Answers
Related Questions
Based on the data, summarize Alicia's results.
Describe how stirring the soup affects heat transfer.
Answers
Balance the chemical equation Au,O, --> Au + O2
Answers
Explanation:
Don't you mean ½O2+Au-->AuO
.00278kg • ____= ____mg
Answers
Answer:
blank space one- 0
blank space two- 0
Explanation:
If you observe a Full Moon on Jan 12th, on what date would you observe the next New Moon?
Answers
Answer:
January, 28th.
Explanation:
yeet
A population of large predator
fish has recently grown out of
control. How will this impact
the ecosystem?
Answers
Answer:
they will eat a lot of fish and make other animals go hungry
Explanation:
logic
As the population of large predator fish has grown out of control it will require more supply food due to which population of small fishes will decrease leading to disturbance in ecosystem.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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A sample of chlorine gas has a volume of 6500 ml at STP. What will the volume be if the temperature is increased to 50.°C and the pressure is decreased to 0.25 atm?
Answers
Answer:
The volume will be 30759mL
Explanation:
To solve this question we need to use the combined gas law:
P₁V₁/T₁ = P₂V₂/T₂
Where P is pressure, V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas
Computing the values (STP are 1atm and 273.15K):4
P₁ = 1atm
V = 6500mL
T₁ = 273.15K
P₂ = 0.25atm
V₂ = ?
T₂ = 273.15K + 50°C = 323.15K
1atm*6500mL/273.15K = 0.25atmV₂/323.15K
V₂ = 30759mL
The volume will be 30759mLBased on what you know about prokaryotic cells and
eukaryotic cells, the bacterial cell shown in the Venn diagram
below is a _____________________ cell while the fungal cell
is a __________________________ cell.
Answers
Answer:
based on what you know about prokaryotic cells and eukaryotic cells the bacterial cell shown in the venn diagram below is a prokaryotic cell while the fungal cell is a eukaryotic
Explanation:
hope it help and if it doesnt sorry ;)
a base is defined as a compound that produces
Answers
How does electronegativity play a role in the strength of intermolecular forces.
Answers
Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules and these depend on strength of electronegativity of molecule.
What is intermolecular forces of attraction?Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.
Size of electronegative molecule is small so, if any other molecule or molecule come into contact with this molecule then this molecule attract the electron of other molecule very efficiently and therefore the force between the molecule increases.
Thus intermolecular forces of attraction is directly proportional to the strength of electronegativity.
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What is the volume occupied by 3.00mol of oxygen gas at STP?
Answers
Volume = 24 x 3
Volume = 72dm^3
What do scientists do?
O A. They make sure all facts fit scientific theories.
O B. They learn about the world through observation.
O C. They use their knowledge to make public policy.
O D. They make ethical
Answers
what is neutralization process
Answers
Explanation:
when an acid reacts with base and they cancel out defects of each other and as a product salt and water are produced this reaction is called a neutralization process
PLEASE ANSWER ASAP ITS TIMED
2Al + Fe ----> Al2O3 +2Fe
For the reaction above, the mole ratio Aluminium to Aluminuim Oxide is
a.1:1
b.2:1
c.1:2
d.2:2
Answers
The mole ratio Aluminium to Aluminum Oxide is 2 : 1
Further explanationGiven
Reaction
2Al + Fe ----> Al2O3 +2Fe
Required
The mol ratio
Solution
If we look at the reaction above, there is an element missing from the reactant i.e oxygen, because the number of atoms and elements involved in the reaction should be the same between the reactants and products.
So the possible and balanced reactions are:
2Al(s) + Fe₂O₃ (s) → Al₂O₃ (s)+ 2Fe (s)
From this reaction the ratio of Al: Al₂O₃ can be determined, which is 2: 1
PLEASE HELP DUDE SOON
The outermost shell is the
energy level that
contains in an atom.
Answers
Answer:
True hope this helps
Explanation:
List these from smallest to largest- Molecules, Mixtures, Atoms
Answers
Atoms Molecules mixtures
answer the pic below
Answers
Answer: 18
Explanation:
i think so
Calculate the amount of heat released when one bottle (250 g) of water is cooled from 25°C to 30°C. The specific heat of water is 4.18 J/g°C.
Answers
Answer: the answer is a
Explanation: glad we have the same troubles Rn hahah
Through which material do sound waves tend to move fastest
A:Cold Air
B:Metal
C:Water
D:Warm air
Answers
Answer:
METAL
Explanation:
Answer:
The answer would be B. Metal
Explanation:
Sound travels the fastest in solids
What is a neutralization reaction?
O A. A reaction in which the product is either acidic or basic
O B. A reaction that involves neutral reactants
O c. A reaction in which the reactants are a salt and water
O D. A reaction that removes essentially all Ht and OH
Answers
Answer:
D or A your choice
Explanation:
uhhh didnt u- nvm
A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate wate
How many moles of phosphoric acid are there in
658 x 10 28 formula units
of phosphoric acid, H3PO4
Answers
Answer:
109.3 × 10⁵ mol
Explanation:
Given data:
Number of moles of phosphoric acid = ?
Number of formula units = 658 × 10²⁸
Solution:
The given problem will solve by using Avogadro number.
The number 6.022 × 10²³ is called Avogadro number.
1 mole contain 6.022 × 10²³ formula units,
658 × 10²⁸ formula units × 1 mol / 6.022 × 10²³ formula units
109.3 × 10⁵ mol
HELP PLEASE!!!!!!!! I WILL MARK BRAINLIEST!!!!!!!
Answers
Answer: option d
MARK BRAINLIEST!!!!!!
15 pts! Explain how the absorption of energy (heating) affects the speed of the particles in a substance.
Answers
Answer:
See explanation
Explanation:
Temperature has been severally defined as the measure of the average kinetic energy of the molecules of a body. Heat is a form of energy that exists due to temperature difference.
Given a body whose molecules has a speed = (3RT/M)^1/2; this implies that for a given mass of the substance, the velocity of its particles depends on the temperature of the substance.
However, absorption of heat increases the temperature of the body. Therefore, when heat is absorbed, the temperature increases and the speed of the particles of a substance increases according to the relation above.
What does it mean for a material to be brittle?
A. It bends easily when pressure is applied.
B. It breaks when pressure is applied.
C. It changes shape when pressure is applied.
D. It stretches into thin strands when pulled.
Answers
Answer:
B. it breaks when pressure is applied.
Select the correct answer.
Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
OA
carbon + oxygen + carbon dioxide
OB.
carbon + oxygen - carbon dioxide
O c.
carbon dioxide. - carbon + oxygen
OD.
carbon dioxide + carbon - oxygen
Answers
Answer:
The answer is option OB.
Answer: B) carbon + oxygen - carbon dioxide
Explanation: The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon-oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140-pm length of a typical single C–O bond, and shorter than most other C–O multiply-bonded functional groups such as carbonyls. Since it is centrosymmetric, the molecule has no electric dipole moment. As a linear triatomic molecule, CO2 has four vibrational modes as shown in the diagram. In the symmetric and the antisymmetric stretching modes, the atoms move along the axis of the molecule. There are two bending modes, which are degenerate, meaning that they have the same frequency and same energy, because of the symmetry of the molecule. When a molecule touches a surface or touches another molecule, the two bending modes can differ in frequency because the interaction is different for the two modes. Some of the vibrational modes are observed in the infrared (IR) spectrum: the antisymmetric stretching mode at wavenumber 2349 cm−1 (wavelength 4.25 μm) and the degenerate pair of bending modes at 667 cm−1 (wavelength 15 μm). The symmetric stretching mode does not create an electric dipole so is not observed in IR spectroscopy, but it is detected in by Raman spectroscopy at 1388 cm−1 (wavelength 7.2 μm).
All of the following are examples of suspensions except what?:
muddy water
Italian salad dressing
salt water
dust particles in the air
Answers
How many molecules are there in 2.3 grams of NH4SO2
Answers
Answer:
Explanation:
First, calculate the molar mass of NH4SO2. The molar mass can determine the number of moles. Then use Avogadro's number to calculate the number of molecules.
Key Steps:
Step 1. Calculate the molar mass of your compound
Step 2. Divide 2.3 grams by the molar mass of NH4SO2, this gives us moles
Step 3. Multiply by Avogadro's number (6.02x10^23) this gives you molecules.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.68×10²²molecules are there in 2.3 grams of (NH[tex]_4[/tex])[tex]_2[/tex]SO[tex]_4[/tex].
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole. we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
moles of (NH[tex]_4[/tex])[tex]_2[/tex]SO[tex]_4[/tex]= 2.3 grams ÷82.10g/mol
=0.028moles
number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)
number of atoms/molecules of (NH[tex]_4[/tex])[tex]_2[/tex]SO[tex]_4[/tex]=0.028 × 6.022×10²³
=1.68×10²²molecules
Therefore, 1.68×10²²molecules are there in 2.3 grams of (NH[tex]_4[/tex])[tex]_2[/tex]SO[tex]_4[/tex].
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For me its 10:00 but if someone in a class i can make it funny and not boring just gimmie link
Answers
How is coal mined? A. surface mines only B. underground and open pit C.underground mines only
Answers
Answer:
b
Explanation:
they have coal mines that go down deep into the earth but they also have mines called strip pits where they dig down and create a large creator in the earth insted of a mine shaft
Can somebody plz help me with some grade7science?
Answers
Provided here is an unbalanced chemical equation.
CuCl2 + Na3PO4 Cu3(PO4)2 + NaCl
Which of the following shows the product side of the correctly balanced equation?
please help!!!!
Answers
Answer:
3CuCl₂ + 2Na₃PO₄ → Cu₃(PO₄)₂ + 6NaCl
Explanation:
The reaction expression is given as:
CuCl₂ + Na₃PO₄ → Cu₃(PO₄)₂ + NaCl
To balance this expression, let us assign coefficients a, b, c and d;
aCuCl₂ + bNa₃PO₄ → cCu₃(PO₄)₂ + dNaCl
Conserving Cu: a = 3c
Cl: 2a = d
Na: 3b = d
P: b = 2c
O: 4b = 8c
let as c = 1, a = 3, d = 6 , b = 2
3CuCl₂ + 2Na₃PO₄ → Cu₃(PO₄)₂ + 6NaCl