Answer: Electric energy
Explanation: Electrical energy is stored between plates in electric field
which of the following systems of equilibrium is not affected?
Answer:
The first one
Explanation:
Both the products and reactants in the first equation have the same number of moles and will not be affected by a change in volume.
10. What mass of glucose, CH,208 must be dissolved in 150.0 g of water so that the mole fraction of glucose is
0.125?
Answer:
[tex]m_G=214.02g[/tex]
Explanation:
Hello there!
In this case, since the mole fraction of glucose is calculated by dividing the moles of glucose by the addition of the moles of glucose and water, we first need to calculate the moles water and then solve for those of glucose in the mole fraction:
[tex]n_w=\frac{150.0g}{18.02g/mol}=8.32mol\\\\x_G=\frac{n_G}{n_G+n_w} \\\\n_G=\frac{x_Gn_W}{1-x_G} \\\\n_G=\frac{0.125*8.324}{1-0.125} \\\\n_G=1.189mol[/tex]
And finally, we multiply by the molar mass of glucose to obtain:
[tex]m_G=1.189mol*180g/mol\\\\m_G=214.02g[/tex]
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How could renewable energy sources be used to heat and cool a house?
The average weather conditions over a long period of time is known as
Answer: it’s climate
Explanation:
Which molecule has weakest bond?
Answer:
ionic bonds are the weakest bonds
Explanation:
1. Molecules are held together by:
a, ionic bonds
b. covalent bonds
c. both a and b
A: ionic bond, you know why becasue it is
Which of the following is a true statement regarding living organisms? All living things- (A. Require oxygen to breath)
(B. Are capable of intelligent thought)
(C.are made up of one or more cells)
(D.have a lifespan of at least on weak?
Answer:
A or C
Explanation:
Answer:
are made up of one or more cells
Explanation:
A cell is the building block of life of any organism. Therefore, an organism simply cannot exist if it has no cells
What is the name of the process scientists use to give different names to different organisms?
astronomy
economy
identification
taxonom
Answer:
D). Taxonomy.
Explanation:
'Taxonomy' is described as the process or the science of finding, describing, classifying, and naming different organisms. It is characterized as the technique of classification of animals, micro-organisms, plants, etc. into different categories or hierarchies. It has primarily been divided into eight distinct types like kingdom, species, order, family, etc.
Astronomy is associated with the study of the physical universe while the economy is defined as the study of efficient utilization of resources and identification is the process of recognizing an object. Thus, option D is the correct answer.
What is indicated by the prop- prefix?
Answer:
The molecule has 3 carbon atoms.
Explanation:
Find the number of grams of calcium chloride needed to prepare 500.0ml of a 4.0m solution
Answer:
222 g
Explanation:
First we convert 500.0 mL to L:
500.0 mL / 1000 = 0.500 LThen we use the definition of molarity to calculate how many calcium chloride moles are required:
Molarity = moles / litersMolarity * liters = moles4.0 M * 0.500 L = 2.00 molNow we convert 2.00 moles of calcium chloride into grams, using its molar mass:
2.00 mol * 111 g/mol = 222 gexplain briefly the function of friction ridges on our palm and finger.
What is one element that is not found in the human body, air, or the universe ?
Explanation:
For the moment we have analyzed the physical point of view. For many, the most common way to analyze your body is through the chemical elements.
This increases the number of building blocks to more than four particles, but considering that the number of atoms in a 70 kilogram body is 7,000 quadrillion (you write a 7 followed by 27 zeros), it is still quite simple that we can count the 99.95% of your body weight with only seven elements.
The provocative alternative theories to the Big Bang that state that the universe has no limits
You may have heard that most of our body is water. It may seem unlikely given how solid our bodies feel, but most of you are made of cells filled with water.
There is enough structure that you are unlikely to slide down the drain, but you do have a lot of water. About 60 percent of your body is water, even your bones are roughly 30% water.
Two skeletons sitting on the beach.
IMAGE SOURCE, GETTY IMAGES
Caption,
The bones have 30% water in their composition.
Knowing that water is made up of hydrogen and oxygen (H2O), it seems clear to point out that the elements most present in the body are hydrogen and oxygen.
But there is also much of the most versatile of atoms, carbon. All life we know incorporates water and is based on carbon structures.
Since carbon atoms weigh 12 times more than hydrogen atoms, carbon ranks second by weight behind oxygen.
The thing would be like this: we have 65% oxygen, 18% carbon and 10.2% hydrogen.
If we add a small amount of nitrogen (3.1%), a pinch of calcium for those bones (1.6%), 1.2% of phosphorus, 0.25% of potassium and sulfur and smaller percentages of sodium, magnesium and chlorine, we already reached 99.95
Plzzzzzzzzzzzz help!!!!!!
i believe that is false
A mixture of 0.197 mol carbon dioxide and 0.00278 mol water vapor is held at 30.0 C and 2.50 atm. What is the partial pressure of each gas?
The partial pressure of each gas is the product of its mole fraction and total pressure. The partial pressure of carbon dioxide is 2.46 atm and the partial pressure of water vapor is 0.034.
What is Dalton's law of partial pressures ?Dalton's law of partial pressure states that the partial pressure of the component gases in a mixture is the product of its mole fraction and the total pressure.
Given that, number of moles of carbon dioxide = 0.197 moles.
number of moles of water vapor =0.00278 mole.
mole fraction of carbon dioxide = 0.197 / (0.197 + 0.00278) = 0.98
Total pressure = 2.50 atm
then partial pressure of carbon dioxide = 0.98 × 2.50 = 2.46 atm
Mole fraction of water vapor = 0.00278 / (0.197 + 0.00278) = 0.0139
partial pressure of water vapor = 0.0139 × 2.50 = 0.034 atm.
Therefore, the partial pressure of carbon dioxide and water vapor are 2.46 and 0.034 atm respectively.
To find more on partial pressure, refer here:
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NaOH dissociation equation
Answer:
This can be represented by the chemical equation: NaOH H2O→ OH- + Na.
Aluminum hydroxide reacts with Iron Il nitrate to produce Iron II hydroxide
and aluminum nitrate. If 600 grams of Iron Il nitrate reacts, how many grams of
aluminum nitrate are produced?
Answer:
212.996238 grams
Explanation:
i hope it helps
What must be true about the matter at the start of a fire versus the end?
Explanation:
Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
Which of the following is an organic moleclue ?
Answer:
water
Explanation:
Which question could be answered with qualitative data?
A: how tall is the plant
B: how do the plants flower smell
C: how many leaves are on the plant
D: how much matter makes up the plant
Answer:
B
Explanation:
Quantitative data refers to numbers while qualitative data refers to characteristics.
In completing a Fischer Esterification experiment using acetic acid and unknown alcohol catalyzed by sulfuric acid a student starts with excess acetic acid with the intention of shifting the equilibrium towards formation of product. Identify the law used to predict this effect.
Answer:
The equilibrium law
Explanation:
According to the equilibrium law , when [tex]$\text{concentration}$[/tex] of any of the reactants or the products in the reaction at an equilibrium state, is changed, then it changes the composition of equilibrium mixture in order to minimize the effect of
Acetic acid (in excess) + [tex]$\text{alcohol}$[/tex] ⇄ [tex]$\text{ester}$[/tex] + water
[tex]$\text{Fischer esterification}$[/tex] is a reaction which involves the equilibrium. So to force the reaction towards the side of [tex]$\text{ester}$[/tex], one of the reactant is taken in excess. All this can be explained easily by applying the equilibrium law.
Which of the following are elements in this equation: 2H2O2 (aq) → 2H2O (l) + O2 (g)?
Check all that apply:
A. O
B. g
C. Aq
D. H
How much heat will be absorbed by a 26.3 g piece of aluminum (specific heat = 0.930 J/g･°C) as it changes temperature from 23.0°C to 67.0°C?
Answer:
[tex]\boxed {\boxed {\sf 1076.196 \ Joules}}[/tex]
Explanation:
Since we are given the mass, specific heat, and temperature, we should use the following formula for heat energy.
[tex]q=mc\Delta T[/tex]
The mass of the aluminum is 26.3 grams. Its specific heat is 0.930 Joules per gram degree Celsius. We need to find the change in temperature.
The change in temperature is the difference between the initial temperature to the final temperature. The temperature changes from 23.0°C to 67.0°C, so the initial is 23 degrees and the final is 67 degrees. ΔT= final temperature - initial temperature ΔT= 67°C - 23°C ΔT= 44°CNow we know all the values.
m= 26.3 g c= 0.930 J/g °C ΔT= 44°CSubstitute the values into the formula.
[tex]q= (26.3 \ g}) \times (0.930 \ J/g \textdegree C) \times (44 \textdegree C)[/tex]
Multiply the first two numbers together. The units of grams cancel.
[tex]q= 24.459 \ J/ \textdegree C \times 44 \textdegree C[/tex]
Multiply again. This time, the units of degrees Celsius cancel.
[tex]q=1076.196 \ J[/tex]
1076.196 Joules of heat will be absorbed by the piece of aluminum.
Calculate the pOH of a solution that is 3.25x10^-10 M of Potassium hydroxide (KOH).
pOH =
(round to 2 decimal places)
Answer:
poH= 9.48
Explanation:
pOH= -log(concentration of a Strong Base)
since KOH is a strong base we simply
-log(3.25e-10)= 9.48
The ratio of carbon 14 to nitrogen-14 in an artifact is 13. Given that the half-
life of carbon-14 is 5730 years, how old is the artifact?
A. 17,190 years
B. 22,920 years
C. 11,460 years
D. 5730 years
From the following enthalpy changes,
2PCl3(l) → 2P(s) + 3Cl2(g) ∆H = -640 kJ
2P(s) + 5Cl2(g) → 2PCl5(s) ∆H = -886 kJ
calculate the value of ∆H for the reaction
PCl3(l) + Cl2(g) → PCl5(s) ∆H = ??
Answer:
∆H = -763kJ
Explanation:
Using Hess's law we can determine the ΔH of a reaction from the sum of similar reactions. Using the reactions:
(1) 2PCl3(l) → 2P(s) + 3Cl2(g) ∆H = -640 kJ
(2) 2P(s) + 5Cl2(g) → 2PCl5(s) ∆H = -886 kJ
The sum of (1)/2 + (2)/2 gives:
(1) / 2 = PCl3(l) → P(s) + 3/2Cl2(g) ∆H = -640 kJ/2 = -320kJ
(2) / 2 = P(s) + 5/2Cl2(g) → PCl5(s) ∆H = -886 kJ/2 = -443kJ
PCl3(l) + Cl2(g) → PCl5(s) ∆H = -320kJ - 443kJ =
∆H = -763kJ
This element has 5 neutrons and an oxidation number of +2. What element is this?
Answer:
beryllium
Explanation:
The element is Beryllium
Since the element tries to loose 2 electrons, the outer most shell must contain 2 electrons so that loosing it can satisfy its octet configuration.
We can then infer that the element has 4 electrons in its neutral state.,
Remember that,
No of electrons = Number of protons ( in a neutral atom.)
So the number of protons of this element is 4,
Recall also that
Proton number = Atomic number = 4
We can conclude that The element with atomic number of 4 is Beryllium with Electron Configuration, 1s2 2s2 and condensed form as [He]2s2.
Beryllium is also known for its exclusive +2 oxidation state in all its compounds.
See related answer here: https://brainly.com/question/3162198
(b) Suggest why passing water through the filter is an important step in the home water
filtration system
Explanation:
Water filtration is the process of removing or reducing the concentration of particulate matter, including suspended particles, parasites, bacteria, algae, viruses, and fungi, as well as other undesirable chemical and biological contaminants from contaminated water to produce safe and clean water for a specific purpose ...
Plz answer fast Name the four parts of a circuit.
Answer:
A switch
Battery or cell
Resistor
Rheostat
Appliance or load such as bulb
connecting wires.
Jockey
Inductor
Capacitor
Meter bridge
Potentiometer
Voltimeter
Ammeter
Galvanometer
I want to produce 100 moles of N2. Now how many moles of NO do I need to start with?
Answer:
120 moles of NO
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
4NH₃ + 6NO —> 5N₂ + 6H₂O
From the balanced equation above,
6 moles of NO reacted to produce 5 moles of N₂.
Finally, we shall determine the number of mole NO needed to produce 100 moles of N₂. This can be obtained as follow:
From the balanced equation above,
6 moles of NO reacted to produce 5 moles of N₂.
Therefore, Xmol of NO will react to produce 100 moles of N₂ i.e
Xmol of NO = (6 × 100)/5
Xmol of NO = 120 moles
Therefore, 120 moles of NO is needed for the reaction.
1:Which example is not a physical change?
2: Which of the following is not a clue that a chemical reaction is taking place?