Why didn't you just clean the spill with water?
Answer:
if you did it would probably make it bigger...
Explanation:
:)
can someone help with this please. i will give brainliest
Answer:
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.
The electromagnetic radiations consist of radio waves, microwaves, infrared ,Visible , ultraviolet, X rays and gamma rays arranged in order of increasing frequency and decreasing wavelengths.
The visible reagion contains Violet , Indigo , Blue , Green , Yellow , Orange and Red in order of increasimg wavelength and decreasing frequency.
How many grams of iron can be extracted from 1.55 kg of iron(III) carbonate?
How many atoms are present in one formula unit of barium acetate, Ba(C2H302)2?
Answer:
i think 15
Explanation:
Answer: About Barium Acetate
All metallic acetates are inorganic salts containing a metal cation and the acetate anion, a univalent (-1 charge) polyatomic ion composed of two carbon atoms ionically bound to three hydrogen and two oxygen atoms (Symbol: CH3COO) for a total formula weight of 59.05. Hopefully i helped
Explanation:
What is the electron configuration for
beryllium (atomic number = 4)?
А
B
1s22s
2.
2s22p
2
Answer:
1s22s2
Explanation:
Please help I will mark you brainiest
Answer:
Ethylene glycol is a syrupy liquid at room temperature whereas polyethylene glycol is a solid material. The main difference between ethylene glycol and polyethylene glycol is that ethylene glycol has a fixed value for molecular weight whereas polyethylene glycol has no fixed value for molecular weight.
what is the molarity of a solution with 130g of CoCl2 in 1/2 liter? (can you show the steps please)
Answer:
2M
Explanation:
M=mol/L
1. Find moles of CoCl2
mass of substance/molar mass = 130/129.833 = 1.001 mol
3. Substitute in molarity equation
M=(1.001/0.5)
M= around 2M
The molarity of a solution with 130g of CoCl2 in 1/2 liter is 2M
HOW TO CALCULATE MOLARITY:
The molarity of a solution can be calculated by dividing the number of moles of that substance by its volume:Molarity = no. of moles ÷ volumeFirst, we convert 130g of CoCl2 to moles as follows:Molar mass of CoCl2 = 129.84 g/molmoles = 130g ÷ 129.84g/molmoles of CoCl2 = 1molMolarity of CoCl2 solution = 1mol ÷ 0.5LMolarity of CoCl2 = 2MTherefore, the molarity of a solution with 130g of CoCl2 in 1/2 liter is 2M.
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What makes an acid acidic? a) Number of protons in a molecule b) Temperature c) Chemical structure d) Phase
Answer:
C.
Explanation:
Chemical structure
Convert 1.55 x 10^24 ATOMS OF CARBON TO MOLES OF CARBON
Answer:
2.57 moles of carbon
Explanation:
1 mole = 6.023x10^23 (this is called avogadro's number)
1/6.023x10^23
1.55x10^24 = 1.55x10^24/6.023x10^23 = 2.57 moles
this means, 1.55x10^24 atom contains 2.57 moles of carbon
Water’s unique properties, high heat capacity, high density, solid phase less dense than liquid phase can be attributed to
A. The shape of the molecule
B. The polarity of the molecules and hydrogen bonding between molecules.
C. The covalent oxygen hydrogen bonds in the molecule.
D. It’s formula h2o.
Answer:
B- The polarity of the molecules and hydrogen bonding between molecules.
Explanation:
Hope this helps:)
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
A solution contains 6 mg isopropanol dissolved in 2 kg H2O. The isopropanol concentration is?
Answer:
the concentration of isopropanol is 3 ppm.
Explanation:
The isopropanol concentration is
As we know that
Concentration = mass isopropanol ÷mass of water
= 6 mg ÷ 2 kg
= 3 mg/Kg
Now convert 3 mg/Kg to ppm.
As we know that
1 mg/Kg = 1 ppm
So,
3 mg/Kg = 3 ppm
Hence, the concentration of isopropanol is 3 ppm.
11) A fixed amount of gas at 25.0 °C occupies a volume of 8.66 L when the pressure is 629 torr. Use
Charles's law to calculate the volume (L) the gas will occupy when the temperature is increased to
112 °C while maintaining the pressure at 629 torr.
A) 1.93
B) 38.8
C) 11.2
D) 9.26
E) 6.70
Answer:
Option C. 11.2 L
Explanation:
From the question given above, the following data were obtained:
Initial temperature (T₁) = 25.0 °C
Initial volume (V₁) = 8.66 L
Final temperature (T₂) = 112 °C
Pressure = constant
Final volume (V₂) =?
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 25 °C
Initial temperature (T₁) = 25 °C +273
Initial temperature (T₁) = 298 K
Final temperature (T₂) = 112 °C
Final temperature (T₂) = 112 °C + 273
Final temperature (T₂) = 385 K
Finally, we shall determine final volume of the gas. This can be obtained as follow:
Initial temperature (T₁) = 298 K
Initial volume (V₁) = 8.66 L
Final temperature (T₂) = 385 K
Pressure = constant
Final volume (V₂) =?
V₁/T₁ = V₂/T₂
8.66/298 = V₂/385
Cross multiply
298 × V₂ = 8.66 × 385
298 × V₂ = 3334.1
Divide both side by 298
V₂ = 3334.1 / 298
V₂ = 11.2 L
Thus, the final (i.e new) volume of the gas is 11.2 L
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.
Describe the critical property ofelectrons in 2s versus 2p orbitals that causes the radial distribution functions of these orbitals to have different shapes about the nucleus such that 2s electrons effectively penetrate closer to the nucleus than do electrons in 2p orbitals.Then, write an expression for the potential energy function describing this effect.
Answer:
Answer is explained in the explanation section below.
Explanation:
Penetration refers to the proximity of electrons in an orbital to the nucleus.
Deeper-penetrating electrons have less shielding and therefore a higher Effective nuclear charge (Zeff), but they better shield other electrons.
To illustrate penetration, we may use the idea of Zeff, or effective nuclear charge. It's actually the difference between the number of charged protons and the number of shielded electrons. To put it another way, how effective the nucleus is at attracting electrons. Since they do not shield themselves, the core electrons penetrate the most and are exposed to the most strong nuclear charge.
The electron probability density is highest in the orbital's centre or nucleus for 28-orbitals.
In a multi-electron unit, the electron density near the nucleus of an atom for each shell and subshell of an electron is used to measure the nucleus penetration by an electron.
Since it has a higher electron density near the nucleus, the 2s electron penetrates the nucleus of the atom more than the 2p electron.
A 2s electron is less well shielded by the core electrons than a 2p electron because it can spend more time near the nucleus as a result of the penetration.
Mathematical Expression:
v = [tex]\frac{-Zeff * e^{z} }{r^{2} }[/tex]
A human ear is shaped in a way that focuses sound.
A. True
B. False
the Solution is the answer A.True
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.
Describe how to prepare 100.00 mL of a 0.250 M sodium chloride (NaCl) solution using sodium chloride powder.
Answer:
The answer to your question is given below.
Explanation:
We'll begin by converting 100 mL to L. This can be obtained as follow:
1000 mL = 1 L
Therefore,
100 mL = 100 mL × 1 L / 1000 mL
100 mL = 0.1 L
Next, we shall determine the number of mole of NaCl in the solution. This can be obtained as follow:
Volume of solution = 0.1 L
Molarity of NaCl = 0.250 M
Mole of NaCl =?
Molarity = mole / Volume
0.250 = mole of NaCl / 0.1
Cross multiply
Mole of NaCl = 0.250 × 0.1
Mole of NaCl = 0.025 mole
Finally, we shall determine the mass of 0.025 mole of NaCl. This can be obtained as follow:
Mole of NaCl = 0.025 mole
Molar mass of NaCl = 23 + 35.5
= 58.5 g/mol
Mass of NaCl =?
Mole = mass / Molar mass
0.025 = mass of NaCl /58.5
Cross multiply
Mass of NaCl = 0.025 × 58.5
Mass of NaCl = 1.46 g
Thus, to prepare the solution, weigh out 1.46 g of NaCl and dissolve in 1 L of water.
Calculate the number of moles in 42.15g of magnesium carbonate.
Answer:
0.5mol
Explanation:
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Please tell 4 strong alkalis and 4 weak alkalis
Red: weak
Orange: Strong
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
Prepare methoxyethane by Williamson's
synthesis method. What happens when methoxyethane is
treated with excess HI?
Help please it’s due in 3 minutes
Answer:
A
Explanation:
Both students are Pushing/Pulling towards the same direction meaning if enough force is applied the object will move into that direction
Why is the law of conservation of mass law and not a theory?
Answer:
In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.
Explanation:
That is what I think on the subject
A law is more specific, such as this particular description of matter, whereas a theory can be more general and often includes more of a why. Atomic Theory explains why the law of conservation of matter exists; in chemical reactions, atoms simply rearrange and have the same mass before and after.
What is a theory?A theory is a well-thought-out elaboration for natural-world anecdotes that has been built using the methodological approach and incorporates many facts and hypotheses.
A scientific law, in overall, is a description of an observed phenomenon. It does not explain why or what causes the phenomenon.
A scientific theory is an explanation for a concept. It is a common misconception that with enough research, theories can become laws.
A law is more precise, such as this detailed definition of matter, whereas a theory is more general and frequently includes more of a why.
Atomic Theory explains why the law of conservation of matter exists; atoms simply rearrange and have the same mass before and after chemical reactions.
Thus, that's why, the law of conservation of mass law and not a theory.
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What would happen to our solar system if the Sun had an even greater mass than it currently does?
Answer: If the Sun had an even greater mass then it currently does, it would have a larger gravitational pull and since it's heat would be closer to Earth, both by magnitude and gravity, life on Earth wouldn't be possible and life on Mars would be reality. Also, when the sun would explode, it would have a larger supernova and possibly create a white dwarf (something that only happens to red supergiant stars when they die), with a gravitational force so strong it wold have two beams of light coming out it's north and south poles (like a black hole).
I hope this helps!
Scientists have known for decades that humans were changing the global climate, but CO2 levels continue to rise every year. Why is it so difficult to reduce CO2 emissions? And what are the most promising solutions?
Answer:
See explanation
Explanation:
CO2 is often released by the combustion of fossil fuels. Fossil fuels are quite common sources of energy in our world today.
A lot power plants, vehicles, etc rely on energy produced as a result of the combustion of fossil fuels yielding carbon dioxide.
Hence, irrespective of the fact that CO2 leads to global warming but Nigeria is still ranked one of the greatest emitters of CO2.
The menace of rising CO2 leves can only be checked by stakeholders in the energy sector coming together to exploit renewable energy as a regular source of energy.
Which of the following pairs of elements would most likely form a molecular covalent bond?
Answer:
Oxygen and chlorine
Explanation:
oxygen and chlorine are most likely to form covalent compounds
Decreasing the volume of a gas would _______________. A. Decrease the temperature. B. Increase the amount liters. C. Decrease the moles. D. Increase the pressure.
Answer:
D. Increase the pressure.
Explanation:
Okay, lets break this down.
So first, lets imagine what decreasing the volume looks like. I like to think of it as squishing a balloon or water bottle. You condense what's inside it. So, with this in mind, lets look at the question.
A. Decrease temperature:
Does this happen when you squeeze something? It gets colder? No, that's not true. So we can eliminate that one.
B. Increase the liters:
Does this happen when you squeeze something? It gets larger? It takes up more space? No, that's not true. So we can eliminate that one.
C. Decrease in moles:
Okay, so moles is just a fancy way of saying "stuff." So does the amount of "stuff" decrease when you squeeze something? No, it just gets closer together. It's denser. So we can eliminate that one.
D. Increase the pressure:
Now we're getting somewhere!! When you squeeze a balloon, the pressure DOES increase because you are condensing the gas inside it. That's why balloons will pop if you squeeze too hard, the pressure is too great and has to escape. So yes, this is your answer.
Answer: D. Increase the pressure
What is the phase label on CI?
A. aq
B.
C. e
D. g
E. s
Answer:
Pubic hair smells bad
Explanation:
HELP ME PLS 20 POINTS
Answer:
1- Se 2-Na 3- I guess Si as well 4-Ar 5-O
Explanation:
Ionization energy increases as we go right in periodIonization energy increases as we go upwards in groupsAtomic radius increases as we go downwards in groupsAtomic radius increases as we go left in periodsAtomic radius decreases as we go right in periods so when atoms loses electron or more the smaller its radius becomes