Answer:
Because to them it was just a little bit of fiction. so they don't really think it's necessary to do experiments or make detailed observation
Explanation:
it's just like how we presently today discuss about robot talking to us like humans but it's not yet come to pass .
In what condition do iodine and phosphorus react?
Answer:
reaction of phosphorus with the helegones
The periodic table below shows major regions in different colors. Which answer choice describes the noble gases?
A. All of the elements of Period 1 in orange boxes
B. The two separate rows of elements in dark and light blue boxes at the bottom
C. All of the elements in green boxes
D. All of the elements of Group 18 in orange boxes
Answer:
D. all of the elements of Group 18 in orange boxes
Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?(1 point)
three metallic bonds
two ionic bonds
four covalent bonds
one covalent bond
Answer:
four covalent bonds
Explanation:
Answer: four covalent bonds
Explanation:
To express very large or very small numbers, scientists use what
if the element A have three protons in the nucleus. find the atomic number of the element A
Answer:
ATOMIC number of element A is 3
Explanation:
Atomic number is the same as number of protons of an element.
according to the periodic table, Lithium is the element with 3 protons in its neutral state and it's atomic number is 3.
What net force is required to acceleterate car at a rate of 2 m/s² if the car has a mass of 3,000 kg
Answer:
6000N
Explanation:
Force = Mass x Acceleration
= 3000 x 2
= 6000 kg m/s^2 or 6000N
Answer:
[tex]\boxed {\boxed {\sf 6000 \ Newtons}}[/tex]
Explanation:
We are asked to calculate a net force. According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F= m \times a[/tex]
The mass of the car is 3,000 kilograms and the acceleration is 2 meters per second squared.
m= 3000 kg a= 2 m/s²Substitute the values into the formula.
[tex]F= 3000 \ kg * 2 \ m/s^2[/tex]
Multiply.
[tex]F= 6000 \ kg * m/s^2[/tex]
Convert the units. 1 kilogram meter per second squared is equal to 1 Newton. Our answer of 6000 kilogram meters per second squared is equal to 6000 Newtons.
[tex]F= 6000 \ N[/tex]
The net force required to accelerate a 3,000 kilogram car at 2 meters per second squared is 6000 Newtons.
will mark brainliest if correct
Which methods separate a mixture according to the size of the particles?
a
filtration and chromatography
b
distillation and chromatography
c
filtration and evaporation
d
distillation and evaporation
Answer:
filtration and chromatography
Explanation:
I hope this will help you :-)
600mL of a gas at 27◦C and 1atm pressure is heated to 177◦C. What pressure Must be applied to the gas in order to maintain the same volume?
Answer:
gkfbhs DC hdshgagfzh
What can we say about
protons?
A. They are in the nucleus and never
leave.
B. They move around outside the nucleus.
C. They move in and out of the nucleus.
Answer:
A. They are in the nucleus and never leave.
Explanation:
Protons as well as neutrons are located in the nucleus of the atom.
hope this helps!
plss help :(((
What volume is indicated on each of the graduated cylinders below? The unit of volume is mL. Make sure to check the units of graduation to get the most accurate reading possible
Answer:
Explanation: The total volume (rock plus water) in the graduated cylinder is 34 mL. We know the volume of water in the cylinder was 20 mL. Therefore, the volume of the rock must be 14 mL. Because a milliliter is exactly the same volume as a cubic centimeter, the volume of the rock is 14 cm3.
Explanation:
Image result for The unit of volume is mL. Make sure to check the units of graduation to get the most accurate reading possible
Graduated cylinders have numbers on the side that help you determine the volume. Volume is measured in units called liters or fractions of liters called milliliters (ml).
Which of the following statements is not true about ecosystems?
a. A healthy ecosystem can support an unlimited number of life forms.
b. Predators play a role in balancing the earth's ecosystems.
c. People's activities can improve the health of an ecosystem.
d. The parts of an ecosystem depend on each other.
Answer:
A
Explanation:
though an ecosystem can support life forms,when they become over populated or unlimited there will be competition for food,Shelta and other basic necessities which will lead to many of these life forms dying
The scientific method is
cyclic
linear
Chemical name of my atom
Answer:
dd
Explanation:
dddddddddddddddddddddddddddddddddddddd
Convert to standard notation.
9.3 x 10^-5
Answer:
9.3 x 10^ -5 in standard notation is 0.000093
Explanation:
Since 10 is raised to a -5, this means that there should be 5 zeros before the non-zero digits
calculate the mass of 2×10^25 molecules of water?
Answer:
36.04g H2O
Explanation:
2 moles H2O converted into grams using the mass of a mole of water as grams (1.01 x 2 + 16.00 = 18.02g = 1 mole h2o) is 36.04g
i can try to explain further if you want?
necesito ayuda con esto y si es necesario con procedimientos, gracias
Answer:
sorry but I don't understand Spanish
otherwise I will definitely helps you
I don't understand Spanish but you can do this :)
in which sell duplet rule is applied, why?
Answer:
its in explanationExplanation:
the tendency for items have 2 electrons in their outermost shell by interacting with others items through electron sharing or transfer is known as duplet rule. if an atom has 2 electrons in it's outermost shell then it is called duplet rule and if a 8 electrons in it's outermost shell than it is called octet rule .
4.4 x 10^-9
What’s this in standard form or scientific notation
Answer:
How to Convert a Number to Standard Form
Move the decimal point in your number until there is only one non-zero digit to the left of the decimal point. ...
