Ionic bonding typically occurs between a metal that loses electrons (such as sodium) and a nonmetal that gains electrons (like chlorine), forming a compound such as sodium chloride.
Ionic bonding often occurs between a metal and a nonmetal because of their tendencies to lose and gain electrons, respectively. Metals tend to lose electrons and become positively charged ions, while nonmetals tend to gain electrons and become negatively charged ions. An example of such an ionic bond is the bond between sodium (Na), a metal that easily loses one electron to form Na⁺, and chlorine (Cl), a nonmetal that readily gains an electron to form Cl⁻.
The resulting compound, sodium chloride (NaCl), or table salt, is a classic example of ionic bonding; it is held together by the electrostatic attraction between the positively charged sodium and the negatively charged chloride ions.
This bonding forms a crystalline lattice that is neutral overall but consists of ions with opposite charges that are strongly attracted to each other.
How many moles of lead, Pb, are in 1.50 x 1012 atoms of lead?
Answer:
2.49*10⁻¹² mol
Explanation:
Use Avogadro's Number for this equation (6.022*10²³). Divide Avogrado's by the number of atoms you have to find moles. You are answer should be 2.49*10⁻¹² mol.
Answer:
2.49*10⁻¹² mol
Explanation:
Use Avogadro's Number for this equation (6.022*10²³). Divide Avogrado's by the number of atoms you have to find moles. You are answer should be 2.49*10⁻¹² mol.
Plz let me know if it is correct.
What is one limitation of descriptive investigations?
They cannot show cause and effect.
They produce lots of data.
They can be done at a lower cost.
They follow procedures.
Answer:the answer is A. They cannot show cause and effect
Answer:
A
Explanation: I just did this on edgenuiity and got it right
Competition between two species occurs when
1. Mold grows on a tree that has fallen in the forest
2. Chipmunks and squirrels eat sunflower seeds in a garden
3. A crow feeds on the remains of a rabbit killed on the road
4. A lion stalks, kills, and eats an antelope
Final answer:
Interspecific competition happens when two species compete for the same limited resources, such as chipmunks and squirrels competing for sunflower seeds, with one species typically having a competitive advantage over the other.
Explanation:
Interspecific Competition
Competition between two species occurs when they are both striving for limited resources in the same area. An example of such competition might occur when chipmunks and squirrels compete for sunflower seeds in a garden. This is known as interspecific competition, which involves individuals of different species. In this competition, one of the species will typically be better adapted to the environment and will therefore have a competitive advantage over the other, resulting in greater reproductive success and survival. For instance, if squirrels are more effective at gathering sunflower seeds than chipmunks, the squirrels might have a higher survival rate, impacting the chipmunk population negatively.
In contrast, intraspecific competition occurs when members of the same species compete against each other for resources, such as two male deer clashing antlers to compete for mates. Both forms of competition are crucial factors in natural selection and can lead to the evolution of species-specific adaptations, also referred to as character displacement.
Kinetic molecular theory explains changes in _ ?
A) states of matter
B) polarity
C) electronegativity
D) potential energy
Answer:
A) States of matter
Explanation:
Hope this answer helps you
Final answer:
The kinetic molecular theory explains changes in states of matter, as it relates to the balance between particle motion (kinetic energy) and intermolecular forces influenced by temperature and pressure. Correct option is A.
Explanation:
The kinetic molecular theory explains changes in states of matter. It posits that matter is composed of tiny particles that are always in motion. The balance between the kinetic energy, which is related to the particle motion, and the intermolecular forces, which are attractive forces between particles, determines a substance's state. Temperature changes can alter the kinetic energy of particles, leading to state changes. Similarly, increasing pressure compacts molecules closer together, enhancing the intermolecular forces, and potentially causing a phase change.
how to make a milkshake?
Answer:
Strawberry? Peppermint fudge? Bananarama? Any flavor you like! Learn how to make milkshakes from scratch with our step-by-step guide (plus pretty pictures).
Milkshakes are one of the most iconic American desserts. They’re refreshingly cool, slurp-ably sweet and come in pretty much any flavor you can imagine. But you don’t need to belly up to a vinyl booth to enjoy one. Making a milkshake from scratch is simple. If you’ve got a tub of ice cream on hand, you’re halfway there. Follow along as our test kitchen shows how to make the most flavorful milkshake.
In the mood for more classic sweets? These vintage dessert recipes are making a comeback.
How to Make the Best Milkshake Ever
Ingredients
1/3 cup milk.
You can use 2%, whole milk, or a blend of milk and half-and-half.
1-1/2 cups ice cream
Vanilla makes a good base for most shakes, or you can use a flavor like chocolate.
Delicious mix-ins!
Think a swirl of chocolate syrup, peanut butter, a chopped banana or other fruit, a handful of chocolate or butterscotch chips (we could go on and on…)
A blender, of course.
You can use a classic stand blender-or an immersion blender if you want to make it right in your glass.
Instructions
Step 1: Add the Milk, Ice Cream and Mix-Ins
Learn how to make a milkshake
TASTE OF HOME
Send your ingredients straight to the blender. For best results, put in your milk first. That will get the blender mixing quickly. Be sure to let your ice cream soften before scooping. If it’s too hard, you might end up having to add more milk, which thins the shake.
Test Kitchen tip: For an ultra-rich shake, use whole milk or milk with a little half-and-half cream. But never use heavy cream. If you send that through the blender, it’ll create little bits of butter.
We’re going to make a strawberry shake, so we’ll add 1/2 cup frozen unsweetened strawberries and 1 tablespoon strawberry preserves.
Editor’s tip: Remember that any ingredients you add will soon be pulverized in the blender. If you want to keep the size and shape of mix-ins like sprinkles, cherries or chocolate chips, it’s best to reserve as a garnish.
Step 2: Blend ’til smooth
Ice cream, milk and strawberries in a blender
It’s time to blend away. You’ll want to keep an eye on the consistency. This recipe creates a Goldilocks-style shake: not too firm and not too soft (runny). Of course, you can always customize it either way. Use less milk for a thicker, spoonable shake; more for a thinner, sippable one.
Be sure to check our our Test Kitchen’s recommendation for the best blender for your milkshake.
Step 3: Pour and Enjoy!
Strawberry milkshake in a glass with a green striped straw sticking out
Pour your milkshake into a chilled glass to serve. It tastes great straight-up or topped with a tower of whipped cream. Feeling fancy? Layer on toppings like chocolate syrup, sugary cereal or rainbow sprinkles. Once you’ve mastered the classic garnishes, try these crazy takes!
Answer:
Explanation:
4 large scoops of whatever flavor icecream you want
1/4 cup of milk
in the blender blend all together
pour into a glass
add whip cream sprinkles and a cherry
pls mark me brainliest
What is the hydroxide ion concentration of a solution whose pOH is 6.42?
Your answer:
3.8 x 10-7M
2.6 x 10-7M
2.6 x 10-8 M
3.8 x 10-8 M
Answer : The hydroxide ion concentration of a solution is, [tex]3.8\times 10^{-7}M[/tex]
Explanation :
As we know that:
pH : It is defined as the negative logarithm of hydrogen ion concentration.
Mathematically,
[tex]pH=-\log [H^+][/tex]
Similarly,
pOH : It is defined as the negative logarithm of hydroxide ion concentration.
Mathematically,
[tex]pOH=-\log [OH^-][/tex]
Given:
pOH = 6.42
[tex]6.42=-\log [OH^-][/tex]
[tex][OH^-]=3.8\times 10^{-7}M[/tex]
Therefore, the hydroxide ion concentration of a solution is, [tex]3.8\times 10^{-7}M[/tex]
If a parent cell has 23 chromosomes and reproduces asexually through mitosis,how many chromosomes will each of its daughter cells have?
Answer:
Im pretty sure it would be 23
Explanation:
If it divide asexually it would be identical
__________ are composed of two or more covalently bonded atoms.
A. Elements
B. Molecules
Answer:
i think it is molecules.
Explanation:
Please help! What is the molarity of 450 mL of solution containing 15 g NaCl?
Answer:
The answer to your question is 0.6 M
Explanation:
Data
Molarity = ?
