The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
What is the volume, in liters, of 1.4 moles of CO2 gas at STP?
Answer:
22.4 L.
Explanation:
I need help with stoichiometry
the valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emiting the excess energy as light which property of metals is explained by this?
Answer:
Lustrous
Explanation:
Metals are lustrous which gives them a property of having Shiny surfaces
The valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emitting the excess energy as light show lustrous property of metals.
What are valence electrons?Valence electrons are defined as a negatively charged particle that can be shared or transmitted between atoms that is found in the outermost shell of an atom. Valence electrons have a crucial role in determining how an atom will behave. The electrical configurations of elements can be used to find valence electrons. The total number of valence electrons in that element is then determined by counting the number of electrons in the outermost shell.
When newly treated, polished, or broken, a material takes on a bright look and conducts electricity and heat reasonably well. Metals are typically ductile and malleable. These traits are the result of the metallic bond that connects the atoms or molecules of the metal.
Thus, the valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emitting the excess energy as light show lustrous property of metals.
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which of the following pairs of molecules can form hydrogen bonds between them? group of answer choices ch3oh and nh3 hcl and hi ch4 and h2o fo2 and ch2o h2 and o2
Answer:
Hydrogen Bond is the force that exists when H is directly connected to F, O, or N. HCl and HI cannot form hydrogen bonds between them. CH3OH and NH3 can form hydrogen bonds between them. CH4 and H2O cannot form hydrogen bonds between them.
Explanation:
Which of the following is the correct way to do it for 3753 Scientific notation
Answer:
b
Explanation:
it is b because it has 4 spots and that would be 3 zeros so it is to the 3rd power
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Write a balanced equation and name the products of the reaction CaCl2+Na3(PO4)
balanced equation - 3CaCl2 + 2Na3PO4 → Ca3(PO4)2 + 6NaCl
products - calcium phosphate and sodium chloride
Answer:
Ca3(PO4)2 + NaCl
Explanation:
calcium phosphate and sodium chloride
What is Jupiter’s strength of gravity?
Which molecule has ionic bond?
Mg
C0
NaCl
N0
NaCl - Chlorine has an outer shell with 7 electrons it wants to gain from the Sodium to become stable, whereas the Sodium wants to lose an electron to become stable.
How many grams of potassium sulphate are formed when 49g of sulphuric acid in solution are neutralised by potassium hydroxide?
the bradford assay only works at low protein concentrations
Answer:
Dilute the sample
Explanation:
The statement is not entirely accurate. The Bradford assay is commonly used to determine protein concentrations in a sample.
However, it is true that the Bradford assay is more accurate and reliable for measuring protein concentrations at low to moderate levels rather than at very high concentrations.
The Bradford assay is based on the binding of Coomassie Brilliant Blue dye to proteins. The dye undergoes a color change from brown to blue when bound to proteins, allowing for the measurement of protein concentrations. At low protein concentrations, the binding of the dye to proteins is well-calibrated and results in a linear relationship between protein concentration and color intensity, making it suitable for accurate quantification.
At high protein concentrations, the binding capacity of the dye may become saturated, leading to non-linear and less accurate measurements. The excess protein can also cause interference and affect color development. In such cases, dilution or alternative protein quantification methods may be more suitable, such as the BCA assay or the Lowry assay.
Therefore, while the Bradford assay can be used to measure protein concentrations across a range of concentrations, it is generally more reliable for low to moderate protein concentrations.
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Two samples of carbon come into contact. A heat transfer will occur between sample A and sample B. What must be true for heat to transfer from sample A to sample B
Polyester is a synthetic material used for many different purposes. It is produced from petroleum and natural gas. Producing polyester from these natural resources requires many steps and uses other chemicals that are potentially harmful. Polyester production also requires a lot of energy. Although polyester is not biodegradable, it is easily recyclable.
Which statement about synthetic materials is best supported by the example of polyester?
A.
Using synthetic materials has a negative impact on the environment, but using natural materials does not.
B.
Synthetic materials created from petroleum and natural gas are difficult to produce and to recycle.
C.
Materials that are created from natural resources affect the environment more than those that are not.
D.
Producing certain synthetic materials could have a greater environmental impact than disposing of them.
Answer:
A. Producing certain synthetic materials could have a greater environmental impact than disposing of them.
Explanation
I just did this question and got it right.
pls some one help
1 mark question
Answer:
The atomic number of Chlorine(Cl) is 17 and the electronic configuration is 2,8,7 with seven electrons in the valence shell.
Hope that helps. x
Answer:
See below
Explanation:
Chlorine has 17 electrons in it's shell.
(See the attached file to get the idea of what subshell would be filled first).
The accommodations:
s = 2 electrons
p = 6 electrons
d = 10 electrons
f = 14 electrons
Now, the electronic configuration of chlorine:
1s²2s²2p⁶3s²3p⁵
(2+2+6+2+5 = 17 electrons)
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807which tool would be best for measuring centimeters
A. Metric ruler
B. Balance scale
C. Meter scale
D. Measuring tape
Answer:
the answer is d
Explanation:
Use the pictures below to answer these questions: How does Magnesium become an ion? What is the charge of the Magnesium ion?
Answer:
Explanation:
The bottom picture shows a Mg atom. There are two electrons on the outside ring. When Mg reacts with something, these 2 electrons are given away. The top picture records that fact.
explain the concept of thekinetic molecular theory
Answer:
Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both Charles' and Boyle's Laws. The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only.
Explanation:
hope this helps! goodluck & enjoy the rest of ur day or night.
A student makes an aqueous solution of sodium hydroxide. Which statement correctly identifies the two ions present in the solute of this mixture?
The sodium ion is negative, and the hydroxide ion is positive.
The sodium ion is positive, and the hydroxide ion is positive.
The sodium ion is positive, and the hydroxide ion is negative.
The sodium ion is neutral, and the hydroxide ion is neutral
The two ions present in the solution are:
1. Sodium ion, Na⁺
2. Hydroxide ion, OH¯
The correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.
Ions are atoms or group of atoms which possess an electric charge.
Aqueous Sodium hydroxide, NaOH contains sodium ion and hydroxide ion.
The sodium ion is positive while the hydroxide ion is negative as illustrated below:
NaOH(aq) —> Na⁺(aq) + OH¯(aq)
From the illustration above, we can conclude that the correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.
Please see attached photo for further details
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In the following experiment, a coffee-cup calorimeter containing 100mL OF H2O is used.
Please provide more of the question so I am able to answer, but I do know that H20 has 0 calories.
What are some advantages to the use of hydrokinetic energy? What might be some disadvantages?.
Hydro-kinetic energy has advantages of being a clean, domestic, and renewable source with effective production. The disadvantages have been affected marine environment, along with water quality, and electricity on drought.
Hydro kinetic energy has been the energy produced by the movement of water bodies in the form of tides, waves, and oceanic current. The hydro-kinetic energy has been composed with high energy entrapped in the water bodies.
Some of the advantages of hydro-kinetic energy has been:
It has been a clean energy source and has been pollution free.It has been used as domestic source of energy.It has been a renewable source of energy.It has been produced by the tidal waves, thus can be produced effective and in need.Some of the disadvantages of hydro-kinetic energy has been:
Application of water bodies affects the marine environment.It has been producing low BOD and thereby affects the water quality.Conditions such as drought result in the affected electricity production.For more information about hydro-kinetic energy, refer to the link:
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Answer:
Some advantages to using hydrokinetic energy are that it can be used without mining materials, it is not associated with waste production, and that it does not contribute to air pollution. The main disadvantage to using hydrokinetic energy is the fact that it uses waves and tides as an energy source. This technology could not be used in all locations.
Explanation:
got it on edge sorry for the late response
Why does a light bulb turn in When you flip the switch to on?
Explanation:
Flipping a light switch to turn on a light means that the circuit with the light is being closed. When the switch is flipped the opposite way, to turn the light off, the circuit is being opened.
Answer:
You now have an open circuit
Explanation:
The circuit is closed when the switch is flipped the other way to turn off the light.
When 0.019 mol of aluminum sulfate are dissolved in enough water to make 905 milliliters of solution, what is the molar concentration of aluminum ions? Answer in units of M
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Liquid water can be separated into hydrogen gas and oxygen gas through electrolysis. 1 mole of hydrogen gas and 0.5 moles of oxygen gas is produced from 1 mole of liquid water collected in separate 10 L containers at 1 atm. Will the temperatures of the gases be equal? In one to two sentences, use the ideal gas law to explain your answer. (20 points)
Answer:
The ideal gas law specifies the mechanical behavior of ideal gases. It is capable of calculating the volume of gases produced or consumed.
In chemical equations, these equations are widely used to convert between volumes and molar quantities.
Use ideal gas law
Therefore
is the same for both So, = same for both.
When n increases, T decreases, so, n is 1 for and 0.5 for , implying that is hotter.
The temperatures of the gases will not be equal.
The ideal gas law specifies the mechanical behavior of ideal gases. It is capable of calculating the volume of gases produced or consumed. In chemical equations, this equation is widely used to convert between volumes and molar quantities. The ideal gas law states that the pressure, temperature, and volume of gas are related to each other[tex]PV=nRT[/tex]
∵V is the same for both
∴T= same for both.
When n increases, T decreases, so, n is 1 for hydrogen gas and 0.5 for oxygen gas ,implying that oxygen gas will have more temperature than hydrogen gas since its number of moles are lower than hydrogen gas.
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Rubia was given a type of inclined plane called a ramp in her science class. Her teacher told her that the ramp should have a mechanical advantage of 3.
Rubia pulled a block up the ramp, but afterward she calculated that the mechanical advantage of the ramp was 2.8 instead of 3. Her teacher said she did not make a mistake. What did Rubia calculate?
A.
the actual operating power of the ramp
B.
the actual mechanical advantage of the ramp
C.
the ideal mechanical advantage of the ramp
D.
the ideal operating power of the ramp
Answer: B. The actual mechanical advantage of the ramp.
Explanation:
The professor saying that the ramp SHOULD have a mechanical advantage of 3 indicates that that would be the ideal mechanical advantage. Since Rubia calculated it to be 2.8, that means that it is the acutal mechanical advantage. The actual advantage will be reduced from the ieal due to things like friction.
Where is the Oort cloud located
A) between the orbit of mars and orbit of Jupiter
B) in the different orbits between the sun and Neptune
C) behind the Kuiper belt at the farthest end of the solar system
D) all over the solar system in between the orbits of the planets
Answer:
If the Oort cloud exists which it most likely does it would be C
Explanation:
give free 18 points again just answer yes or no
is einstein a scientist? yes or no
Answer:
yes
Explanation:
Answer:
Yes
Explanation:
Albert Einstein is often cited as one of the most influential scientists of the 20th century. His work continues to help astronomers study everything from gravitational waves to Mercury's orbit
the sun`s blank is the layer that emits visible light
Answer: photosphere.
Explanation:
The part of the Sun commonly called its surface is the photosphere. The word photosphere means "light sphere" – which is apt because this is the layer that emits the most visible light. It’s what we see from Earth with our eyes.
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Static electricity is a ____ charge.
A. permanent
B. missing
C. flowing
D. temporary
I’m in science class right now and I need help on these questions
Answer:
hello
Explanation:
2. Which substance will form a solution with water? (Select all that app
string
sand
sugar
salt
Answer:
sugar and salt, as they can dissolve in water. Sugar and salt have a high solubility in water. So, sugar and salt can form a solution with water.
Explanation:
