Answer:
Density is a measure of how heavy something is compared to its size.
If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.
Density is a characteristic property of a substance and doesn’t depend on the amount of substance.
Explanation:
If you compared the weight of wood and an equal amount, or volume, of water the sample of wood would weigh less than the sample of water. This means that wood is less dense than water. Since wood is less dense than water, wood floats in water, no matter how big or small the piece of wood is.
A student might want to know why a boat made out of steel can float when steel is more dense than water. This is not an easy question and requires a different approach than what students have seen so far. We do not necessarily recommend the following explanation for 5th graders but here is the idea:
An object floats when it displaces a volume of water that has a mass equal to the mass of the object. So if a material like steel is shaped into a boat and made larger and larger, it will displace more and more water. When it is large enough to displace a volume of water that has a mass equal to the mass of the boat, the boat will float.
a noncovalent interaction between two molecules is known as
A non-covalent interactions between molecules are van der Waal's forces and hydrogen bonds.
What are non-covalent interactions?
Non-covalent interaction is an interaction which does not involve sharing of electrons and in this aspect it differs from covalent bond.It rather involves dispersed variations of electromagnetic interactions which are present between the molecules or within the molecule.
The energy released during the formation of these interactions is of the order of 1-5 kcal .They are classified as electrostatic, pi effects , van der waals forces and hydrophobic effects.
They are important in maintaining the three dimensional structure of large molecules such as proteins ,nucleic acids ,etc.They are also involved in biological processes . They heavily influence drug design process and design of materials.
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.
If the Moon orbited Earth twice as fast, how many high tides would occur in one day?
Four high tides would occur in one day, if the moon orbited Earth twice as fast.
What are high tides?The tide when the water is at its greatest elevation.
At the moment, high tides occur twice a day. So if the moon orbits the earth twice as fast, high tides will occur twice as many, which means four times a day.
High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.
The best-known effect of the moon is its gravitational pull on Earth's oceans, which results in two high tides and two low tides every day.
But if the moon were half the distance from Earth as it is now, the tides would be eight times higher.
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Where are halogens on the periodic table?
We are the family members and love to
react with potassium (K).
Who we are?
Answer:wth does this even mean
Explanation:
help me plsss yall??????
Answer:
First one answer is physical and other remaning chemical
Answer:
Hydrogen is a colorless, tasteless, and odorless gas.
physical
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Hydrogen is very combustible in the presence of oxygen.
chemical
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Hydrogen is very reactive with most elements.
chemical
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Hydrogen is the least dense of all elements.
physical
Methane (CH4) is a gas that is found in small quantities in Earth’s atmosphere. Which type of bonds does methane have, and why does one carbon atom bond with four hydrogen atoms? In three to five sentences, explain your answer in terms of valence electrons and electronegativity.
In methane, the covalent bond is present between one carbon and four hydrogen atoms.
What is methane?Methane is the simplest form of saturated hydrocarbons. Methane is an odorless gas as well as a colorless gas. It has one carbon and four hydrogen atoms which is why methane is also called a tetrahedral molecule.
CH₄ is the chemical formula of methane and is a non-toxic but flammable gas. From the tetrahedral structure of methane, we can see that a carbon atom is bonded to four hydrogen atoms.
One molecule of methane contains four covalent bonds. Each covalent bond is formed between the carbon and one hydrogen atom. The formation of a covalent bond between carbon and hydrogen is due to the small electronegativity difference between carbon and hydrogen.
In this way, carbon completes its octet and hydrogen completes its duplet. Therefore, the covalent bond is formed between one carbon atom bond with four hydrogen atoms in methane.
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What does the graph show about the rate of temperature change over time?
Answer:
The temperature is the same overtime.
Explanation:
Since the line on the graph is straight the temperature will be constant.
Answer pls ASAPPP 50 pointsss!!
Answer:
There should only be one chemical reaction, this is because toasting the bread is not only using heat, but you cannot untoast the bread, and also theres a reaction with the amino acids and sugar in bread when it's cooked. I hope this helps you! :)
Answer:
One
Explanation:
One Chemical changes-It was when he toasted the bread. The heat changed the bread so that it has the crust on the outside
Copy and complete the concept map using the following:
(Na, Fe, actinides, Hg, Cs, Alkali, Inner transition)
Answer:
a) Alkali
b) Na
c) Cs
d) Inner Transition
e) actinides
f) Fe
g) Hg
Explanation:
K, Na and Cs are all Alkali MetalsFe, Hg and Ag are all Transition Metalsactinides and lanthanides are known as the Inner Transition Metala thermometer used to measure the temperature of food must be accurate to what temperature?
Answer:Accuracy Thermometers used to measure the temperature of food need to be accurate to +/-2°F or +/-1°C. Thermometers used to measure air temperature in food storage equipment need to be accurate to +/-3°F or +/- 1.5°C. A hanging thermometer in a walk-in cooler is an example.
Explanation:
pls help!!! A kitten has a mass of 1582 g and accelerates at 1.7 m/s^2. What is the net force acting upon the kitten?
Write down all the givens from the problem.
Are all of the units in the form required to use the generic equation? If not, then show your conversion.
Write the generic equation (equation with variables only) for this problem. Do not add any spaces between letters or symbols.
Substitute your numbers into the generic equation. This is where you show your math work, step by step. Solve the problem
Enter the numeric portion (numbers only) of your answer here rounded to the nearest tenth.
Enter the numeric portion (numbers only) of your answer here rounded to the nearest tenth.
Answer:
2689.4
Explanation:
aluminum has a density of 2.70 g/cm^3, a sample with a volume of 50 cm^3 will have how much mass?
Answer:
135 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question
density = 2.70 g/cm³
volume = 50 cm³
We have
mass = 2.70 × 50 = 135
We have the final answer as
135 gHope this helps you
Please answer quickly
Answer:
a) II and III
is the correct
Drag the item from the item bank to its corresponding match.
These are the elements or compounds that enter into a chemical reaction.
drag an
These are the substance(s) formed in a chemical reaction.
drag an
These are the reactants in the chemical equation C6H1206 +602 --> 6CO2 + 6H20
drag an
These are the reactants in the chemical equation 6 CO2 + 6H2O --> C6H1206 + 6 02
drag and
These are the reactants in the chemical equation 2 H2 + 02 --> 2 H2O
These are the reactants in the chemical equation 2 H2O --> 2 H2 + O2
Answer:
These are the elements or compounds that enter into a chemical reaction: Reactants
These are the substance(s) formed in a chemical reaction: Products
These are the reactants in the chemical equation C6H1206 +602 --> 6CO2 + 6H20: C6H1206 and 602
These are the reactants in the chemical equation 6 CO2 + 6H2O --> C6H1206 + 6 02: 6 CO2 + 6H2O
These are the reactants in the chemical equation 2 H2 + 02 --> 2 H2O: 2H2 and O2
These are the reactants in the chemical equation 2 H2O --> 2 H2 + O2: 2H2O
what happens when chocolate get heated?
hope it helps
lol can some have helo me out its easy
1, 2 and 3
Answer:
1. A
2. C
3. C
Explanation:
1. there are single cell organisms
2. all others are abiotic factors
3. individual is just one, population is one species, community is all populations, ecosystem includes abiotic and biotic factors, biome is a large geographical area.
Which phrase describes the thermal energy of a sample of matter?
O A. The total kinetic energy of the particles of matter
B. The kinetic energy of the slowest particles of matter
O C. The average kinetic energy of the particles of matter
O D. The temperature of the fastest particles of matter
Answer:
O A. The total kinetic energy of the particles of matter
Explanation:
I got it right on assignment. (°ω°)
What does a
map
scale measure?
Answer:
Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.
Explanation:
For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.
ANSWER ASAP PLZ???????????????????????????????????
Answer:
The answer should be A
Explanation:
Answer:
Leaving a Copper penny in vinegar until it turns green
Explanation:
the others are physical changes. when copper penny is put in vinegar, a reactive oixde layer is formed which is green in colour. namely, Cu(II) acetate.
The green growing on the penny of copper and the rust forming on the nail of iron are chemical changes. Boiling away salt water, scraping iron filings from a mixture of sand with a magnet, and breaking a rock with a hammer, are physical changes.
in an oxidation-reduction reaction, how is the reducing agent changed?
Explanation: The additional terminology comes from the definition that, within redox processes, a reductant transfers electrons to an oxidant; hence, the reductant (reducing agent) loses electrons, so is oxidized, while the oxidant (oxidizing agent) gains electrons, so is reduced.
In an oxidation-reduction reaction, the reducing agent loses electrons and loses potential energy, Therefore, option (C) is correct.
What is a reducing agent?A substance that loses its electrons in a redox reaction to other substances and gets oxidized is called a reducing agent. A reducing agent is one of the reactants which reduces the other reactant by donating the electrons to the reactant of an oxidation-reduction reaction.
If the reducing agent can't pass electrons to another reactant in a reaction, then the reduction process does not occur and the reaction cannot proceed.
In redox reactions, when an electron loses potential energy as a result of the transfer and energy is released. Electrons with more potential energy are associated with less electronegative atoms and less potential energy is associated with a more electronegative atom (such as O).
