Answer:
compound
Explanation:
Answer:
compound
Explanation:
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds. When two hydrogen atoms combine with one oxygen atom, it becomes the compound water
explain what happens during the chemical reaction
CaCO3 -> CaO + CO2
check out this article i found it very helpful,
I couldn't find the answer to your question.
what element is found on the left side of the periodic table
Answer:
Mostly Metals, But hydrogen is the only one that isn't.
An ionic bond is made from a ___ and a ___.
There is an equal number of protons and __________ in a neutral atom.
A. electrons
B. neutrons
C. protons
D. elements.
the answer is electrons
Which statement best describes how people within a country may be different? O People know that each region has the same traditions and culture. O People from different regions have different cultures, values and languages. O People believe that people from each region are equal to one another. O People think that mountainous regions are more important than others.
Answer:
its B People from different regions have different cultures, values and languages.
Explanation:
i just took the assignment
Explain the horizontal periodic trend
Answer:
Trends on the Periodic Table have a vertical component and a horizontal component. Vertical trend: as more “shells” are added to the electron cloud, it expands. Horizontal trend: if atoms have the same number of “shells”, atoms with more protons will draw the electron cloud in tighter.
Explanation:
What types of radiation cause the parent isotope to change into a different element?
Answer:
Beta decay is most common in elements with a high neutron to proton ratio. Gamma decay follows the form: In gamma emission, neither the atomic number or the mass number is changed. A high energy gamma ray is given off when the parent isotope falls into a lower energy state.
Explanation:
pls mark me as brainliest
what is a metal and a non metal
Answer:
I assume you mean as in elements
A metal "A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically malleable or ductile." (wiki)
a non-metal "In chemistry, a nonmetal is a chemical element that mostly lacks the characteristics of a metal. Physically, a nonmetal tends to have a relatively low melting point, boiling point, and density. A nonmetal is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity." (wiki)
Explanation:
Answer:
On the periodic table, the metals are usually on the left and middle side and nonmetals on the right side. nonmetals tend to be either a liquid or gas at room temperature and metals are usually solids at room temperature.
Explanation:
PLEASE ANSWER FAST DUE IN 2 MINUTES
The gas released by animal into the environment is ______
Answer:
Carbon dioxide gas
Explanation:
When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere.
how many total electrons can the d orbital hold
Answer:
10 electrons
Explanation:
The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max. In the picture below, the orbitals are represented by the boxes. You can put two electrons in each box.
Answer:
10
Explanation:
you're welcome
A solution is prepared by dissolving 250 g of CH4N2O into 6.0 L of solution. What is the molarity of this solution?
________M
Answer:
Molarity = 0.65 M
Explanation:
Given data:
Mass of CH₄N₂O = 250 g
Volume of solution = 6.0 L
Molarity of solution = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of moles of solute:
Number of moles = mass/molar mass
Number of moles = 250 g/ 64.08 g/mol
Number of moles = 3.9 mol
by putting values,
Molarity = 3.9 mol / 6.0 L
Molarity = 0.65 M
TOPICAL ASSINMENT 2
1. If 25cm' of O.IM H,SO, solution neutralised a solution containing 1.06g anhydrous sodium carbonate in
250cm. of solution, calculate the molarity and the volume of the sodium carbonate solution used. (3mks)
The molarity = 0.04 M
The volume = 6.25 ml
Further explanationGiven
25cm³ of 0.1 M H₂SO₄
1.06g Na₂CO₃ in 250cm³ of solution
Required
the molarity and the volume of Na₂CO₃
Solution
Molarity of Na₂CO₃ :
[tex]\tt \dfrac{1.06/106~mol}{0.25~L}=0.04~M[/tex]
Reaction
H₂SO₄ + Na₂CO₃ ⇒Na₂SO₄ + H₂O + CO₂
mol H₂SO₄ = 25 x 0.1 = 0.25 mlmol= 2.5 x 10⁻⁴ moles of Na₂CO₃
The volume of solution used :
[tex]\tt V=\dfrac{n}{M}=\dfrac{2.5.10^{-4}}{0.04}=6.25.10^{-3}~L=6.25~ml[/tex]
What is the total pressure in units of kPa in a 7.85 L container that contains 4.45 moles of N2 and 2.45 moles of O2 at a temperature of 307 K?
