Answer:-18 KJ
Explanation:
The second reaction is obtained from the first when the first reaction is divided by 2 and reversed. The enthalpy change for the second reaction is -18 kJ.
What is enthalpy?The term enthalpy is defined as the heat absorbed or evolved in a reaction. It could be positive or negative.
If we look at the two reactions as shown in the question, we can see that the second reaction is obtained from the first when the first reaction is divided by 2 and reversed.
Hence, it the follows that the enthalpy change for the second reaction is -18 kJ.
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We use yeast, seen below, when we make bread. Some warm water and a little sugar and yeast are ready to divide through budding. Each yeast cell is identical to its parent cell. This is similar to regeneration in protists. This is a form of __________ reproduction.
Question 13 options:
abiotic
aexual
genetic
seual
A graduated cylinder contains 15.0 mL of water. When a metal solid is added to the cylinder the water level rises to 35.5 mL. The metal solid is massed on a balance and its mass is found to be 154.32 g. What is the density of the metal?
1. Which is a substance that cannot be broken down into another substance?
O compound
O atom
O element
O
molecule
Answer:
Atom
Explanation:
my theory:
Atoms are their own substance. It's atom because if you tried to break an atom, you would be going into nuclear physics. That would be unsafe and dangerous.
Answer:
Explanation:
1. Compound
yup thas ittkew efjejkejg ghioen
How many liters of H2O gas are produced when
7.25 liters of C3H8 are
burned at STP?
C3H8 + 5O2 → 3CO2 + 4H2O
(pls show work)
What type of energy transformation happens when you boil water
Answer:
thermal energy.
Explanation:
Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.
can guys help me to answer it
What would be the osmotic pressure at 65 °C of an aqueous solution containing 2.50 g of sucrose (C12H22011) per 205 ml of solution?
The osmotic pressure at 65 °C of an aqueous solution containing 2.50 g of sucrose is 0.988 atm
How to determine the mole of sucrose Mass of sucrose = 2.5 gMolar mass of sucrose = 342 g/mol Mole of sucrose =?
Mole = mass /molar mass
Mole of sucrose = 2.5 / 342
Mole of sucrose = 0.0073 mole
How to determine the molarity of sucrose Mole of sucrose = 0.0073 mole Volume = 205 mL = 205 / 1000 = 0.205 L
Molarity =?
Molarity = mole / Volume
Molarity of sucrose = 0.0073 / 0.205
Molarity of sucrose = 0.0356 M
How to determine the osmotic pressure Molarity (M) = 0.0356 MTemperature (T) = 65 °C = 65 + 273 = 338 KGas constant (R) = 0.0821 atm.L/Kmol Van't Hoff factor (i) = 1 (sucrose is non-electrolyte) Osmotic pressure (π) =?
π = iMRT
π = 1 × 0.0356 × 0.0821 × 338
π = 0.988 atm
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The movement of solid particles can be described as ________.
Answer:
liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.
Explanation:
In pea plants, the gene for the color of the seed has two alleles. In the following Punnett square shown below, the dominant allele (Y) represents yellow and the recessive allele (y) represents green.
Punnett Square showing a grid that is blank with 4 empty boxes, two columns and two rows. The female parent plant across the horizontal side, top, of the grid indicates a yellow phenotype and a genotype of Yy. The male parent plant along the vertical side of the grid indicates a yellow phenotype and a genotype of YY.
Based on the Punnett square, what percentage of offspring would be expected to have yellow seeds?
0%
25%
50%
100%
Nvm dont answer
Answer:
100%
Explanation:
since both genotypes are dominant, and one of them is YY, all of the offspring will be yellow.
How was this organism transported to a new ecosystem in the u.s.
Answer:
ExplaIf the organism was transported to a new ecosystem in the USA, this species will be an invasive species, which will reproduce more, and will not have a specific predator, which may bring an imbalance to the ecosystem.
What are Invasive Species?
Invasive Exotic Species or, simply, Invasive Species is defined as an exotic species that proliferates without control and starts to pose a threat to native species and to the balance of ecosystems that it occupies and transforms in its favor. It can even pose a risk to people.
With this information, we can conclude that caution is needed when introducing a new species into a new ecosystem.
Learn more about Invasive Species in brainly.com/question/21452505nation:
What mass of nitrogen trifluoride can be produced when 32.0 G of fluorine is reaction according to the table below
N2+3F2= 2NF3
When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.
What is stoichiometry?Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change.
Let's consider the following balanced equation.
N₂ + 3 F₂ ⇒ 2 NF₃
To calculate the mass of NF₃ formed from 32.0 g of F₂, we need to consider the following relationships.
The molar mass of F₂ is 38.00 g/mol.The molar ratio of F₂ to NF₃ is 3:2.The molar mass of NF₃ is 71.00 g/mol.[tex]32.00gF_2 \frac{1molF_2}{38.00gF_2} \frac{2molNF_3}{3molF_2} \frac{71.00gNF_3}{1molNF_3} = 39.86gNF_3[/tex]
When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.
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How can atoms exist in an electrically neutral state
Answer:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
Explanation:
at what point does the radiation start to affect satellites in the atmosphere
HELP NOW!
