Answer:
7
Explanation:
An isotope is an atom that has a different number of neutrons than the standard for that atom.
1)Nitogen -14 has 7 protons in the nucleus for its an isotope of nitrogen which has an atomic number of 7.
2)Now we need to find the number of neutrons. This is implied in the name of the isotope whereby the protons and neutrons add up to its atomic number. So
(14-7 protons= 7 neutrons.)
So it has 7 neutrons.
7
I just did it on edgen :)
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
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
Identify whether this describes heat or temperature.
Definition: a form of energy
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
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
What does this “e” mean in science atoms molecules etc etc
Answer:
electron in physics , and Element in chemistry.
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.
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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.
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A _________ is the distance light travels in one year. How many miles is this?
Answer:
a light year is the distance light travels in one year. 6 trillion miles!!
Explanation:
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.
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.
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what do we call a group that comes off of the main carbon chain
Answer:
I believe it is an Alkane
Explanation:
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].
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!
How many miles of H2SO4 are present in 1.63 liters of a 0.954 M solution
Answer:
1.555 moles
Explanation:
Mass of sulfuric acid is 98.079g/mol
One liter of 0.954 solution has 0.954 mols
1.63 liters will have 0.954x1.63 = 1.555moles
What is the term for the set of steps that scientists use to gather reliable
information?
Answer:
I think it would be Scientific Method.
Which of the following compounds has the highest boiling point?
a) butane
b) butanoic acid
c) butanal
d) ethyl acetate
Answer:
Butanoic acid
Explanation:
need right now, please help :)
Two planets are orbiting a star. Planet A is two times closer to the star than planet B. Which planet orbits at a higher speed?
a.) Planet A
b.) Planet B
c.) they both orbit at the same speed
Answer:
planet A
Explanation:
because it doesn’t have to go as far when it orbits
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.
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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
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.
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
how many atoms are in 95 grams of copper
Answer:
Here's a quick conversion before I answer your question, use it whenever needed.
1 moles Copper to grams = 63.546 grams. 2 moles Copper to grams = 127.092 grams. 3 moles Copper to grams = 190.638 grams. 4 moles Copper to grams = 254.184 grams. 5 moles Copper to grams = 317.73 grams. 6 moles Copper to grams = 381.276 grams. 7 moles Copper to grams = 444.822 grams.
Ok, now I'll answer your question.
Atomic masses are given in atomic mass units. One atomic mass unit is equal to one gram per mole. When you add these together for a compound, you get the molar mass of that compound. For example, silicon dioxide consists of one silicon atom and two oxygen atoms. The atomic mass of silicon is 28 grams and the atomic mass of oxygen is 16 grams.
(Hope the conversion and the answer helped) Sky
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:
A baseball pitcher throws a fastball to a batter.
Answer:
2nd option
Explanation:
what tool do you need to use to find temperature of hot chocolate a meter stick b stopwatch c balance d graduated cylinder e beaker f thermometer
Answer:
Explanation:
I believe u should use a thermometer coz its better and u will be able to find the temperature more accurately!!
Electron dot structure for Acetophenone??
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 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
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.
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