Answer:
chlorophyll
Explanation:
If 27.3g of C8H18 is combusted, according to the equation below, what mass of water is produced?
2C8H18 + 25O2 --> 16CO2 + 18 H2O,
molar masses: C8H18 = 114.3 g/mol O2 = 32.0 g/mol CO2 = 44.0 g/mol H2O = 18.0 g/mol
Answer:
38.7 g
Explanation:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18 H₂OFirst we convert 27.3 grams of C₈H₁₈ into moles, using the given molar mass:
27.3 g C₈H₁₈ ÷ 114.3 g/mol = 0.239 mol C₈H₁₈Then we convert 0.239 moles of C₈H₁₈ into moles of H₂O, using the stoichiometric coefficients of the reaction:
0.239 mol C₈H₁₈ * [tex]\frac{18molH_2O}{2molC_8H_{18}}[/tex] = 2.151 mol H₂OFinally we convert 2.151 moles of H₂O into grams, using water's molar mass:
2.151 mol H₂O * 18.0 g/mol = 38.7 gThe liquid metal at room temperature (a) Mercury (b) Sodium (c) Magnesium (d) Silver
Answer:
(a) Mercury
Explanation:
Mercury with chemical symbol (Hg) is also regarded as " quicksilver". It is heavy and silvery in nature and belongs to d-block of the periodic table, it is metallic element and it is liquid at standard conditions of (temperature and pressure). It has Boiling point of about 356.7 °C with Atomic number of 80. It can molten above the temperature of ( −38.8 °C)
how many moles of water is 5.02 x 10 18 molecules of water
Answer:
8.334×10^-6 moles
Explanation:
a mole is 6.023×10^23
5.02×10^18 ÷ 6.023×10^23=8.33×10^-6
so there are 8.33×10^-6 moles of water in 5.02x10^18 molecules of water
The number of moles of water in which 5.02 × 10¹⁸ molecules of water is present is 8.33 × 10⁻⁶.
What is moles?
Moles is a unit which is used to tells about the quantity of any substance, in one moles of any substance 6.023 × 10²³ number of atoms of that substances are present.
In 1 mole of water = 6.023 × 10²³ number of molecules of water is present
So, number of 5.02 × 10¹⁸ molecules of water present in how many moles will be calculated as:
Required moles = 5.02 × 10¹⁸ / 6.023 × 10²³ = 8.33 × 10⁻⁶
Hence, required moles is 8.33 × 10⁻⁶.
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PLEASE HELPPP WILL GIVE BRAINLIEST!!!
Answer:
placental mammals
Explanation:
Answer:
B) placental mammals
Explanation:
Which phrase best describes an individual organ?
O A. The simplest unit of life
O B. Made of different kinds of tissues
C. Made of one kind of cell
O D. Meets all the needs of an organism
Answer:
made of different kinds of tissues
Explanation:
cause that's the only one that makes sense because it goes: cell, tissues,organ,organ system , organism
1. the simplest unit of life - cell
2. a individual organ - would be made of different kinds of tissues
3. tissues - would be made of one kind of cell
4- an organ system - meets all the needs of a organism
also it wouldn't make sense for a individual organ to be made of only one kind of cell so yeah
good luck :) I hope this was right
__MgCl2 +
_Na3PO4 -->
NaCl
_Mg3(PO4)2 +
---
In the reaction above, how many moles of sodium chloride would be produced
if you started with 20 grams of magnesium chloride and excess sodium
phosphate? The equation is not balanced.
(If anyone can answer in depth if appreciate it )
Answer:
24.5 g of NaCl
Explanation:
We begin from the balanced reaction:
3MgCl₂ + 2Na₃PO₄ → 6NaCl + Mg₃(PO₄)₂
If the sodium phosphate is in excess, then the limting reagent is the magnessium chloride.
We convert mass to moles:
20 g . 1mol / 95.2g = 0.210 moles.
