Location the element zinc (Zn) on the periodic table:
Group number : 12 Period number : 4 Block : d block Element : Transition elements.Part 2:Protons in an atom of Zn: 30
Part 3:Electrons in a Zn atom: 30
Part 4 :Neutron in an atom of Zn: 35
Answer: Number of protons and electrons in Zinc are 30 and number of neutrons in zinc are 35.
Explanation:
Zinc is the 30th element of the periodic table having mass number of 65.
Atomic number is defined as the number of protons or number of electrons present in an element. It is represented as Z.Atomic number = Number of protons = Number of electrons
For Zinc:
Z = 30
So, Number of protons = Number of electrons = 30
Mass number is defined as the sum of number of protons and number of neutrons. It is represented as A.Mass number = Number of neutrons + Number of protons
A = 65
So, Number of neutrons = 65 - 30 = 35
Hence, number of protons and electrons in Zinc are 30 and number of neutrons in zinc are 35.
is water wet? (this is a homework question)
No. water itself cannot be wet it makes things wet but because water molecules are already water it cannot make itself wet so in other words water makes things wet but its not exactly wet itself.
water is not wet because it is a liquid that wet things once you come in contact with water you become wet until then water is liquid and you stay dry
why does magnesium have a larger atomic radius that chlorine
Magnesium AR: 150 pm
Chlorine AR: 100 pm
which of these contains genetic material but is not classified as living
A. bacteria
B. virus
C. lizzard
D. protozoa
A virus is considered living in some ways, but in the end, they cannot be considered a living organism because they cannot reproduce by themselves.
B is correct, a virus is not classified as living
The entity that contains genetic material but are not classified as living are viruses. Thus, option B is correct.
What is a genetic material?Genetic material is described as the hereditary substance. It is carried in the cell, and contains the specified information to the organism. The material can be of two types, Deoxyribose nucleic acid (DNA), and Ribonucleic acid (RNA).
The characteristics that defines the entity to be living is the presence of the nucleic acid and the ability to reproduce. Viruses are the organisms that can reproduce inside the host cell only.
Thus, with the inability to reproduce outside the host cell, viruses are considered as non-living in spite they contain genetic material. Hence, option B is correct.
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Which chemical equation represents a precipitation reaction? A. Mg(ClO3)2(aq) + 2HCl(aq) → MgCl2(aq) + 2HClO3(aq) B. AlBr3(aq) + 3LiI(aq) → AlI3(aq) + 3LiBr(aq) C. NH4NO3(aq) + HBr(aq) → NH4Br(aq) + HNO3(aq) D. Li2CO3(aq) + FeCl2(aq) → 2LiCl(aq) + FeCO3
Answer is D.
Among the given options, the products of equation A, B and C are aqueous solutions. Those are indicated by using (aq).
The balanced equation for the reaction between Li₂CO₃(aq) and FeCl₂(aq) is Li₂CO₃(aq) + FeCl₂(aq) → 2LiCl(aq) + FeCO₃(s)
LiCl is a salt while FeCO₃ is a Grey/green color precipitate. Hence, option D represents a precipitation reaction.
Answer:
plato / edmentum
Explanation:
(easy)+(25 points)
What is the net force acting on the object (represented by the solid circle) in this diagram?
146 is the net force I love ur pic btw.
The answer is 200N to the left
PLEASE SHOW WORK I CANT FIGURE THESE OUT
1. 5,400 inches to miles: 0.085227 miles.
2. 16 weeks to seconds: 8,966,400 seconds.
3. 54 yards to mm: 49,381.76 mm.
4. 36 cm/sec to mph: 0.080502 mph.
using the dimensional analysis-
1. 5,400 inches to miles:
5,400 inches * (1 foot / 12 inches) * (1 mile / 5,280 feet) = 0.085227 miles.
2. 16 weeks to seconds:
16 weeks * 7 days/week * 24 hours/day * 60 minutes/hour * 60 seconds/minute = 8,966,400 seconds.
3. 54 yards to mm:
54 yards * 3 feet/yard * 30.48 cm/foot * 10 mm/cm = 49,381.76 mm.
4. 36 cm/sec to mph:
36 cm/sec * (1 foot / 30.48 cm) * (1 mile / 5,280 feet) * (3600 sec / 1 hour) = 0.080502 mph.
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The complete question is -Dimensional Analysis Worksheet Set up and solve the following using dimensional analysis.
1 mile = 5,280 ft 1 inch = 2.54 cm
3 feet = 1 yard 454 g = 1lb
946 ml 1 qt 4 qt=1 gal
1) 5,400 inches to miles
2) 16 weeks to seconds
3) 54 yards to mm
4) 36 cm/sec to mph
Dan wrote the following phrase to describe the movement of particles in a state of matter.
"Small pea seeds move around each other but do not bounce off."
Which state of matter did Dan most likely describe?
Gas
Plasma
Liquid
Solid
Final answer:
Dan most likely described a liquid state of matter because the particles are in constant contact, can move around each other, and don't bounce off, unlike in a gas. This movement is due to the relatively strong intermolecular forces that are characteristic of liquids.
Explanation:
Based on Dan's description of particles that 'move around each other but do not bounce off,' he is likely describing the liquid state of matter. In a liquid, the particles are close enough to experience strong intermolecular interactions, which usually keep the particles contained within the liquid boundary. However, unlike solids, the particles within a liquid are not fixed in position and have the ability to move around and flow, thus allowing them to take the shape of their container while maintaining a definite volume. Liquids are characterized by the ability of particles to slide past one another, which differentiates them from the fixed positions of particles in a solid and the free, independent movement of particles in a gas.
How does the density of air affect its movement in a convection cell?
a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. These density differences result in rising and/or falling currents, which are the key characteristics of a convection cell. When a volume of fluid is heated, it expands and becomes less dense and thus more buoyant than the surrounding fluid. The colder, denser part of the fluid descends to settle below the warmer, less-dense fluid, and this causes the warmer fluid to rise. Such movement is called convection, and the moving body of liquid is referred to as a convection cell.
Final answer:
Air density impacts movement in convection cells, with warm, less dense air rising and cool, denser air sinking, creating a cycle that drives convection currents and influences weather patterns.
Explanation:
The density of air affects its movement in a convection cell because warm air that is less dense rises, while cooler, denser air sinks. This movement of air due to differences in density is what drives convection currents. As a fluid, such as air, is heated, it expands, becoming less dense than the surrounding fluid. This decrease in density results in buoyancy, causing the air to rise. At higher elevations or as the air mass expands and comes into contact with cooler environments, it loses heat, becomes denser and hence sinks back down, creating a convection cell, as seen in phenomena such as Hadley cells and local weather patterns like thunderstorms. In essence, the difference in density affected by the temperature is responsible for the movement of air within these cells, transferring energy from one place to another.
PLEASE HELP WILL MARK BRAINIEST
Which is a property that most metals have in common?
Select one:
a. brittle
b. shiny
c. poor conductor of electricity
d. tend to gain 1 or more electrons in a chemical reaction
Tellurium is a silvery-white, brittle element. Its electrical conductivity varies, but increases slightly with exposure to sunlight.
This element belongs to which region of the periodic table of the elements?
Select one:
a. metalloids
b. noble gases
c. metals
d. nonmetals
Most of the elements of which region of the periodic table are located directly to the right of the metalloids?
Select one:
a. metals
b. nonmetals
c. noble gases
Which is a property that most solid nonmetals have in common?
Select one:
a. shiny
b. brittle
c. tend to lose 1 or more electrons in a chemical reaction
d. good conductors of electricity
Which is a property that most nonmetals have in common?
Select one:
a. poor conductors of electricity
b. tend to lose 1 or more electrons in a chemical reaction
c. malleable
d. shiny
Metals have the property of being shiny. Tellurium is a metal and belongs to the metallic region of the periodic table. Solid nonmetals are brittle, and most nonmetals are poor conductors of electricity.
The property that most metals have in common is that they are shiny. This is due to the way metals reflect light. Metals have free electrons that are able to move around, creating a smooth and shiny surface.
Tellurium is a silvery-white, brittle element that belongs to the metals region of the periodic table.
Most of the elements located directly to the right of the metalloids in the periodic table are nonmetals.
The property that most solid nonmetals have in common is that they are brittle. Nonmetals tend to be brittle because they lack the metallic bonding that gives metals their strength and ductility.
A property that most nonmetals have in common is that they are poor conductors of electricity. Nonmetals do not have free electrons like metals, so they are not able to conduct electricity as well.
