Explanation:
After calculating the density of the material we can tell if the object will sink or float without placing it in water by comparing their density.
The density of water is given as 1kg/L If the density of the material is greater than the density of water, the material will sink. If the density of the material is less than the density of the water, it will float.This way, comparing the density values of both substances can tell us whether they will float or sink.
880.7 decameters
as hectometers
Answer:??
Explanation:
1. How many moles of sulfur are in 40g of sulfur?
Answer:
1 sulfur
Explanation:
1 mole is equal to 1 moles Sulfur, or 32.065 grams
Answer:
[tex]\boxed {\boxed {\sf 1.24727159 \ moles \ of \ sulfur }}[/tex]
Explanation:
To convert from grams to moles, we must use the molar mass found on the Periodic Table of Elements.
1. Molar Mass
This is a sample of sulfur, so look for S on the table.
S: 32.07 g/mol2. Convert from Grams to Moles
Use the molar mass as a ratio.
[tex]\frac { 32.07 \ g \ S}{ 1 \ mol \ S }[/tex]
Multiply by the given number of grams: 40
[tex]40 \ g \ S * \frac { 32.07 \ g \ S}{ 1 \ mol \ S }[/tex]
Flip the fraction so the grams of sulfur will cancel each other out.
[tex]40 \ g \ S * \frac {1 \ mol \ S }{ 32.07 \ g \ S}=40* \frac {1 \ mol \ S }{ 32.07 }[/tex]
[tex]\frac {40 \ mol \ S } { 32.07 } = 1.24727159 \ mol \ S[/tex]
There are 1.24727159 moles of sulfur.
Please help me ASAP I’ll mark Brainly
Answer:
Batteries hold chemical energy
Explanation:
The battery acid in a battery leads to chemical energy.
During the process of condensation, water vapor:____________.
(1) releases 334 J/g of heat energy
(2) releases 2260 J/g of heat energy
(3) gains 334 J/g of heat energy
(4) gains 2260 J/g of heat energy
Answer: (2) releases 2260 J/g of heat energy
Explanation:
Latent heat of vaporization is the amount of heat required to convert 1 mole of liquid to gas at atmospheric pressure.
Latent heat of condensation is energy released when 1 mole of vapor condenses to form liquid droplets.
The temperature does not change during this process, so heat released goes into changing the state of the substance, thus it is called latent which means hidden. The energy released in this process is same in magnitude as latent heat of vaporization. The heat of condensation of water vapour is about 2,260 J/g.
Phase transition refers to the changes in the states of matter between gas, liquids, and solids.
The correct answer is:
Option 2. releases 2260 J/g of heat energy
The process can be explained as:
1. Condensation is the process of conversion of water vapor into the liquid state.
2. Latent heat of vaporization is defined as the amount of heat required for 1 mole of liquid to convert into a gaseous phase at atmospheric pressure.
3. The change in the temperature does not occur during the condensation, and the heat required for the phase transition is latent heat. The heat of condensation of water vapor is 2,260 J/g.
Thus, the correct answer is Option 2.
To know more about condensation, refer to the following link:
https://brainly.com/question/15563071
Which statement describes a similarity between conductors and insulators?
They both allow for the free flow of electrons between atoms.
They can both be made without matter.
They both involve high resistance to electrical charge.
They can both be used in an electric circuit.
Answer:
They can both be used in an electric circuit.
Explanation:
Though conductors and insulators are very different from each other but still they have a similarity that "they can both be used in an electric circuit".
Conductors are the material that allows electricity to flow and insulators have high resistance and do not allow electricity to flow.
Both conductors and insulators are used in an electric circuit as conductor is used in wires, batteries and bulb to flow current while insulators are used in insulation of wire, switches, plugs and etc. Combination of them makes the circuit shock free.
Hence, the correct answer is "They can both be used in an electric circuit."
Answer:
They can both be used in an electric circuit.
Explanation:
A mole of a substance has a mass in grams that is equal to the molecular mass. For example, a carbon atom has a mass of 12.01 u. A mole of carbon has a mass of 12.01 g. Based on their molar masses, list the GFM of each substance.