Volume = 450 ml
mass of NaCl = 15 g
Process
1.- Calculate the molar mass of NaCl
NaCl = 23 + 35.5 = 58.5 g
2.- Calculate the number of moles of NaCl
58.5 g of NaCl ------------ 1mol
15 g of NaCl ------------ x
x = (15 x 1)/58.5
x = 0.26 moles
3.- Calculate the molarity
Molarity = moles/volume
-Substitutiion
Molarity = 0.26/0.45l
-Result
Molarity = 0.6 M
The molarity of a 450 mL solution containing 15g NaCl is calculated by converting the mass of NaCl to moles, converting the volume of the solution to liters, and applying the molarity formula. The molarity is thus found to be approximately 0.57 M.
Explanation:To determine the molarity of the solution, we will need to apply the formula for molarity which is the number of moles of solute per liter of solution. Let's follow these steps:
Convert from grams to moles of NaCl using the molar mass of NaCl which is approximately 58.44 g/mol. Hence, 15g of NaCl is about 0.256 mol NaCl.Next, we convert the volume of the solution from milliliters to liters. 450 mL is equal to 0.45 L.Finally, we apply the formula for molarity. Using the values calculated, we find the molarity to be M= 0.256 mol / 0.45 L which equals 0.57 M.Learn more about Molarity here:https://brainly.com/question/8732513
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di SuLSU
3. Which statement best describes why algae can be a beneficial pioneer species?
O A. Algae gain energy from photosynthesis and provide competition for other organisms.
O B. Algae can grow in extreme conditions and provide food for many different organisms.
O C. Algae can use up suspended oxygen and can change the color of the water.
O D. Algae can grow very rapidly in nutrient-rich environments and block sunlight.
Answer:
B. Algae can grow in extreme conditions and provide food for many different organisms.
Explanation:
pioneer species are harden species that are first to colonize a barren environment or previously existing ecosystem that has been disrupted by earth natural phenomenon like volcanism etc.
Pioneer species are the first to colonize an ecosystem that has been previously damaged or disturbed because of there ability to grow in extreme condition. Example is the colonization of an environment that has been formed from lava flow . This species can withstand a disturbed or damaged habitat. Examples of pioneer species are lichen, Algae etc.
The pioneer species are photosynthetic as the new habitat will have limited nutrient and largely expose to light energy to hasten photosynthesis. This organism when they die will provide the organic material for further higher level of colonization. Further more the mode of reproduction is usually asexual for most of these organisms.
Match the type of compound with its naming system. Not all choices will be used.
___________1. Stock System
___________2. Uses several different suffixes, depending on the types of ions involved
___________3. Greek Prefix System
___________4. Contains the prefix hydro- and the suffix- ic.
___________5. Named after the two ions involved and uses the suffix -ide
a) Binary covalent compound
b) Binary ionic compound
c) Polyatomic ionic compound
d) Ionic compound with multiple oxidation states
e) Hydrate
f) Binary acid
g) Ternary acid
NEEDS TO BE DONE WITHIN 1 HOUR???
The Stock System is used for naming ionic compounds with multiple oxidation states, different suffixes are used for polyatomic ionic compounds, the Greek Prefix System is used for binary covalent compounds, the prefix hydro- and the suffix-ic are used for binary acids, and binary ionic compounds are named after the two ions involved and use the suffix -ide.
Explanation:1. Stock System: This is a method used to name ionic compounds with multiple oxidation states (d). For example, Iron (II) Chloride and Iron (III) Chloride.
2. Uses several different suffixes, depending on the types of ions involved: This points to a polyatomic ionic compound (c) which uses many suffixes such as -ate, -ite.
3. Greek Prefix System: This system is applied predominantly to name binary covalent compounds (a). For example, CO is called Carbon monoxide.
4. Contains the prefix hydro- and the suffix- ic: This rule is used to name binary acids (f). For instance, HCl in aqueous solution is called Hydrochloric acid.
5. Named after the two ions involved and uses the suffix -ide: This rule corresponds to the naming of binary ionic compounds (b). An example is NaCl, named Sodium Chloride.
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If the pressure, volume, and the number of moles of a gas are known, which is needed to calculate the universal gas consta
from the ideal gas law?
the temperature of the gas
the molar volume of the gas
the molar mass of the gas
the partial pressure of the gas
Answer:the temperature of the gas
Explanation:
what is the pupeese for a stage on microscope
Answer and Explanation:
The stage of a microscope is where the slide holding the specimen will be placed. Such a platform is required so that the viewer can more easily zoom into the organism and observe the slide through the microscope. Without the stage, it is very possible that the slide will be too far away to properly see anything.
