When a substance changes from solid to liquid form, the bonds between the particles become
stronger.
True
False
Answer:True
Explanation:
Answer:
False
Explanation:
Its false, the bonds become weaker.
In a reaction process a company expected to make 6.8
tonnes of ammonia but the yield of ammonia was
only 4.2 tonnes. Calculate the percentage yield of
ammonia.
1
61.8 %
2
0.6 %
3
16.2%
4
6.2 %
Answer:
1) 61.8%
Explanation:
(4.2/6.8)*100
how many grams are in 5.12 moles of Al
Answer:
138.14547456
Explanation:
How many moles Aluminium in 1 grams? The answer is 0.037062379468509.
We assume you are converting between moles Aluminium and gram.
You can view more details on each measurement unit:
molecular weight of Aluminium or grams
The molecular formula for Aluminium is Al.
The SI base unit for amount of substance is the mole.
1 mole is equal to 1 moles Aluminium, or 26.981538 grams.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between moles Aluminium and gram.
Answer:
[tex]\boxed {\boxed {\sf About \ 138 \ grams \ of \ aluminum}}[/tex]
Explanation:
To convert from moles to grams, we must use molar mass.
This can be found on the Periodic Table, so look for the symbol for aluminum: Al
Al: 26.981538 g/molWe can use this number as a ratio.
[tex]\frac { 26.981538 \ g \ Al} { 1 \ mol \ Al}[/tex]
Multiply by the given number of moles: 5.12
[tex]5.12 \ mol \ Al *\frac { 26.981538 \ g \ Al} { 1 \ mol \ Al}[/tex]
Multiply. The moles of aluminum will cancel.
[tex]5.12*\frac { 26.981538 \ g \ Al} { 1}[/tex]
[tex]138.145475 \ g \ Al[/tex]
Round. The original measurement of moles has 3 significant figures, so our answer must also have 3 sig figs.
For the number we calculated, that is the ones place. The 1 in the tenth place tells us to leave the 8.
[tex]138 \ g \ Al[/tex]
There is about 138 grams of aluminum in 5.12 moles.
How often is Earth's surface being changed?
1 every hundred years
2 never
3 at all times
4 once a year
Answer:
I believe it is 3.
Explanation:
because the earth is constantly shifting.
How much energy is required to heat up a Styrofoam cup from 25oC to 40oC? The mass of the cup is 20 grams and the specific heat capacity of Styrofoam is 1.1 J/(g *oC). Group of answer choices
Answer:
[tex]Q=330J[/tex]
Explanation:
Hello!
In this case, since the energy involved during a heating process is calculated as shown below:
[tex]Q=mC(T_2-T_1)[/tex]
Whereas we consider the mass, heat capacity and temperature; we are able to plug in the given data to obtain:
[tex]Q = 20g*1.1\frac{J}{g\°C}(40\°C-25\°C)\\\\Q = 330J[/tex]
Best regards!
Which force is equal but opposite to the one shown?
Answer:B
Explanation:
Section
1
2
7)
Given the equation representing a reaction:
203Pb + 5921 TECn + on
3
4
5
Which type of reaction is represented by this equation?
6
A)
neutralization
8
-9
B)
polymerization
C)
substitution
10
11
12
13
= 14
- 15
16
-17
D)
transmutation
18
19
20
21
Answer:
a
Explanation:
neutalize acidity level
Explain what is a chemical reaction.
Answer:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
Answer:
a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
Here's an example. When you burn wood, It releases Carbon dioxide, water vapor, and ashes. It just depends what chemicals you use ^^
Crystal needs more protein in her diet. Which food sources will best provide the building blocks she needs?
Tons
Problems
If a -1 ion has 10 electrons, what element is it?
Answer:
sodium ion
Explanation:
And, so if we gots a representation of Na+ , or Cl− , we know that for the sodium ion, while there are 11 charged nuclear particles (how do we know this?), there are 10 charged extranuclear particles, 10 electrons.
brainliest pls
in a 35.0 L tank of N2O3 at STP, how many molecules are there?
Answer:
[tex]9.40x10^{23}molecules[/tex]
Explanation:
Hello!
In this case, since we are given the volume of N2O3 and pressure and temperature for the STP (1.00 atm and 273.15 K), we can compute the moles, considering the ideal gas equation as shown below:
[tex]PV=nRT\\\\n=\frac{PV}{RT} \\\\n=\frac{1atm*35L}{0.08206\frac{atm*L}{mol*K}*273.15K}\\\\n=1.56mol[/tex]
Now, by using the Avogadro's number it is possible to compute the molecules of this case in 1.56 moles:
[tex]molecules=1.56mol*\frac{6.022x10^{23}}{1mol} =9.40x10^{23}molecules[/tex]
Best regards!
A simple circuit with a battery connected to a buzzer by electrical wires is placed on a table. When the buzzer sounds, the table begins to ratte. Which form of energy makes the table rattle?
chemical
ОО
electrical
heat
mechanical
Answer:
Mechanical
Explanation:
mechanical energy:
energy that an object has
because of its motion or
position
Close friendships at work are often bad for the business. true or false and why?
Explanation:
true true true true true true
Answer:
False
Explanation:
Because that is your friend and your friend is helping you in other things that you need some help.
How many moles of iron (Fe) will be produced from 6.20 moles of carbon monoxide (CO) reacting with excess iron (III) oxide (Fe2O3)?
If you can, please show the work because I really don't understand and ya girl is struggling. thank you guysss <33
Answer:
4.13 moles of Fe
Explanation:
Step 1: Write the balanced equation
3 CO + Fe₂O₃ ⇒ 2 Fe + 3 CO₂
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of CO to Fe is 3:2.
Step 3: Calculate the moles of Fe formed from 6.20 moles of CO
We will use the previously established molar ratio.
6.20 mol CO × 2 mol Fe/3 mol CO = 4.13 mol Fe
Which phrase best describes an apple?
a. heterogeneous mixture
b. homogeneous compound
c. heterogeneous substance
d. homogeneous mixture
Which of the following chemical formulas show three molecules of a compound that has one
NEED FAST
atom of mercury and two atoms of bromine
1. 3Mc2Br
2. Hg3Br2
3. 3McBr2
4.McBr23
5.3HgBr2
6.3Hg2Br
The chemical formula : 3HgBr₂(Mercury(II) bromide)
Further explanationGiven
The chemical formulas of Mercury and Bromine
Required
The appropriate chemical formula
Solution
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
The number of molecules is determined by the coefficient in front of the compound
the number of atoms is determined by the subscript after the atom and the coefficient
Three molecules⇒ coefficient = 3
one atom of Mercury ⇒Hg
two atoms of Bromine ⇒ Br₂
The chemical formula : 3HgBr₂
Jesim wants to help Nancy understand the movement that happens during one Earth year, Jassim holds a small globe representing Earth, and Nancy holds a large ball representing the Sun. What should Jessim do to show
Nancy what happens during one Earth year?
Jessim should not move except to slowly spin the globe
Jesim should slowly spin the globe and walk away from Nancy
Jessim should have Nancy walk around him while spinning the ball
Jessim should spin the globe quickly while walking in a circle around Nancy
Answer:
The answer is D jessim should spin the glove quickly while walking in a circle around nancy.
Explanation:
A pure sample of gold has a volume of 25.0 cm3 and a mass of 483 g. What is the density of gold?
Answer:
19.4 g/cm^3
Explanation:
Where did the zebra mussels originally come from?
Answer:
he ocean
Explanation:
They are sea cretures who origanly lived in water (or near i forgot)
HELP help HELP!!!! Me ME me
The__is the source of energy used in photosynthesis?
A. Sun
B. Radiant energy
C. Chemical energy
If you can help I would really appreciate it!:)
Answer:
sun
Explanation:
source means where it comes from and the source of energy comes from the sun
What is the molar mass of ferric acetate, Fe(C,H,O2),?
Answer/Explanation:
193.96 g/mol
A patient is having trouble chewing their food, so the doctor orders a mechanical soft diet. As the dietician, you prepare a lunch for the patient. It includes chicken salad. What is the total caloric intake for a serving of chicken salad if each serving contains 2.2 g fat, 3.7 g carbohydrates, and 17 g protein (answer in Calories, kcal)?
the mass of 0.0321 moles of Ca (CN)2
The mass of Ca(CN)2 : 92,11 g/mol
Further explanationGiven
0.0321 moles of Ca(CN)2
Required
The mass
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
mol(n) = mass(m) : MW(molecular weight)
Input the value :
mass = mol x MW Ca (CN)2
mass = 0.0321 x 92,11 g/mol
mass = 2.957 g
100 POINTS AND BRAINLIEST FOR HELP
Write a paragraph that explains diffusion and osmosis and how it relates to the circulatory system. Each sentence should be typed in the appropriate color.
It should include an introductory sentence that restates the question. A sentence that explains diffusion. A sentence that explains osmosis and at least 2-3 sentences that explain the relationship between diffusion, osmosis and the circulatory system. And, lastly, a conclusion sentence.
Materials are transferred between individual cells and their internal environment through the cell membrane by diffusion, osmosis, and active transport. During diffusion and osmosis, molecules move from a higher concentration to a lower concentration. Osmosis: Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. This would be the diffusion.
Hey
here to help and to serve
Answer:
lol thx
Explanation:
Determine the [OH-] concentration of a 0.123 M Sr(OH)2 solution at 25°C
Answer:
0.246M
Explanation:
0.123M x 2 = 0.246M
Due to Sr(OH)2 has the coefficient of 2.
The [OH⁻] concentration for 0.123 M Sr(OH)₂ solution at 25°C is 0.246M
What is Concentration ?The amount of a solution's solute to either the solvent or the entire solution is called Concentration.
The most common way to express concentration is in terms of mass per unit volume.
The solute concentration, on the other hand, can be expressed in moles or units of volume.
We assume
Sr(OH)2 is a strong base, such that
Sr(OH)₂(s) + H₂O(l) −−−→Sr²⁺(aq)+2OH⁻aq)
The [OH⁻] concentration for 0.123 M Sr(OH)₂ solution at 25°C
= 2 * 0.123
= 0.246 M
As two [OH⁻] are being produced by Sr(OH)₂ .
The [OH⁻] concentration for 0.123 M Sr(OH)₂ solution at 25°C is 0.246M.
To know more about Concentration
https://brainly.com/question/10725862
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__C + __H2O → __CO + H2
Answer:
It is balanced
Explanation:
There is 1 Carbon, 2 Hydrogen, and 1 Oxygen on the right and 1 Carbon, 1 Oxygen and 2 Hydrogen on the left. This equation is balanced.
Different energy sources can be used to generate electricity. Which of the following uses a nonrenewable energy source to generate electricity?
a hydroelectric power plant
a generator that burns wood
a power plant that runs on oil
a windmill connected to a generator
Answer:
a power plant that runs on oil
Explanation:
A generator a power plant that runs on oil uses non-renewable sources of energy to generate electricity.
Non - renewable energy is an energy source that cannot be replenished within a short period of time. It takes geologic time scales to form such energy sources.
Oil is a fossil fuel and a non-renewable source of energy.
As it is used, the reserve is being depleted.
Answer:
a power plant that runs on oil
At what temperature in Kelvin will 0.1243 moles of fluorine exert a pressure of 2.02 atm at a volume of
0.625 L? Answer: 124K
How do I solve this?
Answer:
Explanation:
The formula would be PV=nRT but since were trying to find temp. the formula becomes T=PV/nR (n is the # moles and R is the ideal gas constant which equals 0.0821 for this)
The formula becomes T= 2.02 x 0.625 divided by 0.1243 x 0.0821 then just solve that in the calculator and u get 123.7K or 124K