Answer:
1. The oxidation number of Ca is 2, F is -1 in CaF₂
2. The oxidation number of H is 2, S is 6, O is -8 in H₂SO₄
3. The oxidation number of Ca is 2, S is 6, O is -8 in CaSO₄
4. The oxidation number of H is 1, F is -1 in HF
Explanation:
To get the oxidation number, we need to take the oxidation number of the whole compound 0. Then we need to know the oxidation number of the other elements and we need to take 'x' as the oxidation number of the unknown element.
Example:
In case of CaSO₄,
We can write an equation as-
CaSO₄ = 0
If we need to know the oxidation number of S
We can write the equation like this-
→2+ x+ (-2*4) = 0 (as we know the oxidation number of Ca is 2 as it has two electrons in its last shell which it gives to other elements to form bonds and the oxidation number of O is -2 as it takes 2 electrons to complete its outer shell)
→2+ x+ (-8) = 0
→2+ x- 8 = 0
→x- 6 = 0
→x = 6; which is the oxidation number of S
The following are the oxidation numbers:
In CaF2, the oxidation number of Ca is +2, and that of F is -1.
In H2SO4, the oxidation number of H is +1, that of S is +6, and that of O is -2.
In CaSO4, the oxidation number of Ca is +2, that of S is +6, and that of O is -2.
In HF, the oxidation number of H is +1, and that of F is -1.
What is oxidation number?Oxidation numbers are a way of representing the degree of oxidation (loss of electrons) or reduction (gain of electrons) of an element in a chemical compound. The oxidation number of an element is calculated based on the number of valence electrons (electrons in the outermost energy level of an atom) and the rules for assigning oxidation numbers.
In general, the oxidation number of an element is equal to the charge it would have if all the bonds in the compound were ionic (made up of positive and negative ions). This allows chemists to predict the behavior of elements in a compound and to balance chemical equations.
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a) dry apricots are left transferred to sugar solution?
explain why there is more carbon dioxide in expired than inspired air
Answer:
Exhaled air has more carbon dioxide than inhaled Air because during respiration the food breaks down with the help of oxygen to produce Carbon dioxide and water. ... Therefore Exhaled air contains more Carbon dioxide than inhaled Air.
Along the inferior surface of the liver are several structures that collectively resemble the letter H. The ______ and the round ligament of the liver form the vertical superior parts of the H; the inferior vena cava and the ligamentum ______ form the vertical inferior parts.
Along the inferior surface of the liver are several structures that collectively resemble the letter H. The gallbladder and the round ligament of the liver form the vertical superior parts of the H; the inferior vena cava and the ligamentum venosum form the vertical inferior parts.
The gallbladder is a pear-shaped organ localized on the right side of the body, directly under the liver. This organ functions to store a digestive fluid called bile until it's needed for digestion.The round ligament of the liver (also called ligamentum teres hepatis) is a remnant of the fetal umbilical vein. This ligament is part of the coronary ligament of the liver.The ligamentum venosum (also called the hepatogastric ligament) is a deep cleft on the posterior surface of the liver. It is a fetal remnant ligament attached to the left branch of the portal vein within the porta hepatis.Learn more in:
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All of the following are protozoans except Mushrooms Amoebas Paramecium Euglena
Answer:
because they belong in the fungi kingdom
Explanation:
Answer:
Mushrooms
Explanation:
Mushrooms belong to the fungi kingdom
Cómo explicarías tu que el soporte vegetal es más importante que los animales en un ecosistema?
Answer:
Las plantas son productores primarios, mientras que los animales son consumidores
Explanation:
La cadena alimenticia está conformada por niveles tróficos donde la energía fluye desde los niveles basales representados por la base de la pirámide, hasta los niveles superiores (pico de la pirámide). De este modo, los organismos representan diferentes eslabones de acuerdo a su posición en la cadena alimenticia. En el primer nivel se encuentran los productores primarios como lo son, por ejemplo, las plantas y algas de ambientes terrestres y acuáticos, respectivamente, siguiendo por los consumidores primarios (por ejemplo, especies hervívoras), continuando sucesivamente por los consumidores secundarios, terciarios y cuaternarios (especies carnívoras), los cuales se encuentran en posiciones cada vez más altas de la pirámide. No obstante, es importante indicar que existen ocasiones donde los consumidores superiores (ya sea secundarios, terciarios y cuaternarios) se alimentan de especies situadas por debajo de diferentes niveles no consecutivos e incluso también de especies pertenecientes al mismo nivel trófico, con lo cual encajando en más de una categoría y dificultando su clasificación en la cadena.
Proton pumps embedded in the cell membrane use ATP to move hydrogen ions across the membrane. Which of the following best describes a function of the proton pump? A. It decreases the pH inside the cell to prevent toxicity. B. It generates a voltage across the membrane as a way to store energy. C. It helps maintain homeostasis by absorbing electrical charges. D. It increases the fluidity of the cell membrane as energy is used.
Answer for anyone who may still need it: B. It generates a voltage across the membrane as a way to store energy.
The study of structure or how organisms are organized on the cellular, tissue, organ, system, or organism levels is called what
Answer:
Anatomy.
Because Anatomy is the study of internal body organs
"Wow! This rose bush is doing so much better on this side of the house than
on the other side. I wonder why that is?"
East or South side is best
Explanation:
Roses do best in full sun and morning sun is the best place. so always plant roses the along an east wall or south side of your home
What is the monomer that’s makes up polysaccharides
Answer:
glucose
Explanation:
Polysaccharides are long chains of monosaccharides linked by glycosidic bonds. Three important polysaccharides, starch, glycogen, and cellulose, are composed of glucose. Starch and glycogen serve as short-term energy stores in plants and animals, respectively. The glucose monomers are linked by α glycosidic bonds.
What is the potential disadvanatges of external digestion
Answer:
Environmental hazards such as predators reduce the change if surviving into adulthood, Large amounts of gametes go unfertilised and wasted, Not guaranteed that sperm will come in contact with eggs, Greater chance of desiccation of gametes/zygotes.
Explanation:
is a carbon atom alive?
Answer:
No
Explanation:
Like I said before in a question similar to this one no it is not alive. Although, Carbon is found in all living things and they move constantly through living organisms, the oceans, the atmosphere, and the Earth’s crust in what is known as the carbon cycle it does not consist of all 7 characteristics that are needed to be considered an organism. For example reproduction and response to stimulus...... it does neither
Which of the following statements is true? Bacteria and protozoa are examples of unicellular organisms. Individual cells do not need to maintain homeostasis. Most multicellular organisms reproduce through mitosis. Two identical daughter cells are created from sexual reproduction.
Answer:
Bacteria and protozoa are examples of unicellular organisms.
Explanation:
Bacteria are prokaryotic organisms in which the genetic material is not enclosed in a membrane. Bacteria are one of the oldest groups on Earth. Bacteria may inhabit diverse environments such as the deep ocean, soils, acidic hot surfaces, radioactive materials, etc. On the other hand, protozoa (also known as protozoan) are unicellular, heterotrophic, eukaryotic microorganisms, whose genetic material is enclosed within a nucleus that has a membrane. This group was originally considered to be animals because they have animal-like features including, for example, motility and predation.
The statement "Bacteria and protozoa are examples of unicellular organisms" is true. Bacteria and protozoa are both single-celled organisms.
What are the false statements?The statement "Individual cells do not need to maintain homeostasis" is false. Homeostasis is the ability of cells to regulate their internal environment to maintain a stable condition necessary for proper functioning.
The statement "Most multicellular organisms reproduce through mitosis" is false. Most multicellular organisms reproduce through a process called meiosis, which involves the formation of specialized cells called gametes.
The statement "Two identical daughter cells are created from sexual reproduction" is false. Sexual reproduction involves the fusion of two gametes, resulting in the formation of a genetically diverse offspring.
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What are the uses of the whorls of the flower
Answer:
The outermost whorl of the flower has green, leafy structures known as sepals. The sepals, collectively called the calyx, help to protect the unopened bud. The second whorl is comprised of petals—usually, brightly colored—collectively called the corolla.
what in your home would be considered something you could study in biology?
Answer:
Food and plants!
when lumps of soil for clay, loam and sand are rolled in hands, the ease with which they crumble is always in the reducing order as.
A.clay,sand,loam
B.sand,clay,loam
C.sand,loam,clay
D.clay,loam,sand
Answer:
The correct answer is:
sand, loam, clay (C.)
Explanation:
Arranging the ease of crumbling in reducing other means that the different types of soils are arranged in the order where the soil type most likely to crumble when rolled is written first, and the soil type least likely to crumble is written last. The soil most likely to crumble (scatter) when rolled is the sandy soil, and the least likely to crumble is the clay soil.
How do the leaves help trees survive in their respective biomes? A. The temperate leaves are broad and flat to maximize sunlight absorption, while the taiga leaves are long and thin to minimize sunlight absorption. B. The temperate leaves are thin to minimize absorption of sunlight, while the taiga leaves are specialized to store water during the dry season. C. The temperate leaves shed water during the wet season, while the taiga leaves can enter long periods of dormancy during colder weather. D. The temperate leaves grow in the spring and shed in the cold, while the taiga leaves are dark and wax-coated to prevent the tree from freezing.
Answer:
The correct answer is option D.
Explanation:
The temperate leaves grow in temperate forests found in America, Europe, and Asia. This biome comprise of trees have evergreen conifers with needle like leaves. Such leaves can endure wide change of temperature and light. Some vegetation of temperate biome are conifers such as Pine, Hemlock and other. The trees shed their leaves with the beginning of fall and new leaves are delivered in late-winter to protect from the cold.
On other hand, Taiga forest is the biggest biome on the planet. This biome contain conifers with long, slender waxy needles like leaves. These waxy leaves provide security against freezing temperature and from dying drying out. In contrast to temperate they don't sheds their leaves in winter and keep their needles throughout the entire year.
Thus, the correct answer is option D.
Answer:
D. The temperate leaves grow in the spring and shed in the cold, while the taiga leaves are dark and wax-coated to prevent the tree from freezing
Explanation:
Got it right on Edmentum
Escherichia coli infections Multiple Choice can cause an inflammatory disease similar to Shigella dysentery. include urinary tract infections from normal flora strains. All of these choices are correct. are often transmitted by fecal contaminated water and food. involve enterotoxin in traveler's diarrhea.
Answer:
E. All of the choices are correct.
Explanation:
Escherichia coli infections
A. are often transmitted by fecal contaminated water and food.
B. include urinary tract infections from normal flora strains.
C. involve enterotoxin in traveler's diarrhea.
D. can cause an inflammatory disease similar to Shigella dysentery.
E. All of the choices are correct.
what are top consumer
Answer:
it is a food chain.
I can't write more it's not allowed
What is the basic unit of structure and function of all living organisms?
Answer:
Cells is the basic units of structure and function of all living things.
Hope it helps you.Which of these does not affect an individual’s metabolic rate?
A-their height
B-The genes they inherited
C-The muscle to fat ratio
D-The amount of exercise They do
A skin cell of a red fox has 34 chromosomes. You look at the cell under a microscope and see that it has 34 chromosomes and one nucleus. Several hours later, you look at the same cell a second time and see that it has double the amount of DNA and one nucleus. A little while later, you see the cell for a third time and notice that it has 68 chromosomes and two nuclei. What stage of the cell cycle was this cell in when you viewed it at each time point
Answer:
See the answer below
Explanation:
At the first look, the cell was in G1 phase of the cell cycle. At the second look, the cell was in the G2 phase of the cell cycle, and at the third look, the cell was in Telophase.
At the G1 phase of the cell cycle, the cell mainly experiences growth and development. Nothing much happens except that the cell increases in volume.
At the G2 phase of the cell cycle, synthesis of DNA has taken place during the S phase and the amount of DNA present in a cell is doubled at this stage.
At the telophase stage of the cell division in the cell cycle, chromosomes have completed their migration to the poles and each pole appears like a nucleus with their individual chromosomes under the microscope. The cytoplasm is yet to divide at this stage, hence, everything still appears as a single cell.
what is the utility of tissues in multi cellular organisms
Answer:
A tissue is classified as a cluster of cells that work together to perform a particular task and are structurally similar. In multicellular species, the use of tissues provides structural and mechanical strength and enables division of labour.
Your patient has a rash, a fever, and a very high white blood cell count. Blood specimens are taken, put into sterile culture bottles, and sent down to the microbiology lab for incubation and analysis. Select the statement that best reflects why microbial analysis of blood is an important step in this patient diagnosis: SP Select one or more:
a. A lack of microbes in the blood means that the patient's health is critical
b. minimal microbial growth in the blood sample is normal and should be ignored
c. Blood culture analysis would not provide any useful information to the diagnostic team
d. Blood specimen are often obtain through poor aseptic technique by the healthcare worker
e. microbial growth in the blood sample may possibly indicate sepsis in the patient
Answer:
e. microbial growth in the blood sample may possibly indicate sepsis in the patient.
Genetic engineering involves various stages.
1 human DNA is inserted into bacterial plasmid DNA
2 recombinant plasmid inserted into bacteria
3 restriction enzyme cuts bacterial plasmid DNA
4 restriction enzyme cuts human DNA
What is the correct sequence for genetic engineering?
Answer:
4, 3, 1, 2
Explanation:
FIRST: cDNA is synthesized to be used as a gene of interest: processed (spliced) mRNA (no introns) is reverse transcribed to cDNA using reverse transcriptase, an enzyme from retroviruses
SECOND: Restriction enzyme used to cut GOI
THIRD: Same Restriction enzyme used to cut plasmid (sticky ends are created)
FOURTH: GOI connects/hybridizes with plasmid due to base-pairing
FIFTH: DNA ligase connects the recombinant DNA strands
how do each of the following factors affect the productivity in this process of photosynthesis ? 1)Temperature 2) Water 3) carbondioxide
Answer:
without the right amount of temperature and water photosynthesis won't take place and without the presence of carbon dioxide...there is nothing like photosynthesis
Explanation:
1) Temperature- Above 28°C of temperature photosynthesis will not take place faster as necessary. At this temperature, the enzymes responsible for photosynthesis will not work efficient as needed . 2)Water and 3)Carbon Dioxide-Water and carbon dioxide are the reactants in Photosynthesis which means they are taken in to produce energy. Six molecules of water and six molecules of carbon dioxide are needed to break apart glucose and produce energy.
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name 3 physiological processes of cell membrane?{3mks} plz help me guys
Answer:
the cell membrane is an extremely pliable structure composed primarily of back -to- back phospholipids (a "bilayer")
While performing an experiment, it is important to:
a. change the control setup
b. test many different variables at the same time
c. reach a conclusion
d. record observations and measurements
Answer:
D
Explanation:
While performing an experiment, it is important to record observations and measurements, as in Option d. Option d is correct regarding the facts of the experiments, while the others are wrong.
What is an experiment?The experiment is carried out to observe the hypothesis, and in this process, a control set-up is taken whose value or result is already known, and the variables are taken and compared with the control. The controls set should never change in the experiment because the variables are tested with reference to them, and the measurements and observations of the experiment should be taken into consideration to prove the hypothesis. All the variables should not be tested at once because if this is done, it would introduce error into the experiment, and not all the experiments are done to get the conclusion.
Hence, while performing an experiment, it is important to record observations and measurements, as in Option d.
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brain is considered as the centre of all senses, why ?
Answer:
the brain transfers and receives all signals from different parts of the body and controls what we do. it stimulates all our moves.
if something we touch is hot the brain will receive signals from the sensory cells in the skin, it'll tell us to move away, we'll move our hand away as a reaction.
Explanation:
Which diagnostics professional operates a machine that produces visible waves on a computer monitor to represent
electrical activity in the heart?
laboratory analyzer
MRI technologist
phlebotomist
electrocardiograph technician
Answer:
An ECG technician operates a machine that produces visible waves of electrical heart activity.
Explanation:
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Answer:
D. electrocardiograph technician
Explanation:
When an action potential from a motor neuron arrives at the neuromuscular junction (NMJ), a series of events occurs that leads to muscle contraction. What events will occur last?
Answer:
conformational change in troponin
Explanation:
The troponin complex plays an essential role in the thin filament regulation of striated muscle contraction.