Answer:
Na k
Explanation:
because na is a metal and potassium is also a metal and both are active metal so is less likely to react as no bond is formed between them
When Santiago and The Alchemist are captured by one of the warring tribes, Santiago must turn himself into the wind to save his life. He asks the desert, the wind, and the sun to help him. As he talks to the sun on page 150-151, Santiago explains why alchemy exists and what alchemists do. What does Santiago say to the sun about these things
Answer:
Explanation:
This expression was adapted from the book named "The Alchemist".
It was in the desert when Santiago and the alchemist were captured by the warring tribes. Santiago gave an explanation to the sun that the wind told him that you know about love, and as the boy(Santiago) said to the sun. "If you know about love, you must also know bout the soul of the world because it's made of love".
Barry makes a hypothesis that driving with his windows closed will increase
his gas mileage. If the gas mileage does not change, what should Barry do
next?
A. Conclude that the gas additive has gone bad
B. Assume that the hypothesis is not useful because it made a wrong
prediction
C. Change the results to show that the hypothesis is correct
D. Repeat the experiment to confirm the result
Answer: D. Repeat the experiment to confirm the results
Why does a person need food?
Answer:
because their body needs to have something in order to function.
Explanation:
Why do organisms evolve?
Organisms make changes to help them survive and reproduce in their environment
Organisms with traits that help them survive and reproduce in their environment pass on those traits.
Changes in the environment cause organisms to change.
Organisms naturally select traits that help them survive and reproduce
In an ecosystem, organisms evolve to make changes to help them survive and reproduce in their environment.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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8. What is the % Al in Aluminum chromate?
PHMWMHWPTYSM(19 points) ok last question tbh I’m a 90 old man jk lolololololololololololol
Explanation:
the answer is circle 3 hope it helps
State three acids, bases, and Salts commonly used in therapeutic processes
PLEASE HELP ME ASAP AND DONT GUESSSS!!!!!!!
Answer:
Digestive
Explanation:
It is necessary for the body to function so it is technically an organ
Answer:
[tex]Question ...4 : D[/tex]
[tex]Question...5: B[/tex]
Explanation:
Hope this helps
Have a nice day
A barometer is used to measure air pressure.
Please select the best answer from the choices provided
Т
F
Trixie Bell is a yearling goat. She consumes 0.75 lb of grain and 4.25 lbs of hay daily.
14% of the grain is digestible protein, but only 2.5% of the hay is digestible protein.
How many grams of protein does Trixie Bell consume daily?
Answer:
95.91 g
Explanation:
First we convert the given masses of grain and hay into grams:
0.75 lb of grain * 454 g/lb = 340.5 g of grain4.25 lb of hay * 454 g/lb = 1929.5 g of hayNow we calculate how many grams of protein Trixie consumes from grain:
340.5 g of grain * 14/100 = 47.67 g proteinAnd do the same for hay:
1929.5 g of hay * 2.5/100 = 48.24 g proteinFinally we add the protein grams:
47.67 + 48.24 = 95.91 gLüderitz and Florianopolis are the same distance from the equator and they are both near the ocean. Use the information on the map to answer these questions: How does the air temperature of Lüderitz compare to the air temperature of Florianopolis? Why?
Answer: At Luderitz, only a little energy is transferred from the ocean to the air. At Florianopolis, a lot of energy is transferred from the air to the ocean. ... Even though the ocean water at each location is a different temperature, the same amount of energy is transferred to the air at both locations.
Explanation:
Both locations are at the same distance from the equator at Lüderitz, only a little energy is transferred from the ocean to the air. Hence option A is correct.
Where is Lüderitz ocated ?The Lüderitz is a coastal town and is located in southwestern nambia and is known for its colonial buildings. It has a desert climate and moderate temperatures throughout the year.
The windy and cold climate occurs due to the south Atlantic current. The place has a little energy that is transferred from the oceans to the air as compared to Florianopolis hat has lots of energy even though the water has different temperatures same energy is transferred to both locations.
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Which gas will have the least collisions between its particles?
A. Helium at 20 C
B. Oxygen at -45 C
C. Carbon dioxide at 80 C
D. Argon at 265 K
The gas that has the least collisions between its particle is helium at 20° C. The correct option is A.
What is collision?Collision is a term used when two particles or object collides or clash and there is an exchange or transformation of energy between them. When a collision happens, the force is exerted on each other.
Helium is the second most abundant element present in the atmosphere. It is the lightest gas and its particle collides when there is an increase in the temperature.
Thus, the correct option is A. Helium at 20° C., regarding the collision of particles between its particles.
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Name NaCl; is it a) molecular b) ionic c) elemental d) strong electrolyte, e) weak electrolyte f) non-electrolyte g) acid h) base i) salt. Explain.
Answer:
i)salt
Explanation:
NaCl is a neutral salt formed by reacting a strong acid HCl and a strong base NaOH. It is also ionic in nature.
It is also called common salt or table salt as it is used as edible in daily our life.
Which of these items is made up of one or more molecules?
Gold
Hydrogen
Salt
Neon
The item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
What is a Molecule?A molecule may be defined as a group of one or more atoms that are held together by numerous chemical bonds. It is the smallest particle of a substance that has all sorts of physical and chemical properties of that substance.
Among the given options, gold and neon are the elements, while salt is a compound. Hydrogen is a gas of diatomic molecules bearing the formula H2. It is colorless, tasteless, odorless, non-toxic, and highly combustible. Hydrogen in its molecular form is more common.
A hydrogen molecule is one of the simplest possible molecules which significantly consists of two protons and two electrons. These protons and electrons are remarkably held together by electrostatic forces.
Therefore, the item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
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HELP PLEASE!! (100 points)
Describe what happens to particles of matter as you cool the matter to absolute zero
(OK). In your description, be sure to explain the changes in kinetic energy and
particle motion
Answer:
As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together. ... As heat is added, the molecules gain more kinetic energy. This shown in their increase motion. When heat is withdrawn, the particles slows down hope this helped
What happens because of nuclear fusion?
A. Earth experiences cold temperatures neede to sustain life.
B. Plants are unable to produce their own food.
C. Animals receive too much heat and begin to die out.
D Earth is provided with heat and light energy needed to sustain life.
Answer:
d
Explanation:
When comparing the subscripts found in both an empirical formula and a molecular formula for a compound, which would have the lowest
numbers for subscripts?
Remember: Do not capitalize your answer. Check spelling
Answer:
Typically the emperical formula
Explanation:
You can think of the meperical formuala as a simplified version of the molecular formula.
if my answer helps please mark as brainliest.
Salt is an ionic compound that is produced when a cation and an anion from an acid-base reaction combine, and solutions of salts can be neutral, acidic, or basic, depending on the acid-base properties of the constituent cations and anions.
a. True
b. False
Answer:
a. True
Explanation:
The statement given regarding salt is correct,
Salt is ionic in nature, as it is composed of a positive ion, i.e. , cation and a negative ion, i.e. , anion.
Salt can be made by the combination of respective acid and base.
There are three nature of salt, acid, base and neutral.
Hence, from the given statement of the question,
The correct option is a. True.
A hot piece of copper was dropped into 155 g of water at 23.6 °C and 2,100 J of energy was transferred to the water. What is the final temperature of the water?
Answer:
26.8 °C
Explanation:
Step 1: Given and required data
Mass of water (m): 155 gEnergy transferred to the water (Q): 2100 JInitial temperature of the water (T₂): 23.6 °CFinal temperature of the water (T₁): ? Specific heat of water (c): 4.184 J/g.°CStep 2: Calculate the final temperature of the water
We will use the following expression.
Q = c × m × (T₂ - T₁)
T₂ = 2100 J/(4.184 J/g.°C) × 155 g + 23.6 °C = 26.8 °C
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The disaccharide lactose can be decomposed into its constituent sugars galactose and glucose. This decomposition can be accomplished through acid-based hydrolysis or by the enzyme lactase. Lactose intolerance in humans is due to the lack of lactase production by cells in the small intestine. However, the stomach is an acidic environment; therefore, one might expect lactose hydrolysis to still be an efficient process. The following data were obtained on the rate of lactose decomposition as a function of acid and lactose concentration.
Initial Rate (M^-1 s^-1) [Lactose]o (M) [H+](M)
0.00116 0.01 0.001
0.00232 0.02 0.001
0.00464 0.01 0.004
Required:
Using this information, determine the rate law expression for the acid-based hydrolysis of lactose.
Answer:
Rate = 116m⁻¹s⁻¹[lactose][H]⁺
Explanation:
the formula for rate of reaction is given as
Rate = k[lactose]∧α[H]⁺∧β
we solve for the value of α and β
([lactose]₁/[lactose]₂)∧α
α = [tex]\frac{ln\frac{0.00116}{0.00232} }{ln\frac{0.01}{0.02} }[/tex]
when we divide this equation
α = [tex]\frac{ln0.5}{ln0.5}[/tex]
α = 1
we find β
R₁/R₂ = 0.01/0.02(0.001/0.001)∧β
0.00116/0.00232 = 0.5(1)∧β
β = 1
Rate = k[lactose]∧α[H]⁺∧β
we have to find the value for k
k = 0.00116/0.01(0.001)
k = 0.00116/0.00001
= 116m⁻¹s⁻¹
Rate = 116m⁻¹s⁻¹[lactose][H]⁺
What is the volume of the graduated cylinder below, write your answer to the proper number of significant digits and include the proper unit of measure.
Answer: 19.3
Explanation:
A two metal alloy is 85% iron by mass. How many grams of manganese are found in a 36 gram sample of the alloy?
Answer:
5.4g
Explanation:
Metal Alloy = Iron + Manganese
Composition of Iron = 85%
Mass of Alloy = 36 g
Mass of Iron = 85/100 * 36 = 30.6g
Mass of Manganese = Mass of Metal Alloy - Mass of Iron
Mass of Manganese = 36g - 30.6 g = 5.4g
The simpler compounds/elements in a synthesis reaction will be in the___ side of the chemical equation
Answer:
Reactants
Explanation:
Synthesis is where two simpler compounds or elements combine. The left side with the simple elements are the reactants and the complicated synthesized compound is the product side.
species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. which pf the following best explains this difference
A: Bacteria reproduce more rapidly, allowing species to evolve more quickly
B:Bacterial populations are more isolated, permitting increases in genetic variability
C:certain bacteria grow more steadily over time, giving an evolutionary advantage over mammals
D: Individual bacteria have the same genes, providing opportunities for increased biodiversity in one population.
Answer:A
Explanation:
Species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. Bacteria reproduce more rapidly, allowing species to evolve more quickly best explains this difference. Therefore, option A is correct.
What allows bacteria to evolve so quickly ?Bacterial species evolve quickly because of their large populations, which provide numerous opportunities for mutations, and because they readily exchange genetic information, even between species. Some of this genetic diversity influences drug sensitivity or resistance, providing material for Darwinian selection.
Bacteria are among the world's fastest reproducing organisms, doubling every 4 to 20 minutes. Some pathogenic strains of E. coli grow quickly.
Bacterial populations evolve antibiotic resistance so quickly due to their fast generation times, large population sizes, and unique gene acquisition methods. These are some of the reasons bacteria have been so successful in evolution.
Thus, option A is correct.
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If the percent yield for the following reaction is 65.0%, and 30.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq), are produced?
3 NO2(aq) + H2O(l) --> 2 HNO3 (aq) + NO (g)
Answer:
17.8 grams HNO₃
Explanation:
Given: 3NO₂(g) + 2H₂O(l) => 2HNO₃ + NO
30.0g/46g/mol 2/3(0.652mol)
= 0.652mol = 0.435mol (theoretical)
actual yield (65.0%) = 0.65(0.435mol) = 0.283mol(63g/mol) = 17.8 grams HNO₃
The solubility product for Zn(OH)2 is 3.0×10−16. The formation constant for the hydroxo complex, Zn(OH)2−4, is 4.6×1017. What is the minimum concentration of OH− required to dissolve 1.7×10−2 mol of Zn(OH)2 in a liter of solution?
Answer:
[tex][OH^-]= 1.12 \times 10^{-2} \ M[/tex]
Explanation:
[tex]\text{From the information given:}[/tex]
[tex]K_{sp} \ of \ Zn(OH)_2 \ is \ 3.0 \times 10^{-16}[/tex]
[tex]K_f \ of \ Zn(OH)_2 = 4.6 \times 10^{17}[/tex]
[tex]\mathtt{K_{sp} \ \ \ \ \ \ \ \ \mathtt{Zn(OH)_{2(s)}} \to Zn^{2+}_{(aq)} + 2OH^{-}_{(aq)} }[/tex]
[tex]\mathtt{K_{f} \ \ \ \ \ \ \ \ \mathtt{Zn^{2+}_{(aq)} } + 4OH^-_{(aq)} \to Zn(OH)^{2-}_{4}_{(aq)}}[/tex]
[tex]\mathtt{K \ \ \ \ \ \ \ \ \mathtt{{Zn(OH)_{2}_{(s)}}} + 2OH^{-}_{(aq)} \to Zn(OH)^{2-} _{4(aq) }}[/tex]
[tex]\text{To calculate the minimum concentration of OH}^{-}[/tex]
[tex]K = \dfrac{Zn(OH)^-_4}{[OH^-]^2} \\ \\[/tex]
[tex][OH^-]^2= \dfrac {0.017}{1.380 \times 10^2}[/tex]
[tex][OH^-]^2=1.232 \times 10^{-4}[/tex]
[tex][OH^-]= 1.12 \times 10^{-2} \ M[/tex]
The minimum concentration of OH- required to dissolve [tex]1.7\times10^-2\; mol[/tex] [tex]Zn(OH)_2[/tex] in a liter of solution is [tex]1.12 \times 10^-^2 \; M[/tex].
What is concentration?Concentration refers to the accumulation of a substance in a specific place.
The solubility equilibrium
[tex]ksp\;of\; Zn(OH)_2 = 3.0 \times 10^-^1^6\\kf \;of\; Zn(OH)_2 = 4.6 \times10^1^7[/tex]
Calculating the minimum concentration
[tex]k =\dfrac{Zn(OH)^-^4}{[OH^-]^2} \\\\[/tex]
[tex][OH^-]^2 = \dfrac{0.017}{1.380 \times 10^2} \\\\[OH^-]^2 = 1.232 \times 10^-^4\\[OH^-]^2 = 1.12 \times 10^-^2[/tex]
Thus, the minimum concentration of OH- required is [tex]1.12 \times 10^-^2 \; M[/tex]
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Each element is made of
A.many types of atoms
B.the periodic table
C.one type of atom
D.molecules
What type of reaction is H2+ O2 H2O
Answer:
Explanation:
For this reaction we have a Combination reaction. Balancing Strategies: For this reaction it is helpful to start by changing the coefficient in front of H2O and so that you have an even number of oxygen atoms.
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Answer:
It is a combination reaction.
Explanation:
In this reaction it is helpful to start by changing the coefficient in front of H2O and so that you have an even number of oxygen atoms.
Carbon dioxide contributes to atmospheric warming by
If you were to heat up a 1-kilogram rock and 1 kilogram of water, you would see that the rock both gains heat and loses heat faster than the water. If you allow them to cool down, which one will come back to room temperature faster?
Answer: If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water
Explanation:
Answer:
If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water.
Explanation:
edmentum/plato