Answer:
140
Explanation:
there is 140 grams in 3.5 atoms of carbon
What is the name
of the reigning
theory about the
origins of the
universe?
Answer:
please follow me
Explanation:
eyye6ww6yeyosuyoyo6owy
3. Which of the following provides the best explanation for why the water drop does not slide off the inclined plane?
90 80 70
50
40
30
10
O A The polar water molecules are absorbed by the underlying surface.
OB The polar water molecules cause the surface to become temporarily charged, causing adhesion
OC The polar water molecules exert strong cohesive forces on one another
OD. The polar water molecules are repelled by the nonpolar surface
Answer:
The polar water molecules exert strong cohesive forces on one another
Explanation:
The forces of cohesion refer to the strong attractive forces that molecules of a substance exert on each other.
This strong attractive force keeps the molecules of the water together and causes the water molecules to be pulled inside towards each other. We refer to this phenomenon as surface tension.
Hence, due to surface tension, water does not run off an inclined plane.
Please help me find the answer , thank you.
Answer:
the answeer is definitely silicon.
Why do you think it is important for plants to be able to regulate the level of water in their bodies
Answer:
Plants need to regulate the level of water in their bodies in order to be able to carry out several essential processes like photosynthesis and respiration as well as maintain cell turgidity, without which the plant will not survive in its given environment.
Explanation:
The ability of plants to regulate the amount of water in their bodies is known as water balance.
Plants need water in order to carry out many of their essential life functions such as photosynthesis, respiration, nutrition,etc. They also need water in order to order to maintain cell turgidity which serves to support the plant and keep them upright in order for them to absorb sunlight for photosynthesis. Water is also needed in cell division and growth in plants. Without water the plant would not survive, as it would not be able to carry out these essential life processes.
Water balance in plants is maintained through the process of transportation. Transpiration is the process by which water leaves the plant by evaporation through its leaves. When there is an excess of water absorbed by the plant through its root hairs, the rate of transpiration in plant increases. However, when there is little quantity of water available for the plant to use for its cellular processes, the rate of transportation reduces. The opening and closing of the stomata in the leaves of plants regulates the process of transportation.
72.3 g of ice at -15.0 o C has heat energy added to it until it becomes steam at 145 o C. Calculate the total amount of heat energy needed (in Joules) to accomplish this.
Answer:
H = 226,311.66J
Explanation:
Hello there!
In this case, according to the thermodynamic path ice takes up to steam:
1. Ice (-15°C) --> Ice (0°C) H1
2. Ice (0°C) ---> Water (0°C) H2
3. Water (0°C) --> Water (100°C) H3
4. Water (100°C) --> Steam (100°C) H4
5. Steam (100°C) --> Steam (145°C) H5
It is possible for us to infer that H1, H3 and H5 are computed by means of the mass, specific heat and change in temperature as sensible heat. On the flip side, H2 and H4 are computed as latent heat. Thus, we proceed as follows:
[tex]H1=72.3g*2.093\frac{J}{g\°C}(0+15)\°C=2269.86J\\\\H2=72.3g*334.1\frac{J}{g}=24155.43J\\\\H3=72.3g*4.184 \frac{J}{g\°C}*(100-0)\°C=30250.32J\\\\H4=72.3g*2255.83\frac{J}{g}=163096.51J\\\\H5=72.3g* 2.010 \frac{J}{g\°C}*(145-100)\°C=6539.54J[/tex]
Then, we add them up to obtain the total heat:
[tex]H=H1+H2+H3+H4+H5\\\\H=2269.86J+24155.43J+30250.32J+163096.51J+6539.54J\\\\H=226311.66J[/tex]
Best regards!
Which one is not a long-term environmental change?
Pollution
Swimming
Deforestation
Climate Change
Answer:
Swimming
Explanation:
Pollution is almost irreversible and takes forever to fix. deforestation leads to bad air quality and the erosion of the ground. climate change can melt polar caps or for instance freeze texas.
francium phosphate
+ cesium acetate
Answer:
[tex]Fe_3PO_4+3Cs(CH_3COO)\rightarrow Cs_3PO_4+3Fr(CH_3COO)[/tex]
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to illustrate the complete double displacement reaction between francium phosphate and cesium acetate as given on the question:
[tex]Fe_3PO_4+Cs(CH_3COO)\rightarrow Cs_3PO_4+Fr(CH_3COO)[/tex]
Which must the balanced due to the nonequal francium and cesium atoms:
[tex]Fe_3PO_4+3Cs(CH_3COO)\rightarrow Cs_3PO_4+3Fr(CH_3COO)[/tex]
Best regards!
Please help me out with this
Which plate is north of african plate and west of north american plate?
Please help me out
Which do you think has the greater total kinetic energy?
a. The molecules of the water in the teacup
b. The molecules of the water in the bathtub
Answer:
a The molecules of the water in the teacup
hope it helps
definition of atomic number
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons.
Answer:
its basically represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table
Explanation:
sry i its too long
hope it helps
If 21.6 g of NO and 13.8 g of O₂ are used to form NO₂, how many moles of excess reactant will be left over? 2 NO (g) + O₂ (g) → 2 NO₂ (g)
Answer: 0.071 moles of excess reactant [tex](O_2)[/tex] will be left over.
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
a) moles of [tex]NO[/tex]
[tex]\text{Number of moles}=\frac{21.6g}{30.01g/mol}=0.720moles[/tex]
b) moles of [tex]O_2[/tex]
[tex]\text{Number of moles}=\frac{13.8g}{32g/mol}=0.431moles[/tex]
[tex]2NO(g)+O_2(g)\rightarrow 2NO_2(g)[/tex]
According to stoichiometry :
2 moles of [tex]NO[/tex] require 1 mole of [tex]O_2[/tex]
Thus 0.720 moles of [tex]NO[/tex] require=[tex]\frac{1}{2}\times 0.720=0.360moles[/tex] of [tex]O_2[/tex]
Thus [tex]NO[/tex] is the limiting reagent as it limits the formation of product and [tex]O_2[/tex] is the excess regaent.
moles of [tex]O_2[/tex] left = (0.431-0.360) = 0.071 moles
1. The production of a slightly soluble solid compound in a double-
displacement reaction results in the formation of a
a. gas.
b. precipitate.
C. combustion reaction.
d. halogen.
Answer: precipitate
Explanation:
46 POINTS!!! help me with chemistry, please!
Water Sugar Lemon Juice Lemonade Percent Yield Leftover Ingredients
946.36g 196.86g 193.37g 719.84g 95% Water and Sugar
4. Try to reduce the amount of leftover ingredients by changing the amount of one, two, or all three starting ingredients. Show your stoichiometric calculations below.
5. During factory inspection, Just Lemons, Inc. discovered that a water valve to the lemonade mixing station was not functioning. Once they repair it, more water will enter the mixing station. From what you know about the limiting and excess ingredients for current lemonade production, what advice would you give engineers about the upcoming increase in water?
Answer:
are you sure it is 95%?????
Explanation:
What does the speaker in the poem mean by the phrase "my heart leaps up"?
A.
He is having a heart attack.
B.
He is exercising.
C.
He feels excited and happy.
D.
His heart continues to beat.
Answer:
C. He feels excited and happy
Explanation:
Determine the ions of ammonium, in 870.4x10-23 grams of (NH4)3PO4. Round the results to the tenths.
Answer: if your trying to say what 4x10-23 is the answer is 17
and if ur also trying to say whats 870.4x10-23 the answer is 8681 have a nice day!
Explanation:
also and what is (NH4)3PO4 if its a file code or link your not allowed to post that
Atmospheric pressure on the peak of Mt. Everest can be as low as
0.197 atm, which is why climbers need to bring oxygen tanks for the
last part of the climb. If the climbers carry 10.0 liter tanks with an
internal gas pressure of 40 atm, what will be the volume of the gas
when it is released from the tanks?
Just a curious question to the Chemists,
If you were to 'accidentally' discover something through a chemical reaction that could change the world, what would it be and what positive impact would it have on society?
Answer:
well the world would be shocked
Explanation:
and suprise
Estructura correcta de los siguientes compuestos e indique si el nombre está escrito de forma correcta; 1,4-ciclohexadieno
Answer:
En la imagen adjunta.
Explanation:
¡Hola!
En este caso, dados los lineamientos IUPAC que tenemos en cuenta para dibujar la estructura de hidrocarburos cíclicos, para el 1,4-ciclohexadieno, es posible determinar que esta estructura viene dada por hexágono que representa el ciclohexano y dos dobles enlaces en los carbonos 1 y 4 al ser un dieno. Por lo anterior, en la imagen adjunta, puede encontrar la estructura requerida.
¡Saludos!
A model is simplified version of a more complex idea or system. It useful to help us understand something we can't actually see
A) true
B) false
Answer:
I feel like the answer is A) true
Explanation:
you create a model to help your audience understand your complex idea. There have been models made to represent ideas that we cannot see.
please help
sorry if it’s a little hard to read
Explanation:
Potassium=19, metal
Nitrogen=7, nonmetal
Silver=47, metal
Iron=26, metal
Sodium=11, metal
Magnesium=12, metal
Oxygen=8, nonmetal
Copper=29, metal
Calcium=20, metal
Chlorine=17, nonmetal
The specific heat of nickel is 0.445 J/g degree Celsius. How much heat is required to heat a 168 gram piece of nickel from 15.2 degrees Celsius to 43.6 degrees Celsius?
Which of the following is NOT a compound?
Water
Ammonia
Gold
Salt
The gold is not the compound.
The information related to the compound is as follows
It is the substance that contains the same type of molecules having 2 or more elements. It includes water, ammonia, salt, methane, carbon dioxide etc.In this, the elements should be bonded together.Therefore we can say that gold is not the compound.
Learn more related to the compound here: brainly.com/question/23334479
What are the types of Asexual reproduction?
need this asap bro uyftghjkddfs
Answer:
The types of Asexual reproduction include: fission, fragmentation, budding, vegetative reproduction, spore formation and agamogenesis.
When hydrogen and fluorine bond, the fluorine atom's electron configuration most resembles which element? A. nitrogen B. helium C. oxygen D. neon
Answer:
D. neon.
Explanation:
Hello there!
In this case, according to the following bonding:
[tex]H-F[/tex]
It is possible to bear to mind the fact that hydrogen has one valence electron whereas fluorine has seven. Moreover, once they bond, we understand fluorine takes the only hydrogen's valence electron to attain the electron configuration of the former's contiguous noble gas which is D. neon.
Best regards!
Green plant cells photosynthesize and do NOT need Cellular Respiration. true or false
Lab: Titration Assignment: Lab Report
I need the answer to the graph on the last page.
Answer:
There is none
Explanation:
Answer: I've attached my lab report for anyone who needs it. Hope this helps! (I didn't know what to put for some of the answers on the graph, but I've filled it out for the most part)
Which statement is correct?
Natural processes happen spontaneously when they decrease the entropy of a system because entropy increase is counteracted by the flow of enthalpy from high temperatures to low temperatures.
Among solids, liquids, and gases, solids generally have the highest entropy because solid particles are the least mobile, and entropy is inversely related to mobility of particles.
Any change that increases the number of particles in a system increases entropy because it increases the randomness and disorder of the system.
Dissolving table salt (NaCl) in water leads to a decrease in entropy because salt particles, which are numerous individual crystals in solid form, become a homogenous solution in water.
Answer:
Any change that increases the number of particles in a system increases entropy because it increases the randomness and disorder of the system.
Explanation:
Imagine dropping a glass pitcher on a hard surface. The pitcher breaks into numerous shards. If the shards were collected and dropped again, they would tend to break into smaller shards; they would not reassemble themselves into a pitcher. In the universe, there is a tendency for order to be replaced with disorder. This tendency is related to a concept called entropy. The formal definition of entropy is a measure of the degree of randomness and disorder in a system.
How many atoms does 9.3 moles of Mo represent?
Answer:
5.60 × 10²⁴ Mo atomsExplanation:
The number of atoms can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
N = 9.3 × 6.02 × 10²³
We have the final answer as
5.60 × 10²⁴ Mo atomsHope this helps you
Write Avogadro's number in "longhand", and then in scientific notation.
Answer:
Explanation: the scientific notation used to calculate a mole is 6.022 x 1023.
Avogadro's number in scientific notation is 6.023×10²³ atoms, molecules, moles.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number.
Learn more about Avogadro's number,here:
https://brainly.com/question/11907018
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Neutral atoms of neon with atomic
number 10 have the same number of
electrons as
a o²+
b ca²+
c
Answer:
d. Mg²⁺
Explanation:
c. K⁺
d. Mg²⁺
Based on the Bohr's atomic model, the atom has electrons (Mass 0; Charge -1), protons (Mass 1; Charge +1) and neutrons (Mass 1; Charge 0).
The atomic number is equal to the number of protons. That means there are 10 protons. As the Neon is netural, the amount of electrons must be 10.
A neutral atom of Mg has 12 electrons, that means the Mg²⁺ has 10 electrons the same than Ne.
Right option is:
d. Mg²⁺