Hope this helps!
Test your knowledge of water's ability to dissolve
substances by matching the following statements
with the correct answers,
when water breaks apart an ionic compound into
cations and anions:
when water surrounds substances that have been
"broken apart":
when water breaks down substances and
surrounds individual molecules or particles
Water readily dissociates ionic compounds, dissolves covalent molecules, and hydrates the smaller particles.
Explanation:
In water the following process undergoes to show water's ability to dissolve substances.
Dissociation is the process in which an ionic compound breaks into cations and anions
Hydration is the process in which water surrounds the broken cations and anions.
In Dissolving process elements in water breaks down and surrounds respective individual molecules or particles.
Water readily dissociates ionic compounds, dissolves covalent molecules, and hydrates the smaller particles. This is most likely because of the strong attractive forces between water and solute particles as water is a polar molecule.
25.34/5.98 = ?, what is the answer reported to the correct number of significant figures?
Answer:
25.34/5.98 =
4.23745819398
4.24
The significant figures is 4
The correct no of significant is 1
Explanation:
Significant figures are all numbers that add to the meaning of the overall value of the number. To prevent repeating figures that aren't significant, numbers are often rounded. One must be careful not to lose precision when rounding. Many times rounding numbers are for the purpose of simplicity only. Use the rounding calculator to assist in such problems.
Predict the polarity of 6 real molecules. First, draw the molecules and any bond dipoles. Then draw any molecular dipoles. Explain your reasoning before you check your predictions with the simulation.
The polarity of a molecule like O3 or NH3 is determined by its molecular geometry and the electronegativity of its atoms. O3 with its bent shape has a molecular dipole, and NH3 has a molecular dipole pointing from H towards the more electronegative N.
Predicting the polarity of molecules involves understanding their molecular geometry, electronegativity of atoms, and bond dipoles. For O3 (ozone), the molecule has a bent geometry, resulting in an overall molecular dipole due to the uneven distribution of electron density. The bond dipoles do not cancel each other out because of this bent structure.
In NH3, the nitrogen atom is more electronegative than the hydrogen atoms, resulting in bond dipoles pointing towards nitrogen. The geometry of NH3 is trigonal pyramidal, which means the bond dipoles do not cancel, and there is an overall molecular dipole pointing away from the hydrogens and towards the nitrogen.
By using the molecule polarity simulation, one can visualize these molecular structures and confirm the direction of dipoles. Remember to always draw the Lewis structure and use VSEPR theory to determine the molecule's geometry before predicting its polarity.
At what temperature will 41.6 grams N, exert a pressure of 815 mmHg in a
20.0L cylinder?
Hint: You must convert 41.6 g into moles FIRST, then use Ideal gas law to solve
for temperature.
134K
O 238 K
O 337 K.
O 176K
None of the given options are correct, and the correct answer is 174 K.
Explanation:
Mass of N = 41.6 g
Moles = [tex]$\frac{given mass}{molar mass}[/tex]
= [tex]$\frac{41.6 g}{28 g/ mol}[/tex] = 1.5 moles
Pressure, P = 815 mm Hg = 1.07 atm
Volume, V = 20 L
R = gas constant = 0.08205 L atm mol⁻¹ K⁻¹
Temperature, T = ? K
We have to use the ideal gas equation,
PV = nRT
by rearranging the equation, so that the equation becomes,
T = [tex]$\frac{PV}{nR}[/tex]
Plugin the above values, we will get,
T = [tex]$\frac{1.07 \times 20}{1.5 \times 0.08205}[/tex]
= 174 K
So the temperature of the nitrogen gas is 174 K.
Final answer:
The temperature at which 41.6 grams of nitrogen exert a pressure of 815 mmHg in a 20.0L cylinder is calculated using the ideal gas law and is approximately 177 Kelvin.
Explanation:
To find the temperature at which 41.6 grams of nitrogen (N₂) will exert a pressure of 815 mmHg in a 20.0L cylinder, we need to use the ideal gas law, which is PV = nRT.