Therefore, the reducing agent loses electrons and loses potential energy in a redox reaction.
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Your question is incomplete, but probably the complete question was,
In an oxidation-reduction reaction, how is the reducing agent changed?
(A) it gains electrons and gains potential energy
B) it gains electrons and loses potential energy
C) it loses electrons and loses potential energy
D) it loses electrons and gains potential energy
Someone pls help me I will make you brain
Answer:
false, true and i dk what the other answer choices are for the 3rd questions
Explanation:
how to calculate atomic mass of sodium ?(in process)
Answer:
Atomic mass of Sodium is 22.9897 u. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The unit of measure for mass is the atomic mass unit (amu). One atomic mass unit is equal to 1.66 x 10 -24 grams.
Explanation:
Which of the following properties is a chemical property?
Answer:
flammability, toxicity, acidity, reactivity are some examples.
sorry you left out your options.
Answer:
Where are the options
Explanation:
Can you be a little more specific about your question?
Which of the operations results in sublimation?
Answer:
hrjfnd
Explanation:
hfhdhfujduejdjdjdbfudbdjdbdifhdudjdufb
#no spams ,
ur answer will be reported if u do
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First State : Punjabsoil - Alluvial soil
crops - Cotton, wheat, sorghum, bajra, maize, barley, jute, tobacco, green and black gram, chickpea, pigeon pea, etc.
Suitable properties : Mix of sandy loam and clay soil. Quick draining in nature. Rich in humus (organic matter) and phosphoric acid
Second state : Maharashtrasoil - black soil
Crops - Cotton is the major crop. Other crops include wheat, cereals, rice, jowar, sugarcane, linseed,
Suitable properties : Black soils get sticky when fully wet. Rich in magnesium, iron, aluminum, and lime. They moisture excellently.
Third state : Orrisasoil - laterite soil
crops - wheat, rice, pulses, rubber, tea, coffee, coconut, and cashews.
suitable properties : These Soils are acidic in nature and coarse and crumbly in texture. it is also rich in iron content.
Fourth state : Rajasthansoil - Arid soil
crops - Barley, maize, wheat, millets, cotton, and pulses.
Suitable properties - Sandy soils with low clay content, Saline in nature. Rich in plant food. Poor in organic matter and moisture because arid regions are usually dry.
Fifth state : Sikkimsoil - Mountain and Forest Soil
Crops- Wheat, barley, maize, tea, coffee, spices, tropical and temperate fruits.
Suitable properties - Acidic soil, rich in organic matter. Poor in lime, phosphorus, and potash. Good fertilization is required in these soils.
Is there a relationship between atomie radius and electronegativity? Why or why not?
Answer:
Yes
Explanation:
Electronegativity is the tendency for atoms to keep electrons closer to them. So, if the atoms are smaller there, there is a stronger pull on the electrons to keep them closer. So, the larger the atom get, due to electron shielding, it become less electro negative. I hope this help. You might get a better explanation from Khan Academy's video on Electronegativity
Answer:
A relationship is intuitively expected
Does electronegativity relate to atomic radius? A relationship is intuitively expected between electronegativity and radius: the size of an atom is determined by the distribution of electrons around its nucleus. The closer the electrons are to the nucleus, the more tightly they are bound, thus increasing the electronegativity of the atom.
Explanation:
pls help ——————————
—————-
Answer:
X has 9 Electrons, 9 Protons and 10 Neutrons
X is Fluorine
Explanation:
19 in X is Nucleon number
So, if you minus 19 by 9 down there (which is proton number) you'll get 10 (Neutron number).
Now, Proton = Electron. That's why Electron is 9 too. I figured that X is Fluorine bcuz it has 9 Electrons. If you venture around in the periodic table, fluorine is the ninth element innit.
hope this helps ya ＼(^o^)／
DO the following conversion
Answer:
Kim Sam Mi Da!!
Explanation:
Da Mi Sam Kim!!
Earth science
Help plz!
Which piece of information could a person obtain from a contour map?
1.the mineral composition of a mountain
2. the elevation of a mountain 3.the speed of water flow in a river
4.the amount of water in a river
Answer:
2 Elevation of a mountain.
Explanation:
Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes.
(Brainiest and Thanks all Appreciated)
!! Help!! Which statement accurately describes malleability?
Answer:
B
Explanation:
Malleability describes a substance's ability to deform under pressure and heat
Examples: Gold, iron, aluminum, copper, silver, and lead. Gold and silver are highly malleable. When a piece of hot iron is hammered it takes the shape of a sheet.