Answer:
hello your question is incomplete attached below is the complete question
answer :
Fe2O3 = 159 g/mol
CO = 28.01 g/mol
Fe = 55.85 g/mol
CO2 = 44.01 g/mol
Explanation:
Molar mass for Fe2O3Fe = 55.85 g/mol
O = 16.0 g/mol
hence the molar mass of Fe2O3 = 2(55.85) + 3(16) = 159 g/mol
Molar mass for COC = 12.01 g/mol
O = 16.0 g/mol
hence the molar mass of CO = 28.01 g/mol
Molar mass for FeFe = 55.85 g/mol
Molar mass for CO2C = 12.01 g/mol
O = 16.0 g/mol
hence the molar mass of CO2 = 12.01 + 2(16) = 44.01 g/mol
Answer:
There ya go ;)
Explanation:
How many neutrons are contained in nitrogen -15?
Answer:
7 neutrons
Explanation:
when you throw a ball your hand applies ____ to the ball.
1. friction
2. force
3. normal force
4. inertia
5. second law of motion
6. first law of motion
7. acceleration
Answer:
2.force
Explanation:
A sentence with the word atom
Answer:
we use atom in our sentences all the time
Explanation:
that what i put
Following intense exercise, the blood pH was determined to be 7.1. If the HCO3- is 7.5mM and the pKa for HCO3- is 6.1, what is the CO2 concentration in the blood
Answer:
[tex]0.75\ \text{mM}[/tex]
Explanation:
Concentration of [tex]HCO_3^-[/tex] = [tex][HCO_3^-]=7.5\ \text{mM}[/tex]
[tex]pK_a[/tex] for [tex]HCO_3^-[/tex] = 6.1
[tex]pH[/tex] of blood = 7.1
The reaction is as follows
[tex]H_2CO_3+H_2O\rightarrow HCO_3^-+H_3O^+[/tex]
From the Henderson equation we get
[tex]pH=pK_a+\log\dfrac{[HCO_3^-]}{[H_2CO_3]}\\\Rightarrow 7.1=6.1+\log \dfrac{7.5}{[H_2CO_3]}\\\Rightarrow 1=\log\dfrac{7.5}{[H_2CO_3]}\\\Rightarrow 10^1=\dfrac{7.5}{[H_2CO_3]}\\\Rightarrow [H_2CO_3]=\dfrac{7.5}{10}\\\Rightarrow [H_2CO_3]=0.75\ \text{mM}[/tex]
[tex]CO_2(g)+H_2O(l)\rightarrow H_2CO_3(aq)[/tex]
Concentration of [tex]H_2CO_3[/tex], [tex][H_2CO_3]=[CO_2][/tex]
Concentration of [tex]CO_2[/tex], [tex][CO_2]=[H_2CO_3]=0.75\ \text{mM}[/tex].
how do i solve this?
Answer:
here you go
Explanation:
Why are atoms electrically neutral if they contain charged particles?
Answer:
Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged).
Explanation:
A gas mixture consists of 60.0% Ar, 30.0% Ne, and 10.0% Kr by volume. If the pressure of this gas mixture is 80.0 kPa, what is the partial pressure of each of the gases
Answer: The partial pressure of Argon , Neon and krypton are 48 kPa , 24 kPa and 8 kPa respectively.
Explanation:
According to Raoult's Law , the partial pressure of each component in the solution is equal to the total pressure multiplied by its mole fraction. It is mathematically expressed as
[tex]p_A=x_A\times P_{total}[/tex]
where, [tex]p_A[/tex] = partial pressure of component A
[tex]x_A[/tex] = mole fraction of A
[tex]P_{total}[/tex] = total pressure
mole fraction of Ar = [tex]\frac{\text {Moles of Ar}}{\text {total moles}}=\frac{60.0}{60.0+30.0+10.0}=0.6[/tex]
[tex]p_{Ar}=0.60\times 80.0kPa=48kPa[/tex]
mole fraction of Ne = [tex]\frac{\text {Moles of Ne}}{\text {total moles}}=\frac{30.0}{60.0+30.0+10.0}=0.30[/tex]
[tex]p_{Ne}=0.30\times 80.0kPa=24kPa[/tex]
mole fraction of Kr = [tex]\frac{\text {Moles of Kr}}{\text {total moles}}=\frac{10.0}{60.0+30.0+10.0}=0.10[/tex]
[tex]p_{Kr}=0.10\times 80.0kPa=8kPa[/tex]
What is the molecular geometry for SF2H2?
Trigonal pyramidal
Bent
Linear
Tetrahedral
Trigonal planar
Answer:
Tetrahedral
Explanation:
SF2H2 is a derivative of the sulfuranes (SL4) compounds. The quantum mechanics of these sulfuranes is quite complicated.
