The heat released when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.590 M Ba(OH)2 is 5.90 kJ. The final temperature of the mixture is 25.354 °C.
We can use the following equation:
q = -ΔH_r * n
where:
q is the heat released (in J)
ΔH_r is the enthalpy change of the reaction (in J/mol)
n is the number of moles of the limiting reagent
The enthalpy change of the reaction is -118 kJ/mol. We need to calculate the number of moles of the limiting reagent.
Step 1: Calculate the moles of each reactant
moles of HCl = 0.500 M HCl * 0.100 L HCl = 0.0500 mol HCl
moles of Ba(OH)2 = 0.590 M Ba(OH)2 * 0.300 L Ba(OH)2 = 0.177 mol Ba(OH)2
Step 2: Determine the limiting reagent
The limiting reagent is the reactant that is completely consumed in the reaction.
To determine the limiting reagent, we need to compare the mole ratio of the reactants to the stoichiometric coefficient ratio of the reactants in the balanced chemical equation.
The balanced chemical equation for the reaction is:
2HCl(aq) + Ba(OH)2(aq) → BaCl2(aq) + 2H2O(l)
The mole ratio of the reactants is 2:1. The stoichiometric coefficient ratio of the reactants in the balanced chemical equation is also 2:1. Therefore, the limiting reagent is HCl.
Step 3: Calculate the heat released
q = -ΔH_r * n = -118 kJ/mol * 0.0500 mol = 5.90 kJ
Step 4: Calculate the final temperature of the mixture
We can use the following equation to calculate the final temperature of the mixture:
ΔT = q / (m * c_p)
where:
ΔT is the change in temperature (in °C)
q is the heat released (in J)
m is the mass of the mixture (in g)
c_p is the specific heat capacity of the mixture (in J/g °C)
ΔT = 5.90 kJ / (400 g * 4.18 J/g °C) = 0.354 °C
The final temperature of the mixture is 25.354 °C.
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In a watery environment polar amino acids want to have contact with
NEED A ANSWER FAST I THINK IT IS A PLZ HELP ME!!!!!
The study of anatomy is divided into two fields, gross anatomy and microscopic anatomy. Which of the following scenarios involves microscopic anatomy?
A histologist creates a tissue culture in the lab.
B doctor finds a broken bone in an injured patient.
C chiropractor determines the curve of the spine.
D medical student examines the heart of a cadaver.
Answer:
A to, since the tissues are the closet thing to cell, which microscopic anatomy studies.
Explanation:
Which group of minerals are the most abundant in the earth's crust?
Oxygen, silicon, iron and aluminum are the most abundant elements in the Earth's crust accounting for 88.1% of its mass.
What is Earth crust?The crust is defined as the outermost layer of the earth's surface and is made up of a large variety of igneous, metamorphic and sedimentary rocks. The crust lies beneath the mantle, while the upper part of the mantle is composed mostly of peridotite, a rock denser than the rocks common in the upper crust.
There are tectonic plates in this part of the Earth that provide a platform to all the land on Earth that was formed about 4.6 billion years ago, just after the Earth's crust solidified the planet. This part consists of several minerals such as Oxygen, silicon, iron and aluminum.
Thus, Oxygen, silicon, iron and aluminum are the most abundant elements in the Earth's crust accounting for 88.1% of its mass.
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Healthy epithelial tissues are important to a strong __________ system
Vikings colonized new areas while exploring and raiding the waters of which ocean?
Which area of the limbic system has considerable influence on the secretion of hormones throughout the body?
The hypothalamus.
The hypothalamus links the nervous system with the endocrine system. It's part of the limbic system but can also synthesizes and secretes hypothalamic hormones. These hormones will either stimulate or inhibit the pituitary gland, which releases hormones that go throughout the body to the glands and organs.
Hypothalamus is the part of the limbic system that has considerable influence on the secretion of hormones throughout the body.
Further Explanation:
The parts of the brain that are located under the temporal lobe sandwiching the thalamus collectively constitute the limbic system. The limbic system was first defined by Paul D. MacLean. The biggest area of the brain is occupied by the forebrain. The limbic system, the hypothalamus, thalamus, and the pineal gland are the structures of the forebrain. A tiny structure in the brain that is present just on the brain stem in between the cerebral cortex and midbrain is called the thalamus.
The part of the forebrain that lies beneath the thalamus is known as the hypothalamus. Hypothalamus means "under the thalamus" This part of the brain is responsible for the control and coordination of the autonomous nervous system, the pituitary gland secretion, the thirst, temperature and systems of homeostasis.
Two different sets of nerve cells that are present in the hypothalamus stimulates the production of the hormones. The maintenance of proper production of all the hormones is done by the gland. One set of the nerve cells transports the hormones produced by hypothalamus to the pituitary stalk from where the hormone is transported to the posterior lobe of the pituitary gland. These hormones (ADH and oxytocin) are then released in the bloodstream.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: The limbic System.
Keywords:
Brain, forebrain, thalamus, limbic system, pineal gland, hypothalamus, temperature, sleeping, reproductive functions, amygdala, hippocampus, mid brain, cerebral cortex, limbic system.
The term ____________ describes cellular respiration in the absence of ____________ . oxygen is the final electron acceptor in ____________ respiration. the breakdown of organic molecules without oxygen is called ____________ . during fermentation, yeast break down pyruvate into ____________ and acetaldehyde. aerobic respiration produces ____________ molecules whereas anaerobic respiration produces ____________ molecules.
The term anaerobic describes cellular respiration in the absence of oxygen. Oxygen is the final electron acceptor in aerobic respiration.
What is respiration?Respiration is the process of releasing energy from food through oxidation. Aerobic along with anaerobic respiration are the two kinds of respiration.
Aerobic means "with air," and it refers to the body's use of oxygen to produce energy. This usually refers to any exercise that lasts more than two minutes.
Aerobic 'steady state' exercise is performed continuously. Anaerobic refers to the body producing energy without the use of oxygen.
The term anaerobic refers to cellular respiration that occurs in the absence of oxygen. In aerobic respiration, oxygen is the final electron acceptor.
Fermentation is the breakdown of organic molecules in the absence of oxygen. Yeast converts pyruvate to carbon dioxide and acetaldehyde during fermentation.
Aerobic respiration generates 34-38 ATP molecules, whereas anaerobic respiration generates only two.
Thus, these are the complete sentences for the given scenario.
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statistics about the climate in a tundra ecosystem were collected for 30 years. which hypothesis about a population of caribou could be made based on the climate data collected?
a. caribou calf survival is directly related to annual rainfall amounts.
b. an outbreak of disease in 1984 killed 35% of the caribou population.
c. caribou remain with the same mate throughout their lifetime.
d. mortality of caribou from hunters was less than 5%.
Answer: a. Caribou calf survival is directly related to annual rainfall amounts.
Explanation:
A hypothesis can be define as the presupposed explanation of the cause of natural event or natural phenomena. It exhibit some kind of evidences and facts that are required to be tested on the basis of suitable scientific methodology.
Among the given options, a. Caribou calf survival is directly related to annual rainfall amounts. is the correct option because here the population of the surviving Caribou calf can be compared with the recorded or measured amounts of annual rainfall. Hence, the information is testable by scientific procedures therefore, it is an example of hypothesis.
Inside the epiphyses of each long bone, mostly ________________ can be found.
a. compact bone
b. spongy bone
c. cartilage
d. yellow marrow
The features found only in plant cells, only in animal cells, or in both plant and animal cells:
Process that means living things give rise to the same living thing
whats kinds of food are proteins found in?
Describe what happens to chromosomes before mitosis.
Part a - the cell cycle drag the pink labels onto the pink targets to identify the two main phases of the cell cycle. then drag the blue labels onto the blue targets to identify the key stages that occur during those phases.
The two main stages of the cell cycle are interphase and M phase. Interphase is further segregated into G1, S, and G2 phase while the M phase is segregated into prophase, metaphase, anaphase, and telophase.
Further Explanation:
The cell cycle refers to an ordered flow of events which includes cell growth as well as cellular division. This cycle produces 2 new daughter cells. The cycle starts with interphase; during which, the cell grows and replicates its own DNA or deoxyribonucleic acid. The interphase begins with:
1. G1 phase: This is the primary growth phase provide nutrient to the cell.
2. S phase or synthesis of DNA: During this phase, the replication of DNA takes place. The centrosome is divide and forms mitotic spindle during the mitosis phase.
3. G2 or second gap: during this phase, the cell mainly replenishes its energy stores as well as synthesizes the proteins which are required for the chromosome manipulation.
The second phase of the cell cycle is the mitosis or M phase. Mitotic phase refers to a multiphase process during which the chromosomes are aligned, segregated, and moved into the 2 new daughter cells which are identical to each other.
This phase starts with:
1. Prophase: During this phase, the condensation of the chromosomes takes place and these chromosomes become visible. Spindle fibers formation take place, breakdown of the nuclear envelope, and nucleolus disappear.
2. Metaphase: During this phase, the formation of spindle fibers is completed and centrosomes are found at the opposite terminals of the cell. The chromosomes line up at the metaphase plate. Each of the sister chromatids is linked to the spindle fiber starting from the opposite poles.
3. Anaphase: During this phase, the cohesion proteins link with the sister chromatids and splits them down. The sister chromatids are pulled towards the opposite terminals of the cell and the non-kinetochore spindle fibers mainly lengthen and elongate the cell.
4. Telophase: During this last phase, the chromosomes arrive at the opposite terminals and start to decondense. Nuclear envelope reappears, and mitotic spindle breaks down. This marks the end of the mitosis.
The end phase of the cell cycle is called cytokinesis wherein the cleavage furrow occurs are segregates the daughter cells. In plant cells, the cell plate is responsible for the segregation of the daughter cells.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Cell Cycle
Keywords:
Cell cycle, cell division, cell growth, interphase, M phase, mitotic phase, mitosis, G1, S phase, G2 phase, cytokinesis, metaphase, animal cell, telophase, plant cell, prophase, anaphase.
What were the common causes and risk factors found between the majority of the skin disorders?
In healthy, physically fit women, _______ exercise is related to _____ birth weight.
Two students are investigating the relationship between net force and acceleration on an object. They tie a string to a 1-kg block resting on a horizontal table. The string is run over a pulley and attached to a 100-gram weight hanging above the floor. The acceleration of the block is then calculated as the block falls to the floor.
Which statement would best describe the greatest source of error in this investigation and suggest a reasonable method to reduce this error?
A) The block would have friction and a dynamic cart could be used.
B) The block on the table has too much mass and should be increased
C) The falling mass is too small to accelerate the block and should be increased.
D) A pulley has friction and the hanging mass should be replace with a spring scale.r
The correct answer is actually A) The block would have friction and a dynamic cart could be used.
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What brain structure relays information from the eyes to the visual cortex?
An ecosystem that has a high level of _______ is able to fill all of its niches.
A. salt water
B. pollution
C. biodiversity
D. carbon dioxide
Answer:
its definitely C. biodiversity
Explanation:
I got it right on Study Island
The fact that both green and yellow peas were produced by tall pea plants in predictable frequencies led mendel to propose the
Restrictive pulmonary disease resulting from prolonged inhalation of fine dusts is termed:
Which of the following statements explains how carbon enters the soil during the carbon cycle? A. /Carbon enters the soil when decomposers produce it. /B.Carbon enters the soil when organisms die and become fossilized /C. Carbon enters the soil when humans perform respiration and exhale it. /D. Carbon enters the soil when plants make glucose and deposit it into the soil.
whats the answer A/B/C OR /D
Carbon is deposited into the soil through decomposers which digests and generate carbon when organisms die and become buried beneath the soil. This process also is observed during the carbon cycle. Carbon cycle is a biogeochemical cycle where the transfer of carbon from the different spheres of the earth occurs. This involves the geosphere, hydrosphere, atmosphere, pedosphere and most especially, the biosphere.
Carbon enters the soil when plants make glucose and deposit it into the soil.
Explanation:The correct statement that explains how carbon enters the soil during the carbon cycle is Option D. Carbon enters the soil when plants make glucose and deposit it into the soil. During photosynthesis, plants convert carbon dioxide from the atmosphere into glucose, which is then used for growth or stored in the roots and leaves. As plants decay or are consumed by decomposers, the carbon is released back into the soil as organic matter.
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The _____ detect shades of grey and is/are responsible for peripheral vision, which the ______ is/are responsible for color vision and seeing fine detail.
In what sphere of the earth is eutrophication a problem?
Correct Answer:
Biosphere
In bio-sphere, sphere of the earth is eutrophication a problem.
What is eutrophication?The procedure of eutrophication involves the gradual enrichment of a body of water, or portions of it, with minerals including nutrients, especially nitrogen and phosphorus. The phrase "nutrient-induced rise in phytoplankton productivity" is now being used to describe it.
What is bio-sphere?The biosphere also referred to as the ecosphere, would be the totality of all ecosystems on the planet. It is also known as the Earth's life zone. With few inputs or outputs, the biosphere would seem to be essentially a closed system with respect to the matter.
The waste materials from people and industries, and nutrient pollution, such as nitrogen pollution, have always been the most prevalent types of pollution in the biosphere.
Therefore, In biosphere, sphere of the earth is eutrophication a problem.
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What does atp stand for? what is its main function in the cell? how many phosphate groups does it have?
It is important to mention the general term non physician practitioner (npp), which includes non physician clinicians (npcs) and midlevel practitioners (mlps) and also referred to as physician expanders.
Which important complex is formed due to complimentary binding at the enzyme active site?
A.) Enzyme product complex
B.) Enzyme substrate complex
C.) Substrate product complex
What is the average age of menarche (first menstruation)?
The average age of the first menstruation in America is around 12 but everyones ages can vary
Most living organisms consist of more than 70% water by weight true or false
The surgical repair of a vessel is _____.