Answer: hydrogen and oxygen
Explanation:
What might be a possible outcome if you left a soda in a glass bottle in the freezer for a very long time?
A.
The gases in the soda will increase in volume as the soda transitions from liquid to solid. This will cause the bottle to explode.
B.
The gases in the soda will decrease in volume as the soda transitions from liquid to solid. This will cause the bottle to implode or collapse.
C.
H2O will decrease in volume when transitioning from a liquid to solid state. This will cause the bottle to implode or collapse.
D.
H2O will increase in volume when transitioning from a liquid to solid state. This will cause the bottle to explode.
A the soda will increase in volume
Convert the following temperature units (Hint: K = °C +273)
A) 50°C = __________ K
B) 288 K = __________°C
Answer: a- 323 b- 15
Explanation:
A 5.00 L flask contains 7.94 g of a gas at STP. What is the molar mass of the gas?
Answer: 35.6 g/mol
Explanation: I guessed and got it correct
The molar volume of any gas behaving ideally at STP is 22.414 L. The molar mass of the gas at STP is 35.59 g.
What is molar mass?The molar mass of a substance is defined as the mass of one mole of molecules. In other words one gram molecular mass of a substance is same to its molar mass in g mol⁻¹.
The molar mass of a substance can be obtained by adding the atomic masses of each elements. At 0°C and 1 atm, 1 mole of any gas behaving ideally occupies a volume of 22.414 L.
Here 5.00 L of the gas at STP has a mass of 7.94. Then the molar mass of 22.414 liters of the gas can be calculated as:
7.94 × 22.414/5.00 = 35.59 g.
Thus the molar mass of the gas is 35.59 g.
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Calculate the approximate initial boiling point (in oC) of a solution of 285 g of
magnesium chloride in 2.0 kg of water. The kb of water is (0.52°C/m)
Answer:
do u take links bcs I can give u one with the answer?
The approximate initial boiling point of Magnesium chloride solution has been 102.33 degree Celsius.
The pure water has boiling point 100 degree Celsius. With the addition of the solvent, the boiling point has been increased. The change in the boiling point ([tex]\Delta T_b[/tex]) has been given as:
[tex]\Delta T_b=i.K_b.b[/tex]
Where, i has been the van't Hoff factor
[tex]K_b[/tex] has been the ebullioscopic constant
b has been the molality of the sample
The dissolution of magnesium chloride in water has been given as:
[tex]\rm MgCl_2\;(aq)\;\rightarrow\;Mg^2^+\;+\;2\;Cl^-[/tex]
The i has been the amount of molecules that has been formed by the dissociation of 1 molecule. The dissociation of Magnesium chloride has been resulted in the 1 Mg and 2 Cl. Thus, the i for Magnesium chloride has been 3.
The molality (m) of the solution has been given as:
[tex]m = \dfrac{m_s_o_l_u_t_e}{mwt}\;\times\;\dfrac{1000}{m_s_o_l_v_e_n_t}[/tex]
Where, [tex]m_s_o_l_u_t_e=285\;\text {g}\\m_s_o_l_v_e_n_t=2\;\text{kg}\\mwt=95.211\;\text{g/mol}[/tex]
Substituting the values, molality of the Magnesium chloride solution (b) can be given as:
[tex]b=\dfrac{285}{95.211}\;\times\;\dfrac{1}{2}\;\text{m}\\b=1.49\;\text{m}[/tex]
The molality of the solution has been 1.49 m.
Substituting the values for change in temperature:
[tex]\Delta T_b=3\;\times\;0.52\;\times\;1.49\;^\circ \text C\\\Delta T_b=2.33\;^\circ \text C[/tex]
The rise in boiling temperature with the addition of 285 g of Magnesium chloride has been 2.33 [tex]\rm ^\circ C[/tex]. Since, the initial temperature for pure solvent has been 100 degree Celsius.
The initial temperature of Magnesium chloride solution has been the sum of two. Thus:
[tex]\text {Initial temperature}=100^\circ \text C\;+\;2.33\;^\circ \text C\\\rm Initial\;temperature=102.33\;^\circ C[/tex]
The initial temperature of magnesium chloride solution has been 102.33 degree Celsius.
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which substances corrode copper?
whoever can help me will get the brainliest! Please
Answer:
Food chain, in ecology, the sequence of transfers of matter and energy in the form of food from organism to organism. Food chains intertwine locally into a food web because most organisms consume more than one type of animal or plant. ... In a predator chain, a plant-eating animal is eaten by a flesh-eating animal.
Explanation:
12) Balance the following chemical equation:
Zn +
H3PO4
Zn3(PO4)2 +
H2
Answer:
Sorry I am not very good at chemistry.
Explanation:
What rule/principle states that electrons in the same sublevel (p, d, or f) are placed in individual orbitals, before they are paired up, to increase atomic stability?
Aufbau principle
Hund’s rule
Pauli exclusion principle
Answer:
Hunds Rule
Explanation:
The principle states that electrons in the same sublevel (p, d, or f) are placed in individual orbitals, before they are paired up, to increase atomic stability is Aufbau principle, therefore option (a) is correct.
What is Aufbau principle ?
Aufbau principle states that electrons are filled into atomic orbitals in the increasing order of orbital energy level.
According to the Aufbau principle, the available atomic orbitals with the lowest energy levels are occupied before those with higher energy levels.
The rule/principle states that electrons in the same sublevel (p, d, or f) are placed in individual orbitals, before they are paired up, to increase atomic stability is Aufbau principle, therefore option (a) is correct.
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Suppose a fox population exists in an ecosystem. Some of the foxes maintain a heavy coat year-round, while others shed their heavy coat in the summer. Summers in this ecosystem
are becoming steadily hotter because of global warming. Which members of the species will most likely be able to adapt to the changing temperatures?
subject science
Answer:
The fox who shed their heavy coat in the summer.
Explanation:
If a fox has the ability to shed its coat in the summer, it will have no difficulties adapting to new temperatures even during winter. However, the heavy-coated one will.
what is the molecular shape of N2O2?
Answer:
If you're just looking at the Lewis Structure from the perspective of the octet rule, it does appear that the structure is correct. Dinitrogen always has a lone pair of electrons which could conceivably be used for dative bonding as you suggest. So from that perspective there appears to be nothing wrong at all - other than that it doesn't exist in nature in this way.
Explanation:
What is the temperature range for our planet? Why is this important?
Answer:
are temperature range for are planet is -129 ⁰F (-18⁰C) that's the minimum.
+136⁰F (+58⁰C) this is the maximum surface temperature
Explanation:
"the planet is not too close or too far away from the sun, earth's atmosphere also plays a vital role is regulating the temperature by providing a blanket of gases that not only protects us from excessive heating and harmful radiation from the sun, but also traps heat rising from earth's interior core, keeping us warm"- Space.com
moles are in 4.3 * 10^22 molecules of H3PO4
Answer:
The answer is 0.073
Explanation:
Final step: 0.73 x 10^-1
Can someone help me? It needs to have a diagram that has arrows.
Answer: The enthalpy change for formation of butane is -125 kJ/mol
Explanation:
The balanced chemical reaction is,
[tex]C_4H_{10}(g)+\frac{13}{2}O_2(g)\rightarrow 4CO_2(g)+5H_2O(l)[/tex]
The expression for enthalpy change is,
[tex]\Delta H=[n\times H_f{products}]-[n\times H_f{reactants}][/tex]
Putting the values we get :
[tex]\Delta H=[4\times H_f_{CO_2}+5\times H_f_{H_2O}]-[1\times H_f_{C_4H_{10}}+\frac{13}{2}\times H_f_{O_2}][/tex]
[tex]-2877=[(4\times -393)+(5\times -286)]-[1\times H_f_{C_4H_{10}}+\frac{13}{2}\times 0][/tex]
[tex]H_f_{C_4H_{10}=-125kJ/mol[/tex]
Thus enthalpy change for formation of butane is -125 kJ/mol
Convection currents in Earth's core transfer heat and material to the surface.
True or False?
Answer: False
Explanation: The plate tectonics move due to convection currents of the mantle; the cooler upper mantle descends while the hotter lower mantles ascend. The heat that drives these convection currents emanated from the core of the earth (not the sun).
Explain why it is necessary to use a mixture, alumina and cryolite, rather than just
alumina
Explanation:
The mixture of cryolite and aluminium oxide has a lower melting point than pure aluminium oxide. This means a lower amount of energy is required to establish effective conditions for electrolysis and thus makes it more cost effective.
In your opinion,what will happen to a person who has sustained injury in the spinal cord?
Answer: I think they get will paralysed and some of the impulses may not be able to get through.
Which of following is true of liquids?
Group of answer choices
The particles move at a high rate of speed
The particles have a medium amount of kinetic energy and slide past one another.
The particles vibrate in place.
The particles have a fixed volume and shape
Answer:
The particles have a medium amount of kinetic energy and slide past one another
Explanation:
If particles move at a high rate of speed its gas, and if they vibrate in place and they have a fixed volume and shape its probably a solid. So a medium amount of kinetic enery is correct.
At which position on the diagram would an apple have the greatest potential energy?
Answer:
Position 1 because it is the highest from the ground.
Hope this helps!
Which of the following is a product in the reaction described by the word equation below?
iron + copper(II) sulfate ----------> iron(II) sulfate +copper
Answer:
Please answer my question
You have 54.32 grams of PbCl4. How many moles of PbCl4 do you have?
If you show the work that would be great!
What is the mass of propane, C3H8, in a 27.5 L container of gas at STP?
Answer:
54 g
Explanation:
STP means 22.4L/mol
27.5/22.4=1.23(mol)
1.23 mol of C3H8=1.23*44= 54 g
if the velocity of an object is doubled, its kinetic energy is multiplied by
Select odd one out.
I) O
II) Na
III) Cu
IV) Ag
Explanation:
0 is the odd one...............
and rest are metals and they lose electron and 0 gain electron and is non metal
i’m not sure if this is even the right subject lol but anyways
List 4 interesting facts about the element Cobalt
Answer:
Cobalt was the first metal to be discovered since prehistoric times and the first metal with a recorded discoverer.
Cobalt-60 is used to create gamma rays which are used to treat cancer and to sterilize medical supplies.
Cobalt is one of only three naturally occurring magnetic metals, making it very useful for the uniquely calibrated magnets found in generators and hard drives. ...
Cobalt has been utilized by man for at least the last 2,600 years, providing blue pigments for glassware and ceramics.
Explanation:
Answer:
- Doesn’t exist naturally on earth.
- Isolated in 18th century
- we use cobalt for magnets
- isn’t rare
Black hair (B) is dominant to brown hair (b). Cross a black rabbit and a brown hair. The black rabbit had a brown haired mother.
What is the punnet square for this and the genotype and phenotype for this.
Answer:
Genotypic ratio = 1 Bb: 1 bb
Phenotypic ratio = 1 black rabbit : 1 brown rabbit
Explanation:
This question involves a gene coding for hair color in rabbits. The allele for Black hair (B) is dominant to the allele for brown hair (b).
According to this question, a black rabbit whose mother is brown haired (bb) is crossed with a brown hair rabbit. This means that the black rabbit will have a genotype 'Bb' while the brown rabbit will have a genotype 'bb'. Each parent will produce the following gametes:
Bb - B and b
bb - b and b
Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:
Bb, Bb, bb and bb
This means that the;
Genotypic ratio = 1 Bb: 1 bb
Phenotypic ratio = 1 black rabbit : 1 brown rabbit
7. Where do amino acids reside ?
Answer:
Explanation:
Polar side chains tend to be present on the surface of a protein where they can interact with the aqueous environment found in cells. On the other hand, non-polar amino acids tend to reside within the center of the protein where they can interact with similar non-polar neighbors.
Oday, you will observe drops of liquid water and compare them to drops of liquid isopropanol, noting whether either liquid evaporates. Given that the energy transferred in from the air will be the same for both liquids, make a prediction about whether both drops or only one drop will evaporate within five minutes. Explain your prediction below.
Answer:
Liquid isopropanol.
Explanation:
Liquid isopropanol will evaporate earlier than water because the boiling point of isopropanol is less than water. That liquid which have high boiling point require more heat energy for change into vapor state as compared to those liquids that has low boiling point. The isopropanol has boiling point i.e. 82.5 °C while on the other hand, water has boiling point i.e. 100 °C so we can say that isopropanol will evaporate first.
The liquid that will be the first to evaporate within 5 minutes is; Liquid Isopropanol
We have the 2 liquids as;
Liquid Isopropanol
Liquid water
Now, since we are dealing with the one that will evaporate within five minutes, we need to know their boiling points.
From online research;
Boiling point of liquid isopropanol is 82.5°C
Boiling point of liquid water is 100°C
Now, we are told that the same energy is transferred for both liquids. However, boiling point of the liquid with the lower boiling point will be achieved first and as a result will evaporate first since the next stage after boiling point is evaporation of steam.
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3. When the water level is higher outside the flask than inside, is the gas pressure inside the flask higher, lower or the same as atmospheric pressure? (Take your time to think about this. Perhaps think of what it feels like to be 10 feet under water.)
Answer:
The gas pressure inside the flask is higher than outside the flask ornthe atmospheric pressure.
Explanation:
Given a U-tube manometer with water in between each arm of U-tube. One end is open to the atmosphere while one end is sealed to a flask filled with a gas. The water in the open end of the tube is experiencing a pressure equal to the atmospheric pressure whereas the water at the end sealed of to the flask is experiencing pressure due to the gas in the flask.
If the water level in both arms of the tube are equal, then the pressure due to the gas is equal to atmospheric pressure.
If the water level in the arm sealed to the gas is higher than that of the open end, The gas pressure is less than the atmospheric pressure.
If the water level in the arm sealed to the flask is lower than the open end, the pressure due to the gas is higher than atmospheric pressure.
From the question, when the water level is higher outside the flask than inside, then the gas pressure inside the flask is higher than the atmospheric pressure.
Lodestone is magnetic. How might you identify weather a mineral sample might be lodestone
A. By examining how it bends
B. By determining if it contracts electricity
C. By determining if it glows under ultraviolet light
D. By determining if it attracts metal objects
Answer: D
Explanation:
Which sets of elements have similar chemical and physical properties?
1. Mg and Ra 2. Al and P 3. Be and Ba 4. Na and Cl
1 & 2 ,
2 & 3
1 & 3
2 & 4
Answer:
1 & 3
Explanation:
Elements have similar chemical and physical properties if and only if they belong to the same group of elements in the periodic table.
A group of elements in the periodic table is a family of elements, the elements in the in the same group have the same number of valence electrons in their outermost shell, share similar chemical reactivity (with slight variation within the group) and similar physical properties (with slight variation within the group).
Magnesium, radium, beryllium and barium all belong to group 2 hence they have similar chemical and physical properties.