Simply, they consist of ten electrons around the sulphur central atom one of which is a lone pair. The electronegativity of fluorine plays a key role in the structure and molecular geometry of SF2H2.
The molecule is found to be tetrahedral in shape by quantum mechanical calculations.
In 2011, the number of transplants in the United States was 26,745, and the number of donors was 14,146. What is most likely the reason that there were more transplants than donors? The data that were used for comparison was not compatible. O The data were not recorded accurately There were retransplants done. © Each donor gave away more than one organ.
Answer:
Each donor gave away more than one organ.
Explanation:
edge 2021
Answer: D
Explanation:
For the following reaction, 22.5 grams of iron are allowed to react with 35.0 grams of chlorine gas . iron(s) chlorine(g) iron(III) chloride(s) What is the maximum mass of iron(III) chloride that can be formed
Answer:
53.31g of FeCl3
Explanation:
The equation of the reaction is given as;
2Fe(s) + 3Cl2(g) --> 2FeCl3(s)
From the stochiometry of the reaction;
2 mol : 3 mol : 2 mol
112g : 213g : 324.4g
Converting the masses given to moles;
Number of moles of Fe = mass / molar mass = 22.5 / 56 = 0.4018
Number of moles of Cl2 = mass / molar mass = 35 / 71 = 0.4930
In this reaction, the limiting reactant is Cl2
213 g of Cl2 produces 324.4g of FeCl3,
35g of Cl2 would produce xg of FeCl3
213 = 324.4
35 = x
x = (35 * 324.4) / 213 = 53.31g
( urgent help needed!! 50pts + brainliest )
What particle remains when uranium-238 undergoes alpha decay?
A. thorium-234
B. protactinium-234
C. plutonium-234
D. neptunium-234
Answer:
Thorium-234 option a .......
238 4 234
U --> α + Th
92 2 90
The answer is A Thorium.
Which of the following is true of a balanced chemical equation?
A) The total number of molecules of reactants has to be the same as the total number of product molecules
B) the total number of atoms in the reactant molecules doesn't have to equal the total number of atoms in the product molecules
C) The identity of the atoms in the reactants has to be the same as the identity of the atoms in the products
D) The physical state of the reactants has to be the same as the physical state of the products
Answer:
A) The total number of molecules of reactants has to be the same as the total number of product molecules
Explanation:
In chemistry, a chemical equation consists of reactants and products. The reactants are the compounds/substances that chemically combine to give rise to the products. According to the law of conservation of mass, a chemical equation needs to be BALANCED.
A chemical equation is said to be BALANCED when the number of atoms/molecules on the reactant side is equal to that on the product side. In other words, total number of molecules of reactants has to be the same as the total number of product molecules
Liquid gasoline is heated and becomes gasoline vapor. The gasoline vapor is then ignited by a spark, causing a fire. The entire process is: Group of answer choices
Answer: First an endothermic and then followed by the exothermic process
Explanation:
Based on the information given in the question, we should note that the entire process is an endothermic process at first and then an exothermic process.
We should note that heat is absorbed during an endothermic process and the environment is cooled but for an exothermic process, heat is being released which leads to the increase in the temperature of the surroundings.
what are two ways minerals fom? pause time 2:23
Ann dissolves four tablespoons of salt in a bowl of water. She notices that the water has become salty. Ann then keeps
the bowl out in the sun for along time. The water in the bowl evaporates, leaving crystals of salt behind in the bowl.
What kinds of change(s) have happened?
1)The salt dissolving is a physical change and the evaporation of water is a chemical change.
2)Both the salt dissolving and the evaporation of water are physical changes.
3)The salt dissolving is a chemical change, and the evaporation of water is a physical change.
4)Both the salt dissolving and the evaporation of water are chemical changes
Answer:
2)Both the salt dissolving and the evaporation of water are physical changes.
Explanation:
The two kinds of changes that has occurred are both physical changes.
Dissolution of a solute such as salt in water and evaporation of water from a solution are physical changes.
A physical change is one in which the physical property of matter is altered. Particularly the state and the form.
In many of these cases, the change is easily reversible.
Since this change is reversible in that we were able to collect the salt back, this is a physical change.
A drawback of the space shuttle was
Answer:
The space shuttle was the result of committee compromise and political expediency. It was never the best design. It takes off like a rocket (and blows up like one on occasion) and lands like a plane (or rather, it lands like a brick with control surfaces).