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Which of the following observations would indicate that a material is a pure substance
The observation that would indicate that a material is a pure substance is:
C. It cannot be physically broken down into different types of atoms.
A pure substance consists of only one type of atom or molecule, meaning it cannot be broken down into simpler substances by physical means. Option C describes this characteristic, indicating that the material cannot be physically separated into different types of atoms, thus suggesting it is a pure substance. Options A, B, and D describe properties that may or may not be indicative of a pure substance, but they do not directly address the fundamental composition of the material as being made up of only one type of atom or molecule.
The probable question may be:
Which of the following observations would indicate that a material is a pure substance?
A. It does not dissolve in water.
B. It changes color after heating.
C. It cannot be physically broken down into different types of atoms.
D. It can be physically broken down into different types of molecules.
What is nuclear energy? energy from solar panels energy locked in the nucleus of an atom energy of moving electrons energy that travels in waves
Answer: Energy locked in the nucleus of an atom
Explanation:
Nuclear energy is an energy which binds the constituents of nucleus of an atom together.
There are two types of nuclear reaction from which nuclear energy is produced:
Nuclear fusion: Two small nuclei combine together to form stable nucleus with release in energy.Nuclear fission: One larger unstable nucleus splits into smaller stable nuclei with release in energy.what happens when a pure substance undergoes a chemical change?
When a substance undergoes a chemical change, it results in different physical properties .
it turns into diffrent pyshical properties
Explanation:
while carrying a microscope slide to her lab bench, a student drops it and the slide shatters on the floor.The next step should be to?
A) call 911.
B)place a chemical blanket on top of the broken glass.
C)sweep up the slide and place in the broken glass dispenser.
D)pick up the slide carefully with her hands and place it in the trash can.
E)RUN RUN WE GANA DIE!!!
The next step is C
It isn't A because it is not an emergency
B is for spills I believe
D is wrong because using her hands could be dangerous as she may cut herself.
You have a cup of water and a packet of powdered juice mix. You add some of the juice mix to the cup of water and stir. The powder dissolves completely. You decide to add more juice mix to the cup and stir again. This time chunks of powder are floating on the surface of the water. What can you conclude about the solution?
Use the periodic table to identify each of the following bonds as polar or nonpolar. C—Cl polar nonpolar
Answer: Polar bonds
Carbon (C) has 4 electrons in the valence electrons whereas chlorine has 7. Each carbon and chlorine (Cl) will form a polar covalent bond.
Non polar bonds, develop where two atoms share a pair of electrons with each other. Hence they are known as Non-polar covalent bonds and they have equal electronegativities
In polar bonds, the electrons are shared unequally between the atoms which as a result increases the electronegativity difference which makes it ionic.
The bond is polar bond.
Explanation:Carbon belongs to Group no 4 of periodic table which means It's valency is 4.While chlorine belongs to 7 group of periodic table and have valency of 1.The bond is covalent but it is polar due to electronegativity difference.The Cl is more electronegative than C.So the bond is C—Cl is polar. Carbon is partial positive while chlorine is partial negative.
About 75% of living matter is made up of which two essential chemicals?
calcium,phosphorus,potassium,and sulfer
Answer:
Carbon and oxegyn
Explanation:
Is cake batter a pure substance or mixture
Cake batter is not a pure substance but rather a mixture because it is made of different ingredients like flour, sugar, and eggs that retain their original properties even when mixed together.
Explanation:Cake batter is not a pure substance, but rather a mixture. In Chemistry, a pure substance is an elemental or compound matter with constant composition and properties throughout. This means it's made up of a single type of particle, like gold (element) or water (compound), which can't be separated into other kinds of matter by physical means.
On the other hand, a mixture consists of two or more different substances which are mixed but not combined chemically.
In cake batter, one can find flour, sugar, eggs, and other ingredients that retain their original properties even when mixed together to make the batter. Therefore, we can classify cake batter as a mixture.
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Crystals are characterized by particular patterns that repeat in how many dimensions? A. three dimensions
B. one dimension only
C. two dimensions only
A option is correct answer .
Answer:
A. three dimensions
Explanation:
Crystal lattice have a three dimensional array of repeating units. For example, in the NaCl crystal the repeating units are the Na⁺ and Cl⁻ ions. The Na⁺ and Cl⁻ ions are arranged alternately along the x, y and z axis. The smallest repeating unit of a cell is called unit cell. Crystal lattice have a definite geometry which is because of this rigid array of unit cells.
How does food cooked in a frying pan have anything to do with kinetic energy?
um I believe its heat transfer, or something called ligma.
how does the particle in plasmas compare with the particles in solids
match each alkane names and structures.
First structure is CH₃-CH₃. It is an alkane with two carbon atoms hence it is called ethane.
Second structure is CH₃-CH₂-CH₂-CH₃. It is an alkane with four carbon atoms hence it is called butane.
Third structure is CH₄. It is an alkane with one carbon atom hence it is called methane.
Fourth structure is CH₃-CH₂-CH₃. It is an alkane with three carbon atoms hence it is called propane.
What is the smallest particle of a covalent compound that has the properties of that compound? a molecule an ion an element an atom
A molecule is the smallest particle of a covalent compound that has the properties of that compound.
Explanation:A molecule is the smallest particle of a covalent compound that still has the properties of the compound.
Students working in lab accidentally spilled 17 l of 3.0 m h2so4 solution. they find a large container of acid neutralizer that contains baking soda, nahco3. how many grams of baking soda will be needed to neutralize the sulfuric acid spill? do not include a unit in your answer or it will be counted wrong. use correct significant figures
Answer is: 8568.71 of baking soda.
Balanced chemical reaction: H₂SO₄ + 2NaHCO₃ → Na₂SO₄ + 2CO₂ + 2H₂O.
V(H₂SO₄) = 17 L; volume of the sulfuric acid.
c(H₂SO₄) = 3.0 M, molarity of sulfuric acid.
n(H₂SO₄) = V(H₂SO₄) · c(H₂SO₄).
n(H₂SO₄) = 17 L · 3 mol/L.
n(H₂SO₄) = 51 mol; amount of sulfuric acid.
From balanced chemical reaction: n(H₂SO₄) : n(NaHCO₃) = 1 :2.
n(NaHCO₃) = 2 · 51 mol.
n(NaHCO₃) = 102 mol, amount of baking soda.
m(NaHCO₃) = n(NaHCO₃) · M(NaHCO₃).
m(NaHCO₃) = 102 mol · 84.007 g/mol.
m(NaHCO₃) = 8568.714 g; mass of baking soda.
Please help me with these questions I don't get science
How many different elements are in our bodies?
What are the 6 elements that make up 95% of our bodies?
There are at least 60 elements in our bodies.
Other elements may be present, but in such small quantities that we cannot detect them with current technologies.
The six most abundant elements (by mass) in our bodies are:
Oxygen 65 %
Carbon 18 %
Hydrogen 10 %
Nitrogen 3.2 %
Calcium 1.4 %
Phosphorus 1.1 %
TOTAL = 99 %
what does it mean that gold has a specific heat capacity of 0.135 J/g*C
A specific heat capacity of 0.135 J·°C⁻¹g⁻¹ means that it takes 0.135 J of energy to change the temperature of 1 g of gold by 1 °C.
A 5.00g sample of impure CaCO3 is found to react completely with 100.0 mL of 0.100 M of H2SO4. The equation for the reaction is: CaCO3 (s) + H2SO4 (aq) —> CaSO4 (s) + CO2 (g) + H2O (l). What is the mass percent CaCO3 in the impure sample?
Hey there!:
Given the reaction:
CaCO3(s) + H2SO4(aq) -------> CaSO4(s) + CO2(g) + H2O(l)
volume in liters( H2SO4 ) = 100 mL / 1000 => 0.1 L
Moles of H2SO4:
Molarity * Volume ( L )
0.100 * 0.1 => 0.01 moles of H2O4
1 mole H2SO4 reacted with -------------- 1 mole CaCO3
0.01 moles H2SO4 reacted with ------- 0.01 moles CaCO3
Molar mass CaCO3 = 100.0869 g/mol
Mass of CaCO3 :
Moles of CaCO3 * Molar mass CaCO3
0.01 * 100.0869 => 1.000869 g of CaCO3
Therefore:
% mass = ( Mass of CaCO3 / mass of sample ) * 100
% mass = ( 1.000869 / 5.00 ) * 100
% mass = 0.2001738 * 100
% mass = 20.01%
Hope that helps!
which tool is most suitable for a chemist to measure the mass of a liquid? A. electronic balance B. graduated cylinder C. measuring cup D. meter stick
A is automatically out! since you can't put liquid on an electronic balance.
D.is also out! the most you can do with a meter stick is see how high the water is.
C. IS wrong A measuring cup is closer but not what were looking for.
the answer is B.Graduated Cylinder!
Answer:
It is the graduated cylinder
Explanation:
Consider butter (density= 0.860 g/mL) and sand (density= 2.28 g/mL). If 1.00 mL of butter were mixed with 1.00 mL of sand and mixed as thoroughly as possible what would be the density of the resulting mixture?
The density of the mixture will be 1.57 g/cm³.
Step 1. Calculate the mass of the butter.
[tex]\text{Mass} = \text{1.00 cm}^{3 } \times \frac{\text{0.680 g} }{\text{1 cm}^{3 }} = \text{0.860 g}\\[/tex]
Step 2. Calculate the mass of the sand.
[tex]\text{Mass} = \text{1.00 cm}^{3 } \times \frac{\text{2.28 g} }{\text{1 cm}^{3 }} = \text{2.28 g}\\[/tex]
Step 3. Calculate the density of the mixture.
Total mass = 0.860 g + 2.28 g = 3.14 g.
Total volume = 1 cm³ + 1 cm³ = 2 cm³
[tex]\text{Density} = \frac{\text{mass}}{\text{volume}} = \frac{\text{3.14 g} }{\text{2 cm}^{3 }} = \textbf{1.57 g/cm}{^{3}\\[/tex]
A student is writing his procedure for his science fair project. His teacher reminded him that his experiment should include repetition and should be replicable. Here is the procedure he came up with to determine which brand of diaper is the most absorbent: 1) Purchase 5 different brands of diapers and measure their weight. 2) Have baby sister wear each diaper for 1 hour. 3) Measure the weight of the diaper after 1 hour to see how much liquid it absorbed. 4) Do the experiment again every day for a week. 1) Q: A: Does the student's proposed procedure include repetition? Why or why not? A) Yes, the experiment includes repetition because the student tests 5 different brands of diapers. B) Yes, the experiment includes repetition because the student performs the experiment multiple times. C) No, the experiment does not include repetition because the student only tests the diapers on his sister and not any other babies. D) No, the experiment does not include repetition because the student only has the baby wear the diaper for 1 hour at a time instead of repeating the experiment with different time periods. 2) Is the student's experiment replicable? Why or why not? A) Yes, the student's experiment is replicable since he performed the experiment a total of 7 times. B) Yes, the student's experiment is replicable because any other student could easily follow his procedure. C) No, the student's procedure is not replicable because it is too complicated for someone else to repeat it. He should have limited it to one brand of diaper and only done the experiment for one or two days. D) No, the student's procedure is not replicable because it depends on too many outside factors that can't be controlled, such as how much his sister had to drink or if she even went to the bathroom during the one hour.
Answer.1 B
Explanation:
Student's proposed procedure includes repetitions because in his procedure he had mentioned that he had repeated the same experiment by making his sister wear different diapers from another four brands after each hour. And also repeated the same whole experiment for a week.
Answer.2 D
Explanation:
Procedure is not replicable as there were many independent and dependent factors which cannot be replicated.
Answer:
B
Explanation:
Which of the following best explains the flow of energy in this food web? (3 points)
Mushrooms → Hawk → Squirrel → Grasshopper
Grasshoppers → Snake → Wolf → Hawk
Plants → Squirrel → Snake → Mushrooms
Mushrooms → Snake → Squirrel → Plants
The best explanation for the flow of energy in the food web is:
Plants → Squirrel → Snake → Mushrooms
Third option is correct.
In this food web, energy flows from plants to squirrels, then from squirrels to snakes, and finally from snakes to mushrooms. This flow of energy represents the transfer of energy through different trophic levels.
1. Plants (primary producers) capture energy from the sun through photosynthesis and convert it into food energy (carbohydrates).
2. Squirrels (primary consumers) eat plants to obtain the energy stored in them.
3. Snakes (secondary consumers) eat squirrels, obtaining the energy stored in the squirrel's body.
4. Mushrooms (decomposers) break down the remains of the snake and other dead organisms, releasing nutrients and energy back into the ecosystem.
Each step in the food web represents a transfer of energy from one organism to another, and the direction of energy flow is from the source of energy (plants) through various consumers and eventually to decomposers.
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