Answer:
Ne gets home at 1:45.
Explanation:
It’s 11:00. He takes 1 hour to make the 40 mile trip. It’s 12:00. He takes 60 minutes to gather lunch, rod and reel, and at the lake. It’s 1:00. He takes 45 minutes to get home. It’s 1:45.
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How many electrons do oxide ions lose during electrolysis?
Answer:
2 Electrons
Explanation: Aluminium atoms are formed at the negative electrode, and Oxide ions are attracted to the positive electrode. Oxygen is formed at the positive electrode.
Newton updated Kepler's third law to include the
period or semi-major axis.
Omass
O speed
O momentum
O acceleration
A mixture is unevenly distributed
Answer:
Yea it is
Explanation:
how many grams are in 3.45 moles of CO2?
Answer:
The weight of 3.45 moles of carbon dioxide has been 151.8 grams.
Moles can be calculated as the mass of solute present with respect to the molecular mass of the solute.
Moles can be expressed as:
Moles = \rm \dfrac{weight}{molecular\;weight}
molecularweight
weight
The molecular weight of carbon dioxide has been 44 grams/mol.
The given moles of carbon dioxide = 3.45 moles.
3.45 mol = \rm \dfrac{weight}{44\;g/mol}
44g/mol
weight
Weight of carbon dioxide = 3.45 \times× 44 grams
Weight of carbon dioxide = 151.8 grams.
The weight of 3.45 moles of carbon dioxide has been 151.8 grams.
How are all planets in the solar system similar?
They have a gas atmosphere.
They have a water atmosphere.
They have a gas surface composition.
They have a rock surface composition.
Answer:
A
Explanation:
A makes the most sense.
due Tonight!!!!!!!!!!
Answer:
element
Explanation:
An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. • There are about 117 elements.
Answer:
element I think...
Explanation:Im not sure but i guess because a element is a type of force
The ocean stores carbon from its interactions with the atmosphere, so the ocean serves as (a) _________ for the carbon cycle.(1 point)
Answer:The ocean takes up carbon dioxide through photosynthesis
Explanation: by plant-like organisms (phytoplankton), as well as by simple chemistry: carbon dioxide dissolves in water.As we burn fossil fuels and atmospheric carbon dioxide levels go up, the ocean absorbs more carbon dioxide to stay in balance.
ASAP!!! Explain: Why do black lines appear on the absorption spectrum of the sun?
The black lines in the Sun's spectrum are caused by gases on, or above, the Sun's surface that absorb some of the emitted light.
Which structure is not an isomer of pentane and state why?
1) Pentane:CH3CH2CH2CH2CH3
2) 2-methyl-butane: CH3CHCH3CH2CH3
3) 2,2-dimethylpropane : C5H12
Answer:
2,2-dimethylpropane : C5H12
becoz formula of propane is
C3H8
Jim needs to conduct his experiment at STP .Which condition must he use?
Answer:
273 K, 101.3 kPa
Explanation: I just did the quiz
To acquires STP condition, Jim must apply a temperature 298 K and 1 atm pressure. At STP condition one mole of all gases occupies a volume of 22.4 liters.
What is STP condition ?The standard temperature and pressure is called STP condition. A temperature of 298 K and pressure of 1 atm is called standard temperature and pressure.
At STP condition, the volume of one mole of any substance is 22.4 liters. One mole corresponds to 6.02 × 10²³ molecules. By satisfying the STP condition, we can determine the volume, and other mole parameters of a compound.
Experiments can be conducted at STP condition by applying a temperature of 298 K which is equal to 25°C and a pressure of 1 atm. He can use a thermometer and barometer to measure and set the values of temperature and pressure.
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The mass of a hypothetical planet is 1 100 that of the earth and it’s radius is 1 4 that of earth. If a person weighs 500 n on earth, what would he weigh on this planet?.
Answer: Your answer is 24
Explanation:
What makes up a Solar System?
Answer: It's just the Primary planets and the dwarf planets and the sun, The orbit courses, and the gravitational pull that keeps them orbiting.
Explanation: Make me brainliest, please Help me out
I need help please!!! Name the parts making up the female part of the flower and state what each part does. Please use your own words no copy and pasting cause this is a lab I’m doing
The female part is the pistil. The pistil usually is located in the center of the flower and is made up of three parts: the stigma, style, and ovary. The stigma is the sticky knob at the top of the pistil. It is attached to the long, tubelike structure called the style.
Hope It Will Help You!Copper exists in nature as two isotopes. The atomic masses and relative abundance of these isotopes is given in the table. What is the average atomic mass of copper? A. 62. 93 amu B. 63. 55 amu C. 63. 935 amu D. 64. 94 amu E. 127. 87 amu.
The average atomic mass of copper is 63.55.
The correct option is B. 63. 55
What is copper?Copper is a chemical element with the symbol Cu. This is a metal that is a ductile, malleable, and good conductor of electricity.
Now,
The two isotopes of copper are:
63Cu with the isotopic mass 62.93
65Cu, with an isotopic mass of 34.93
63Cu has a 69.2% abundance.
65Cu has 30.8% abundance.
The average atomic mass of Cu will be
62.93×69.2% + 64.93×30.8% = 63.55 amu.
Thus, the average atomic mass of copper is 63.55.
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Which action is response to external stimuli?
• wearing sunglasses to protect eyes from UV rays
• eating when hungry
• drinking when thirsty
• breathing hard when exercising because of a drop in oxygen levels
And this science and this for a Unit Test
Answer:
wearing sunglasses to protect eyes from UV rays
Explanation:
this is the only stimuli that occurs outside of the body givej the options
Answer:
A) wearing sunglasses to protect eyes from UV rays
Explanation:
i took the test
How many moles in 67.8 g of F2 ( Fluorine compound)?
Answer:
1.78 moles
Explanation:
to find moles, use the formula moles=mass/rfm
the rfm is the mass number (the bigger number) on the element's square thingy on the periodic table
the mass number of fluorine is 19
19*2 (because it's diatomic you multiply it by 2) =38
so 67.8/38=1.78421052632
round it to 2 sf= 1.78 moles
Why do phospholipids form a bi-layer in the presence of water?.
Answer:
The long fatty acid chains of a phospholipid are nonpolar and thus avoid water because of their insolubility.
Explanation:
"In a water solution, phospholipids form a bilayer where the hydrophobic tails point towards each other on the interior and only the hydrophilic heads are exposed to the water".
2. Which of the following solution contains more salt?
A. 3M
B. 1M
C. 0.5M
D. 0.25M
Answer: 0.25M
Explanation: Because of the highest concentration of water and, if they are all the same volume, the greatest amount of water assuming it is a solid solute in a water solution.
what are 3 common chemical reactions of the carbon family?
1. form covalent compounds.
2. nonreactive.
3. ionic compounds.
The carbon family elements have widely variable physical and chemical properties. Overall, the carbon family elements are stable and tend to be fairly unreactive. The elements tend to form covalent compounds, though tin and lead also form ionic compounds.
Reaction of carbon with air
Carbon, as graphite, burns to form gaseous carbon (IV) oxide (carbon dioxide), CO2. Diamond is a form of carbon and also burns in air when heated to 600-800°C - an expensive way to make carbon dioxide! ... This reaction is important. In industry, air is blown through hot coke.
How does nickel make stainless steel not magnetic?.
What role does water play in Acid-Base reactions?
Water plays the role of a product in an acid-base reaction.
WHAT IS AN ACID-BASE REACTIONAcid base reaction also called neutralization reaction is a type of reaction involving an acid and a base.
In an acid-base reaction, salt and water is produced as products. For example; sodium hydroxide and hydrochloric acid reacts together to form sodium chloride (salt) and water (H2O).
Therefore, water plays the role of a product in an acid-base reaction.
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a
Jessica has a solution of tea and water. She adds ice to the solution.
Which properties of the solution will change as the ice melts?
a. The mass will decrease.
b. The temperature will decrease.
The volume will increase.
C. The volume will increase
If further increases in substrate concentration do not result in further increases in reaction rate, then an enzyme is likely
Given what we know, we can confirm that if further increases in substrate concentration do not result in further increases in reaction rate, then an enzyme is likely saturated.
What does it mean for an enzyme to be saturated?Enzymes work by binding to the substrate in specific zones of the enzyme. The zones are known as the active sites on enzymes. Since enzymes have a limited amount of these zones, once they are all bonded to a substrate, we can say that it is saturated.
Therefore, the saturation of enzymes allows us to explain how further increases in substrate concentration do not result in further increases in reaction rate.
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Mass is a measure of the amount of matter in which of the following is true about mass?
Scientists measure mass with a balance, such as a triple beam balance
So A is true
When 8.0 g H₂ react with 8.0 g O₂ in the reaction 2H₂ + O₂ → 2H₂O, what are the theoretical yield and the limiting reactant?
Answer:
Now, we have to determine the limiting reagent.
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g of
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2So, the limiting reactant is hydrogen.
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2So, the limiting reactant is hydrogen.Now, 4 g of H₂ forms 36 g of H₂O
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2So, the limiting reactant is hydrogen.Now, 4 g of H₂ forms 36 g of H₂O1 g of H₂ forms 36/4 g of H₂O. 3 g of H₂ forms 36/4 x 3 = 27 g of H₂O
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2So, the limiting reactant is hydrogen.Now, 4 g of H₂ forms 36 g of H₂O1 g of H₂ forms 36/4 g of H₂O. 3 g of H₂ forms 36/4 x 3 = 27 g of H₂OMaximum amount of water that can be formed is 27 g.
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2So, the limiting reactant is hydrogen.Now, 4 g of H₂ forms 36 g of H₂O1 g of H₂ forms 36/4 g of H₂O. 3 g of H₂ forms 36/4 x 3 = 27 g of H₂OMaximum amount of water that can be formed is 27 g.For, amount of oxygen left of unreacted, Only 24 g of oxygen will react.
Now, we have to determine the limiting reagent.4 g of H₂ reacts with 32 g of O₂ 1 g of H₂ reacts with 32/4 g of O₂ 3 g of H₂ reacts with 32/4 x 3 = 24 g ofBut according to the question, 29 g of O₂ is present. 2So, the limiting reactant is hydrogen.Now, 4 g of H₂ forms 36 g of H₂O1 g of H₂ forms 36/4 g of H₂O. 3 g of H₂ forms 36/4 x 3 = 27 g of H₂OMaximum amount of water that can be formed is 27 g.For, amount of oxygen left of unreacted, Only 24 g of oxygen will react.But 29 g is the given amount. Amount of oxygen unreacted = 29 - 24 = 5 g
The theoretical yield of the given chemical equation is 64 g and limiting reactant is oxygen.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
As per the equation 4 g hydrogen reacts with 32 g oxygen thus 8 g hydrogen will react with 8×32/4=64 g oxygen.
Thus, the theoretical yield of the given chemical equation is 64 g .
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How can the rate constant be determined from the rate law?
A. The rate constant can be calculated from the exponents of the
concentrations.
B. The rate constant is the reaction rate divided by the concentration
terms.
O C. The rate constant is the same thing as the reaction rate for the
reaction.
O
D. The rate constant is the reaction rate multiplied by the
concentration terms.
Answer:
B. The rate constant is the reaction rate divided by the concentration
terms.
Explanation:
The rate constant can be determined from the rate law because it is the reaction rate divided by the concentration terms. I hope I could help! :)
Answer: B
Explanation:
i just took the quiz and got it right
Calculate the mass of 4.95 x 10^15 Ag atoms
Answer:
8.87 × 10⁻⁷ grams
Explanation:
Moles = No. of Particles / 6.022 × 10²³ Particles/mol
Moles = 4.95 × 10¹⁵ atoms / 6.022 × 10²³ atoms/mol
Moles = 8.22 × 10⁻⁹ mol
Also,
Mass = Moles × M.Mass
Mass = 8.22 × 10⁻⁹ mol × 107.87 g/mol
Mass = 8.87 × 10⁻⁷ grams
10 moles of carbon dioxide has a mass of 440g. What is the relative formula mass of carbon dioxide ?
Answer:
The relative formula mass of Carbon dioxide is Mass / Moles = 440/10 = 44g
What information does a chemist get from a chemical formula?
Answer:
the elements in a compound and the relative proportions of those elements.
During mitosis, this structure moves individual chromosomes?
Answer:
Anaphase
Explanation:
Two separate classes of movements occur during anaphase. During the first part of anaphase, the kinetochore microtubules shorten, and the chromosomes move toward the spindle poles. During the second part of anaphase, the spindle poles separate as the non-kinetochore microtubules move past each other.
