Answer:
The answer is 80!
Explanation:
A prism is a three dimensional solid object in which the two ends are identical. It is the combination of the flat faces, identical bases and equal cross sections. The volume of the prism is 819 cm³.
What is the volume of the prism?A prism is a polyhedron with two parallel congruent faces called the bases that are polygons. The volume of a three dimensional solid is the amount of space it occupies. The volume is measured in cubic units. The volume can be denoted in m³, cm³, ft³, etc.
The volume of a prism is the area of the base times the height. The equation used to calculate the volume is:
Volume = Base area × Height
Here the rectangle has 9cm length and 7cm width. Then the area is:
Area = 9 × 7 = 63 cm²
The height of prism = 13 cm
Then the volume is:
V = 63 × 13 = 819 cm³
Thus the volume of the prism is 819 cm³.
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Your question is incomplete most probably your full question was
What is volume of the rectangular prism with length 9cm, width 7cm and height 13 cm?
A 14.00-g piece of iron absorbs 1000 joules of heat energy, and its temperature changes from 25°C to 125°C. Calculate the specific heat capacity of iron.
Answer:
THE SPECIFIC HEAT OF IRON IS 0.714 J/g °C
Explanation:
Heat absorbed = 1000 J
Mass of the piece of iron = 14 g
Temeperature changes = ( 125-25)°C= 100°C
specific heat of iron = unknown
To find the specific heat of iron in the question use the formula of heat
Heat = mass * specific heat * temperature change
Specific heat = Heat / mass * temperature change
Specific heat = 1000 / 14 * 100
Specific heat = 1000 / 1400
Specific heat = 0.714 J/g °C
So therefore, the specific heat of iron is 0.714 J/g °C
Se hacen reaccionar 100 g del agente oxidante con 25 g del agente reductor, según la reacción REDOX LaTeX: N_2\left(g\right)+H_2\left(g\right)\longrightarrow NH_3\left(g\right)N 2 ( g ) + H 2 ( g ) ⟶ N H 3 ( g ) Indique el reactivo en exceso y los gramos de amoniaco formado, si la eficiencia del proceso es del 80 %
Answer:
El reactivo en exceso es hidrógeno
97.12g NH₃ son formados
Explanation:
Basados en la reacción:
N₂(g) + 3 H₂(g) → 2 NH₃(g)
El hidrógeno pasa de estado de oxidación 0 a estado de oxidación +1. Al perder un electrón se oxida y es el agente reductor.
El nitrógeno pasa de estado 0 estado -3. Al ganar 3 electrones se reduce y es el agente oxidante.
100g de N₂ son (Peso molecular: 28g/mol):
100g × (1mol / 28g) = 3.57 moles de N₂
Y 25g de H₂ son (Peso molecular: 2g/mol):
25g × (1mol / 2g) = 12.5 moles de H₂
Como 3 moles de hidrógeno reaccionan por mol de nitrógeno, las moles de nitrógeno que se necesitan para hacer reaccionar completamente 12.5 moles de hidrógeno son:
12.5 moles H₂× (1 mol N₂ / 3 moles H₂) = 4.17 moles de nitrógeno.
Como hay 3.57 moles de nitrógeno, el reactivo en exceso es hidrógeno.
Como el reactivo limitante es el nitrógeno y 1 mol de nitrógeno produce 2 moles de amoniaco, las moles de amoniaco son:
3.57 moles de N₂ × (2 moles NH₃ / 1 mol N₂) = 7.14 moles de NH₃
La masa producida idealmente es:
7.14 mol NH₃ ₓ (17g/mol) = 121.4 g de NH₃. Como la eficiencia del proceso es del 80%:
121.4 g NH₃ × 80% = 97.12g NH₃ son formados
Answer:
Excess reactant: H₂
Mass of produced ammonia, 97.1 g
Explanation:
Identify the reaction:
N₂ + 3H₂ → 2NH₃
We identify the reducing agent and the oxidizing agent:
N₂ changed the oxidation state from 0 to -3. This is the reduction, so it is the oxidizing agent. By the way the H₂ is the reducing agent.
We convert the mass to moles:
100 g / 28 g/mol = 3.57 moles of N₂
25 g / 2 g/mol = 12.5 moles of H₂
Ratio is 1:3. For 1 mol of nitrogen, we need 3 moles of hydrogen
Then, 3.57 moles of N₂ would need (3.57 . 3) / 1 = 10.7 moles
We have 12.5 moles of H₂, so the hydrogen is the excess reactant and the nitrogen is the limiting.
To produce ammonia, the reaction needs 1 mol of N₂, that can produce 2 moles of product
3.57 moles of N₂ will produce (3.57 . 2) / 1 = 7.14 moles of NH₃
As yield reaction is 80%, we will produce 7.14 mol . 0.80 = 5.71 moles
We convert the moles to mass: 5.71 mol . 17 g / 1mol = 97.1 g
What is the molar mass of silver oxide (Ag2O)
Answer:
231.735 g/mol
Explanation:
Inorganic compounds which are found in the earth are called: minerals vitamins synthetics cement
Answer:
Minerals
Explanation:
I looked it up on google. Thanks.
1. Calculate the pH of a 0.35 mol/L solution of ammonia.
Answer:
Explanation:
NH3 + H2O ⇌ NH4 + OH-
0.35 0.35
-log[OH-] = -log0.35 = 0.46 = pOH
14 - 0.46 = 13.54 = pH
Which of the following contribute(s) to most of the mass of an atom?
O A) Protons and electrons
B) Protons only
C) Protons and neutrons
OD) Neutrons only
Answer:
C) protons and neutrons
Explanation:
im pretty sure it is c
I NEED HELP PLEASE, THANKS SO MUCH! :)
Solids, liquids and gases are the three most commonly accepted phases of matter. Explain the properties of each phase, including their relative energy.
Answer:
Here's what I get
Explanation:
The molecules of a substance attract each other.
They are also in constant motion.
Their kinetic energy increases with the temperature.
1. Solids
If the temperature is low enough, the molecules will have little kinetic energy.
They will not be able to escape the attractions of their neighbours, so they will be fixed in place in a crystalline array.
All they can do is vibrate about their position in the array.
The substance will be a solid.
2. Liquids
If the temperature is higher, the molecules will have enough kinetic energy to slide past each other, but not enough to escape the attractions of nearby molecules.
The substance will be a liquid.
3. Gases
If the temperature is high enough, the molecules will have enough kinetic energy to escape from the surface and fly off into space.
The molecules will on average so far apart that they won't feel the attractions of others.
When they do collide, they will have energy to bounce off each other rather than stick together.
The substance will be a gas.
Describe the differences seen in the properties of Boron and Nitrogen.
Answer:
Explanation:
As you move from left to right in periodic table the size of atom size decreases, electrongeativity increases.
it mean
Boron is bigger in size than Nitrogen
Boron is less electroneagive than Nitrogen.
can you find simialr to this another factor to realte
I NEED HELP PLEASE, THANKS! :)
Respiration is a three-step process that breaks down glucose and produces ATP. What are those three steps? Explain.
Answer:
Ok so the first step is glycolysis(which involves 10 different 'steps') which is conducted in the cytosol, so this is where glucose breaks down into two molecules of pyruvate.
The breakdown of glucose releases energy which changes ADP to ATP and NAD+ to NADH.
The second step is commonly known as the Krebs Cycle or Citric Acid Cycle(involves 11 steps). This is where pyruvate is broken down into 3CO2.
The breakdown of pyruvate releases energy which changes ADP to ATP, NAD+ to NADH and FAD+ to FADH2
The third step is known as oxidative phosphorylation, this is where energy from NADH and FADH2 is used to generate a H+ gradient, which changes ADP to ATP.
Answer:
Glycolysis, Citric Acid Cycle, and the Electron Transport Chain
Explanation:
Cellular respiration is the process in which cells break down glucose and release the stored energy to make ATP.
Step 1 — Glycolysis
Glycolysis is the conversion of glucose — a C₆ molecule — into two C₃ (pyruvate) fragments.
Step 1a. The linking reaction — pyruvate oxidation
In preparation for the second step, each pyruvate ion loses a carbon atom as CO₂ and forms a two-carbon acetyl group.
The acetyl group is transferred to Coenzyme A to produce acetyl CoA.
Step 2 — the Citric Acid Cycle (CAC)
The acetyl CoA enters the CAC.
In various redox reactions, the C atoms in the acetyl group are oxidized to CO₂.
The electrons are passed to energy-storing molecules like NADH and FADH₂.
3. Step 3 — the Electron Transport Chain (ETC)
The NADH and FADH₂ pass their electrons to the Electron Transport Chain
In a series of redox reactions, the electrons reduce oxygen to water.
The energy released converts ADP to ATP (oxidative phosphorylation)
The whole purpose of respiration is to oxidize glucose to CO₂ and water and use the energy produced to form ATP.
One molecule of glucose produces 2 ATP in glycolysis, 2 in the CAC, and 34 in the ETC.
what is the symbol for Lithium, Iron, and Helium
Lithium=li
Iron=Fe
Helium=He
I don't say u must have to mark my ans as brainliest but if u think it has really helped u plz don't forget to thank me....
Answer:
lithium symbol=li helium= he and iron =i
If the temperature outside is 297 what is this temperature in degrees celsius
Answer:
147.222 degrees C
Explanation:
assuming its 297 F it should be correct
The temperature outside is 297°F then this temperature in celsius is equal to 147.22 °C.
How to convert from Fahrenheit to celsius?Temperature can be described as a physical quantity that expresses quantitatively the perceptions of hotness or coldness. The most general scales are the Celsius scale with (°C), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.
Fahrenheit to Celsius formula can be used to change the temperature from the scale Fahrenheit to degrees Celsius.
The formula that can be used to convert Fahrenheit to Celsius is given below:
[tex]\dusplaystyle ^oC = (^oF - 32) \times \frac{5}{9}[/tex]
Here, F represents the temperature in Fahrenheit, and C represents the temperature in Celsius.
Given the temperature in Fahrenheit = 297 °F
[tex]\dusplaystyle T( ^oC) = (297 - 32) \times \frac{5}{9}[/tex]
T = 147.22 °C
Therefore, the given temperature in celsius is equal to 147.22 °C.
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How many significant figures does 5.750 have?
Answer:
4
Explanation:
Describe how a polyploid is formed
Answer:
ExpPolyploidy is the heritable condition of possessing more than two complete sets of chromosomes. Polyploids are common among plants, as well as among certain groups of fish and amphibians. For instance, some salamanders, frogs, and leeches are polyploids. Many of these polyploid organisms are fit and well-adapted to their environments. In fact, recent findings in genome research indicate that many species that are currently diploid, including humans, were derived from polyploid ancestors (Van de Peer & Meyer, 2005). These species that have experienced ancient genome duplications and then genome reduction are referred to as paleopolyploids. This article discusses the mechanisms underlying polyploidy, and both the advantages and disadvantages of having multiple sets of chromosomes.
Mechanisms of Polyploidy
This diagram shows several pathways by which diploid species can transition to polyploid species and polyploid species can transition to diploid species. Each species is represented by an oval containing two or more colored circles. Each colored circle represents a complete set of chromosomes.
View Full-Size ImageFigure 1
Figure Detail
How does an organism become polyploid? Polyploids arise when a rare mitotic or meiotic catastrophe, such as nondisjunction, causes the formation of gametes that have a complete set of duplicate chromosomes. Diploid gametes are frequently formed in this way. When a diploid gamete fuses with a haploid gamete, a triploid zygote forms, although these triploids are generally unstable and can often be sterile. If a diploid gamete fuses with another diploid gamete, however, this gives rise to a tetraploid zygote, which is potentially stable. Many types of polyploids are found in nature, including tetraploids (four sets of chromosomes), hexaploids (six sets of chromosomes), and other chromosome-pair multiples
The pictures to the right, show two different models
of the atom. Type in the letter of your answer.
Which model best represents Dalton's atomic
theory?
Answer:
The pictures to the right, show two different models of the atom. Type in the letter of your answer.
Which model best represents Dalton’s atomic theory?
B
Which model best represents the modifications to the theory that Thomson’s results made necessary?
A
The model that represents Dalton's atomic model is the B model.
Dalton's Atomic TheoryDalton was a scientist who described how the atom is characterized, stating that the atom would be a massive and indestructible sphere, that is, it was not divided into subparticles (electrons, protons and neutrons).
Thus, model B is the most suitable according to Dalton's statements.
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A student places a 12-gram cube of Ice Inside a container. After six hours, the student returns to observe the contents of the container. Which
sentence suggests that the container is an open system?
ОА
The container contains 12 grams of liquid water and no ice.
B.
The container contains 12 grams of Ice and no liquid water.
D.
The container contains 8 grams of liquid water and no ice.
The container contains 8 grams of ice and 4 grams of liquid water.
The container contains 8 grams of liquid water and 4 grams of water vapor.
E
Answer:
I think its D sorry if im wrong
Answer:i think its D
Explanation:
I NEED HELP PLEASE, THANKS SO MUCH! :)
Solids, liquids and gases are the three most commonly accepted phases of matter. Explain the properties of each phase, including their relative energy.
Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the way the particles inside them differ.
In a gas, the molecules are spread wide apart and moves freely at high speeds
In a liquid, the more closer to each other and will vibrate or slip past each other
In a solid, the molecules are tightly packed, making no room for each other and harder to move. These molecules vibrate and jiggle but, don't move
3. How much power is required to pull a sled if you use
60j of work in secound?
Answer:
The answer is 60W
Power = Work done/ time
time = 1 second
Work done = 60J
Power = 60/1
= 60W
Hope this helps.
What is sodium bicarbonate an example of? a buffer an acid a liquid a base
Answer:
base
Explanation:
carbonic acid - H2CO3 - is a weak acid. Therefore, HCO3 itself is its conjugate base. The Na(sodium) ion is neutral.
This means that NaHCO3 is a base. (a weak one)
The mass of an object is measured in _____. liters meters degrees kilograms
How many moles are there in 500cm3 of a 0.5mol/dm³ solution of sulfuric acid?
Answer:
0.25moles
Explanation:
There are 1000[tex]cm^{3}[/tex] for 1[tex]dm^{3}[/tex]
Therefore in 1000[tex]cm^{3}[/tex] of 0.5 mol/[tex]dm^{3}[/tex] solution has = 0.5 moles
Therefore 500[tex]cm^{3}[/tex] contains = 0.5/1000 x 500 = 0.25moles
The number of moles of sulfuric acid in 0.5 mol/dm³ solution is equal to 0.25 mol.
What is the molarity?The concentration of the solution can be determined as the number of moles of a solute in per unit volume of a solution is known as molarity or molar concentration.
The Molarity of the solution is calculated in the following formula:
Molarity (M) = Moles (n)/Volume of the Solution (in L)
Now if we have to find the number of moles of solute in the solution, the formula becomes:
Number of moles of solute (n) = Molarity (M) × Volume of the Solution
Given, the concentration of the sulfuric acid solution = 0.5 mol/dm³
The volume of the solution, V = 500 cm³
As we know, 1 dm³ = 10³ cm³, the volume of solution = 0.5 dm³
The number of moles of the sulfuric acid = M × V
= 0.5 × 0.5 = 0.25 mol
Therefore, 0.25 moles of sulfuric acid in 500cm3 of a 0.5mol/dm³ solution of sulfuric acid.
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HELP!!!!!!!!!!!!!!!! PRETTY PLEASE !!!!!!!!!!!!!!!!
Answer:
B. 75.0 kPa
Explanation:
P1V1/T1=P2V2/T2
(x * 100 L)/(300 K)=(100 kPa * 50.0 L)/(200 K)
x=75.0 kPa
Answer:
24rq3r54
Explanation:
3t5q6tq6tq
Predict your observation if a magnesium ribbon is put in potassium hydroxide solution and tested with a lighted wooden splinter.
mg reacts with the acid and produce visible bubbles of hydrogen gas. they will produce audible pops as the hydrogen ignites. ... Hydrochloric acid is a corrosive liquid. Hydrogen gas is explosive.
Which of the following is a polyatomic ion?
O A N₂
B. HCl
O C. S2
O D. PO43-
Answer:
The answer is D..i.e phosphate. it consists of 1p and 4oxygen atoms
[tex]PO_4^{3-}[/tex] is a polyatomic ion. Hence, option D is correct.
What is a polyatomic ion?
Polyatomic ions are ions which consist of more than one atom.
The prefix poly- means many, so a polyatomic ion is an ion that contains more than one atom. This differentiates polyatomic ions from monatomic ions, which contain only one atom.
[tex]PO_4^{3-}[/tex] is a chemical derivative of phosphoric acid with a chemical name Phosphate. Phosphate is also called Phosphate ion or Orthophosphate.
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nvironmental Science
a.
Identify the biotic factor of an ecosystem from the following:
soil composition
b. trees
temperature
d. sunlight
C.
Answer:
c
Explanation:
Soil, Plants get energy from the sun.. Answer is C.
Answer:
B. trees
Explanation:
A biotic factor is something in an environment or ecosystem that is living. For example, plants and animals are biotic factors. An abiotic factor is just the opposite-they are not living. Rocks and water are examples of abiotic factors.
Soil composition, temperature and sunlight are all not alive. Therefore, they must be abiotic factors.
Trees are living organism. This means that they are biotic factors. So, the correct answer is B: trees.
A.
B.
C.
D.
what’s the correct answer?
Answer:
C Gamma Rays
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: *gamma rays* ,X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
An alkali is able to "cancel" out an acid. What is the other word for "cancelling out the acid"? * a) neutralise b) overcome c) nullify d) become acidic
Answer:
the correct answers is "neutralize"
Explanation:
When an acid is related to a base or also called an alkali and they reach a pH of 7, this acid will be neutralized or it will be canceled as the question says.
This happens so it reaches an equilibrium between both compounds, where the solution medium where these two compounds are is NEITHER ACID NOR BASIC, that is why it is called NEUTRAL medium.
Whenever you read that the pH of a solution is balanced, a neutralized acid, or a ph7 it means that the solution is NEUTRAL.
The three states of matter can be arranged in the increasing order of interparticle forces as 1) gas > liquid >solid 2) solid >liquid > gas 3) liquid > gas > solid pls answer fast
Answer:
OPTION 2 SOLID>LIQUID>GAS
Explanation:
because the inter molecular forces are the strongest in the solid than in liquid and than in gas
) What is the definition of an enzyme? A.Enzymes are carbohydrate molecules that act as catalysts to speed up chemical reactions in living things. B.Enzymes are polymer molecules that act as catalysts to slow down chemical reactions in living things. C.Enzymes are protein molecules that act as catalysts to speed up chemical reactions in living things. D.Enzymes are fat molecules that act as catalysts to speed up chemical reactions in living things. E.Enzymes are protein molecules that act as catalysts to slow down chemical reactions in living things.
Answer:
option c
enzymes are protein molecules that act as catalysts to speed up bio chemical reactions
This formula equation is unbalanced. Pb(NO3)2(aq) + Li2SO4(aq) Right arrow. PbSO4(s) + LiNO3(aq) Which coefficient should appear in front of LiNO3 in the balanced equation? 1 2 3 4
Answer:2
Explanation:
Answer:
2
Explanation:
Using distributive property solve 9×19
Answer:
9*(10+9)
(90+81)
(171) is the answer