First, we convert the mass of nitrogen to moles. The molar mass of N₂ is 28.02 g/mol, so:
moles of N₂ = 41.6 g ÷ 28.02 g/mol = 1.484 moles of N₂
Using the ideal gas law:
R = 62.36 L mmHg / (mol·K)
We have:
PV = nRT
(815 mmHg)(20.0 L) = (1.484 mol)(62.36 L mmHg / mol·K)T
T = (815 mmHg × 20.0 L) / (1.484 mol × 62.36 L mmHg / mol·K)
T = 16370 mmHg·L / (92.48104 mol·L mmHg / mol·K)
T = 177 K (rounded to 3 significant figures)
The temperature at which 41.6 grams of nitrogen will exert a pressure of 815 mmHg in a 20.0L cylinder is approximately 177 Kelvin.
Given the balanced equation 2C4H10 + 13O2 → 8CO2 + 10H2O, how many moles of CO2 are produced when 14.9g of O2 are used?
Answer: The number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.
Explanation : Given,
Mass of [tex]O_2[/tex] = 14.9 g
Molar mass of [tex]O_2[/tex] = 32 g/mol
First we have to calculate the moles of [tex]O_2[/tex]
[tex]\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}[/tex]
[tex]\text{Moles of }O_2=\frac{14.9g}{32g/mol}=0.466mol[/tex]
Now we have to calculate the moles of [tex]CO_2[/tex]
The balanced chemical equation is:
[tex]2C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2[/tex]
From the reaction, we conclude that
As, 13 mole of [tex]O_2[/tex] react to give 8 moles of [tex]CO_2[/tex]
So, 0.466 mole of [tex]O_2[/tex] react to give [tex]\frac{8}{13}\times 0.466=0.287[/tex] mole of [tex]CO_2[/tex]
Therefore, the number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.
What is the volume of 15.2 grams of SO2 at STP?
5.33 Liters is the volume of 15.2 grams of SO2 at STP.
Explanation:
If the mass of the gas, then you can divide the mass by the molecular weight of the gas molecules to get the number of moles. Then multiply this by 22.4 Liters / mole to get the volume.
PV = nRT => The Ideal Gas Law.
Each unit occurs three times and the cube root yields L-atm / mol-K, the correct units for R when used in a gas law context.
PV / nT = R. or PV = nRT.
R is called the gas constant.
PV = nRT => V = nRT/P
n = moles SO₂ = 15.2g/64g·mol⁻¹ = 0.238 mole
R = Gas Constant = 0.08206 L·atm/mol·K
T = Kelvin Temp = 273K at STP
P = pressure in atmospheres = 1.0 atm at STP
∴ V = (0.238mol)(0.08206 L·atm/mol·K)(273K)/(1.0atm)
=> 5.33 Liters SO₂.
What is the total charge of an ionic compound
Answer:
Zero
Explanation:a ionic compound consists of an equal number or positive and negative ions
An object has a total mechanical energy of 150 J. At point A, the object has a kinetic energy
of 30 J and has a potential energy of 120 J. At point B, what is the kinetic energy of the object if
its potential energy is 90 J?
Answer:
60 J
Explanation:
The law of conservation of energy states that energy is neither created nor destroyed, just converted into different forms. This means the total mechanical energy of the object at point A will be the same as the total mechanical energy at point B, and the question tells us the total of that mechanical energy is 150 J. Note we are assuming no energy is lost from the system as heat.
At point B, if the potential energy is 90 J, the remainder of the 150 J total must be kinetic energy. KE = 150 J - 90 J = 60 J.
The kinetic energy of the object at point B is 60 J. This is calculated by subtracting the potential energy at point B from the total mechanical energy, because total mechanical energy, the sum of kinetic and potential energy, remains conserved.
Explanation:This question deals with the concept of mechanical energy, which in physics is the sum of kinetic energy and potential energy. In this case, the total mechanical energy of the object is given as 150 Joules. At point A, the kinetic energy is 30 J and the potential energy is 120 J, adding up to the total mechanical energy.
At point B, the potential energy is stated to be 90 J. Because the total mechanical energy is conserved (i.e. it does not change between point A and point B), we can subtract the potential energy at point B from the total mechanical energy to find the kinetic energy at point B.
So, the kinetic energy at point B can be calculated using the equation: Kinetic energy = Total mechanical energy - Potential energy = 150 J - 90 J = 60 J.
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A 1.5 mol sample of radon gas has a volume of 21.0L at 33°C.