Answer:
Total pressure = 22.15 atm
Explanation:
Given data:
Total pressure = ?
Volume of container = 7.85 L
Number of moles of N₂ = 4.45 mol
Number of moles of O₂ = 2.45 mol
Temperature = 307 K
Solution:
Pressure of N₂:
PV = nRT
P = nRT/V
P = 4.45 mol ×0.0821 atm.L/mol.K ×307K / 7.85L
P = 112.16 atm.L/7.85 L
P = 14.28 atm
Pressure of O₂:
PV = nRT
P = nRT/V
P = 2.45 mol ×0.0821 atm.L/mol.K ×307K / 7.85L
P = 61.75 atm.L/7.85 L
P = 7.87 atm
Total pressure = P(N₂) + P(O₂)
Total pressure = P( 14.28 atm) + P( 7.87 atm)
Total pressure = 22.15 atm
What is the relationship between the circulatory and respiratory systems?
A. They work together to store the waste that blood collects from the body.
B. The circulatory system provides oxygen that the respiratory system uses to fill the lungs
C. The respiratory system provides blood that the circulatory system uses to transport nutrients.
D. They work together to supply oxygen to tissues and rid the body of carbon dioxide
Answer:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart
Explanation:
This should help you out
Aluminum metal reacts with aqueous nickel(II) sulfate to produce aqueous aluminum sulfate and nickel as a precipitate. In this reaction 108 g of aluminum were combined with 464 g of nickel(II) sulfate to produce 274 g of aluminum sulfate.
The question is incomplete, the complete question is;
In this stoichiometry problem, determine the percentage yield:
Excess aluminum metal reacts with aqueous nickel(II) sulfate to produce aqueous aluminum sulfate and nickel as a precipitate. In this reaction 108 g of aluminum were combined with 464 g of nickel(II) sulfate to produce 274 g of aluminum sulfate.
Answer:
80%
Explanation:
The reaction equation is;
2Al(s) + 3NiSO4(aq) --------> Al2(SO4)3 + 3Ni(s)
Since Al is in excess then NiSO4 is the limiting reactant.
Number of moles in 464 g of NiSO4 = mass/ molar mass
Molar mass of NiSO4 = 155 g/mol
Number of moles = 464g/155g/mol = 2.99 moles
Number of moles of Al2(SO4)3 = mass/molar mass
molar mass = 342 g/mol
Number of moles = 274g/342g/mol = 0.8 moles
From the reaction equation;
3 moles of NiSO4 yields 1 mole of Al2(SO4)3
2.99 moles of NiSO4 yields 2.99 * 1/3 = 1 mole of Al2(SO4)3
% yield = actual yield/ theoretical yield * 100/1
actual yield = 0.8 moles of Al2(SO4)3
Theoretical yield = 1 mole of Al2(SO4)3
% yield = 0.8/1 * 100 = 80%
In this exercise we have to use the knowledge of reaction to calculate the required percentage, in this way we find that:
[tex]80\%[/tex]
The reaction equation is;
[tex]2Al(s) + 3NiSO_4(aq) \rightarrow Al_2(SO_4)_3 + 3Ni(s)[/tex]
Since Al is in excess then NiSO4 is the limiting reactant. Now knowing that the data informed is:
Number of moles in 464 g of NiSO4 Molar mass of NiSO4 = 155 g/mol Number of moles = 2.99 moles Number of moles of Al2(SO4)3 Molar mass = 342 g/mol Number of moles = 0.8 moles
From the reaction equation;
[tex]\% yield = actual\ yield/ theoretical\ yield * 100/1\\\% yield = 0.8/1 * 100 = 80%[/tex]
See more about reaction at brainly.com/question/3664113
What happens when the number of electrons and protons inside of an atom are Not equel?
Hello, It's me Moriah Elizabeth!
Answer:
When the number of electrons does not equal the number of protons, the atom is ionized.
HELP! ASAP!!! WILL MARK BRAINLIEST!!
Which of the following compounds in the main group is an alkali metal? Question 7 options: Beryllium (Be) Rubidium (Rb) Hydrogen (H) Strontium (Sr)
Answer:
Rb
Alkali Metals are Group 1 so
Rb it isnt Hydrogen because it is a gas
Explanation:
For the reaction C+2H 2 —->CH 4 calculate the percent yield if 98 g of methane is produced when 100. g of carbon reacts with an excess of hydrogen?
The percent yield : 73.5%
Further explanationGiven
Reaction
C+2H₂⇒CH₄
Required
The percent yield
Solution
mol of Carbon(as a limiting reactant) :
[tex]\tt \dfrac{100}{12}=8.3[/tex]
mol CH₄ based on C, and from equation mol ratio C : CH₄, so mol CH₄ = 8.3
Mass of Methane(theoretical yield) :
[tex]\tt mass=mol\times MW\\\\mass=8.3\times 16=133.3~g[/tex]
[tex]\tt \%~yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{98}{133.3}\times 100\%=73.5\%[/tex]
Replication, Transcription, and Translation Chart
Please answer
DNA Replication:
1。Template Strand: Start with this nucleotide chain.
TACCCTTGAATAAAAAATCTCTGTTTGGTCGGTATTGTTGAAATC
2。Complementary DNA Strand: Write directly below template strand.
Transcription:
3。mRNA Strand: Write the complementary mRNA strand from the DNA template strand (#1).
Translation:
4。Anticodon: Write the anticodon sequence to match the mRNA strand (#3).
5。Protein Synthesis: Write the mRNA sequence that is complementary to the anticodons. Meaning the opposite code of the anticodons (#4).
6。Amino Acid Sequence: Create the amino acid sequence from protein synthesis using 3 letter abbreviation for amino acids (#5).
I can help with 1, 2, 3, and 4... 5 and 6, I don't understand.
Template sequence : TACCCTTGAATAAAAAATCTCTGTTTGGTCGGTATTGTTGAAATC
Complement sequence : ATGGGAACTTATTTTTTAGTGTCAAACCAGCCATAACAACTTTAG
mRNA sequence : AUGGGAACUUAUUUUUUAGAGACAAACCAGCCAUAACAACUUUAG
Anticodon sequence : AUG-GGA-ACU-UAU-UUU-UUA-GAG-ACA-AAC-CAG-CCA-UAA-CAA-CUU-UAG
(not 6) Protein synthesis : START-Gly-Thr-Tyr-Phe-Leu-Glu-Thr-Asn-Gin-Pro-Stop
5(a) Consider the following schemes
Petroleum
>petroleum fractions
Higher petroleum fractions 1 , petrol + x
X + Y MI >CH,CICH,CI
nX"V (CH2 - CH2 - CH2-CH2)n
(i) State the type of reaction involved in I to IV
Answer:
is number 1
Explanation:
cause i know
PLEASE HELP THIS IS OVER DUE AND I NEED TO GET IT DONE IM REALLY BAD AT CHEMISTRY
In which state of matter (Solid, liquid, or a gas) do atoms/particles move the fastest?
Answer:
GasExplanation:
I hope it helps ❤❤❤.......
Answer:
Gas
Explanation:
Solid= Particles are really tight (Example: Ice Cube) Has a fixed shape
Liquid= Particles flow freely but is of constant volume.(Liquid fills it's container. Example: Water) No fixed shape
Gas= Particles move freely can fill its container has NO FIXED SHAPE or NO FIXED VOLUME(Example: Oxygen) Particels move FASTEST
Magnesium has 12 electrons. How many electrons will be orbiting in the outermost shell, farthest away from the nucleus?
1) 2
2) 10
3) 8
4) 4
5) 3
6) 7
Answer:
Magnesium has an outer energy level of n=3 with two electrons in in its energy level. Therefor Magnesium has 2 valance electrons.
Explanation:
what is a substrate
Answer:
a substrate is surface or material on or from an organism lives, grows, or obtains its nourishment.
