3 moles of sulfuric acid reacts with 2 moles of Al. The moles of sulfuric acid reacted with 18 moles of aluminum will be given as:[tex]\rm 2\; mol\;Al=3\;mol\;H_2SO_4\\\\18\;mol\;Al=\dfrac{3}{2}\;\times\;18\;mol\;H_2SO_4\\\\ 18\;mol\;Al\;=27\;mol\;H_2SO_4[/tex]
Thus, the moles of sulfuric acid reacted in the reaction are 27 moles.
The stoichiometric law gives the formation of 1 moles of aluminum sulfate from 2 moles of Al. The moles of aluminum sulfate produced from 18 moles Al is given as:[tex]\rm 2\;mol\;Al=1\;mol\;Al_2(SO_4)_3\\\\18\;mol\;Al=\dfrac{1}{2}\;\times\;18\;mol\;Al_2(SO_4)_3\\\\ 18\;mol\;Al=9\;mol\;Al_2(SO_4)_3[/tex]
The moles of aluminum sulfate produced in the reaction are 9 moles.
The moles of hydrogen produced from 2 moles of Al are 3 moles. the moles of hydrogen produced from 18 mol Al has been:
[tex]\rm 2\; mol\;Al=3\;mol\;H_2\\\\18\;mol\;Al=\dfrac{3}{2}\;\times\;18\;mol\;H_2\\\\ 18\;mol\;Al\;=27\;mol\;H_2[/tex]
The moles of hydrogen produced in the reaction are 27 moles.
Learn more about moles produced, here:
https://brainly.com/question/10606802
What is mechanical weathering? How do water, ice, wind, and organisms cause mechanical weathering? How can organisms and wind cause it?Type out an explanation of why that answer is correct
Answer:b
Explanation:c
1. Atomic number is the number of_____in an atom .
A)neutrons
B)protons
C)electrons
Answer:
B. Protons
Explanation:
The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element.
Answer:
protons
Explanation:
The process of fermentation involves chemical reactions that convert solid glucose (C6H12O6) into aqueous ethanol and carbon dioxide gas. Write the balanced chemical equation
Answer:
C6H12O6 —> 2C2H5OH + 2CO2
Explanation:
The equation for the reaction is given below:
C6H12O6 —> C2H5OH + CO2
We can balance the equation above as follow:
There are 12 atoms of H on the left side and 6 atoms of the right side. It can be balance by putting 2 in front of C2H5OH as shown below:
C6H12O6 —> 2C2H5OH + CO2
There are 6 atoms of C on the left side and 5 atoms on the right side. It can be balance by putting 2 in front of CO2 as shown below:
C6H12O6 —> 2C2H5OH + 2CO2
Now the equation is balanced.
How many moles are in 6.97g of Chromium?
Answer:
0.134 moles
Explanation:
In order to solve this, we need to find the molar mass of Chromium, which we can see from the periodic table: it is 51.996 g/mol.
Now, we need to set up an equation to convert grams to moles:
[tex]6.97 grams*\frac{1mol}{51.996grams} =0.134mol[/tex]
Thus, the answer is 0.134 moles of Chromium.
Explanation:
Step 1: Find how many moles
Formula → [tex]grams*\frac{1 mol}{51.996grams}[/tex]
[tex]6.97 g *\frac{1 mol}{51.996g}[/tex] ← The g's cancel and there is only moles left on top
[tex]0.13405... mol[/tex]
Answer: Rounded - 0.13405 moles of Chromium
Explain why or why not the change is a chemical change or not.
A. The outside of a piece of cheese has turned green from mold.
B. An antacid tablet dissolves in water and forms carbon dioxide.
C. Ice melts and forms a puddle of water.
D. A piece of clay is broken in half.
Explanation:
A. Not a chemical reaction. Mold is a small organism.
B. Chemical reaction. When antacid tablet reacts with water CO2 is emitted.
C. Not a chemical reaction ice and water are 2 states of H2O. H2O solid and H2O liquid
D. Not a chemical reaction reactants and the result is the same clay.
How are a mole and a dozen similar?