Count how many places you moved the decimal point. ...
Write your scientific notation number as a x 10b and read it as "a times 10 to the power of b."
Explanation:
A dehydration reaction (or condensation reaction) is the process in which _____. See Concept 5.1 (Page) View Available Hint(s)for Part A water molecules are produced as a polymer is formed from monomers the bonds between the individual monomers of a polymer are broken by the addition of water molecules water molecules are attracted to each other water molecules are used as a source of raw material to break down polymers to monomers None of the choices is correct.
A dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.
A chemical reaction is the process by which substances called reactants are transformed to another substance known as products through the breaking up or building up of bonds between the reactants.
There are different types of chemicals reaction which includes condensation reaction.
Condensation reaction involves the combination of two smaller molecules known as monomers to for one larger molecule known as polymer with the loss of water molecule.
Condensation reaction is specifically called dehydration reaction due to the loss of water molecule that is involved.
Therefore, a dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.
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Removing the pulp (solid) from the orange juice using a juice strainer.
a chemical change
b Physical change
Taking into account the definition of physical change and chemical change, the correct option is option b. removing the pulp (solid) from the orange juice using a juice strainer is a physical change.
Two types of changes can be distinguished: physical changes and chemical changes.
A physical change is a change that makes something different without changing the composition of the material.
In other word, a physical change is a transformation in which the nature (composition) of matter does not change, so that the substances involved are the same before and after the change.
On the other hand, chemical changes are considered to be those in which the substances involved are transformed into totally different ones.
In other words, chemical changes refer to the process that involves one or more substances that become new substances with different nature and properties.
In this case, removing the pulp (solid) from the orange juice using a juice strainer is a physical change because the pulp and the orange juice are the same before and after the change and their properties do not change.
In summary, the correct option is option b. a physical change.
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brainly.com/question/14537837?referrer=searchResults brainly.com/question/19134005?referrer=searchResultsAn _____
is an explanation of data that is based on facts
Answer:
Theory.
Explanation:
It is called a theory.
Flowing water eroding a limestone riverbed
a
Chemical Change
b
Physical Change
Answer:
physical change
I hope it's helps you
What should a prepositional phrase include after the preposition?
A.a noun and its modifiers
B.an adjective and an adverb
C.a subject and a predicate
D.an object and its modifiers
Answer:
B
Explanation:
A prepositional phrase should include after the preposition an object and its modifiers. The correct option is D.
What are prepositional phrases?A prepositional phrase is a group of words that contain a preposition with its object and the words that modify it. These are the words that change verbs and nouns.
For example, Mansi is going out with handsome Brian. Brian is the object and the beautiful is the prepositional phrase. The three types of prepositional phrases are:
Adverb prepositional phrases.Adjective prepositional phrases.Prepositional phrases, behave as nouns.If there are two prepositional phrases used in one sentence. The other prepositional phrase will be used as an adverb.
Thus, the correct option is D. an object and its modifiers.
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What makes modern chemistry different from alchemy and other ancient chemical practices of pre-modern humans?
Answer:
Alchemy was based more on experimentation and had little basis in science. Chemistry utilizes both experimentation and scientific practices. Modern chemistry basically relies on scientific theories and experimental results, but the alchemy was a blend of myths, religion, magic, astrology, philosophy, and spirituality.
Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?
three metallic bonds
two ionic bonds
four covalent bonds
one covalent bond
Four covalent bonds are formed as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA.
The periodic table is composed of eighteen groups and eight periods. The common thread that holds all the elements in a group is that they all have the same number of valence electrons in their atoms. The elements in the same period all have the same highest energy level.
Oxygen in group Group VIA has six valence electrons while carbon in group Group IVA has four valence electrons. Hence, the chemical bond in carbon dioxide CO2 must contain four covalent bonds as shown in the image attached to this answer.
https://brainly.com/question/13178080
Answer:
Four Covalent bonds
Explanation:
The slope of the line represents a quantity called density. If rise represents the y-axis and run
represents the x-axis, what is the formula for density?
Answer:
Density equals Mass over Volume
Explanation:
D=m/v
what is the hydrogen ion concentration of oven cleaner?
Answer:
Bases are substances that dissolve in water to release hydroxide ions ... Chalk and oven cleaner are examples of familiar products that contain bases
How to convert 104 Km to M
Answer:
m=104000
Explanation:
by 1km=1000m
104km=?
Now
104km=104×1000m
=104000m
Therefore,m=104000 ans
104 kilometers is equal to 104,000 meters.
A conversion factor is a ratio that shows how two different units of measurement relate to each other. You can convert a value from one unit to another by multiplying or dividing the original value by a conversion factor.
For example,
Since there are 1000 meters in a kilometer, we need to multiply the distance in kilometers by 1000 to convert it into meters.
So, to convert 104 kilometers to meters:
104 Km * 1000 = 104,000 meters
Therefore, 104 kilometers is equal to 104,000 meters.
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Which of these are PHYSICAL changes?
А.
cutting, tearing, freezing, thawing, folding.
mixing without chemical changes
B.
burning, rusting, forming a new substance from
two different substances, exploding, cooking
Answer:
the answer to this problem is a
Explain the geometry of PCl5 molecule and account for its high reactivity
Answer:
In PCl5, in addition to equitorial bonds which lie in the same plane ,there are axial bonds. Since it suffers more repulsion it is longer than the other bonds. Also these are weak bondsand therefore these bonds can break easily . Because of these reasons,PCl5 is very reactive.