Explanation:
Hey I hope this helps.....
Question 15 of 25
What is the standard cell notation of a galvanic cell made with aluminum and
magnesium?
A. Al3+(aq) | Al(s) || Mg(s) | Mg2+(aq)
B. Mg2+(aq) | Mg(s) || Al(s) | A13+(aq)
C. Mg(s) | Mg2+(aq) || A13+(aq)| Al(s)
D. Al(s) | Al3+(aq) || Mg2+ (aq) | Mg(s)
SUBMIT
The standard cell notation of a galvanic cell made with aluminum and magnesium is option A. Al3+(aq) | Al(s) || Mg(s) | Mg2(aq).
The right side is the cathode and the left side is the anode. The cell is represented by the convention that the metal is written first, then the metal ions present in the electrolyte. And these two should be separated by a vertical line. Zinc becomes the cathode of the galvanic cell.
Galvanic cells consist of two different metal electrodes connected by a conductive solution electrolyte, which are also connected externally to complete an electrical circuit. Cell notation or cell representation in chemistry is a simple way of representing reactions in an electrochemical cell. The silver half-cell is reduced due to its high standard reduction potential. Tin half-cells are oxidized.
Learn more about Galvanic cells here:-https://brainly.com/question/28182115
#SPJ1
Answer: C
Explaination:
Calculate the mass of 0.2 moles of zinc nitrate.
Answer:
mass = 37.8 g
Explanation:
mass = mol × molar mass
mol = 0.2
molar mass = Zn(NO3)2
Zn = 65
N = 14
O = 16
substitute the values into Zn(NO3)2
Zn(NO3)2
= 65+2[ 14+3(16) ]
= 65 + 2(62)
= 65 + 124
= 189 g/mol
mass
= mol × molar mass
= 0.2 mol × 189 g/mol
= 37.8 g
explain how to find the mass of water. show your calculations as well
Answer:
You can find the mass of water by multiplying the density of water by its volume.
mass = Density x volume
Explanation:
It is very easy to find the mass of water once you know the formula of density. "Density" refers to mass per unit volume.
Density (ρ) = [tex]\frac{mass}{volume}[/tex]
Therefore, mass = ρ x volume
The density of water is 1 kg/L.
For example, if the volume of water is 500 ml, then you can get its mass by multiplying 500 ml by 1 kg/L.
Let's convert 500 ml to Liter first.
500 ml x [tex]\frac{1 L}{1,000 ml}[/tex] = 0.5 L
Now, let's compute.
mass = ρ x volume
mass = 1 kg/L x 0.5L
mass = 0.5 kg
The mass of a 500-ml water is 0.5 kg.
Why do scientists often use bacteria to produce medicines?
Answer:
Bbbbb eg2020
Explanation:
Bbbbb
A family consumes 2.5 gallons of milk per week. How many liters of milk do they need to buy for one month? (Assume there are exactly 4 weeks in 1 month) SHOW WORK
Answer:
37.85 liters
Explanation:
they need 10 gallons for a month (2.5*4)
after that, convert gallons to liters (conversion to liters= 3.785)
10*3.7585= 37.85
What are the predominant intermolecular forces in: Kr, CBr4, NaF, CH3OH, and ruby? Then rank by increasing boiling point.
Answer:
Kr- dispersion forces
CBr4- dispersion forces
CH3OH - dispersion forces, dipole interaction, hydrogen bonding
NaF- ionic
Kr-<CBr4<CH3OH<NaF
Explanation:
The magnitude of intermolecular forces influences the boiling points of substances. The stronger the intermolecular forces the higher the boiling point.
The strongest intermolecular forces here is the Ionic bond hence it accounts for the highest boiling point followed by CH3OH having hydrogen bonding.
Though Krypton and CBr4 both have dipole interaction, the higher relative molecular mass of CBr4 makes it to have a higher boiling point than Kr
4. What do nutrigenomics and pharmacogenomics have in common?
Answer:
Individual genetic variation
Explanation:
is the common factor on which both pharmacogenomics and nutrigenomics are based.