S + O₂ → SO₃
a. What type of reaction is the above reaction? *
b. When balanced, what is the ratio of coefficients for the above reaction? *
Combination Reaction.
Explanation:
Find the "natural" equilibrium concentration of NO in air in units of molecules/cm3 .
Answer:
6400 molecules / cm^3
Explanation:
10.6*10^-16 mol/L * 6.022*10^23 molecules/mol * 1 L / 1000 cm^3 * 1 / 100 L = 6400 molecules / cm^3
The "natural" equilibrium concentration of Nitric oxide in air in units of molecules/cm .0.062molecules/cm3
chemical equilibrium or equilibrium concentration is a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction. At the same time, there is no change in the products and reactants, and it seems that the reaction has stopped.
How do you find the equilibrium concentration?The equation for Beer's law is a straight line with the general form of y = mx +b. where the slope, m, is equal to εl. In this case, use the absorbance found for your unknown, along with the slope of your best fit line, to determine c, the concentration of the unknown solution.
Does equilibrium mean same concentration?Reversible reactions occur until equilibrium is established, meaning that they achieve a sort of balance between amounts of reactant and product. If the reactants and products are equal in energy, at equilibrium, they will have the same concentration.
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A sample of propane, C3H8 , contains 13.8 moles of carbon atoms. How many total moles of atoms does the sample contain
9.69 × 10^7 in decimal form
...alcohol has been produced by fermentation of grains and fruits, and
consumed for thousands of years in various forms.
A) Ethyl
B) Methyl
C) Propyl
D) All the above
ANSWER: A
Answer:
Ethyl
Explanation:
Ethyl alcohol is a very good in case of storage.It can be stored for over than 1000 years .Historians discovered many bottles of ethyl alcohol stored before 2000Yearswhat do scientist study to reconstruct past climate conditions?
List the steps that occur in a generator that transform the mechanical energy of the turbine
into electricity. Be sure to include the role that magnetic and electric fields play in the process.
Electric charges flow through connection wires to constitutes electric current which supplie the generator.
What is generatorAn electric generator are used to generate electricity, they converts mechanical energy to form electricity.
Electric charges are available in the wire will winds through an external electric circuit to generate electricity.
Electric charges flow through this wires to constitutes electric current which supplies the generator.
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Calculate Density:
Volume=13cm3, Mass=147.55g
Someone please help
Answer:
11.35 g/cm³
Explanation:
If your rounding then 11.4. hope this helps :)
Which solution between molecular compounds denoted alkane and alkene, can be analyzed using a UV/Vis spectrophotometer? Explain.
Answer:
UV/Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of different analytes, such as transition metal ions, highly conjugated organic compounds, and certain biological macromolecules. Measurement is usually carried out in solution.
Explanation:
Name the substances
50 pointssss! Please help me
Answer:
may I know the directions?
Explanation:
pls put a deroction
a. 2-methyl-2-propanol
b. 2-butene 1-ol
c. 3-methyl 2-butanol
d. 3-methyl 2-pentanol
How are compounds and mixtures different from one another?
Answer:
Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.
Explanation:
brainliest?
Answer:
the things they are made out of
Which type of plate boundary is responsible for creating mountains?
O divergent boundary
O Continental-oceanic convergent boundary
O oceanic-oceanic convergent boundary
O Continental-continental convergent boundary
Answer:
O Continental-continental convergent boundary
Explanation:
Hope it helps.
PLEASE HELPPP ASAPPPPP!!!!!
Where is the moon located in a eclipse season
Answer:
During the eclipse season, the Moon is at a low ecliptic latitude (less than around 1.5° north or south), hence the Sun, Moon, and Earth become aligned straight enough (in syzygy) for an eclipse to occur.
Explanation:
What are the biggest challenges when it comes to recycling Polyolefins for Mechanical Recycling.
Answer:
The use of post-consumer polyolefins is increasing due to the pledges of multiple organizations to use higher concentrations of recycled materials in packaging. However, direct food contact applications are challenging with various regulations around the world mandating minimum safety requirements, which is often determined by the condition of use (microwave, cold storage) and food type (fatty, aqueous, dry). This article reviews different predictive models that have been developed to study contaminant migration from packaging to food contact articles. It also examines multiple techniques and methods that have been employed to quantify and assess to the safety of recycled materials (e.g., United States and Europe) which serve as a base for the regulatory framework for many other countries. The presence of different contaminants during polymer processing is also discussed due to potential problems from the presence of harmful compounds affecting human health or degradation of material properties.
FeCl3 + NaOH → Fe(OH)3 + NaCl
[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]
Here's the solution ~
The required balanced equation is :[tex]\qquad \sf FeCl_3 + 3 \: NaOH \dashrightarrow Fe(OH)_3 + 3 \: NaCl[/tex]
Reactant Side : Iron (Fe) = 1Sodium (Na) = 3Oxygen (O) = 3 Hydrogen (H) = 3Chlorine (Cl) = 3Product side : Iron (Fe) = 1Sodium (Na) = 3Oxygen (O) = 3 Hydrogen (H) = 3Chlorine (Cl) = 3