Each represents a certain mass of material.
Each names a given number of objects.
Each identifies a specific volume.
Each measures a given number of amus.
Answer:
Each names a given number of objects (c)
Explanation:
Edge
Each names a given number of objects is the similarity present in mole and dozen.
What is mole and dozen?The mole refers to the number of particles or ions present in an atom in the quantity of 6.02 1023 particles while on the other hand, the dozen refer to the number of 12 items.
So we can conclude that each names a given number of objects is the similarity present in mole and dozen.
Learn more about mole here: https://brainly.com/question/15356425
A student decreases the temperature of a 556 c m cubed balloon from 278 K to 231 K. Assuming constant pressure, what should the new volume of the balloon be?
Question 1 options:
924cm3
417cm3
347cm3
876cm3
Answer:
The new volume of the balloon be [tex]462\ cm^3[/tex].
Explanation:
We have,
Initial volume is 556 cm ³
The temperature of the balloon decreases from 278 K to 231 K.
We need to find the new volume of the balloon if the pressure is constant.
The Charles law states that at constant pressure, the volume of gas is directly proportional to its temperature i.e.
[tex]V\propto T[/tex], P is constant
[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}[/tex]
[tex]V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{556\times 231}{278}\\\\V_2=462\ cm^3[/tex]
So, the new volume of the balloon be [tex]462\ cm^3[/tex].
Describe the motion of molecules in an ice cube
and in a radiator in winter.
Molecules in an ice cube move more slowly than molecules
radiator
COMPLETE
Describe the motion of molecules in these two
substances when the ice cube is placed on the
radiator.
AUCU
Answer:
Molecules in an ice cube have lower kinetic energy than molecules in a radiator. Molecules in an ice cube move more slowly than molecules in a radiator. They collide with less force than molecules in a radiator.Molecules in an ice cube have lower kinetic energy than molecules in a radiator.
Molecules in an ice cube move more slowly than molecules in a radiator. They collide with less force than molecules in a radiator.
When in direct contact, the fast-moving molecules in the radiator collide with the slow-moving molecules in the ice cube.
Kinetic energy is transferred from the molecules in the radiator to the molecules in the ice cube, causing a slowdown of the radiator molecules and an acceleration of the ice molecules.
Explanation:
Which represents a double replacement reaction and would occur?
NH4NO3(aq) + AgCIO3(aq) → AgNO3(aq) + NH4CIO3(aq)
Na2CO3(aq) + CaCl2(aq) → 2NaCl(aq) + CaCO3(s)
NaF(aq) + KCl(aq) → NaCl(aq) + KCl(aq)
NaCl(aq) → Na+(aq) + Cl-(aq)
Answer:
The correct answer is B . Na2CO3(aq) + CaCl2(aq) → 2NaCl(aq) + CaCO3(s)
Explanation:
hope it works out !!
A double replacement reaction is Na2CO3(aq) + CaCl2(aq) → 2NaCl(aq) + CaCO3(s). Therefore, option B is correct.
What is double replacement reaction ?When pieces of two ionic compounds are exchanged, two new compounds are created. These reactions are known as double replacement reactions, double displacement reactions, exchange reactions, or metathesis reactions.
We need to understand the types of ionic compounds that create precipitates in order to determine whether double-replacement reactions will take place. In order to do this, we employ solubility principles, which are broad generalizations that foretell which ionic compounds will dissolve (be soluble) and which will not (are not soluble or insoluble).
A double displacement reaction is a particular type of reaction in which two reactants swap ions to produce two new molecules. Water-soluble ionic compounds interact with one another in a number of double displacement processes.
Thus, option B is correct.
To learn more about double replacement reaction, follow the link;
https://brainly.com/question/19267538
#SPJ5
Suggest two reasons why the maximum allowed percentage of carbon monoxide
has been decreased for newer cars
The maximum percentage of carbon monoxide (CO) has been reduced for newer cars as this i) will help mitigate global warming and ii) improve human health.
What is Carbon monoxide?Carbon monoxide is a harmful diatomic gas constituting carbon and oxygenCarbon monoxide has no distinct colour or smellTo identify why the limit of carbon monoxide has to be reduced, we have to understand its effects on our environment and health.
What are the impacts of carbon monoxide on the environment?Since carbon monoxide is produced from incomplete burning of fuel, especially in cars, a lot of this gas is made by vehiclesThis leads to air pollution where the amount of carbon monoxide increases to dangerous levels in our atmosphereAs carbon monoxide is a greenhouse gas, it contributes to global warming. What are the effects of carbon monoxide on human health?If a person breathes in carbon monoxide, these molecules bind to haemoglobin better than oxygenEventually, more carbon monoxide than oxygen will be transported in their body This carbon monoxide poisoning is extremely fatal and may lead to death if not treated in timeTherefore, to i) reduce global warming and ii) improve human health, the upper limit of carbon monoxide percentage has been reduced for new vehicles.
Learn more about carbon monoxide here:
https://brainly.com/question/25350361
#SPJ2
How many moles of lithium chloride will be formed by the reaction of chlorine with 0.046 mol of lithium bromide in the following reaction?
2LiBr(aq) + Cl2(g) → 2LiCl(aq) + Br2(l) ans: 0.046 mol LiCl
Answer:
The answer is 0.046 mol.
Explanation:
By looking at the balanced equation, you can form a ratio of lithium chloride and lithium bromide using the coefficient value :
ratio of lithium bromide (2LiBr)
= 2
ratio of lithium chloride (2LiCl)
= 2
So the ratio is 2 : 2 then simplify into 1 : 1 . Which means that 1 mol of lithium bromide is equal to 1 mole of lithium chloride.
In this case, 0.046 mol of lithium bromide will form 0.046 mol of lithium chloride.
The number of moles should be 0.046 mol.
Calculation of a number of moles:Here we can create a ratio of lithium chloride and lithium bromide by applying the coefficient value :
the ratio of lithium bromide (2LiBr) = 2
And, the ratio of lithium chloride (2LiCl) = 2
Here 2:2 means 1:1
So, the number of moles should be the same i.e. 0.046 mol.
learn more about reaction here: https://brainly.com/question/13446507
Consider the nuclear equation below. Superscript 15 subscript 8 upper O right arrow superscript 15 subscript 7 upper N plus superscript 0 subscript plus 1 e. Which correctly identifies the type of reaction? alpha decay beta plus decay beta minus decay gamma decay
Answer:
beta plus
Explanation:
edg
Answer:
beta plus
Explanation:
edge
why is the bone have so much structure??
please help brainlest and 20 points
Answer:
Because if it didn't have structure then your body would fall apart
Explanation:
If you didn't have a spine you couldn't stand up straight
What heat is liberated in the formation of 10.0 grams of sulfur hexafluoride, SF6, from the elements sulfur and fluorine?
Answer:
[tex]Q=-76.7kJ[/tex]
Explanation:
Hello,
In this case, for such formation of sulfur hexafluoride, the standard enthalpy of formation is -1220.47 kJ/mol (data extracted from NIST database). Next, we compute the moles in 10.0 grams of sulfur hexafluoride as shown below:
[tex]n_{SF_6}=10.0gSF_6*\frac{1molSF_6}{146.06 gSF_6}=0.0685mol[/tex]
Next, for the given energy, we compute the total heat that is liberated:
[tex]Q=-1220.47\frac{kJ}{mol}*0.0685 mol\\\\Q=-76.7kJ[/tex]
Finally, we conclude such symbol has sense since negative heat is related with liberated heat.
Best regards.
Answer:
83.5 kJ
Explanation:
Molar mass is 146.053. Moles of 10.0 g = 0.0685 mol. Multiply by 1220 kJ/mol for the answer of 83.5 kJ.