Answer:
1024.24 K
Explanation:
From the question,
Applying the general gas eqaution
PV/T = P'V'/T'.................... Equation 1
Where P, V, and T = Initial pressure, initial volume and initial Temperature of the gas respectively, P', V' and T' = Final pressure, Final Volume and Final temperature of the gas respectively
make T' the subject of the equation
T' = P'V'T/(PV).................... Equation 2
Given: P = 1220 mmHg, V = 85 mL, P' = 836 mmHg, V' = 350 mL, T = 363 K
Substitute these value into equation 2
T' = (836×350×363)/(1220×85)
T' = 1024.24 K
It is necessary to develop alternative sources of energy because____.
scientists are uncertain of how long the resources will last.
scientists are certain of how long the resources will last.
only a select group of people have information on our resources.
scientists have estimated how long the resources will last.
Answer:
scientists are uncertain of how long the resources will last.
Explanation:
It is hard to estimate how long certain natural resources will last because they are dependent upon the rate of consumption and other factors. There are many fields of studies going into alternative energy. Since the technology needed for some of these ideas will take time to be developed, alternative sources of energy must be found before the resources we already have run out.
Answer: A. scientists are uncertain of how long the resources will last.
Explanation:
We are looking into many other types such as: Solar, Nuclear, Water, Etc.
2. Without energy there can be no
Answer:
Existence
Explanation:
Energy is required for anything to occur, without it there would be no 'causality' for things to change from one moment to the next.
Hope this helped!!!
Why are detergents bad for the environment?
Answer: They are pollutants when they encourage bacterial growth and loss of oxygen in our rivers and streams, they can be the cause of a very unhealthy ecosystem :( kinda sucks tbh
Explanation:
A bacterium called Bacillus thuringiensis contains a protein that can kill cotton ballworms and certain other kinds of caterpillars. A different bacterium called Agrobacterium tumefaciens has the ability to insert its genetic material into plants.
Scientists in the late twentieth century took a gene from Bacillus thuringiensis and inserted it into specimens of Agrobacterium tumefaciens. Genetic material from the Agrobacterium tumefaciens specimens was then inserted into cotton plants. The goal of these tests was to reduce caterpillar infestation in the cotton plants.
These tests are an example of
A.
natural selection.
B.
genetic modification.
C.
creating purebred species.
D.
meiotic cell division.
Answer:
Genetic modification
Explanation:
a desired trait from one organism is placed into that of another organism with human intervention.
how many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide
a. 3
b. 4
c. 6
d. 2
One mole of NaOH = 40g NaOH
One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in water
One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in wateraccording to the given data,
One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in wateraccording to the given data,we have 6 moles of NaOH so we need 6 litres of Water olto prepare 1M Solution
Which of the selections completes the following nuclear reaction?
Answer:
najsbsbsmnshzhskwjzhhsbsbsbsbzbbsnzn
hsnznzkskzjbxbs
gasjhsjsbabakjahajakqjahsvhwksbxbwhsjkxjsjshshshshshhshshshsjshxhsbsbsbsbhshshdbdbbdbdbdhbsjajshshshsjsksksjsjsjjsbsksshshssgsgsbsbvsgsbsjsksjsjxjxjksksjgshkajahsgshsjsjabavsvshwhsggehsjsjsjdnsjajs
Answer:
uhh the Neutron i guess lol you didn't give any choices or explanation
Explanation:
What is the relationship between density and speed of light?
Answer:
The more optically dense that a material is, the slower that a wave will move through the material. ... So as the index of refraction value increases, the optical density increases, and the speed of light in that material decreases.
47.9 ml hrdrogen is collected at 26° Celsius and 718 torr. Find the volume occupied at STP
Answer:
The volume at STP is 41.3mL
Explanation:
To solve this question we must find the volume using the combined gas law. The equation is:
P1V1 / T1 = P2V2 / T2
Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of the gas.
P1 = 718torr
V1 = 47.9mL
T1 = 26°C + 273.15 = 299.15K
P2 = 760torr at STP
V2 = ?
T2 = 273.15K at STP
Replacing:
718torr*47.9mL / 299.15K = 760torr*V2 / 273.15K
41.3mL = V2
The volume at STP is 41.3mL
is part of the digestive and the respiratory system because food and air can travel 3. The through it.
OLungs
O Heart
O Pharynx
O Diaphragm
Help me!!!
Answer:
pharynx
Explanation:
URGENT PLEASEEEE HELP
A functional group is a specific arrangement of atoms in an organic compound that is capable of characteristic reactions
Is this true of false
PLEASE HELPP NO LINKSS
Answer:
True
Explanation:
An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?
A single proton has the charge of +1.
A neutron is neutral and has a charge of 0
A single electron has the charge of -1
Since the nucleus contains both protons and neutrons, with neutrons have charge of 0 and protons with +1, the total charge of the nucleus would be 25 * 1 which is +25.
Answer:
25+
Explanation:
25+ = the number of protons in the nucleus
La siguiente ilustración muestra un purificador de agua que utiliza energía solar.
———————————————
Cuál de las siguientes especificaciones es una limitación del sueño del purificador de agua solar?
Answer:
Requiere que el agua pase por membranas de filtración.
Explanation:
Un purificador de agua que utiliza energía solar es un dispositivo innovador y tecnológico que funciona como una estación de saneamiento básico con capacidad para purificar el agua y eliminar el 99% de virus y bacterias.
El sistema funciona de la siguiente manera: cuenta con bomba, panel solar, cargador y mangueras. La bomba mueve el agua a través del filtro utilizando la energía de la batería que se carga con la energía de la luz solar. Incluso en días con poca exposición al sol, el sistema es capaz de utilizar la energía acumulada de la batería y purificar 1 litro de agua en 1 minuto.
Se trata de una tecnología simple e innovadora que puede ser de gran ayuda en el saneamiento básico de lugares que no contienen agua potable, debido a la facilidad y portabilidad del sistema.
For the reaction 2Na + 2H20 - 2NaOH + H2, what type of reaction is taking place?
O synthesis
O decomposition
O single replacement
O double replacement
Cheryl kept a potted plant near a window. After two days, she observed that the plant had drooped as shown.
What would most likely help the plant to become healthy
PLEASE HELP!!!!!!!!!!!!!!!!!!! You will recieve 25 points if you help me.
A. watering the plant
B. adding more soil to the pot
C. replanting the plant in a larger pot
D. providing more sunlight to the plant
what is the heating curve on the horizontal line
Answer:
The plateaus or horizontal lines on the graph represent the transition between states of the sample. The first plateau represents the melting (or transition from solid to liquid) and the second plateau represents boiling (or transition from liquid to gas).
Explanation:
What volume of water is required to prepare 1.50M solution with 2.55 moles of NaCl?
Answer:
?
Explanation:
Molarity is the molar concentration of the moles in a solution. The volume of water required for preparing 1.50 M NaCl solution is 1.7 L.
What is volume?Volume is the number of moles of solute present in a molar concentration of a solution.
Molar concentration is given as,
[tex]\rm Molarity (M) = \dfrac{\text{moles of solute}}{\text{litres of solution}}[/tex]
Given,
Molarity of sodium chloride = 1.50 M
Number of moles of sodium chloride = 2.55 mol
Substituting values in the above equation the volume is calculated as:
[tex]\begin{aligned}\rm Volume &=\rm \dfrac{moles}{molarity}\\\\&= \dfrac{2.55}{1.50}\\\\&= 1.7 \;\rm L\end{aligned}[/tex]
Therefore, 1.7 L of water is required.
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Which material would take the longest to cool off once heated?
Liquid water
Lead
Ice
Copper
Answer:
Liquid water
Question #1: Identify the type of Mutation below
Original
TTCGATA
TTGATA
Copy
Insertion
Substitution
Deletion
Answer:
Deletion
Explanation:
A mutation refers to a change in the DNA sequence. This means that the original sequence of bases in the DNA has been altered permanently.
There are three types of DNA mutations; base substitutions, deletions and insertions.
In the particular case of this question, the original is TTCGATA while the copy is TTGATA. If you look closely at the two, you will notice that the C has been omitted. This is an example of deletion.
An unknown gas has pressure, volume and temperature of 0.9 atm 8L and 120°C respectively. How many moles of gas are present?
Answer:
n = 0.223 mol.
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to approach this problem via the ideal gas law, which involves the pressure, moles, temperature and volume of the gas:
[tex]PV=nRT\\\\[/tex]
Thus, by solving for moles we obtain:
[tex]n=\frac{PV}{RT}[/tex]
Therefore, we plug in the given volume, temperature (in Kelvins) and pressure to obtain:
[tex]n=\frac{0.9atm*8L}{0.08206\frac{atm*L}{mol*K}*(120+273)K} \\\\n=0.223mol[/tex]
Best regards!
What best explains the reason Jeff sees a double image of the trees on the water
Answer:
Nerve or muscle damage in the eye might cause double vision. Each eye creates its own image of the environment. The brain combines the representations from each eye and perceives them as one clear picture. Damage to the muscles that move the eyes or the nerves that control eye movement can create a double image.
Explanation:
Determine the pH of a 0.015 M HNO3 solution.
Answer:
0.015 M HNO3 = 0.015 M H3O+ pH = -log(0.015) = 1.82 [OH -] = 1.0 x 10 -14/0.015 M = 6.7 x 10 13 Check: HNO3 is a strong acid, so we expect the pH to be low and the [OH ] to be small
The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Thus the pH of 0.015 M HNO3 is 1.82. pH is a unitless quantity
What is pH?pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7
The concentration of HNO₃ is 0.015 M
Dissociation of HNO3 is
HNO3 +H₂O [tex]\rightarrow[/tex] H₃O⁺+NO₃⁻
So the concentration of H₃O⁺=0.015 M
Mathematically,
pH=-log[H⁺]
Substituting the values
pH=-log[0.015 ]
= 1.82
Thus the pH of 0.015 M HNO3 is 1.82
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2Fe2O3 + C → Fe + 3CO2 You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2?
A laboratory technician drops a 0.0850 kg sample of unknown material, at a temperature of 100.0∘C, into a calorimeter. The calorimeter can, initially at 19.0∘C, is made of 0.150 kg of copper and contains 0.200 kg of water. The final temperature of the calorimeter can is 26.1∘C. Compute the specific heat capacity of the sample.
Answer:
the specific heat capacity of the sample is 1011.05 J /kg k
Explanation:
The computation of the specific heat capacity of the sample is shown below:
Given that
Q=mcΔθ
Now Heat gain by the calorimeter is
= (0.200)× (4180) × (26.1 - 19) + (0.15) × (390) ×(26.1 - 19)
=6 350.95J
Now
6350.95=(0.0850) × c ×(100-26.1)
c= 6350.95 ÷ ((0.085) × (100 - 26.1))
= 1011.05 J /kg k
Hence, the specific heat capacity of the sample is 1011.05 J /kg k
How many moles of carbon dioxide are produced from the reaction of six moles of oxygen?
Explanation:
Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced. Thus 6 moles of are produced.
Answer: 6
Explanation:
Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced. Thus 6 moles of are produced.
Convert 230 centimeters into yards
It would be 2.515 yards. This is because to convert cm into yards, you would need to divide the length value by 91.44 so in your case, it would be 230÷ 91.44 which equals 2.51531.
Hope that helps!
A student observed pond water through a field microscope. He saw several organisms moving around in the water. His teacher explained that bacteria are too small to be seen with the limited magnification of the field microscope. The unicellular organisms the student observed were most likely from the kingdom -
Answer:
Kingdom Monera.
Explanation:
The unicellular organisms the student observed were most likely from the Kingdom Monera because in this kingdom, unicellular organisms are included which are prokaryotic in nature. Monera is a Greek word means "single" is a kingdom that contains organisms that are made up of one cell and having a prokaryotic cell means having no nuclear membrane and we know that bacteria is also a unicellular organism and prokaryotic in nature.
Write a sentence or mathematical expression that relates each of the
following:
-mass to moles
-moles to mass
-moles to particles
-particles to moles
Answer:
Mass to moles: mass/molar mass=mole
Moles to mass: moles x molar mass = mass
Moles to particles:1mole = 6.022x10^23 particles
Particles to moles: 1 particle =1/(6.022x10^23) mole
Explanation:
Predict the reactivity of beryllium compared with magnesium give a reason for your answer use the periodic table
Answer:
Beryllium metal is relatively unreactive at room temperature, particularly in its massive form. Magnesium is more electropositive than the amphoteric beryllium and reacts more readily with most of the nonmetals.
Explanation:
When it comes to the ease with which a positive ion or cation of the metal can form, beryllium is less reactive than magnesium.
What is magnesium ?The chemical element magnesium has the atomic number 12 and the letter Mg as its symbol. It is a glossy, gray metal with a low melting point, high chemical reactivity, and a low density. It only naturally occurs in mixtures with other elements, just like the other alkaline earth metals, and it almost always has an oxidation state of +2.
At room temperature, beryllium metal is largely non-reactive, especially in its massive form. Magnesium interacts more quickly with the majority of nonmetals because it is more electropositive than amphoteric beryllium.
Due to the electron being removed being in the 3-level rather than the 2-level and being further away from the nucleus's attraction, the first ionization energy of magnesium is lower than that of beryllium.
Thus, When it comes to the ease with which a positive ion or cation of the metal can form, beryllium is less reactive than magnesium.
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What’s the correct answer ?
Answer:
Explanation:
i think c
A hot air balloon has a volume of 2,510,000L at a pressure of 105 kPa and 122 degrees Celcius. If the balloon increased to 2,600,000L and the temperature increased to 150 degrees Celcius, what would be the pressure of the balloon?
Answer: The new pressure of the balloon is 108 kPa
Explanation:
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 105 kPa
[tex]P_2[/tex] = final pressure of gas = ?
[tex]V_1[/tex] = initial volume of gas = 2510000 L
[tex]V_2[/tex] = final volume of gas = 2600000 L
[tex]T_1[/tex] = initial temperature of gas = [tex]122^0C=(122+273)K=395K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]150^0C=(150+273)K=423K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{105\times 2510000}{395}=\frac{P_2\times 2600000}{423}[/tex]
[tex]P_2=108kPa[/tex]
The new pressure of the balloon is 108 kPa