3 moles of MgCl₂ can produce 6 moles of NaCl
0.210 moles of salt, may produce (0.210 . 6) /3 = 0.420 moles
Ratio of reactant is twice the product
We convert the moles to mass:
0.420 mol . 58.45 g/mol = 24.5 g
Help. I’ll give brainliest.
Answer:
obviously it is 6 km cause that's the longest length
Answer:
the answer is A
Explanation:
Its A because 6km is the longest and 1Km = 1000 meters
How are hydrogen atoms arranged in ethene? in -different planes, separated by angles of 180° in -the same plane, separated by angles of 120° in -the same plane, separated by angles of 1800 in -different planes, separated by angles of 1200
Answer:
Explanation:
How best to demonstrate the equivalence of hydrogens in
H 2 C = C H 2 ?
1 H NM R spectroscopy would be the best way to show this. The 4 hydrogens give the one signal.
Explanation:
1. Determine the pH of the following solutions:
a. 1 x 10-3 M HCI
please refer to the attachment
Hope This Helps You ❤️
Answer:
HCI is a strong acid : HCI -> h^+ + CI^- [ H^+ ] = 1.0 x 10 ^-3 -> pH = -log[ H^+ ] = -log 10 ^-3 = 3
Explanation:
The answer to this question
Answer:
C. seems to be the answer as ionic comlopunds have high melting points becuase of the anion cation bond which is not seen in covalent bonds that share electrons in polar arragnements.
Explanation:
Answer:
I think is B hopefully is
Calculate the molecules in 9.78 moles of oxygen gas
Calculate the number of grams in 2.44e26 molecules of carbon dioxide, CO?
How many atoms are in 3.73e-2 moles of potassium
How many moles are in 11.8 grams of Barium?
Calculate the number of particles in 43.2 grams of N2O
The chemical formula for aspirin is C9H8O4. What is the mass in grams of 0.60 moles of aspirin
Answer:
i am quite unsure what you want me to answer but if you explain it to me w ould live to help
Explanation:
Calculate the volume of 150kg of chlorine gas at room temperature and pressure. The volume of one mole of gas at room temperature and pressure is 24.0dm^3. Relative formula mass (Mr): Cl2=71
Answer:
Given mass 150 kg= 150000 gram
molar mass 71 gram
number of moles = given mass/molar mass
= 2112.76 moles
1 mole = 24 Dm³
2112.76 mole =24×2112.76= 50706.24 Dm³
The volume of the mole of gas at room temperature and pressure is 50,704.08dm³
We need to first calculate the number of moles of Chlorine gas (Cl₂)
Number of moles = Mass/Molar mass
Given the following parameters
The molar mass of Cl₂ = 71g/mol
Mass of chlorine gas = 150kg = 150,000g
Get the number of moles
[tex]n=\frac{150,000}{71}\\n=2,112.67moles\\[/tex]
Given that volume of 1 mole at STP = 24.0dm³
2112.67 moles = x
Get the volume of the chlorine gas at STP.
Volume of Cl₂ at STP = 24 × 2112.67
Volume of Cl₂ at STP = 50,704.08dm³
Hence the volume of the mole of gas at room temperature and pressure is 50,704.08dm³
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what is 606 as a 2 sig fig answer?
6, 0
thats the answer, i hope it helps
What is the H 2 : H2O molar ratio?
Answer:
The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.
Explanation:
What is the Great Red Spot on Jupiter?
Answer:
The Great Red Spot is a storm in Jupiter's southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds that exceed those in any storm on Earth. The Great Red Spot has slowly changed over the years, and is currently about 1.3 times as wide as our planet.
How does the heart keep the blood flowing throughout the body?
It contracts and relaxes
It inflates and deflates
It inhales and exhales
It opens and closes
Answer:
b
Explanation:
Answer:
It contracts and relaxes awnser is a
Explanation:
im from flvs
Can someone please help
Answer:
1. c) shiny
2) True. Reactivity is a chemical property.
1. A metal is shiny
2. yes
that's all
What happens with electrons in a non-polar bond?
Brainliest!!!!!!!
Answer:
In a nonpolar covalent bond, the atoms share electrons equally with one another.
Explanation:
Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecule.
The hot liquid substance that is inside the earth is referred to as lava or magma?
Answer:
magma
Explanation:
i did a test on it
The hot liquid substance that is inside the Earth is referred to as magma.
If this is incorrect, please, don't refrain to tell me. Thank you.
Name the gases that mostly compose the atmosphere.
O Argon and Carbon Dioxide
O Oxygen and Carbon Dioxide
Oxygen and Nitrogen
Carbon Dioxide and Nitrogen
Explanation:
Oxygen and Nitrogen. is the correct pair.
In a city, the buildings, streets, air,
and water are all ______
parts of the environment.
Answer:
living part of the environment
El mercurio ha sido utilizado como elemento para medir la temperatura porque Es una mezcla. Al aumentar la temperatura se dilata con facilidad. Es un buen conductor del calor. Es un buen conductor de la electricidad.
Answer:
La respuesta correcta es: Al aumentar la temperatura se dilata con facilidad
Explanation:
El mercurio (Hg) es un elemento metálico que a temperatura ambiente es un líquido. Tiene la propiedad de dilatarse con facilidad al aumentar la temperatura, propiedad que ha sido utilizada en los termómetros de mercurio. En estos termómetros, el mercurio está dentro de un tubo de vidrio graduado con un bulbo para transmitir el calor. Al estar en contacto con un cuerpo más caliente (a mayor temperatura), el mercurio del interior del termómetro se dilata (expande su volumen) y asciende por el tubo indicando la temperatura correspondiente, graduada en el vidrio.
1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at
25°C?
Answer:
187.34 atm
Explanation:
From the question,
PV = nRT.................. Equation 1
Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.
make P the subject of the equation
P = nRT/V.............. Equation 2
n = mass(m)/molar mass(m')
n = m/m'............... Equation 3
Substitute equation 3 into equation 2
P = (m/m')RT/V............ Equation 4
Given: m = 46 g, T = 25°C = (25+273) = 298 K, V = 3.00 L
Constant: m' = 2 g/mol, R = 0.082 atmL/K.mol
Substitute these values into equation 4
P = (46/2)(0.082×298)/3
P = (23×0.082×298)/3
P = 187.34 atm
I NEED HELP PLEASE THANK YOUUU
I think the answer is c if not then try a
Answer: B
Explanation:
WHAT CAN BE USED TO REPLACE OIL? help 30POINTS!!!!! ASAP
Answer:
Melted butter
Explanation:
Answer:
Look below
Explanation:
The following may be substituted cup for cup for vegetable oil in baked goods:
Applesauce, preferably unsweetened.
Banana, ripe and mashed.
Butter, melted.
Cauliflower – unseasoned, cooked, and pureed.
Ghee.
Margarine, melted.
Mayonnaise.
Pumpkin, cooked and pureed.
What is the answer to this?
the answer is A.
the scientist used mud and vinegar to make a model of the volcano.
A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. with the law of conservation of mass because the mass of reactants A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. the mass of products.
Answer: The data are consistent with the law of conservation of mass because the mass of reactants equals the mass of products
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. 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.
Given: mass of sodium = 12.8 g
mass of chlorine = 19.6 g
mass of reactants = mass of sodium + mass of chlorine = 12.8 g + 19.6 g = 32.4 g
Mass of product = Mass of sodium chloride = 32.4 g
As mass of reactant = mass of products , Thus results are in accordance with the law of conservation of mass.
why is the air so warm at the equator
Answer:
C
Explanation:
Same reason as the answer before mine, but the answer to your questionaire is C.
Read the temp what is it?
Identify one factor represented in the diagram that is used to classify the ten types of clouds