All matter has both physical and chemical properties. A physical property can be observed without changing the identity of the substance. Which is a physical property?
A. ability to rust
B. density
C. flammability
D. reactivity with the water
Explanation:
Density
Hope it helps :)
why do you divide 1 by 10???
Answer: 0.1
Explanation: because if you divide 1/10 gives you 0.1
Fluorine gas reacts with sodium bromide to form
Answer:
Fluorine gas reacts with a solution of sodium bromide in a single-replacement producing aqueous sodium fluoride and bromine gas
Explanation:
i honestly looked this up
A balloon with a mass of 5 grams is blown up and popped. If all the pieces are weighed what would be their total mass?
2.5 grams
5 grams
10 grams
7.5 gram
Answer:
5 grams
Explanation:
At room temperature, an element that is a brittle solid and a poor conductor of
heat and electricity could have an atomic number of
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Explanation:
Which statement describes the electron sharing between hydrogen and fluorine?
A. Hydrogen shares seven electrons, while fluorine shares one electron.
B. Hydrogen shares one electron, while fluorine shares seven electrons.
C. Hydrogen and fluorine share one electron with each other.
D. Hydrogen and fluorine share seven electrons with each other.
Answer:
C
Explanation:
Hydrogen has one electron in its outermost shell, while fluorine has seven electron in its outermost shell, hence both hydrogen and fluorine needs a single electron to complete its outermost shell. That's why there is a single bond between hydrogen and fluorine.
Both hydrogen and fluorine share one electron with each other for the completion of their outermost shell. So the correct option is C.
What is covalent bonding?
In chemistry, the interatomic linkage that can be formed between atoms of the same or different elements and is due to the sharing of an electron pair between two atoms is called a covalent bond.
The kind of bonding is the result of an electrostatic force of attraction of their nuclei for the same electrons so that they can complete their octet. When the bonded atoms have lower total energy than that of widely separated atoms, a covalent bond is formed m
The inorganic substances hydrogen, nitrogen, chlorine, water, and ammonia (H2, N2, Cl2, H2O, NH3) and also all the organic compounds are the molecules that have covalent bonding. In the case of structural representations of molecules, this type of bonding is indicated by solid lines that connect pairs of atoms.
Therefore the correct option is C.
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When writing a chemical equation, the number of atoms on the reactants do NOT need to equal the number of atoms on the products.
true
false
Answer:
False
Explanation:
When writing the chemical equation number of atoms on the reactant side must be equal to the number of atoms on right side because according to law of conservation of mass, mass can neither be created nor destroyed but change from one to another form, thus total mass remain same on both side of equation.
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
Are the rocks on the Northern island are older or younger than rocks on the Southern island?
Answer: I think the rocks in the Northern Islands are older than the rocks in the Southern Islands.
Explanation: Back whenever things were being discovered, people went into the south and started making homes, in the North, those were discovered many years later.
Which best explains why conservation of mass should be studied in a closed
system?
A. to prevent contamination of the products
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B. to prevent the loss of any reactants
c. to prevent the release of any gases produced
D. to prevent the absorption of heat from the outside
Answer: C
Explanation:
The option that best explains why conservation of mass should be studied in a closed system is to prevent the release of any gases produced.
The law of conservation of mass states that mass can neither be created nor destroyed in a reaction, but can be converted from one form to another during the course of the reaction.
A closed system is one that cannot exchange matter with its surrounding while an open system is free to exchange both matter and energy with its surrounding.
When a system is opened, gaseous reactants of products may be lost to the surroundings and the mass will not be conserved as a result.
However, in a closed system, gaseous reactants or products remain within the system and the mass of the system before and after the reaction remains constant.
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What is the speed of a rocket that traveled 1400 m in 11 seconds?
Answer:
The answer is 127.27 m/sExplanation:
The speed of the rocket can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
where
d is the distance
t is the time
From the question we have
[tex]v = \frac{1400}{11} \\ = 127.272727...[/tex]
We have the final answer as
127.27 m/sHope this helps you
Someone answer ASAP please
please help with this question
Answer:
physical
Explanation:
The number of protons plus the number of neutrons in an atom is equal to its
Uranium has the atomic number 92; its atoms contain 92 protons and 92 electrons. Each atom also has a mass number, denoted by the symbol A. The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains.
(hope this helps ^^)
PLEASE SOMEONE HELP ME
Answer:
32 atoms
Explanation:
An element with just is a letter is represented as 1 atom
An element with a number after it shows how many atoms (not one atom) is of that element.
I'm not sure if the (6)'s are trying throw you off.
An EMR photon is 0.01 m long what is it's frequency and what type of wave is it?
Answer: Electromagnetic radiation can act both as a wave or as a particle or photon. Electron radiation is released as photons or bundles of light energy that travel at the speed of light as waves. Therefore electromagnetic radiation can be described by wave theory, where it is represented by its speed, frequency and wavelength.
A cube of iron at 20. Degrees C is placed in contact with a cube of copper at 60 degrees C. Which statement describes the initial flow of heat between the cubes?
Answer:
D) Heat flows from the copper cube to the iron cube.
Explanation:
These are the options for the question
A) Heat does not flow between the cubes.
B) Heat flows in both directions between the cubes
C) Heat flows from the iron cube into the copper cube.
D) Heat flows from the copper cube to the iron cube.
From the knowledge of
second law of Thermodynamicss, which says heat moved from higher temperature to lower temperature region, and termal conduction,energy such as heat will only flow from higher temperature to lower temperature, which means the heat will move from higher concentration to lower Concentration. As the cube of copper at 60 degrees is heated the atoms beginnings to vibrate as it acquire energy then moves and flow to the lower temperature part.
Therefore, Heat flows from the copper cube to the iron cube.
if you were to take a Radio yo the moon, which of the followings souls corrector describes its change to its mass and weight?
A.Its mass and weigth would not change B. Its mass souls ingrese, and its wight would remain the same
C.Its Weight souls ingrese, and its mass would remain the same
D.Its weight would decrease, and its mass would remain the same
Answer:
its C.
Explanation:
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What happens when the lava “meets” the ocean? *
Answer:
Steam
Explanation:
When lava meets the sea it cools quickly while boiling the ocean into steam. The billowing steams clouds can be deadly as they contain small glass shards of fragmented lava and acid mist from sea water.
Which of the following is not a polyner glucose tryglicerides starch and dna
Answer:
Glucose
Explanation:
A polymer is a macromolecule composed of many repeating subunits.
Triglycerides are made of three fatty acids and glycerol, they are polymers of fatty acid molecule monomers.
DNA molecules are polymers of nucleotides.
Glucose is a monomer. When it polymerizes it forms starch or cellulose.
Therefore, the only option that is not a polymer is glucose.
Which of the following statements describes the difference
between a mixture and a pure substance?
A. A mixture tends to be homogeneous, while a pure
substance tends to be heterogeneous.
B. A mixture has a specific melting point, while the
melting point of a pure substance can vary.
C. The density of a mixture can change with temperature,
but the density of a pure substance cannot change.
D. The composition of a mixture can vary from sample to
sample, but the composition of a pure substance is
always the same.
Answer:
A.
Explanation:
I found the answer online when I was researching for it I hope I helped.
Which word is most similar in meaning to data?
A.effect
B.color
C.evidence
D.number
Evidence is most similar in meaning to data. Thus option C is correct.
what are the different types of data in research ?Different types of data describe the things after assigning value to it.
For analysis of data it is mandatory to organize, process, and present the information in a useful way.
Qualitative data presented in words and descriptions forms, we can only observe this data, harder to analyze in research.
For example, taste, experience, texture, or opinion are considered as qualitative data.
Quantitative data are those which can be measured and expressed in the form of numerical figure.
For example, age, rank, cost, length, weight, scores,
Categorical data represented in the form of groups. For example, In a field survey a person responding by answering the related questions of living style, marital status, smoking habit etc.
Thus option C is correct.
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A rock is found in an area that once had an active and has since been affected by erosion. The rock has individual black and white crystals that are easy to see. Which other description fits the rock?
Answer:
exposed to air and water
Explanation:
A rock found in an area that was active once and affected by erosion is a form of sedimentary rocks. Sedimentary rocks can be present in black and white crystals form.
The other description fits the sedimentary rocks is exposed to air and water. Sedimentary rocks are formed by the process of erosion and weathering that include the exposure of rocks to the wind and rain or water, that break down large pieces of rocks into smaller.
Hence, the correct answer is "exposed to air and water".
The other description of the rock is that it's cooled in the volcano. The type
of rock is known as the igneous rock.
Igneous rock is produced when the volcano erupts and is cooled near the
Earth's surface. We were told that the rock was affected by erosion which
took it deep into the soil and became inactive.
High temperature and pressure led to it erupting as a volcano which
explains why it has the black and white color due to heat exposure.
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a wave has a wavelength of 10m and a speed of 340m/s. what is the frequency of the wave?
Answer:
34m/s squared
Explanation:
if yo divide 340m/s by 10m you get 34 and then the m/s and m ad to make m/s squared
Help you could take your time and give a explanation that you didn’t guess
Molecules cannot change position in a ________.
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[tex]
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[/tex]
Answer:
pretty sure it’s a solid
Explanation:
What nuclear symbol can be represented by 40p, 52 n
An element (either a neutral atom or an ion) can be distinguished from any other element by 1. The number of electrons it has. 2. The number of protons it has. 3. The number of neutrons it has. 4. The combined number of protons and neutrons it has
Answer:
2. The number of protons it has
Explanation:
1. The number of electrons
This is incorrect because atoms and ions can have the same number of electrons from electron gain or loss
2. The number of protons it has
All atoms of an element have the same number of protons and every element has a different number of protons in its atoms. This is the correct option.
3. The number of neutrons it has
Examples includes carbon-12, nitrogen-13 and oxygen-14. They all have the same number of neutrons. This option is wrong
4. The combined number of protons and neutrons it has
Isobars are atoms that have the same mass number (proton and neutron). Examples are S-40, Cl-40, Ar-40 etc This option is wrong
PLEASE HELP RIGHT ANSWER GETS BRAINLIESS
Answer:
I think it would be digention but I can't see the full picture so if its wrong take a better picture that would encapture the entire question
Explanation:
can I get brainlist if it right thx
Many jobs have been replaced because of new blank
Answer:
technology.
Explanation:
Give an example of mechanical to mechanical energy
Answer:
A brick held at a vertical position above the ground or zero height position). A moving car possesses mechanical energy due to its motion (kinetic energy).
Explanation: