Answer:
The atomic mass of silver is 107.86 amu
Explanation:
The atomic mass is calculated by formula
Atomic mass = (Mass of first isotope x Abundance of first isotope) + (Mass of Second isotope x Abundance of second isotope)
In case of silver, the formula will be as
Atomic mass = (Mass of Ag-107 x Abundance Ag-107) + (Mass of Ag-109 x Abundance Ag-109)
Mass of Ag- 107 = 106.9
Mass of Ag- 109 = 108.9
Abundance of Ag-107 = 51.82/100 = 0.5182
Abundance of Ag-109 = 48.18/100 = 0.4818
Putting these values in the formula
Atomic mass of silver = (106.9 x 0.5812) + (108.9 x 0.4818) = 107.86 amu
To calculate the average atomic mass of silver, the masses of its isotopes are multiplied by their relative abundances and summed up, resulting in an atomic mass of 107.841428 amu.
Explanation:The average atomic mass of an element can be calculated by taking the weighted average of the masses of its naturally occurring isotopes, based on their relative abundances. For silver, we have two isotopes: Ag-107 with a mass of 106.9 amu and an abundance of 51.82%, and Ag-109 with a mass of 108.9 amu and an abundance of 48.18%. To find the atomic mass of silver, we perform the following calculation:
Atomic mass = (Percentage abundance of Ag-107 × Mass of Ag-107) + (Percentage abundance of Ag-109 × Mass of Ag-109)
Atomic mass = (0.5182 × 106.9 amu) + (0.4818 × 108.9 amu)
Atomic mass = 55.359866 amu + 52.481562 amu
Atomic mass = 107.841428 amu
Therefore, the average atomic mass of silver is 107.841428 amu.
A location to which you compare other loca
on an obiect
Answer:
What does that even mean
which of these are limiting factors?
a- habitat loss b- all of the above
c- food availability
d- predators
e- disease and parasites
Answer:
all of the above
Explanation:
habitat loss, food availability, predators and disease are all limiting factors in terms of survival
The blood pressure of a soldier is measured while he is resting. The soldier is then exposed to a stressful environment and his blood pressure is measured again
What’s the independent and dependent variable?
Answer:
Independent: stressful enviromentt
Dependent: blood pressure
Answer:
A variable, which is monitored or changed while performing an experiment in order to examine the influences on the dependent variable is considered as the independent variable. On the other hand, the variable, which is being determined and examined while performing an experiment is known as a dependent variable.
The dependent variable bank upon the independent variable. As the researcher modifies the independent variable, the influence on the dependent variable is witnessed and noted. In the given case, a soldier is exposed to a stressful environment, which makes a change in his blood pressure.
It is noted that with the change in the environmental condition, a change is noticed in the blood pressure of the soldier. Thus, in the given case, the stressful environment is an independent variable, and the change in blood pressure is a dependent variable.
whiat is not classified as an organism.
A tree
B lizard
C apple
D bacteria
A. AppleAnswer:
Explanation:
Answer:
the answer is apple
Explanation:
i just took the test and got a 100 precent on it trust me
What is the role of a scientist?
_______________________
(Apex) Answer Choices:
A. To keep scientific secrets
B. To report accurate results
C. To tell people how they must live
D. To dictate government policies
Answer:
B.
Explanation:
The purpose of being a scientists is to share your discoveries with others. Discoveries which must be accurate.
To report accurate results is the role of a scientist. Thus, the correct option is B.
What is the role of scientist in society?Scientists play an important role not only in avoiding unprofessional and dangerous decisions, but also in advising policymakers and other stakeholders about the wiser and best moves to make towards a human-centered society, in such that fomenting scientific knowledge and expanding cross cultural connections and joint research.
Scientists create hypotheses, test them through various methods such as statistics and data and evaluate conclusions based on the evidence provided.
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A certain atom has an atomic number of four. How many protons does it have?
Answer: 8 Protons
Explanation:
I think because consider the element helium. Its atomic number is 4, so it has four protons in its nucleus. Its nucleus also contains four neutrons. Since 4+4=8,the mass number of the helium atom is 8.
Answer:
beryllium 4 protons
Explanation:
1). Sammy was a normal, healthy boy. There was nothing wrong in his life to indicate that he was in anyway different from anyone else. When he completed highschool he obtained a job in a factory where he operared a large machine press. One day, his hand got caught in the press and was cut off. It was replaces with an artifical hand that looked and operated almost like a real hand.
Is Sammy Alive? Yes or No
Explain the Reasoning
Answer:
Sammy is not alive, the reason behind this is because the word was. If he were still alive, it would be is. Hope this helps! also can i please have brainliest? x
Explanation:
Yes, Sammy is alive. Losing his hand and getting an artificial one doesn't change his life status. Vital organs and biological processes determine life, not limb loss.
Yes, Sammy is alive. The incident of losing his hand and replacing it with an artificial hand does not necessarily mean he is no longer alive. The loss of a body part does not define one's life status. Being alive is determined by the functioning of vital organs and biological processes, which are not affected by the loss of a single limb.
Despite the accident, Sammy's heart is still beating, he can breathe, and his brain is functioning. The artificial hand enhances his quality of life and functionality, but it does not alter his life status. As long as his essential biological functions persist, he remains alive.
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Which molecule is incorrectly matched with its monomer?
a. nucleic acids; nucleotide
b. protein; amino acid
c. starch; lipid
Answer:
C. starch and lipid
Explanation:
Answer:
The answer to your question is c, starch; lipid.
Explanation:
a. nucleic acids; nucleotide This answer is not right because nucleic acids are composed by nucleotides then nucleotides are the monomers of nucleic acids.
b. protein; amino acid . This question is not right because proteins are composed by aminoacids that means that aminoacids are monomers of proteins.
c. starch; lipid. This question is right because starch is composed by monosaccharides so monosaccharides are monomers of starch not lipids.
Which of the following would be a limiting factor affecting the panda population of china?
a- capture of some pandas for placement in zoos
b- laws protecting habitat destruction
c- programs that educate people about endangered species
d- a disease that kills bamboo plants
Answer:
D
Explanation:
A limiting factor is an environmental condition or resource whose change has an influence on the size of the population of a species or community. In this case bamboo are a source of food for Pandas. A disease that reduces the number of bamboo trees in ecosystem causes the subsequent reduction of Panda population becasue there wil be less food and increased competition for the resource.
Answer:
A and D
Explanation:
a summary of the book tessa afshar
Answer:
Tessa was born in Iran and lived there for the first fourteen years of her life. She moved to England where she survived boarding school for girls and fell in love with Jane Austen and Charlotte Bronte, before moving to the United States permanently. Her conversion to Christianity in her twenties changed the course of her life forever.
Tessa holds an MDiv from Yale University where she served as cochair of the Evangelical Fellowship at the Divinity School. She serves on the staff of one of the oldest churches in America. But that has not cured her from being addicted to chocolate.
The “cause” for something to happen is the:
A. Effect
B. Feedback
C. Response
D. Stimulus
Answer:
d stimulus
Explanation:
The stimulus is what triggers an event, or its "cause". Therefore, option (D) is correct.
A stimulus is an internal or external force that causes an organism or system to respond or react. A physical event, an environmental change, or a particular input may start a series of events that result in an outcome or reaction.
In order to trigger a biological, physiological, or behavioural response in living things or a reaction in non-living systems, the stimulus serves as a catalyst. It acts as the catalyst for a chain of events that, depending on the situation, have the potential to produce an impact, feedback, or reaction.
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the cell membrane is a lipid bilayer, but a cell has only one cell membrane. which organelles in this lesson have a double membrane?
Answer:
The cell membrane is composed of two layers of phospholipids and is a fluid structure that's composed of four main molecules.DNA is transcribed into RNA within the nucleus and then RNA is transported to the cytoplasm.The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells. These membranes are flat sheets that form a continuous barrier around all cells.
Explanation:
The mitochondria and chloroplasts in plant cells, as well as the nucleus, are the organelles in a cell that possess a double membrane.
Explanation:The cell organelles that have a double membrane are the mitochondria and the chloroplasts in plant cells. These organelles are unique in that they have their own DNA separate from the rest of the cell, and this is protected within their double membrane structure. The nucleus, which houses the cell's main DNA, also has a double membrane. Hence, several organelles do indeed have a double membrane despite the cell itself having a single cell membrane, which is also known as a lipid bilayer.
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Which of these is considered to be the "king" of the social sciences
Geography
Economics
Sociology
Political science
Answer:
Economics is considered king amongst them
Economics is considered the 'king' of the social sciences.
Economics is a social science that studies the production and allocation of wealth in society.
Sociology examines human society, political science studies the governing of groups and countries, and geography focuses on spatial relationships and interactions among humans.
The top layer of soil in the tundra that thaws in the summer is called the _____.
A. active zone
B. dense mat
C. photic zone
D. permafrost
Answer:
Active zone
Explanation:
A scientific theory
A) Holds the highest level of acceptance
B) Explains a number of facts
C) Uses a specific hypotheses and descriptive laws that have been well-tested
D) All of the above
E) None of the above
All of the above statements describes scientific theory
Answer: Option D
Explanation:
A scientific theory is a clarification of a part of the characteristic world that can be more than once tried and confirmed as per the logical strategy, utilizing acknowledged conventions of perception, estimation, and assessment of results. Where potential, hypotheses are tried under controlled conditions in an examination.
In conditions not amiable to trial testing, speculations are assessed through standards of deductive thinking. Set up logical speculations have withstood thorough examination and epitomize logical information. The importance of the term scientific theory as utilized in the control science that is altogether unique in relation to the basic vernacular utilization of theory.
In ordinary discourse, the hypothesis can suggest a clarification that speaks to an unconfirmed and theoretical guess, while in science it depicts a clarification that has been tried and broadly acknowledged as substantial. These various utilization are practically identical to the contradicting uses of forecast in science versus basic discourse, where it signifies a simple expectation.
Which elements can form basic compounds? Check all that apply. sulfur rubidium arsenic selenium silicon xenon antimony
Final answer:
Among the elements listed, rubidium can form basic compounds like rubidium hydroxide, while silicon can react with strong bases to form silicates. The other elements mentioned are not typically known for forming basic compounds.
Explanation:
Elements that Can Form Basic Compounds
Among the elements listed, rubidium (Rb) is a metallic element that can form basic compounds known as oxides and hydroxides. For instance, rubidium hydroxide (RbOH) is a strong base. The element silicon (Si), while being a metalloid, can react with strong bases to form silicates, which are basic compounds. However, sulfur (S), arsenic (As), selenium (Se), antimony (Sb), and xenon (Xe) are typically not known for forming basic compounds. Arsenic, for instance, generally forms compounds with oxidation states of 3+ or 5+ and not typically basic in nature.
It is important to differentiate between basic compounds and acidic or amphoteric compounds as it affects the chemical reactions and properties of these elements. For chemistry students, understanding the properties and tendencies of elements to form certain types of compounds is essential in predicting chemical reactions and studying material characteristics.
The answers are:
B) Rubidium
C) Arsenic
E) Silicon
G) Antimony
What is found in group 1 and 4 on the Periodic table
Answer:
Group 1 - Alkali metals; Group 4 - Elemental Properties
Explanation:
The elements in Group 1 are called Alkali metals and those are: Lithium, Potassium, Rubidium, Celsium, Francium and Sodium and the elements in Group 4 are called: Titanium, Hafnium, Zirconium and Rutherfoundium.
It's important that group 4 has no trivial name like the group 1 does, it belongs to the grouping of transition metals and those metals have several general properties. They are found in the middle of the periodic table.
a planned procedure to test a hypothesis is called bias true or false
Answer: false
Explanation:
Bias is leaning in favor of an opinion or statement. A planned procedure to test a hypothesis is called an experiment
Which is a term for a decomposer?
O
A. Detritivore
O
B. Carnivore
O
C. Herbivore
O
D.Omnivore
The term for a decomposer in the context of biological relationships is a Detritivore. These organisms break down organic material into simpler substances, which provides nutrients for plants.
Explanation:In the context of biological relationships, a decomposer is best referred to as a Detritivore. Detritivores are organisms like bacteria, fungi, earthworms, and certain types of insects that aid in the process of decomposition.
They digest organic material, breaking it down into simpler forms of matter. This ultimately enriches soil and provides nutrients for primary producers (plants). This is different from a Carnivore, which primarily eats meat; a Herbivore, which primarily eats plants; and an Omnivore, which eats both plants and meat.
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Enzymes are able to increase the speed of a reaction because they accomplish which of these tasks
Answer: Activation Energy
Explanation:Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Answer:
They decrease the activation energy.
Explanation:
Sensory receptors that are sensitive to chemicals are found in the a. skin, body core, and hypothalamus. c. eyes. b. skin, skeletal muscles, and inner ears. d. nose and taste buds.
Answer:
Explanation:
B?
Answer:THE ANSWER IS D: nose and taste buds.
Explanation:the nose can smell Here's how it works: While you're chewing, the food releases chemicals that immediately travel up into your nose. These chemicals trigger the olfactory receptors inside the nose. They work together with your taste buds to create the true flavor of that yummy slice of pizza by telling the brain all about it!
what are thhe main differences between plant and animal cells
Answer:
A difference between plant cells and animal cells is that most animal cells are round whereas most plant cells are rectangular. Plant cells have a rigid cell wall that surrounds the cell membrane.
Explanation:
LO 5-3 How does the nervous
system communicate electrica
and chemical messages from
one part to another?
Final answer:
The nervous system communicates through an electrochemical process, where electrical signals within neurons are combined with chemical signals via neurotransmitters across synapses, enabling efficient transmission of messages throughout the body.
Explanation:
How the Nervous System Communicates
The nervous system uses an intricate electrochemical process to communicate messages across different parts of the body. This complex process involves both electrical signals within neurons and chemical messengers known as neurotransmitters to transmit information between neurons. Let's break this process down into understandable parts:
Electrical Signaling: Within a neuron, an electrical signal travels from the dendrites, through the cell body (soma), and along the axon to the nerve terminal.Chemical Signaling: Once the electrical signal reaches the axon's end, it triggers the release of neurotransmitters into the synapse, the gap between neurons. These chemical messengers then bind to receptor sites on the adjacent neuron, effectively transmitting the signal across the gap.This combination of electrical and chemical signaling allows for fast and efficient communication throughout the nervous system, enabling response to stimuli and coordination of activities.Through this powerful electrochemical mechanism, our nervous system controls everything from simple reflexes to complex thoughts and emotions.
Prompt
What are scientific models used for? Give an example of each of the following types of models: Idea, Physical, Computer.
Answer:
Scientific models are used to predict and elaborate the behaviour of the real objects in the field of physics, chemistry, ecology and earth science.
It is used to gain improved understanding of the processes and systems.
Explanation:
However, every model have some limitations because they are not the representative of every possible scenario. For instance, relationship between time and distance is the idea model, study of cell and its various parts uses physical model, predicting earthquake uses computer model.
All atoms of the same element contain the same number of
a. neutrons.
b. protons.
c. neutrons and electrons.
d. neutrons and protons.
Answer: The answer is B while neutrons and electrons are usually the same in a given atom protons are always consistent.
After you decide what information to collect in a descriptive investigation, you need to _____.
Answer:
Make Observations is your answer
Explanation:
Mark brainiest please
Answer:
Make Observations
Explanation:
i hope you have a great day and have a wonderful weekend
Which type of alternative energy can produce ethanol? A. hydropower energy B. solar energy C. biomass energy D. wind energy
Answer:
C. biomass energy
Explanation:
Alcohol may be formed in the process of biochemical changes in the decay of live matter.
C. Biomass energy is the kind of alternative energy than can produce ethanol.
Explanation:The biomass energy is a renewable source of fuel that is produced from corn and other plants. Ethanol has very widespread uses. It is used as fuels for vehicles, in alcohol and beverages, etc.
Apart from corn, Ethanol is also produced from sugar corn, sugar beets, trees, grasses, agricultural residues, etc. The most common way to produce ethanol from biomass is by using the yeast to ferment sugar and starch found in corns, sugar beets, and sugar canes.
which of the following statements is true of babies born to HIV-infected mothers?
"Babies born to HIV-infected mothers can be infected but asymptomatic." This is true. Therefore, option (3) is correct.
Some babies born to HIV-positive moms will contract HIV. Medical care can lower the risk of mother-to-child HIV transmission. The illness can worsen in asymptomatic newborns. HIV is transmitted by body fluids, not fertilisation.
Breastfeeding can transmit HIV, however antiretroviral medication for mum and baby and alternate feeding practises can reduce the risk. Proper medical care and prevention help prevent HIV transmission from moms to their children. Therefore, option (3) is correct.
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Your question is incomplete but your full question was:
Which of the following statements is true of babies born to HIV-infected mothers?
Babies can contract HIV during sperm/egg adhesion in the fertilization process.All babies born to HIV-infected mothers are infected with HIV.Babies born to HIV-infected mothers can be infected but asymptomatic.Babies seldom contract HIV through breast feeding by an infected mother.A taxi starts from Monument Circle and travels 5 kilometers to the east for 5 minutes. Then it travels 10 kilometers to the south for 10 minutes.
For each leg of the trip, the taxi's
stays the same, but its
The taxi is moving with reference to
changes
Reset
Next
Answer:
taxis take gas and a driver..
Answer:
A taxi starts from Monument Circle and travels 5 kilometers to the east for 5 minutes. Then it travels 10 kilometers to the south for 10 minutes.
The taxi is moving with reference to MONUMENT CIRCLE. For each leg of the trip, the taxi’s AVERAGE SPEED stays the same, but its AVERAGE VELOCITY changes.
Explanation:
An atom of argon has three electron shells, all of
which are full. Its atomic mass is 40. How many
neutrons does it have?
a. 8
c. 20
e. 24
b. 16
d.22
Argon, with an atomic number of 18 and an atomic mass of 40, contains 22 neutrons. This is calculated by subtracting the number of protons (18) from the atomic mass (40).
Explanation:The atom in question here is Argon. To understand the number of neutrons it contains, we need some basic knowledge of atomic structure and atomic mass. An atom consists of protons, electrons, and neutrons. Argon has an atomic number of 18, which tells us it has 18 protons. Electrons do not contribute significantly to the atomic mass, hence, the atomic mass is basically the sum of protons and neutrons.
Knowing that Argon has an atomic mass of 40 and that it has 18 protons, we can calculate the number of neutrons. Subtract the number of protons from the atomic mass (40-18), yielding the number of neutrons. So, Argon has 22 neutrons.
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