Answers
Answer:
. 750 M
Explanation:
Related Questions
draw the structure for 2-methyl-3-propalhex-2-yne
Answers
The structure for 2-methyl-3-propalhex-2-yne can be shown in the image attached.
How do you draw the structure of a compound?We know that a compound is composed of atoms that can be found in the compound. For the organic compound, we can see that we can be able to obtain the structure of the compound from the structure.
The compound as we can see is 2-methyl-3-propalhex-2-yne. The structure of the compound must be able to include a double bond as we can clearly see from the image that is attached to this answer.
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Heart, 5 stars, Brainiest, and 40 coins if right! Answer needed ASAP
Which statement describes what happens when Bret runs up a flight of stairs?
A. His kinetic energy is destroyed.
B. His potential energy decreases.
C. His kinetic energy is converted into potential energy.
D. His potential energy is converted into kinetic energy.
Answers
Answer:
His kinetic energy is converted into potential energy.
Explanation:
The molecules that make up soap have a region that contains polar covalent bonds and a region that contains nonpolar covalent bonds. How does this property explain the ability of soap molecules to help remove oils from your skin when you wash?
Answers
Explanation:
The cleansing action of soaps is predicated on the nature of soaps as we have it.
A soap has the ability to remove dirt from materials. The cleansing action of a soap is related to the structure of its molecule. A molecule of soap has dual structure with polar head that is water loving and a long hydrocarbon tail which is hydrophobic. The structure enables soap molecules to emulsify an organic dirt present on a fabric in water. The soap causes the suspension of tiny oil droplets in the aqueous medium.Please help ASAP! - Calculate the density of air at exactly 35°C and 1.00 atm (assuming that air is 80.0 percent N2 and 20.0 percent O2).
Answers
The density of air at exactly 35°C and 1.00 atm (assuming that air is 80.0 percent N2 and 20.0 percent O2 is 1.1 g/L.
What is density?Density is described as the substance's mass per unit of volume.
Density of a gas d is given as = PM/ RT
where d ⟶ Density of the gas
P ⟶ Pressure of the gas
M⟶ Molar Mass of the gas
R⟶ Universal Gas Constant
T⟶ Absolute temperature
we have that the pressure of air is P=1.00 atm, and the temperature is T=35∘C=308K. The molar mass of air can be assumed to be the weighted average of its components.
The air is 80% nitrogen and 20% oxygen, so 1 mole of air will contain 0.80 moles of nitrogen and 0.20 moles of oxygen. So, the molar mass of air will be:
Molar Mass of air= 0.80 MN2 + 0.20MO2 = 0.80 (28.00g/mol) + 0.20 (32.00g/mol) = 28.8 g/mol
Substituting the values into the equation of d = PM/ RT, we have
density = 1.1g/L
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which element has the electrons configuration 1s22s22p63s23p64s23d104p2
Answers
The element with the electron configuration 1s22s22p63s23p64s23d104p2 is Silicon (Si).
Explanation:
The electron configuration of an element describes the arrangement of electrons in its atoms. The numbers and letters in the configuration represent the energy levels (n), sublevels (s, p, d, f), and the number of electrons in each sublevel.
In this case, the electron configuration of the element is:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2
Breaking this down, we can see that the element has:
- 2 electrons in the 1s sublevel
- 2 electrons in the 2s sublevel
- 6 electrons in the 2p sublevel
- 2 electrons in the 3s sublevel
- 6 electrons in the 3p sublevel
- 2 electrons in the 4s sublevel
- 10 electrons in the 3d sublevel
- 2 electrons in the 4p sublevel
Based on the number of electrons in the outermost energy level (valence electrons), we can determine that this element is in group 14 of the periodic table. Looking at the periodic table, we can see that the
Which of the items below is a colloid?
a.fruit salad b.gelatin c.lacquer
Answers
Answer:
b. gelatin
Explanation:
a homogeneous noncrystalline consisting of large molecules or ultramicroscopic particles of one substance.
Directions: Answer each of the questions below.
1. Explain Wegener's theory of the first supercontinent.
2. Describe the three types of convergent boundaries.
3. What do scientists use to study the ocean floor? Describe the tools.
4. Why is the theory of plate tectonics important to scientists and the study of the earth?
5. What is the most important topographic feature of the ocean floor? Why?
Answers
1) The continental drift theory explains the existence of Pangea as a supercontinent. 2) Between oceanic plates, between continental plates, between an oceanic and a continental plate. 3) technologies like submersibles, sonar, and satellites 4) because it explains volcanoes, mountains, and earthquakes formation and occurrence. 5) Abyssal plains, oceanic trenches, oceanic ridges, fracture zones, continental shelves.
What is Wegener's theory?Wegener proposed for the first time the theory of continental drift.
This theory states is based on the fact that the crust is divided into several plates that can displace over the flowing mantle. The continental drift theory explains how these movements have been taking place for millions of years ago.
Wegener thought that continents were once all together in one big continent named Pangea, and with time, they split and separated into many pieces. These pieces are the current continents.
This theory was heavily criticized and needed many pieces of evidence to be accepted. They involved paleontological, geological, and bathymetry evidence, among others.
What are convergent boundaries?Convergent boundaries refer to two plates moving forward to each other and ending up colliding and causing the deformation of one or both plates.
Two oceanic plates might collide ⇒ subduction
The thickest and oldest plate subduces and causes a deformation on the other plate edge, creating an oceanic trench through which magma rises. Island arcs or insular volcanic arcs are created.
Two continental plates might collide ⇒ obduction
Both plates are too light to subduce (equally dense), so neither of them sinks under the other one.
Occurs a vertical deformation on both plates' edges, which remain attached by a suture area. The result is an inland mountain chain formation.
Oceanic plate and continental plate collide ⇒ Subduction
The oceanic crust sinks under the continental plate, and magma rises to the surface by crevices.
The result is the formation of mountain chains or volcanic chains due to the deformation caused on the continental plate edge.
What do scientists use to study the ocean floor?Different technologies are used to study the ocean floor. To mention a few,
Submersibles are watercraft used to operate underwater. It collects information about the water column and the ocean floor. Sonars are based on sound waves and can be used to measure the ocean's deepness and to create seafloor maps. Satellites are used to create a map seafloor and determine the ocean depth and floor shapes.Remotely operated vehicles are used to explore parts of the ocean.Dredges and gravity corers are used to collect material from the sea bottom. What is the tectonic plate theory?The tectonic plates theory is based on the continual movements of the crust and might explain the movement of the different plates, and their directions and interactions.
This theory became important because it explains how volcanic formation occurs, how mountains emerge, and erathquakes are produced. These events are closely related to tectonic plate movements and their interaction.
Divergent, convergent and transforming boundaries are always linked to these events.
What are the most important topographic feature of the ocean floor?There are five significant features,
Abyssal plains are large and relatively flat areas that cover most of the bottom.Oceanic trenches are deep depressions that can reach great depths. These trenches are associated with most volcanic activities that are parallel to them and global seismic activity.
Oceanic ridges are extensive mountain chains on the ocean floor. These are created in divergent boundaries as plates separate. They have elongated ruptures from which magma and hot water emerge. Some species can inhabit close to these fractures, taking advantage of minerals and warmer temperatures.Large fracture zones separate sections of the mountain ranges. The seabed has different depths and different ages on each side of these fractures. When fractures are too close to each other, they are referred to as fracture zones. These zones are also associated with seismic activity. Extensive continental shelves.
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When 161.0 mL of water at 26.0°C is mixed with 41.0 mL of water at 85.0°C, what is the final temperature
Answers
Answer: The final temperature is \(38.0^0C\)
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
\(heat_{released}=heat_{absorbed}\)
\(Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})\)
\(-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)]\)
\(-[m_1\times (T_{final}-T_1)]=[m_2\times (T_{final}-T_2)]\) (as \(c_1=c_2\))
Q = heat absorbed or released
\(m_1\) = mass of water at \(85.0^0C\) = \(volume\times density=41.0ml\times 1g/ml=41.0g\)
\(m_2\) = mass of water at \(26.0^0C\) = \(volume\times density=161.0ml\times 1g/ml=161.0g\)
\(T_{final}\) = final temperature = ?
\(T_1\) = temperature of 41.0 ml of water = \(85.0^0C\)
\(T_2\) = temperature of 161.0 ml of water = \(26.0^0C\)
Now put all the given values, we get
\(-[41.0\times (T_f-85.0)^0C]=161.0\times (T_f-26.0)^0C\)
\(T_f=38.0^0C\)
Thus the final temperature is \(38.0^0C\)
what are potential sources of error in rate of reaction lab with hcl and calcium carbonate?
Answers
Answer:
human error , random error .
13. Which of the following correctly provides the names and formulas of polyatomic ions?
chromate: Cro42 -; dichromate: Cr2O7 2 -
O nitrite: NO -; nitrate: NO2
sulfite: S 2-; sulfate: SO3
O carbonate: HCO3 -; bicarbonate: C03
Answers
Answer HCO3
Why atoms in our body don’t
eject electrons?
Answers
Answer:
When there are too many protons, some of the outer protons are loosely bound and more free to react with the electron. But most atoms do not have too many protons, so there is nothing for the electron to interact with. As a result, each electron in a stable atom remains in its spread-out wavefunction shape.
In an atom, there is a nucleus made up of neutral charged, neutrons, and positively charged protons. The reason why electrons which are negatively charged, don't fly off is due to its stronger attraction to the protons. ... This, however, still allows the electrons to move around the nucleus of an atom.
What the expected outcome is, if the MDS is successfully implemented
Answers
If the MDS (Minimum Data Set) is successfully implemented, several positive outcomes can be expected. The MDS is a standardized assessment tool used in healthcare settings to evaluate the physical, mental, and psychosocial well-being of patients.
Its successful implementation can lead to improved patient care, more efficient resource allocation, and enhanced data analysis.With the MDS in place, healthcare providers can gather consistent and comprehensive data about patients, enabling better understanding of their needs and tailoring of individualized care plans.
This can result in improved treatment outcomes and patient satisfaction. Additionally, the MDS facilitates effective communication and information sharing among healthcare professionals, leading to coordinated care and reduced errors.From a broader perspective, successful implementation of the MDS allows for accurate and reliable data collection, enabling robust research and evidence-based decision-making.
This can contribute to advancements in healthcare practices, policy development, and quality improvement initiatives. Ultimately, the successful implementation of the MDS can enhance patient outcomes, improve healthcare delivery, and drive positive changes in the healthcare system as a whole.
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What is an ecosystem? ?
Answers
Answer:
An ecosystem is a community or group of living organisms that live in and interact with each other in a specific environment.
Explanation:
That's the most straight forward explanation I could come up with
When the following solutions are mixed together, what precipitate (if any) will form?
a. Hg(NO,)(ag) + CuSO (ag)
b. Ni(NO,)(ag) + CaCh(ag)
c. K;COg(ag) + Mgl.(ag)
d. Na;CrO.(ag) + AlBs(ag)
Answers
The precipitates that will be formed respectively from the reactions would be:
\(HgSO_4\)No precipitate \(MgCO_3\) \(Al_2 (CrO_4)_3\)What are precipitation reactions?Precipitation reactions are reactions during which two aqueous salt solutions combine to produce one aqueous and one insoluble salt.
Following this definition, the precipitates that will be formed from each of the reactions can be deduced as follows:
\(Hg_2(NO_3)(aq) + CuSO_4 (aq) --- > HgSO_4 (s) + CuNO_3 (aq)\). The precipitate here is \(HgSO_4\)\(Ni(NO_3)_2(aq) + CaCl_2(aq) --- > NiCl_2 (aq) + Ca (NO_3)_2 (aq)\). No precipitate is formed here.\(K_2CO_3(aq) + Mgl_2(aq)--- > KI (aq) + MgCO_3 (s)\). The precipitate formed here is \(MgCO_3\)\(Na_2CrO_4(aq) + AlBr_3(aq) --- > NaBr (aq) + Al_2 (CrO_4)_3 (s)\). The precipitate formed here is \(Al_2 (CrO_4)_3\)The production of precipitates follows solubility rules. Some of the rules are:
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Which of the following will affect the rate of a chemical reaction?
solution temperature
solution color
solute mass
solution volume
Answers
Answer:
Solution temperature.
Explanation:
Hello there!
In this case, considering this question about chemical kinetics, it will be possible for us to analyze two perspectives:
1. Molecular: here, we infer that the solution temperature will provide more energy to the molecules in order to undergo more effective crashes which will make more products and therefore, increase the rate constant.
2. Mathematical: by means of the Arrhenius equation, it will be possible to tell that the increase in the temperature of the system, the negative of the exponent present in such equation will increase and therefore turn the rate constant bigger.
In such way, we infer the answer is solution temperature.
Regards!
Question 6
How many significant figures are there in 31.1100?
Answers
Answer:
6 sig figs
Explanation:
sig figs are numbers that are more than 0, but in this case, after the decimal, the 0's at the end count as sig figs as well
There are 6 significant numbers in 31.1100.
If there is no decimal point in the figures then it will be 4 but since there is a decimal point then it is 6 significant figures.
Your little sister asks you a scientific question: "Does chocolate milk come from brown cows?" In order to answer the question, you decide to form a hypothesis.
Explain whether or not the following statements are effective hypotheses.
i. Brown cows produce chocolate milk.
ii. Brown cows never produce chocolate milk.
iii. Brown cows produce white milk.
Answers
A hypothesis is a proposed explanation or prediction based on limited evidence or observations, which can be tested through further investigation or experimentation. It should be specific, testable, and based on existing knowledge.
Now, let's evaluate each statement as a hypothesis:Brown cows produce chocolate milk.This statement can be considered an effective hypothesis as it proposes a relationship between the color of cows and the color of milk they produce. It is specific and testable, as one could observe and analyze the milk produced by brown cows to see if it is indeed chocolate milk. However, based on existing knowledge, we can confidently say that this hypothesis is not accurate, as the color of a cow does not determine the color of the milk it produces.Brown cows never produce chocolate milk.This statement can also be considered an effective hypothesis because it makes a specific claim that can be tested. However, based on existing knowledge, we can say that this hypothesis is not accurate. While the color of a cow does not determine the color of the milk, it is possible for chocolate milk to be produced by adding chocolate syrup or cocoa powder to regular white milk.Brown cows produce white milk.This statement is not an effective hypothesis as it is a general statement that aligns with existing knowledge. It does not propose any specific relationship or prediction to be tested. In the context of this question, the statement is not accurate as milk produced by cows is typically white, regardless of their coat color.For such more question on hypothesis
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3. The doctor notices that Janet has long fingernails, and comments that fingernails grow at a rate (or
speed) of 2.50 cm / year. Convert this speed to kilometers / second. Show your work. (6 pts)
Answers
Answer:
7.93 × 10⁻¹³ km/s
Explanation:
Step 1: Given data
Rate of growth of the fingernails (r): 2.50 cm/year
Step 2: Convert "r" from cm/year to km/year
We will use the following conversion factors.
1 m = 100 cm1 km = 1000 m\(\frac{2.50cm}{year} \times \frac{1m}{100cm} \times \frac{1km}{1000m} = 2.50 \times 10^{-5} km/year\)
Step 3: Convert "r" from km/year to km/s
We will use the following conversion factors.
1 year = 365 day1 day = 24 h1 h = 60 min1 min = 60 s\(\frac{2.50 \times 10^{-5} km}{year} \times \frac{1year}{365day} \times \frac{1day}{24h} \times \frac{1h}{60min} \times \frac{1min}{60s} = 7.93 \times 10^{-13} km/s\)
2.50 cm/year is equal to 7.93 × 10⁻¹³ kilometers/second.
Where are the most gases located on the periodic table?
Answers
Answer:
They are mostly located in group 18 (column 18), or far right
_____ resources are resources that cannot be replenished within a lifetime.
Question 1 options:
Nonrenewable
Renewable
Living
Endangered
Answers
Answer:
Non Renewable would be correct option
Explanation:
Non Renewable resources are resources that cannot be replenished within a lifetime.
These resources cannot be replaced after once used.
Examples of Non Renewable resources are Coal , Petroleum & gas etc .
2. Which state of matter is characterized by particles that are close to each other but are not arranged in a definite pattern?
A)liquid
B)plasma
C)solid
D)gas
Answers
Answer:
Solid
Explanation:
Cus its solid, take a brick for example. It's hard and has no space unlike liquid or gas.
Plz answer this question giving brainliest
Answers
How many grams of water (H2O , GFW = 18.02 g/mol) will be produced when 35.8 grams of calcium hydroxide (Ca(OH),
„GFW = 74.10 g/mol) reacts with hydrochloric acid?
Answers
17.42 grams of water (H₂O) will be produced when 35.8 grams of calcium hydroxide (Ca(OH)₂) reacts with hydrochloric acid.
Given,
Mass of calcium hydroxide (Ca(OH)₂) = 35.8 grams
Molar mass of calcium hydroxide (Ca(OH)₂) = 74.10 g/mol
Molar mass of water (H₂O) = 18.02 g/mol
The balanced equation for the reaction between calcium hydroxide and hydrochloric acid is: Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O
For every 1 mole of calcium hydroxide that reacts, 2 moles of water are produced.
Moles = Mass / Molar mass
Moles of Ca(OH)₂ = 35.8/ 74.10 ≈ 0.483 mol
Moles of H₂O = 2 × Moles of Ca(OH)₂ = 2 × 0.483 = 0.966 mol
Mass = Moles × Molar mass
Mass of H₂O = 0.966 × 18.02 ≈ 17.42
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Electrochemical cells generate electricity from which of the following? Select all that apply.
electron transfer
flow of electrons
dissolving an ionic compound
redox reactions
Answers
By a redox reaction that involves the transfer of electrons, often through the dissolution of an ionic substance, electrochemical cells produce electricity from the flow of electrons.
What fuels the production of energy by electrochemical cells?In electrochemistry, redox or oxidation-reduction reactions, in which electrons travel from one element to another, can produce electricity. Redox processes involve the transfer of electrons from one substance to another.
In what element are electrochemical cells made?Batteries use a very significant class of oxidation and reduction reactions to produce useable electrical energy. Using solutions of respective sulphates, copper and zinc metals can be combined to create a straightforward electrochemical cell.
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Using the summary questions, clearly define the dependent and independent variables of the
experiment
Independent
Variable:
Dependent
Variable:
Answers
Answer:
Independent variable: materials.
Dependent variable: how secure the latches are.
Explanation:
IV is something this is changed (materials in this case such as clay and wood).
DV is something which is measured (the security of the latch).
Hope this helps :)
Answer the boxes in the image
Answers
Answer: the c thingy is where you be like burgundy sauce then be like racial slair is what it mean's so the name thingy
Explanation:
How many ways can you recall to synthesize
Answers
there are an infinite number of ways to synthesize an answer to a question, including the following:
Summarize the key points in a concise manner.
Provide a detailed explanation of the topic.
Use examples or analogies to illustrate the concept.
Break down the answer into smaller, more digestible pieces.
Address potential counterarguments or alternative perspectives.
Incorporate relevant statistics or data to support the answer.
Compare and contrast different aspects of the topic.
Provide historical context or a timeline of events.
Use a storytelling approach to engage the reader.
Use a Q&A format to organize the information.
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For each of the following amounts, calculate the mass
of the sample:
a) 5.32 mol barium iodide, Balz
b) 17.8 mol sulfur dioxide, SO2
c) 1.25 mol AspirinTM, CHO4
d) 0.234 mol magnesium nitrite, Mg(NO2)2
Answers
The masses of the following amount of compound are as follows:
a. 2080.12 grams of barium iodide
b.1139.2 grams of sulphur dioxide
c. 96.25 grams of AspirinTM
d. 27.144 grams of magnesium nitrite
The molarity formula is represented as follows;
molarity = mass / molar mass
Recall we are ask to find the masses of the compounds. Therefore,
mass = molarity × molar massMass of BaI₂a 5.32 mol barium iodide, BaI₂
molarity = 5.32 mol
molar mass of BaI₂ = 137 + 127(2) = 137 + 254 = 391 g/mol
mass = 5.32 × 391 = 2080.12 grams.
Mass of SO₂b. ) 17.8 mol sulphur dioxide, SO₂
molarity = 17.8 mol
molar mass of SO₂ = 32 + 32 = 64 g /mol
mass = 17.8 × 64 = 1139.2 grams.
Mass of CHO₄c. 1.25 mol AspirinTM, CHO₄
molarity = 1.25 mol
molar mass of CHO₄ = 12 + 1 + 64 = 77 g / mol
mass = 1.25 × 77 = 96.25 grams
Mass of Mg(NO₂)₂d. 0.234 mol magnesium nitrite, Mg(NO₂)₂
molarity = 0.234 mol
molar mass = 24 + 14(2) + 32(2) = 24 + 28 + 64 = 116 g/mol
mass = 116 × 0.234 = 27.144 grams.
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How do scientists build on previous work when developing theories
Answers
d=ut+5 make u the subject
Answers
Explanation:
d=ut+5
d-5=ut
d-5/t=u
!!!!!!!