Answers
Answer:
industrial lab safety, therefore, is critical to safeguard the health and well-being of these technicians, as is the protection of equipment, products, samples, supplies and the facility itself. The importance of testing lab safety cannot be overstated; it helps keep all of these components — most notably, workers — out of danger.
Safety is important in middle-school and high-school science labs to ensure students and teachers stay out of harm's way. Science classrooms often have equipment -- such as Bunsen burners, chemicals and sharp tools -- that pose potential hazards if used improperly. Teachers and school administrators don't have the time or the budget to deal with liability lawsuits, and dangerous incidents could damage the school's and the teacher's reputation.
Explanation:
this should answer all 4
Related Questions
Step 6: Measure Pressure and Volume with the Book and 1 kg of Weight?
Answers
Step 6 Answers:
1) 1.498
2) 1.18
3) 43.5
4) 51.3
Answer:
ohnormaan
1) 1.498
2) 1.18
3) 43.5
4) 51.3
Explanation:
this person is correct i am in chemistry honors on edgen and it was correct
Which statement correctly describes property of a type of matter
Answers
Answer:
Air is a mixture of gases
2.59 Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the following elements: (a) Ga and F, (b) Li and H, (c) Al and I, (d) K and S.
Answers
Answer:
(a) GaF3, gallium(III) fluoride
(b) LiH, lithium hydride
(c) AlI3, aluminum(III) iodide
(d) K2S, potassium sulfide
Keisha finds instructions for a demonstration on gas laws.
1. Place a small marshmallow in a large plastic syringe.
2. Cap the syringe tightly.
3. Pull the plunger back to double the volume of gas in the syringe.
Which best describes the purpose and outcome of the demonstration?
This is a demonstration of Charles’s law. As the volume increases, the temperature decreases, and the marshmallow will freeze.
This is a demonstration of Charles’s law. As the volume increases, the temperature increases, and the marshmallow will melt.
This is a demonstration of Boyle’s law. As the volume increases, the pressure decreases, and the marshmallow will grow larger.
This is a demonstration of Boyle’s law. As the volume increases, the pressure increases, and the marshmallow will shrink.
Answers
Following best describes the purpose and outcome of demonstration: This is demonstration of Boyle's law. As volume increases, the pressure decreases and marshmallow will grow larger.
What are gas laws?Gas laws are set of fundamental principles that describe the behavior of gases under different conditions of temperature, pressure, and volume.
These laws include Boyle's law, Charles's law, Gay-Lussac's law, and the combined gas law. These laws help to predict the behavior of gases in different situations and can be used to determine properties such as temperature, pressure, volume, and the number of moles of gas present.
Boyle's Law explains that volume of gas increases as the pressure decreases.
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What is the molarity of a 4.286 L solution
that is made from 18.60 g of NaCl?
Answers
Answer:
it's answer is 0.074M
Explanation:
C=mass/volume
M=C/molar mass
M=4.33g/l/58.5g
= 0.074M
Increasing the temperature increase the rate of a reaction by doing which of the following
Answers
Answer:
Increase in temperature increases the average kinetic energy of the reactant molecules, hence lowering the activation energy of the reaction.
A sample of oxygen has a volume of 25.00 mL with a pressure of 2.0 atm. What pressure (in atm) will the sample of O2 gas occupy at 100.0 mL?
Answers
Answer:
0.5 atmExplanation:
The final pressure can be found by using the formula for Boyle's law which is
\(P_1V_1 = P_2V_2\)
Since we are finding the new pressure
\(P_2 = \frac{P_1V_1}{V_2} \\\)
From the question we have
\(P_2 = \frac{25 \times 2}{100} = \frac{50}{100} = \frac{1}{2} \\ \)
We have the final answer as
0.5 atmHope this helps you
A researcher is studying gold complexes. She makes
a 125 mL solution of gold(III) chloride by dissolving
0.144 moles of the solute into water. Which of the
following would cause the concentration of the
solution to increase?
Additional gold(III) chloride is added to the
beaker.
Part of the solution is poured into the chemical
waste.
O Water is added to the beaker.
We do not have enough information to answer
this question.
Answers
Additional gold(III) chloride is added to the beaker. This would cause the concentration of the solution to increase. Therefore, the correct option is option A.
Concentration in chemistry refers to the quantity of a material in a certain area. The ratio of the solute within a solution to the solvent or whole solution is another way to define concentration. In order to express concentration, mass / unit volume is typically used.
The solute concentration can, however, alternatively be stated in moles or volumetric units. Concentration may be expressed as per unit mass rather than volume. Although concentration is typically used to describe chemical solutions, it may be computed for any mixture. Additional gold(III) chloride is added to the beaker. This would cause the concentration of the solution to increase.
Therefore, the correct option is option A.
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provide the missing reagents and aromatic compounds in the reaction scheme. show formal charges if applicable. the nitro group can be found in the groups menu. note that this question provides no targeted feedback.
Answers
One of the most widely used explosophores—functional groups that give a compound its explosive properties—in the world is the nitro group. Also strongly electron-withdrawing is the nitro group. This property allows for the possibility of acidic C-H bonds that are alpha to the nitro group (nearby).
How can you recognize a nitro group?The silver-mirror appearance that develops at the end of the reaction serves as a marker for the Nitro group. Tollen's reagent is used to heat hydroxylamine even more. Heating causes hydroxylamine to oxidize into the appropriate nitroso compound and reduce Tollen's reagent to metallic silver.
A nitro functional group has what name?The prefix "nitro" is added to the name of the matching alkane or arene to create the name of any nitro compound.
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question:-
What type of group is nitro group?
Determine the energy released per kilogram of fuel used.
Given MeV per reaction, calculate energy in joules per kilogram of reactants.
Consider 1 mole of tritium plus 1 mole of deuterium to be a mole of “reactions” (total molar mass = 5 grams).
Answers
1. Calculate the energy released per reaction using Einstein's famous equation E = mc^2, where E is the energy released, m is the mass defect of the reactants, and c is the speed of light. The mass defect is the difference between the mass of the reactants and the mass of the products.
2. Convert the energy released per reaction from MeV (mega-electron volts) to joules using the conversion factor 1 MeV = 1.602 × 10^-13 joules.
3. Calculate the number of reactions per kilogram of reactants. Since 1 mole of tritium plus 1 mole of deuterium is a mole of "reactions," and the total molar mass of the reactants is 5 grams, we can calculate the number of moles of reactants per kilogram.
4. Multiply the energy released per reaction by the number of reactions per kilogram of reactants to get the energy released per kilogram of fuel used.
Here's the formula:
Energy released per kilogram of fuel used = (Energy released per reaction x Conversion factor x Reactions per kilogram of reactants) / 1000
Why is there no isotactic or syndiotactic form ofpolyethylene?
Answers
Answer: There is no isotactic or syndiotactic form of polyethylene.
Explanation: Polyethylene is a type of polymer that is made up of repeating units of ethylene monomers. The polymer chains in polyethylene are arranged randomly, without any specific stereochemistry, which means that there is no isotactic or syndiotactic arrangement of the polymer chains. The lack of stereochemistry in polyethylene results in a material that is amorphous and has low crystallinity, which gives it unique mechanical and physical properties that make it useful for a wide range of applications.
1. Compare the volumes of 0.1 mol/L sodium hydroxide solution required to neutralize equalvolumes of 0.1 mol/L solutions ofa. nitric acid, HNO3, =b. phosphoric acid, H₃PO₄. =DoubleTripleHalfSame
Answers
The balanced neutralization reaction between NaOH and HNO₃ is:
NaOH + HNO₃ ----> NaNO₃ + H₂O
The balanced neutralization reaction between NaOH and H₃PO₄ is:
3 NaOH + H₃PO₄ -----> Na₃PO₄ + 3 H₂O
If we compare the coefficients we see that we need the triple volume of the NaOH solution to neutralize the Phosphoric Acid solution.
Answer: Triple.
To test for a ammonia, which of these should be held over the test tube Group of answer choices dry red litmus paper dry blue litmus paper moist red litmus paper moist blue litmus paper
Answers
In order to test for ammonia, a moist red litmus paper should be held over the test tube containing the ammonia. Option 3.
Testing for ammoniaAmmonia is a substance that is alkaline in nature. All alkaline substances are able to turn red litmus paper to blue. This is in opposition to acidic substances that turn blue litmus paper to red.
Thus, the first test that can be used to determine if a substance is ammonia would be to hold a moist red litmus paper over the test tube containing the suspected substance.
Since ammonia is gas at room temperature, the substance suspected to be ammonia will diffuse from the test tube to turn the moist red litmus paper to blue.
Other methods to test for ammonia include passing a test tube containing hydrochloric acid over the test tube containing the substance. A white fume of ammonium chloride will confirm the presence of ammonia.
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pls help i will mark as brainliest
Answers
Answer:
ano po ito?? isa po ba itong story
the term rhizospher is given by
Answers
Answer:
the interface between soil and plant root
Two objects in the solar system are described below.
Object 1: This object revolves around the sun and is made of ice, gas, rock and dust
Object 2: This object revolves around a planet and is made of rock
Which of the following is correct about the two objects?
(A) Object 1 is a comet, and Object 2 is a moon.
(B) Object 1 is a moon, and Object 2 is a star.
(C) Object 1 is an asteroid, and Object 2 is a planet.
(D) Object 1 is a star, and Object 2 is a comet.
Answers
Answer:
The correct answer is (A)
Explanation:
Comet are frozen pieces made out of dust, rock, and ices. Moon has a thick rocky crust.
What is the relationship between potential and kinetic energy?*
As potential energy increases, kinetic energy increases.
O As potential energy increases, kinetic energy decreases.
As potential energy decreases, kinetic energy decreases.
O Potential and kinetic energy are two separate things and have no relationship.
Answers
Answer:
As potential energy increases, kinetic energy decreases
It's an inverse relationship
Identify the correct chemical formula. Select one: O a. K₂C₂H₂O2 0 b. K2(OH)2 O c. KCIO3 O d. 504 MATU 20 A www. wowow
Answers
Answer:
B.K2(OH)2 i think that is the answer
the freezing point of a 1 m solution of f e c l 3 is expected to be lower than check circle outline that of a 1 m solution of glucose. this is because f e c l 3 is more soluble highlight off and has fewer moles of solute highlight off compared with glucose.
Answers
The freezing point of a 1 m solution of FeCl3 is expected to be lower than that of a 1 m solution of glucose because FeCl3 is more soluble and has more moles of solute compared with glucose.
This is due to the fact that FeCl3 is an ionic compound, which dissociates into Fe3+ and 3 Cl- ions in solution. This means that there are more particles in solution, which lowers the freezing point. Glucose, on the other hand, is a covalent compound and does not dissociate into ions in solution. Therefore, there are fewer particles in solution, which results in a higher freezing point. This phenomenon is explained by the colligative property of freezing point depression, which states that the freezing point of a solution is lowered by the presence of solute particles. The more particles in solution, the lower the freezing point.
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Consider the following reaction where K. = 9.52 10 2 at 350 K.
CH,(g) + CC14(2)—2CH2Cl2(g)
A reaction mixture was found to contain 2.21*10-2 moles of CH4(E), 3.8710-2 moles of CC1,(g) and 1.06-10-2 moles of CH,C12(2), in
a 1.00 liter container
Is the reaction at equilibrium?
If not, what direction must it run in order to reach equilibrium?
The reaction quotient, Qc equals
The reaction
A. must run in the forward direction to reach equilibrium
B. must run in the reverse direction to reach equilibrium
C. is at equilibrium
Answers
Answer:
The correct answer is A :))
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment. (2)
Answers
It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.
In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.
During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.
The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.
However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.
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is na2o a element or compound
Answers
Answer:
Its a compound :PP
Explanation:
have a good day
Answer:
Compound
Explanation:
A 43.40 mg sample of an alcohol contains 15.10 mg O, 22.6 mg C, and the rest is hydrogen. What its percent composition of carbon.
? ? C
Answers
The percentage composition of carbon in the given sample will be 52 %.
The ratio of amount of each element to the sum of all individuals components present in the given compound, multiplied by 100, it is the definition of the percentage composition of the given compound. The percent composition tells about the mass of each element in a compound. To find out the percent composition, we must first know the molar mass of the element.
Given that sample of alcohol is 43.40 mg
The alcohol contains the 15.10 mg O, and 22.6 mg C, and the rest is hydrogen.
The formula to calculate percent composition is
( 22.6 / 43.40 ) ×100 = 52 %.
Therefore, the percent composition of carbon is 52 %.
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CxHy +O2 --> H2O + CO2
Question 1 options:
Decomposition
Combustion
Synthesis
Single Displacement
Look down below at the picture thank you
Answers
Single displacement because the oxygen is not balance
Water is an essential molecule to life on Earth. Which of the following is not a property of water that is critical to biological life?
1. surface tension
2. density
3. temperature
4. viscosity
Answers
The property of water that is not critical to biological life is surface tension.
What is biological life?Biological life means the life in which living organism do exist and for their survival they mainly depends on water and air.
The main critical properties that water should posses to biological life are density, temperature, cohesive force and adhesive force. Viscosity is also understand by the cohesive force because more attraction between atoms more viscous they are.
Hence option (1) is correct i.e. surface tension.
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How does evidence of chemical
reactions indicate that new substances
with different properties are formed?
Answers
Answer:
Changes in Properties Changes in properties result when new substances form. For instance, gas production, formation of a precipitate, and a color change are all possible evidence that a chemical reaction has taken place. ... Change in Color A color change can signal that a new substance has formed.
Explanation:
The chemical reaction indicate the formation of new substance by change in nature of original compound and shows chemical changes in the reaction.
What is chemical reaction?Chemical reaction is defined as process in which two or more molecules collide with the proper orientation and enough force to produce a new product.
It is also defined as a procedure in which one or more compounds, known as reactants, are changed into one or more distinct substances, known as products.
There are mainly seven types of reaction.
Synthesis reactionDecomposition reactionDisplacement reactionDouble displacement reactionCombustion reactionRedox reactionAcid-Base reactionThus, the chemical reaction indicate the formation of new substance by change in nature of original compound and shows chemical changes in the reaction.
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Which of the following is NOT true of zinc?
-Excess zinc can decrease copper absorption.
-Grains are the most reliable food sources of zinc.
-All of its functions involve it acting as a cofactor for enzymes.
-It binds to most proteins in the body.
Answers
while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.
How to solve the problem?
The statement that is NOT true of zinc is "Grains are the most reliable food sources of zinc." While grains can be a source of zinc, they are not necessarily the most reliable source.
Zinc is an essential mineral that plays important roles in many biological processes, including immune function, protein synthesis, wound healing, and DNA synthesis. It is involved in various enzymatic reactions, and acts as a cofactor for many enzymes. Zinc is also important for proper growth and development, especially during childhood and adolescence.
Excess zinc intake can lead to decreased copper absorption, as both minerals compete for absorption in the intestines. This can lead to copper deficiency, which can cause anemia neutropenia, and other health problems. Therefore, it is important to maintain a balance between zinc and copper intake.
While grains can be a source of zinc, other foods such as meat, seafood, and dairy products are also good sources. Vegetarians and vegans may need to pay particular attention to their zinc intake, as plant-based sources of zinc may be less bioavailable than -based sources. Zinc supplements can also be used to prevent or treat deficiencies, but should be used with caution as excessive intake can have negative health effects.
In summary, while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.
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Which sub atomic particle always determines the elemental identity of an atom
Answers
Answer:
The proton determines the identity of an element.
Explain in general terms the similarities and differences in the behaviors of different indicator compounds ?
Answers
Indicator compounds are substances that change color in light of changes in pH. They are utilized to decide the acidity or basicity of a solution.
Similarities:
All indicators change color in light of changes in pH, demonstrating the presence of an acidic or basic solution.
The color change of most indicators is slow, taking into consideration the constant measurement of pH over a range of values.
Most indicators have an alternate color at the pH at which they are neutral (neither acidic nor basic) and at the pH values that are either acidic or basic.
Differences:
The range of pH over which an indicator changes color can differ. A few indicators might change color over an exceptionally limited range of pH values, while others might change color over a more extensive range.
The specific colors that an indicator exhibits at different pH values can also vary. Some indicators may show several different colors over their range of pH, while others may only show two or three different colors.
The responsiveness of an indicator can likewise shift. A few indicators might display a more perceptible color change at a given pH, while others might have a less articulated change.
In conclusion, while all indicators change color because of changes in pH, the particular range of pH over which they change color, the particular colors they display, and the awareness of their color change can fluctuate between various indicator compounds.
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Based on the Law of Conservation of Mass, what mass of products form when baking soda decomposes?
NaHCO3 → Na₂CO3 + H₂O + CO₂
Give your answer to the correct number of significant figures.
(g) Sodium Chloride = [?]
Answers
Based on the Law of Conservation of Mass, the mass of products form when baking soda decomposes is 168 g/mole.
What is law of conservation of mass?The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.
From the equation of NaHCO3 → Na₂CO3 + H₂O + CO₂ , we have
Mass of baking soda = 2 x molar mass
Molar mass of NaHCO₃ = 84.007 g/mole
Mass of baking soda = 2 x 84.007 g/mole
Mass of baking soda = 168.014 g/mole= 168 g/mole
Therefore, based on the Law of Conservation of Mass, the mass of products form when baking soda decomposes is 168 g/mole.
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