Bad , fad is the answer check
If a 22.4 L volume of a sample of gas has a density of 0.900 grams/L at 1.00 atm and 0.00°C. Given
the following gases, which could it be?
A. Ne
B. CO
C. CO2
D. Kr
Answer:
Formula Weight of gas sample = 20.1 g/mole => Neon (Ne)
Explanation:
Use Ideal Gas Law formula to determine formula weight and compare to formula weights of answer choices.
PV = nRT = (mass/fwt)RT => fwt = (mass/Volume)RT = Density x R x T
Density = 0.900 grams/L
R = 0.08206 L·atm/mole·K
T = 0.00°C = 273Kfwt = (0.900g/L)(0.08206L·atm/mole·K )(273K)
= 20.1 g/mol => Neon (Ne)
2KClO3 —> 2KCl + 302 this equation represents both a ___ reaction AND a(n) ___ reaction.
A. combustion; decomposition
B. single replacement; combustion
C. combustion; oxidation-reduction
D. decomposition; oxidation-reduction
Answer:
option D--Decomposition; oxidation-reduction
Answer: A. Combustion; decomposition
Explanation: I took it on a quiz and got it right!
The diagram represents an atom of an element key
e = electron = 4
n = neutron = 5
p = proton = 4
Which symbol gives this information?
do not delete i just need help
Answer:
A. prokaryotic cell
Explanation:
We can easily identify the diagram as prokaryotic cell by the capsule shown. These organisms mostly have capsules.
which model would represent asexual reproduction? explain you reasoning
Answer:
Answer) The first box represent the budding type of asexual reproduction . In budding due to the cell divison at the particular place in the organism , new individual will produced.
Second picture represent the budding in hydra. Budding is also a asexual reproduction.
Third type of asexual reproduction is found in plants it is vegetative reproduction.
Fourth is Binary fission . This is also a type of asexual reproduction, in which nucleus dicied into two new daughter cell via mitosis.Explanation:
a double carbon-carbon bond is found in a molecule of
Answer:
ethene
Explanation:
as in ethene there is presence of double carbon which is commonly known as alkene group
What is the difference between Eukaryote and Prokaryote cells?
Why did me need to have the same molecules in each bottle? and what would have happened if we didn't use the same molecules?
Background info: We learned about molecules and how when a object is heated the air becomes less dense and the molecules is the opposite since they don't spread out and become more dense. What I mean with this question is in class we experimented by putting a bubble on a bottle and putting it on a hot water, the water made the molecules inside less dense and the bubble went up but when we tried cold water the bubble went down.
Answer:
it's just like doing a test grade on children if you give them different tests they might not come up with the same results, the molecules need to be the same or else the experiment will be even.
Explanation:
whenever water is hot the molecules will bounce really fast in the bottle, whenever water is cold he will go really slow in the bottle
Which element would have the greater difference between the first ionization energy and the second ionization energy
Answer:
Lithium has the greatest difference between its first and second ionization energies.
Charlotte has some copper sulfate solution. She wants solid copper sulfate. Which technique should she use?
Answer:
She should use the crystalization technique
Explanation:
First, the copper sulfate solution should be filtered to clear any impurities.
By heating the solution of copper sulfate on a china dish, the excess water in the solution evaporates and leaves behind a saturated solution of copper sulfate.
Upon cooling this saturated copper sulfate solution, crystals of solid copper sulfate will be formed on the china dish.
In solid form, copper sulfate appears in triclinic-shaped crystals.
The organelle that move proteins and other substances through the cell is the
Answer:
Endoplasmic reticulum
Explanation:
Segments of DNA found in chromosomes are called ——— ?
Answer:
Physically, a gene is a segment (or segments) of a chromosome. Functionally, a gene can play many different roles within a cell.
Explanation:
what year did ernest rutherford make his discovery
Answer:
May, 1911: Rutherford and the Discovery of the Atomic Nucleus.
Explanation:
Mark me brainly please.
write a ground state electron configuration for each neutral atom
Pb
Sr
U
N
Ag
Ti
Ce
CI
Hg
please help me
Answer:
Pb[lead] [Xe]4f^145d^106s^26p^2
U[uranium] 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4e^14 5d^10 6p^6
7s^2 5f^4
This notation can be written in core notation or noble gas notation by replacing the
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4e^14 5d^10 6p^6
7s^2 5f^4
with the noble gas [Rn].
[Rn]7s25f4
N[nitrogen] The full electron configuration for nitrogen is 1s^2 2s^2 2p^3.
Ti[titanium] Ti2+:[Ar]3d^2
Ti:1s^2 2s^2 2p^6 3s^2 3p^6 3d^2 4s^2
1s^2 2s^2 2p^6 3s^2 3p^5 = 17 electrons
(1) electron gain will result to a
negative charge (−), and
(2) electron loss will result to a positive charge (+),
1s^2 2s^2 2p^6 3s^2 3p^6 = 18 electrons
Hg[mercury] You should then find its atomic number is 80. It has a Xe core, so in shorthand notation, you can include [Xe]instead of
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6,
for 54 electrons. For the 6th row of the periodic table, we introduce the 4f orbitals, and proceed to atoms having occupied 5d orbitals. We, as usual, have the ns orbitals, and n=? for the 6th period?