What is the pressure of the gas?
A) 37.7 atm B) 1.8°C C) 1.8K D) 1.8 atm
Answer:
The correct answer is D) 1.8 atm.
Explanation:
We use the ideal gas formula (PV= nRT). We first convert the unit of temperature in degrees Celsius to Kelvin. We use the ideal gas constant R = 0.082 l atm / K mol. We solve P:
273K =0°C ---> 33°C= 273 + 33=306 K
PV= nRT ----> P =(nRT)/ V
P= ( 1,5 mol x 0.082 l atm / K mol x 306 K)/ 21,0 L
P= 1,79 atm
one mole of an ideal gas
occupies a volume of 22.4
liters at
Answer : One mole of an ideal gas occupies a volume of 22.4 liters at STP.
Explanation :
As we know that 1 mole of substance occupies 22.4 liter volume of gas at STP conditions.
STP stands for standard temperature and pressure condition.
At STP, pressure is 1 atm and temperature is 273 K.
By using STP conditions, we get the volume of 22.47 liter.
Hnece, the one mole of an ideal gas occupies a volume of 22.4 liters at STP.
Which statement best describes a physical change?
A)Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.
B)Changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same.
C)Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.
D)Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.
Answer:
The answer is c
Which color of the visible spectrum has the shortest wavelength?
1violet
2blue
3yellow
4red
Answer:
violet
Explanation:
Violet has the shortest wavelength at 380 nanometers
The correct option is 1 i.e, Violet light has the shortest wavelength in the visible spectrum at approximately 380-450 nm and carries the most energy. Red light has the longest wavelength, about 620-750 nm, and the least energy.
The visible light spectrum consists of a range of colors that our eyes perceive as different wavelengths. Of these colors, violet light has the shortest wavelength, approximately 380-450 nanometers (nm). Because it has the shortest wavelength, violet light also carries the most energy. On the other end of the spectrum, red light has the longest wavelength, about 620-750 nm, and thus carries the least energy. To remember the order of colors from longest to shortest wavelength, you can use the mnemonic ROY G BIV, which stands for Red, Orange, Yellow, Green, Blue, Indigo, and Violet.
How can chloroform dissolve in water? Include information about molecular shape and polarity.
Answer:
You can dissolve about 1g of chloroform in a 100g of water; slightly less if the water is hot. This would not generally be considered 'soluble', but it's not entirely negligible either, depending on your purposes. chloroform is insoluble in water since it does not have any hydrophillic groups.
hope this helps you uwu
Evaporation is a process that requires energy to occur. Evaporation is ain)
reaction
Answer:
endergonic reaction.
Explanation:
an endergonic reaction requires energy to be driven.
16. Circle the letter of each chemical equation that is balanced.
a. H2 + O2 + H2O
b. Mg + O2 + Mgo
c. Na + O2 → Na20
d. 2 H2O2 → 2 H2O + O2
(How are you posted to know help please I don't get it...)
Answer:
d
Explanation:
a) This is not an equation.
b) This is not an equation.
c) The reactant side has 1 Na and 2 O while the product side has 2 Na and 2 O, therefore it is not balanced
d) The reactant side has 4 H and 4 O and the product side has 4 H and 4 O, therefore it is balanced.
1. Living things
are
with each other
and the
environment.
Living things are interdependent with each other and the environment.
Explanation:
Living things to grow, thrive, survive and reproduce are interdependent on each other and their surrounding environment. They depend on each other and the environment for basic requirements which support life like water, air, food etc.
The food cycle starting with the producers, consumers, decomposers and their interdependence with each other for energy production is a clear example for this. They are dependent on each other for reproduction and growth. They are dependent on the environment for living in their habitat and for raw materials for producing food.
Scientists hypothesize that early whale ancestors were amphibious. Which statement below is most consistent with this hypothesis? The fossil animals
Answer:
Yes, this hypothesis is true. The ancestor of whale belongs to amphibians.
Explanation:
Amphibians are those organisms which has the ability to live both on land and water. Wales are evolved from land animals such as ungulates. Ungulates are those organisms which belongs to mammals and having hooves. For example, deer, cow, horse and zebra etc. The ancestor of whale lives on land 50 million years ago. So the hypothesis is true.
Answer:had four legs of equal length
Explanation: