Answer:
I believe its an NH4^+ ion & an NO3^- ion
Explanation:
hope this helps!
How are the angles and side lengths within triangle related?
Answer:
Explanation:
if the side lengths of a triangle are equal then the angles opposite to those sides are equal . This is a case of an isosceles triangle .
And if all the sides of a triangle are equal then all the angles of a triangle will be equal . This is a case of an equilateral triangle.
What would be the advantage of using a molecular model.
Answer: Can pick it up and hold it, can rotate groups about bonds
and can look for symmetry
Explanation: A molecular model is a plastic model with interchangeable balls. Represents molecules and their processes.
The creation of mathematical models of molecular properties and behavior is molecular modelling, and their graphical depiction is molecular graphics, but these topics are closely linked and each uses techniques from the others.
CO(g)+2H2(g)⇌CH3OH(g)
• Endothermic
• Exothermic
Answer:
C
H3OH(g⇌CO(g)+2H2(g)ΔH=+90.7kJ
The sign of the given value of enthalpy is positive which means the heat is released from the system.
Hence, the reaction is an endothermic reaction.
Explanation:
what type of energy transfer occurs as a coiled spring is released
Answer:
When a spring is coiled up or a rubber band is stretched, mechanical energy is stored in it. When the spring uncoils or the rubber band snaps back, this energy is released. This stored mechanical energy is called potential energy because it has the potential to make things happen.Explanation:
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After an investigation, Kuri determines that her hypothesis was wrong. What is the best thing for Kuri to do next? propose a scientific theory that explains what went wrong write a new hypothesis and conduct new experiments to explore the matter rewrite a scientific law to better predict the observations she gathered move on to a different topic because there is no value in a wrong hypothesis.
The best thing to do if a hypothesis was found to be wrong after conducting an investigation would be to write a new hypothesis and conduct new experiments to explore the matter.
HypothesisThe formulation of hypotheses is one of the key steps in the scientific method.
Hypotheses are usually tested using experiments and are usually accepted or rejected depending on the outcome of the experiments.
If a hypothesis is rejected, it does not mean that the entire subject is abandoned. Rather, new hypotheses may be formed and experiments conducted to further explore the subject.
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Answer:
The best thing to do if a hypothesis was found to be wrong after conducting an investigation would be to write a new hypothesis and conduct new experiments to explore the matter.
Explanation:
- Would you expect the compound Ag3N to be a solid, liquid, or gas? Explain.
A particle accelerates from rest with an acceleration of 8. 0m/s2. Calculate its velocity after 150s.
The acceleration can be defined as the change in velocity with respect to time. The velocity of the particle is 1200 m/s.
What is the kinematic equation?
The movement of the particles is described with the rate of change in the position of the object with respect to time. The change in position, velocity, and acceleration is given by the Newton's kinematics equations.
The velocity of particle with respect to acceleration can be given as:
[tex]v=u+at[/tex]
Where, the initial position rest has the initial velocity, [tex]u=0\rm \;m/s[/tex]
The acceleration of the particle, [tex]a= 8. 0\;\rm m/s^2[/tex]
The time for the final velocity, [tex]t=150\;\rm sec[/tex]
Substituting the values in the equation for final velocity, v:
[tex]v= 0+ 8. 0\;\times\;150\;\rm m/s\\\textit v=1200\;m/s[/tex]
The velocity of the particle after 150 seconds is 1200 m/s.
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If you transfer energy into two substances which one would melt first
Answer:
The substance with a weaker molecular attraction
Jim's car travels 60.2 meters in 5 seconds. Tara's car travels 72 in 6 seconds. What is the speed for each car? Whose car travels fastest?
Answer:
Jim's car travels: 12.04 meters per second.
Tara's car travels 12 meters per second.
Explanation:
Tara's car travels the fastest.
A cube of sugar has the length of one side 4cm.find its volume
Answer:
64
Explanation:
since it's a cube all sides are equal
and to calculate volume you multiply the length by the hieght by the width
According to the theory of plate tectonics, where do most active volcanoes occur?.
Answer:
I think this is the right answer. I researched this. I am not sure if this is the right answer.
Most of the world's active volcanoes are located along or near the boundaries between shifting plates and are called "plate-boundary" volcanoes. The double lines indicate zones of spreading from which plates are moving apart
Explanation:
You have 1.5L of a 14M stock solution of nitric acid. You need to make 3L of a 5M solution of nitric acid.
Answer:
see explanation
Explanation:
(Molarity x Volume)concentrate = (Molarity x Volume)diluted
14M x V(concentrate) = 5M x 3L
V(concentrate) = (5M x 3L)/14M = 1.07L of concentrate needed
Mixing:
On mixing water directly into nitric acid at high concentrations the solution tends to hydrate very rapidly and release heat extensively and perhaps splash back solution onto surroundings. Thus, one should apply caution and wear safety clothing; i.e., gloves and protective eye ware while working with such systems.
With the hazards of mixing in mind, one should first add a small quantity of water solvent into the mixing vessel, perhaps 0.50L - 1.00L of the solvent water. Then slowly add the needed amount (in this case 1.07L of the 14M nitric acid solution) of nitric acid into the solvent water. Then dilute further with solvent water up to but not to exceed the 3L reference mark of the mixing container. Mix and carefully transfer the new solution (3L of 5M HNO₃) into an appropriate storage container and seal.
Note: As with any chemical of interest, one should review the MSDS for the reagent being used, noting hazards and proper laboratory handling in order to avoid accidents and/or injury that may occur as a result of improper use.
As a general rule, always add acid into water, NEVER water into acid. Remember A&W (acid into water) root beer.
Mrs. Kelly is making hot cocoa for her and her husband because she is the best. She pours half of the hot cocoa into her favorite glass mug, and the other half into her husbands favorite ceramic mug. She picks up both mugs and notices the ceramic mug feels much warmer than the glass mug. Why could this be happening?
A) The glass and ceramic mugs have different heat capacities.
B) The hot cocoa has different thermal energies.
C) The cocoa in the ceramic mug has less potential energy.
D) The glass mug has more kinetic energy than the ceramic mug.
Thank you to anyone who answered! Very appreciative <3
Answer:A
Explanation:
just took the quiz
You mix 2.58 grams of NaHCO3 with 49.00 grams of 1.00M HCl. The two react to form aqueous NaCl, water, and carbon dioxide. The initial temperature was 21.4°C and temperature at the end of the reaction was 17.4°C. Assume that the density of HCl is 1.00g/mL.
a. Write the balanced reaction.
b. The final temperature of the resulting solution was lower than the initial temperature. How did the energy flow?
The energy was released by the solution and absorbed by the reaction.
The energy was absorbed by the solution and released by the reaction.
C. Use the equation q = nCΔT to calculate the heat (kJ) involved in the reaction.
D. Calculate the number of moles of sodium bicarbonate and hydrochloric acid used in the reaction.
This problem is providing the masses of both NaHCO3 and HCl and the initial and final temperature due to the reaction. It asks for the balanced chemical equation, the direction and quantity of heat and the consumed moles.
Calorimetry in chemical reactions.In chemistry, calorimetry in chemical reactions basically allows us to quantify the chemical heat that is involved in a chemical change due to the rearrangement of bonds when the reactants get in contact.
In such a way, one can start this problem by writing and balancing the undergoing chemical equation between NaHCO3 and HCl, according to the law of conservation of mass:
[tex]NaHCO_3 + HCl\rightarrow NaCl+H_2O+CO_2[/tex]
Which is already balanced as equal number of sodium, hydrogen, carbon and oxygen are present on both sides of the equation.
Next, since the final temperature of the resulting solution was lower than the initial temperature, one comes to the conclusion that the reaction is endothermic, as the energy was released by the solution and absorbed by the reaction.
Thereafter, given the general equation for the calculation of heat:
[tex]Q=mC\Delta T\\\\[/tex]
One can calculate the heat involved in the reaction, assuming the specific heat of the solution equals waters:
[tex]Q=-(2.58g+49.00g)*4.184\frac{J}{g\°C}(17.4-21.4)\°C \\\\Q=-863J*\frac{1kJ}{1000J}=0.863 kJ[/tex]
Which adopts the negative sign at the beginning, because of the flow of heat which make the heat of reaction the negative of that of the solution.
Finally, we use some stoichiometry to calculate the number of moles of sodium bicarbonate and hydrochloric acid used in the reaction:
[tex]2.58gNaHCO_3 *\frac{1molNaHCO_3}{84.0gNaHCO_3}=0.0478molNaHCO_3\\ \\49.00gHCl*\frac{1molHCl}{36.46gHCl}=1.344molHCl[/tex]
Hence, since they react in a 1:1 mole ratio, we can see the excess HCl in the reaction, and thereby, the correct number of moles, reacting in the chemical reaction are just 0.0478 mol of the both of them.
Summary of answers:a. [tex]NaHCO_3 + HCl\rightarrow NaCl+H_2O+CO_2[/tex]
b. The reaction is endothermic, as the energy was released by the solution and absorbed by the reaction
c. 0.863 kJ
d. 0.0478 mol
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What happens to the freezing temperature of a solvent when a
solute is dissolved into it?
a It is unaffected.
b It increases
Clt decreases.
d It either increases or decreases
Answer:it decreases
Explanation:
during photosynthesis, light energy from the Sun causes a reaction to take place. The products of photosynthesis are used in a reaction during the process of cellular respiration, which provides energy for cell processes.
Identify which reaction absorbs energy and which reaction releases energy.
Answer:
chemical reactions which proceed with the release of heat energy are called exothermic reactions
How many grams of sodium hydroxide needed to be obtained in order to get 1.7 x 1024 molecules NaOH?
Answer:
n order to get that molecule you hgave to go into atoms like the skin of of it.... I'm just trying to sound smartI
Explanation:
5. The excited players celebrated because they won the game. 6. Everyone at the birthday party ate the delicious birthday cake.
Answer:
5. The excited players celebrated because they won the game. 6. Everyone at the birthday party ate the delicious birthday cake is the question
Explanation:
Bile salts play a crucial role in gastrointestinal homeostasis and digestion. Which phrase is the BEST description of the gastrointestinal function of bile salts?
Answer:
bile salts emulsify fats and break them down into smaller particles which gives the enzyme lipase a greater surface area to act on during digestion of fats.
Explanation:
What is the maximum possible amount of product obtained in a chemical reaction?.
Answer:
theoretical yield
Explanation:
Theoretical yield is the maximum possible amount of product obtained in a chemical reaction .
What do you mean by the theoretical yield ?Theoretical yield is the quantity of a product obtained from the complete transformation of the limiting reactant in a chemical reaction.
Theoretical yield is commonly expressed in terms of grams or moles.
It can be calculated from-:
The balanced chemical equation, the mass and relative formula mass of the limiting reactant, and the relative formula mass of the product.
Hence ,theoretical yield is the maximum possible amount of product obtained in a chemical reaction .
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Porque a las vacunas los cientificos los llaman reactivos.
Answer:
Because scientists call vaccines reagents.
What factors determine whether a collision between two molecules will lead to a chemical reaction?.
Answer:
the concentration of reactants, temperature, and shape of the molecules.
Explanation:
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The energy of the collision must be higher than the energy of the reaction. The appropriate orientation for the collision must be used. The frequency of the collision must be higher than the frequency of the reaction. The reactants must run into each other.
What is collision ?
According to the collision theory, for a chemical reaction to take place, the reacting particles must come into contact with one another. The frequency of collisions affects the reaction's rate. According to the idea, responding particles frequently encounter without reacting.
The type of the reactants, concentration, surface area, temperature, and catalysts are some of these variables. Because they all increase the quantity or energy of collisions, these factors all increase reaction rate.
The frequency of collisions and the number of effective collisions over time are influenced by temperature, gaseous reactant pressure, and reactant concentration, claims the collision hypothesis.
The reacting elements must collide, and they must do so with the appropriate orientation and sufficient energy.
Thus, The frequency of the collision must be higher than the frequency of the reaction.
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ANSWER THE FOLLOWING QUESTIONS
Explain what is a solar eclipse and why they are so rare IN YOUR OWN WORDS
Explain what is a lunar eclipse and why the moon turns red, and why it's more common IN YOUR OWN WORDS
Answer:
This is true: Lunar eclipses happen more often. I think it's just a question of how big the shadows are: There is a lunar eclipse when the Earth blocks the Moon's light from the Sun. 7000 km away from the Moon, the Earth's shadow is about two lunar diameters wide. Much wider than a pancake. The reason that the moon turns red, is due to Earth's atmosphere. It bends red rays of sunlight into our planet's shadow and scatters out blue rays of light.
When the Moon casts a shadow on the Earth, it is called a solar eclipse. The Moon is a lot smaller now, and its shadow is also a lot smaller than it was before. Around 200 or 300 km across is how big the Moon's shadow is when it's far from the Earth.
Fun Facts:
- The 21st century has 224 solar eclipses and 230 lunar eclipses (all varieties of each combined)
For which example would carbon-14 dating be appropriate for dating?.
Answer:
"6,000-year-old seeds from an ancient culture" is one example among the following examples given in the question that carbon-14 dating would be appropriate for dating.
Explanation:
Thought you meant by something els sorry :)
Jellyfish are only found in the deep ocean?
True or False
1) How many grams of lithium, Li, contain 4.567 x 10^23 atoms?
2)What is the average mass (in grams) of one calcium, Ca, atom?
b) What is the average mass (in grams) of one mole of Ca atoms?
5.31 g of lithium contains 4.567 x 10^23 atoms.
The average mass (in grams) of one calcium, Ca, atom is 6.64 * 10^-23 g.
The average mass (in grams) of one mole of Ca atoms is 40.0 g.
What is the mass in grams of 4.567 x 10^23 atoms of lithium?The molar mass of lithium is 7.0 g
One mole of lithium atom contains 6.02 * 10^23 atoms.
6.02 * 10^23 atoms of lithium weighs 7.0 g
4.567 x 10^23 atoms of lithium will weigh 4.567 x 10^23 * 7.0 g/6.02 * 10^23 = 5.31 g
Therefore, 5.31 g of lithium contains 4.567 x 10^23 atoms.
What is the average mass (in grams) of one calcium, Ca, atom?
6.02 * 10^23 atoms of calcium weigh 40.0 g
1 atom will weigh 1 * 40.0 g/6.02 * 10^23 = 6.64 * 10^-23 g
Therefore, the average mass (in grams) of one calcium, Ca, atom is 6.64 * 10^-23 g.
What is the average mass (in grams) of one mole of Ca atoms?The molar mass of calcium is 40.0 g
Therefore, the average mass (in grams) of one mole of Ca atoms is 40.0 g.
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What can be said about an exothermic reaction with a negative entropy change?.
What must occur before a newly made polypeptide is secreted from a cell?.
Answer: Your answer is Its signal sequence must target it to the ER, after which it goes to the Golgi.
Hope this helps!
Use the chemical equation and the bond diagram to answer the question.
2H2 + O2 → 2H2O
2H–H + O=O → 2H–O–H
The energy of the H–H bond is 432 kJ/mol. The energy of the O=O bond is 498 kJ/mol. The energy of the O–H bond is 467 kJ/mol.
Which bond is the weakest?
(1 point)
O–H
H–H
O–O
O=O
Answer:
it should be 0-0
Explanation:
What is the relationship between absorbance and transmittance of a sample in a spectrophotometer? Plz help!!
Answer:
thanks for the pointthanks for the pointthanks for the point
Explanation:
thanks for the pointthanks for the pointthanks for the pointthanks for the pointthanks for the pointthanks for the pointthanks for the pointthanks for the pointthanks for the pointthanks for the póînt pa rin ang worksheets weeks ago by January