Mercury has a regular electron configuration. It becomes:
[Xe]4f145d106s2
Explanation:
socratic.org helped me! I'm really sorry if this is wrong!
how many electrons does hydrogen need in order to have a full shell of valence electrons?
Answer:
One
Explanation:
In a hydrogen atom, the first outer shell only consists of two valence electrons, because it would already have one, the atom only needs one more.
It requires two electrons to completely occupy its outer shell, it frequently forms a single covalent bond with another atom. Because of this configuration, hydrogen can gain access to two electrons and completely occupy its valence shell.
What is Hydrogen?Hydrogen adheres to the duet rule because it only requires two electrons to completely occupy its valence shell. It deviates from the octet rule. Hydrogen only needs to form one bond. Because of this, H is always a terminal atom and never a central atom. Hydrogen is a chemical element with the symbol H and the atomic number 1.Hydrogen is the lightest element. Under normal conditions, hydrogen is a gas of diatomic molecules with the formula H2. It is colorless, odourless, tasteless, non-toxic, and extremely flammable. Hydrogen is a more environmentally friendly alternative to methane, also known as natural gas. It is the most abundant chemical element, accounting for 75% of the universe's mass. Water, plants, animals, and, of course, humans contain massive amounts of hydrogen atoms.To learn more about valence electron refer to:
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Which of the following elements is the smallest?
A. Strontium (Sr)
B. Beryllium (Be)
C. Calcium (Ca)
D. Magnesium (Mg)
An experiment was set up so that each test tube contained water at a pH of 6.3 and a pH indicator. Test tubes 1 and 2 also contained a common pond autotroph. Carbon dioxide dissolves in water and forms carbonic acid. After three days the four test tubes were found to have these results.What conclusion can be drawn from test tube 1 and test tube 2
Answer:
I think there was a picture with the results that you need to attach but regardless we need the results.
Explanation:
how many electrons can there be in the 2p subshell?
Answer:
6 possible electron can fit into the 2p subshell
I am an alkali metal located in the third period of the periodic table. Who am I?
Answer:
Magnesium
Explanation:
It's an alkali metal and is in the third period on the period table. I'm sure
The alkaline earth metal found in period 3 of the periodic table is magnesium.The lightest structural metal is magnesium (Mg), an alkaline-earth metal from Group 2 (IIa) of the periodic table.
I am an alkali metal located in the third period of the periodic table. Who am I?
Six chemical elements in Group 1, the periodic table's leftmost column, make up the alkali metals.They are francium (F), cesium (Cs), rubidium (Rb), potassium (K), sodium (Na), and lithium (Li) (Fr). One of the chemical elements in the third row of the periodic table of the chemical elements is referred to as a period 3 element. Magnesium is regarded as a metal because it is a member of group2.Acid and metals react to produce salt and hydrogen gas.As a result, magnesium interacts with diluted hydrochloric acid to produce magnesium chloride (salt) and hydrogen gas. Magnesium is a silvery, light metal that makes up 2% of the Earth's crust but is not present in nature.Only in combination with other elements like carbon, calcium, and oxygen, as in the common mineral dolomite, could this versatile element naturally arise. Magnesium is a cofactor in more than 300 enzyme systems that affect a variety of biochemical processes in the body, including as protein synthesis, blood glucose control, blood pressure regulation, and muscle and nerve function [1-3].Magnesium is necessary for the oxidative phosphorylation, glycolysis, and generation of energy. Magnesium supports muscle and neuron function as well as energy synthesis in the body, among many other vital functions.Typically, low magnesium levels don't result in any symptoms.On the other hand, persistently low levels can raise your risk of osteoporosis, type 2 diabetes, high blood pressure, and heart disease. For the majority of individuals, daily doses under 350 mg are safe.The adverse effects of magnesium can include nausea, vomiting, diarrhea, and upset stomach in some people.Magnesium is POSSIBLY SAFE UNTIL TAKEN IN VERY HIGH AMOUNTS (more than 350 mg daily).To learn more about magnesium refer
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1. How much energy is required to heat 32.5g of water from 34°C to 75°C?
Answer:
5.850 kJ (of heat energy)
Explanation:
What we need:
[] The mass of the material = m = 32.5g
[] The temperature change that occurs = ΔT = 43
() 75 - 34 = 43
[] The specific heat capacity of the material = c
() This is the amount of heat required to raise 1 gram of that substance by 1°C
() For water, this is 4.186Jg°C
The equation to use:
Q = m * c * ΔT
Q = 32.5 * 4.186 * 43
Q = 5849.935 J
Q = 5.850 kJ
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Answer:
[tex]\boxed {\boxed {\sf 5569.85 \ Joules}}[/tex]
Explanation:
We are asked to find how much energy is required to heat a sample of water.
We will use the following equation:
[tex]q= mc \Delta T[/tex]
The mass of the water is 32.5 grams. The specific heat capacity of water is 4.18 Joules per gram degree Celsius.
The change in temperature is the difference between the final temperature and the initial temperature. The water's temperature is raised from 34 degrees Celsius to 75 degrees Celsius.
ΔT= final temp - inital tempΔT = 75 °C - 34 °C = 41 °CNow we know all three variables:
m= 32.5 g c= 4.18 J/g °C ΔT = 41 °CSubstitute the values into the formula.
[tex]q= (32.5 \ g)(4.18 \ J/g \textdegree C)(41 \ \textdegree C)[/tex]
Multiply the first 2 numbers together. The units of grams cancel.
[tex]q= 135.85 \ \ J/ \textdegree C(41 \ \textdegree C)[/tex]
Multiply again. This time, the units of degrees Celsius cancel.
[tex]q= 5569.85 \ J[/tex]
5,569.85 Joules of energy are required.
What do you put in the cavity of an unstuffed turkey?
Explain why silver iodide, Agl, a compound used in
photography, has a much higher melting point than
vanillin, C,H,O3, a sweet-smelling compound used
in flavorings.
Answer:
Vanillin consists of molecules. The attraction between particles of silver iodide is stronger than the attraction between particles of vanillin.
The silver iodide a compound used in photography because,
It affected by light.It is easily stick on the surface of photographic plate or film.Why melting point of silver iodide has higher melting point than vanillin?The ionic compound is strong than covalent compound .So, ionic compound require more energy as compare to covalent compound to break their bond between them. So, melting point of ionic compound is higher than covalent compound .Since, silver iodide is ionic compound and vanillin covalent compound.Therefore, melting point of silver iodide is higher than vanillin.learn about melting point,
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Can yall assist me with this lab? It is really screwing me up... No spam!! the only part that I need is the last page. I will mark brainliest if you get it right. If you spam, or give an intentionally incorrect answer, I will report you to the moderators, and have your account blocked.
Answer:
You can block me I don't care ;-; Ive actually been wanting to be blocked because I don't want my account on brainly anymore but they cant understand that I used my school email for this account and my school email doesnt reseave emails not from the school and I cant change the email to a different one so I cant reset my password so I cant delete my account..
Explanation:
please help me get this done
Answer:
I believe tha answer is travels at the same speed of light
Explanation:
hope this helps
What allows us see the color green?
A
The green wavelength is absorbed.
B
The green wavelength is reflected.
C
All colors but green are reflected back.
D
The green wavelength vibrates the air particles.
Answer:
When (B) the green wavelength is reflected, we are able to see green.
I hope this helped at all.
In an electromagnetic spectrum, complimentary colors are absorbed and reflected , the color which is visible is the reflected color, hence the green wavelength is reflected which enables to see the color green.
What is electromagnetic spectrum?The electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.
Learn more about electromagnetic spectrum,here:
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what is the strongest type of intermolecular forces present between a stearic acid molecule and a water molecule?
The bond and the force present between molecules is called intermolecular force. A hydrogen bond is present between the stearic acid and a water molecule.
What are hydrogen bonds?Hydrogen bonds are the intermolecular force that forms a dipole-dipole interaction with an electronegative atom in the presence of the lone pair of electrons.
In stearic acid, [tex]\rm C_{18}H_{36}O_{2}[/tex], hydrogen bonding exists between the oxygen and the hydrogen atom of the molecule.
Therefore, a hydrogen bond is present between stearic acid and the water molecule.
Learn more about intermolecular force here:
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What is the mass of 2.49 moles of sucrose?
your anwser would be 342 gmol Please mark branliest
Just get out that Periodic Table of the Elements, find the atomic masses for each atom, and add them up!
Carbon = 12
Hydrogen = 1
Oxygen = 16
C=12×12=144
H=1×22=22
O=16×11=176
Sucrose =144+22+176=342gmol
Rationalize the action of open burning
Answer:
open burning adds do our global timer adding carbons ,methane etc. to our atmosphere
also open burning is burning of unwanted material in the open air where smoke and toxins fumes are released into the atmosphere directly
Explanation:
i used the amazing internet
what is neutralisation??
Answer:
Acid + Base -------> Salt + Water
Explanation:
The reaction between an acid and bases is called a neutralization reaction. The result of the reaction is salt and water. For example, when hydrochloric acid(acid) and sodium hydroxide(base) react they form sodium chloride(salt) and water. Also, heat is evolved.
Example:
HCl + NaOH ----------> NaCl + H2O
HCl is hydrochloric acid.
NaOH is sodium hydroxide which is a base.
NaCl is sodium chloride which is a salt.
H2O is water.
2. Some water returns to the air from lakes and the oceans. This process is called: A. Evaporation B. Condensation C. Groundwater
Answer:
A. evaporation
Explanation:
Answer:
This process is called (A) evaporation.
Evaporation is the process is where water turns into a vapor or air.I hope this helped at all.