Explanation:
Answer:
The space shuttle was the result of committee compromise and political expediency. In 1990 Scientists decided to launch the space shuttle. It was never the best design. It takes off like a rocket (and blows up like one on occasion) and lands like a plane (or rather, it lands like a brick with control surfaces).
A certain chemical reaction releases 31.0 kj/g of heat for each gram of reactant consumed. How can you calculate what mass of reactant will produce of heat
Answer:
See explanation.
Explanation:
Hello!
In this case, since we know the heat of reaction per gram of reactant and we should know the total energy of reaction, but it is not there, we are going to assume it is 1200 J as usual in these problems, so you can change it to whatever your given heat is.
In such a way, we set up the math as shown below:
[tex]m= 1200J*\frac{1kJ}{1000J}*\frac{1g}{31.0kJ}[/tex]
Which results:
[tex]m=0.0387g[/tex]
Best regards!
PLEASE ANSWER ASAP!!! I WILL GIVE FREE PIONTS AND BRAINLIEST IF YOU ARE CORRECT! PLEASE ANSWER ITS DUE TODAY!!!
Answer:
Explanation:
This image is a good example of the law of conservation of mass because it shows that mass is not created or destroyed. We can see this in the picture because there's 4 hydrgen and 2 oxygen atoms in the reactants (the left side of the arrow) and there's 2 oxygen atoms and 4 hydrogen atoms in the products (right side of the arrow). Since there's the same amount of atoms on both sides, then law of conservation of mass applies.
Stealing your points like how you stole mine! +*♡
Don't answer someone's question with some nonsense and then delete it; especially when I spent over an hour on that one question. I will surely delete my answers after this and still have my 15 points...
don't reap what you sow :)
You can search that up if you don't even know what that means.
Have a nice day! +*♡
Hope this helped.
determine the mass of 840 cm3 of oxygen gas, O2 at rtp
Answer:
Mass = 0.96 g
Explanation:
Given data:
Volume of oxygen = 840cm³
Temperature = at room = 25°C
Pressure = at room = 1 atm
Mass of oxygen = ?
Solution:
Volume of oxygen = 840 cm³ × 1 L /1000 cm³ = 0.84 L
Temperature = 25 +273.15k = 298.15 K
Formula:
PV = nRT
n = PV/RT
R = 0.0821 atm.L/mol.K
n = 1 atm × 0.84 L / 0.0821 atm.L/mol.K × 298.15 K
n = 0.84 atm.L / 24.48 atm.L/mol
n = 0.03 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 0.03 mol × 32 g/mol
Mass = 0.96 g
Based on the equation below, how many moles of aluminum sulfate (Al2(SO4)3) will be produced from the reaction of 5.8 moles of aluminum hydroxide (Al(OH)3) and excess sulfuric acid (H2SO4)?
Which atom has multiple oxidation states and
forms an ion that is colored when in solution?
A) F
B) Zn
C) C1
D) Cu
Answer:
Copper
Explanation:
Before the work of Albert Einstein and other prominent scientists of the early 1900's, the predominant view among
physicists was that light is:
Answer:
wave
Explanation:
DEFINITION: ABILITY OF A SUBSTANCE TO BE DISSOLVED
Answer:
Solubility
Explanation:
If its not that the answer is Dissolvable.... you didn't give a word bank.
:))))))))))
Write a balanced equation for the complete oxidation reaction that occurs when glucose (C6H12O6) reacts with oxygen. Use the smallest possible integer coefficients.
Answer:
C₆H₁₂O₆ + 6O₂ —> 6CO₂ + 6H₂O
Explanation:
Glucose (C₆H₁₂O₆) react with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O).
The equation can be written as follow:
C₆H₁₂O₆ + O₂ —> CO₂ + H₂O
The above equation can be balance as illustrated below:
C₆H₁₂O₆ + O₂ —> CO₂ + H₂O
There are 6 atoms of C on the left side and 1 atom on the right side. It can be balance by putting 6 in front of CO₂ as shown below:
C₆H₁₂O₆ + O₂ —> 6CO₂ + H₂O
There are 12 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 6 in front of H₂O as shown below:
C₆H₁₂O₆ + O₂ —> 6CO₂ + 6H₂O
There are a total of 8 atoms of O on the left side and a total of 18 atoms on the right side. It can be balance by 6 in front of O₂ as shown below:
C₆H₁₂O₆ + 6O₂ —> 6CO₂ + 6H₂O
Now, the equation is balanced.
