Answer:
.4 moles
Explanation:
this is if it's 35 grams
A gas
A. has a definite shape but no definite volume.
B. Has both a definite shape and a definite volume.
C. Has a definite volume but no definite shape.
D. Has no definite shape and no definite volume.
Answer:
D
Explanation:
Has no definite shape and no definite volume
Why didn't you just clean the spill with water?
Answer:
if you did it would probably make it bigger...
Explanation:
:)
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Answer:
Letter C is the answer Hope it helps!
Molecules in a substance change into a new kind of molecule during a phase change.
Answer:
A phase change is occurring; the liquid water is changing to gaseous water, or steam. On a molecular level, the intermolecular forces between the water molecules are decreasing. The heat is providing enough energy for the water molecules to overcome these attractive forces.
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The phase transition takes place at the molecular level by changing the strength of intermolecular forces between the molecules.
What is phase change?Phase changes can be defined as the physical processes of transition between a state of a medium, identified by some parameters. These changes in states of matter that can be written as liquid, gas, solid, and plasma.
A particular phase in a thermodynamic system exhibits uniform physical properties. During a phase transition, some properties of the medium change, because of the change in external conditions, such as temperature, and pressure.
In a solid state, the molecules are compactly bound by a strong force of attraction. In the liquid state, the molecules have lesser attraction forces. The phase changes depend upon the temperature and pressure.
Therefore, phase transitions occur on a molecular level as the alteration in the strength of intermolecular forces.
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Why do women have more reactions to vaccines?
Experts say this isn’t unusual with vaccinations because the estrogen in women’s bodies is designed to elicit a stronger immune response.
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HELP ME PLEASE!!!!! I NEED TO GET THIS RIGHT I CANT FAIL
The following reaction shows the products when sulfuric acid and aluminum hydroxide react.
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
The table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory.
Initial Mass and Yield:
Sulfuric Acid Aluminum Hydroxide
Initial Amount of Reactant 40 g 1.5 g
Theoretical Yield of Water from Reactant 14.69 g 10.38 g
What is the approximate amount of the leftover reactant? (4 points)
a.11.73 g of sulfuric acid
b.10.33 g of sulfuric acid
c.11.12 g of aluminum hydroxide
d.13.67 g of aluminum hydroxide
Answer:
c.11.43 g of aluminum hydroxide
Explanation:
Which sentences describe decomposers in a food chain?
They are the final link in the energy flow in a food chain or a food web. They are fungi and animals that feed on dead organic matter. Plants
produce food or energy from raw materials. Plants are also known as autotrophs because they can produce organic compounds from inorganic
chemicals. Bacteria, fungi, worms, and snails recycle the garbage of dead matter and give back nutrients into the ecosystem.
Answer:
hey are the final link in the energy flow in a food chain or a food web. They are fungi and animals that feed on dead organic mattet.
Explanaticuz im naruto uzamaki
What does efficient mean in your own words
Answer:
llo
Explanation:
efficent: well orgainzed, completed with mimumin amount of effort
capable is the correct answer accept it surely
when 4.73g of solid was heated, the residue weighed 4.10g 320 cubic centimetre of gas( at RTP) was evolved. calculate the molecular mass of the gas
Answer:
48 g/mol
Explanation:
Step 1: Calculate the mass of the gas (m)
According to the law of conservation of mass, the mass of the solid before the decomposition must be equal to the sum of the masses of the solid residue and the gas
mSolid = mResidue + mGas
mGas = mSolid - mResidue = 4.73 g - 4.10 g = 0.63 g
Step 2: Convert 320 cm³ to L
We will use the conversion factor 1 L = 1000 cm³.
320 cm³ × 1 L/1000 cm³ = 0.320 L
Step 3: Calculate the moles of gas (n)
The gas is at room temperature (298.15 K) and room pressure (1 atm). We can calculate the moles of gas using the ideal gas equation.
P × V = n × R × T
n = P × V/R × T
n = 1 atm × 0.320 L/(0.0821 atm.L/mol.K) × 298.15 K = 0.0131 mol
Step 4: Calculate the molecular mass of the gas (M)
We will use the following expression.
M = m/n = 0.63 g/0.0131 mol = 48 g/mol
what explains the bonding in a compound made from carbon and hydrogen
1) ch4 because every hydrogen gets two electrons to bond
2) ch4 because 8 electrons are shared in this molecule
Answer:
2) ch4 because 8 electrons are shared in this molecule
Explanation:
The bond between carbon and hydrogen in the molecule; CH4 is a covalent bond. This bond involves sharing of electrons. Carbon has a valency of 4 and needs four more electrons to complete it's electronic configuration. These 4 electrons are taken care of by the 4 hydrogen atoms which each have a valency of 1.
A balloon is filled with 30.0 L of helium in the morning when the temperature is 25.00 ℃. By noon the temperature has risen to 55.00 ℃. Determine the new volume of the balloon. *
Answer:
33.0 L
Explanation:
Step 1: Given data
Initial volume of the balloon (V₁): 30.0 LInitial temperature (T₁): 25.00 °CFinal volume of the balloon (V₂): ?Final temperature (T₂): 55.00 °CStep 2: Convert the temperatures to the Kelvin scale
We will use the following expression.
K = °C + 273.15
T₁: K = 25.00°C + 273.15 = 298.15 K
T₂: K = 55.00°C + 273.15 = 328.15 K
Step 3: Calculate the final volume of the balloon
If we assume ideal behavior, we can calculate the final volume of the balloon using Charles' law.
V₁/T₁ = V₂/T₂
V₂ = V₁ × T₂/T₁
V₂ = 30.0 L × 328.15 K/298.15 K = 33.0 L
A white crystalline salt conducts electricity
when it is melted and when it is dissolved
in water. Which type of bond does this salt
contain?
A. ionic
B. metallic
C. covalent
D.
network
How many moles of Cu are in 1.48 × 1025 Cu atoms?
24.6 mol Cu
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
MolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.48 × 10²⁵ atoms Cu
[Solve] moles Cu
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.48 \cdot 10^{25} \ atoms \ Cu(\frac{1 \ mol \ Cu}{6.022 \cdot 10^{23} \ atoms \ Cu})[/tex][DA] Divide [Cancel out units]: [tex]\displaystyle 24.5766 \ mol \ Cu[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
24.5766 mol Cu ≈ 24.6 mol Cu
what is the volume, in liters, of 5.500 mol of C3H3 gas at STP
Answer:
123.2 Liters.
Explanation:
At STP (T = 273K & P = 1atm), one mol of any gas will occupy 22.4 liters.
With the above information in mind, we can calculate how many liters would 5.500 mol of gas occupy:
5.500 mol * 22.4 L / mol = 123.2 L
So 5.500 moles of C₃H₃ would have a volume of 123.2 liters at STP.
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elements have similar characteristics?
Periodic TaBle
oF The Elements
Answer:
See attachment.
Explanation:
Elements that are in the same group will definitely possess similar characteristics because they tend to have the same valence electron which determines their reactivity.
On a periodic table, elements in the same group can be found arranged on the same column in the periodic table.
Therefore the two elements that have similar characteristics are those two elements you can see on the same column in group 2. See the two elements indicated in the attachment below.
What are the spectators ions in this reaction?
Answer:
Option C. Na⁺(aq) and Cl¯(aq)
Explanation:
From the question given above, we obtained the following:
Na₂SO₄(aq) + CaCl₂(aq) —> CaSO₄(s) + 2NaCl(aq)
Ionic Equation:
2Na⁺(aq) + SO₄²¯(aq) + Ca²⁺(aq) + 2Cl¯(aq) —> CaSO₄(s) + 2Na⁺(aq) + 2Cl¯(aq)
From the ionic equation above, we can see that Na⁺(aq) and Cl¯(aq) are present on both side of the equation.
Therefore, Na⁺(aq) and Cl¯(aq) are the spectator ions because they did not participate directly in the reaction.
Can the decay half-life of a radioactive material be changed?
Answer:
Yes.....
Explanation:
the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of radiation. ... It is impossible to predict when an individual radioactive atom will decay.
Write a skeleton equation for the reaction in which aqueous sodium chloride
reacts with aqueous silver nitrate to produce aqueous sodium nitrate and solid
silver chloride.
Answer:
Explanation:according to question:
. Nacl (aq) + AgNO3 (aq) --> AgCl
(s) + NaNO3 (aq).balanced.
NEED HELP ON THIS NOW PLEASE
Answer:
A. Bees bringing pollen from the flower of one plant to the flower of another plant.
Explanation:
Genetic diversity in organisms is enhanced by the process of sexual reproduction due to the meiotic process that the participant organisms undergo to produce gametes. A process unique to meiosis called CROSSING OVER ensures that the alleles of genes are recombined in the GAMETE or sex cells.
According to this question, POLLINATION, which is the transfer of pollen from a male flower to a female one, will lead to sexual reproduction via fertilization. However, a cross-pollination, which requires a pollinator like the bees in this question will ensure the most genetic diversity among the offsprings.
Small particles that settle out of wind and water are called.
Which of these is a carbohydrate?
1. C6 H12 O6
2. C6 H6 O12
3. C6 H13 O2 N
4. C3 H7 O2 Ns
Answer:
C6H12O6
Glucose
Explanation:
Glucose is a monocarbohydrate
carbohydrates always have only C, H, and O
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What is the electron configuration for
beryllium (atomic number = 4)?
А
B
1s22s
2.
2s22p
2
Answer:
1s22s2
Explanation:
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A. C
B. B
C. A
D. D
Answer:
b
Explanation:
Answer:
answer b I think so I'm.not clear about it ,I think its CRT ans plz follow me
The bond angles around a carbon in a
triple bond are
and it
is
hybridized
A. 180, sp?
B. 120, sp
C. 180, sp
D. 120, sp?
Enter
The bond angles around carbon in the triple bond are 180 degrees and it is sp hybridized. option B is correct
What is sp hybridization?This hybridization process involves mixing the valence s orbital with one of the valence p orbitals to yield two equivalent sp hybrid orbitals that are oriented in a linear geometry.
The set of sp orbitals appears similar in shape to the original p orbital, but there is an important difference. The number of atomic orbitals combined always equals the number of hybrid orbitals formed.
The p orbital is one orbital that can hold up to two electrons. The sp set is two equivalent orbitals that point 120° from each other. The two electrons that were originally in the s orbital are now distributed to the two sp orbitals, which are half filled.
Therefore, due to the sp hybrid and 120-degree angle option B is correct
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please help due in 2 minutes
Answer:
1
Explanation:
the answer is the first option because it's at less of an incline than the others, hope this helps!
It is device used to measure thee temperature of food/fish
I am an element that has 4 valence electrons that are present in my third energy level. Who am I?
Answer:
silicone (Si) is the answer
A student performed a similar experiment we have done, with Ag and O to produce silver oxide.
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Mass of crucible, lid, and silver oxide: 31.080 g
Use the above data to calculate the moles of the metal used in this experiment. your answer must include correct significant figures and unit.
Answer:
0.0153 mol
Explanation:
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Number of moles = Mass /Molar mass
Mass of Silver = Mass of crucible, lid, and silver - Mass of crucible and lid
Mass of siilver = 30.958 g - 29.307 g
Mass of silver = 1.651 g
Molar mass of silver = 107.868 g/mol
Number of moles = 1.651 g / 107.868 g/mol
Number of moles = 0.0153 mol
A human ear is shaped in a way that focuses sound.
A. True
B. False
the Solution is the answer A.True