Answer:
a molecule is a group of atoms/elements bonded together
write short notes on the following:1. Analytical chemist 2. Chemical engineer 3. Healthcare scientists 4. Forensic scientist 5. Research scientist 6. Toxicologists 7. Pharmaceutical chemist 8. Nuclear chemist 9. Industrial chemist.
What is the speed of an object that travels 20 meters in 5
Answer:
5 what
Explanation:
not enough information
Which grouping shows a decrease in Intermolecular
Forces of Attraction?
A) gas, liquid, solid B) liquid, solid, gas
C) solid, liquid, gas D) solid, gas, liquid
Answer:
C) solid, liquid, gas
Explanation:
Which grouping shows a decrease in Intermolecular
Forces of Attraction?
A) gas, liquid, solid B) liquid, solid, gas
C) solid, liquid, gas D) solid, gas, liquid
the further the particles are from each other, the less the intermolecular attraction they are farthest in a gas, then a liquid, and closest in a solid
What element has the electron configuration 1s22s22p63523p64523d4?
A.Chromium (Cr)
B.Magnesium (Mg)
C.Manganese (Mn)
D.Iron (Fe)
Answer:
B.Magnesium(Mg)
Explanation:
maybe
A car moves with a velocity of 15 m/s west for 3 seconds. Then, the
car moves with a velocity of 15 m/s east for 1 second. What is the
total displacement of the car?
Answer:
450 metre
Explanation:
VELOCITY = DISPLACEMENT /TIME TAKEN. THEREFORE THE DISPLACEMENT = 450 M.
Explanation:
Please help. Thank you!
what is the electron configuration of uranium at its ground state (in order) AND noble gas configuration?
Answer: Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The chemical symbol for Uranium is U. Electron configuration of Uranium is [Rn] 5f3 6d1 7s2. Possible oxidation states are +3,4,5,6.
Explanation:
Answer:
Electron configuration of uranium at its ground state: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6s6 5f3 6d1 7s2
Noble gas configuration: [Rn] 5f3 6d1 7s2.
Bryan and Alyssa are playing tug-of-war against Daniel and Maria. Bryan and Alyssa are exerting a combined force of 10 N. Daniel and Maria are exerting 12 N of force.
Which of the following has resulted?
A.
a balanced force moving everyone in Daniel and Maria's direction
B.
a balanced force leaving everyone in the same place
C.
an unbalanced force moving everyone in Daniel and Maria's direction
D.
an unbalanced force moving everyone in Bryan and Alyssa's direction
The correct answer is Option (C) An unbalanced force moving everyone in Daniel and Maria's direction.
What is balanced force?The force which is opposite in direction and equal in size.A man pushing a wall is example of balanced force.What is unbalanced force?The force which changes the speed , position and direction of the object to which it is applied is known as unbalanced force ,Turning a cartwheel is an example of unbalanced force.
Why Other options are incorrect? Bryan and Alyssa are exerting a combined force of 10 N.Daniel and Maria are exerting 12 N of forceAs , a result the force applied by the Daniel and Maria is greater then the force applied by Bryan and Alyssa So the direction of Bryan and Alyssa changes.Hence , an unbalanced force moving everyone in Daniel and Maria's direction
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2.What two factors must be held constant for density to be a constant ratio?
Answer:
Temperature and Pressure
Explanation:
Temperature and pressure cause change in volume.
So any change in volume will alter the ratio of density as given by equation of density.
Density = mass/ volume
Change in volume will alter the ratio.
Kindly mark it branliest if the answer is little bit satisfying.
The two (2) factors which must be held constant for density to be a constant ratio are:
I. The temperature of a sample or physical substance.
II. The pressure around the sample or physical substance.
Density can be defined as mass all over the volume of of a sample or physical substance.
Basically, density is mass per unit volume of of a sample or physical substance.
Mathematically, the density of a of a sample or physical substance is given by the formula;
[tex]Density = \frac{Mass}{Volume}[/tex]
The density of a sample or physical substance is directly proportional to pressure and inversely proportional to temperature.
This ultimately implies that, an increase in pressure with temperature being constant would cause an increase in density and vice-versa.
Conversely, a decrease in temperature with pressure being constant would cause an increase in density and vice-versa.
In conclusion, a change in volume of a substance is caused by both temperature and pressure.
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Substances like liquid mercury are very ______, but substances like rubber are very _______
Answer:
electrons form the atoms f one material may move to the atoms of the other material. The movement of electrons from one atom to another changes the charge of the atoms. When an atom loses electrons, it is left with more protons than electrons, so it then has a positive charge. when an atom gains electrons, it has more electrons than protons so its charge is negative.
Explanation:
(b) A student states, "When the alcohol sample was at a temperature of 500 K, all the particles
were moving faster than any of the particles were moving at 400 K." Do you agree or disagree
with this student's statement? Justify your answer.
B
I
Submit
514
alel
(c) Using boxes like the ones below, draw three particle diagrams representing the sample of
alcohol cooling in this experiment. The diagrams should represent the sample at 3 minutes, 12
minutes, and 17 minutes.
Sign out
09:50
The kinetic energy of particles depends on temperature. As temperature increases, the kinetic energy of particles increases.
Temperature is defined as a measure of the average kinetic energy of the molecules of a substance. The higher the temperature of a substance the greater its kinetic energy.
From the foregoing, when the temperature is increased from 400K to 500K, greater kinetic energy is imparted to the molecules of the substance hence they move faster according to the kinetic theory of matter.
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please help with the question attached
I need it in an hour
Answer:
iiiiiiddddiiilllooeiuehe
which of the following is a physical property of the salt crystals shown here?
A.they are gas
B.they cannot burn
c.they are a liquid
D. they are clear white
Answer:
As the explanation i think the answer is D
Explanation:
Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes. Soluble in water (35.6g/100g at 0°C and 39.2g/100g at 100°). Slightly soluble in alcohol, but insoluble in concentrated hydrochloric acid.Physical properties: Sodium chloride is a white crystalline solid with a density of 2.16 g/mL, and a melting point of 801 °C. It is also available as aqueous solutions of different concentrations, called saline solutions. Chemical properties: Sodium chloride is readily soluble in water and other polar solvents.
Pleaseee helppp!!!!!
Answer:
it releases energy that is used for power
Explanation:
Answer: It releases energy that is used for power.
Explanation: https://www.investopedia.com/terms/h/hydrocarbon.asp
1. What atoms make up a molecule of Water?
2. What atoms make up a molecule of Carbon Dioxide?
I would appreciate it if this got answered and I will mark as brainliest, thank you.
Explanation:
Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom
Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms.
I hope you got it..... ♥️
Answer:
1) 1Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. **
2) Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. ^^
why does it smell like burning when i turn my heat on?
Answer:
your lightbulb is mot likely burnt out
Explanation:
5. A football field is about 100 meters long. If it takes a person 20 seconds to run its length, how fast (what speed) were they running?
Answer:
Speed, v = 5 m/s
Explanation:
The length of the football field, l = 100 m
the person takes 20 seconds to run its length
v=
t
d
v=
20 s
100 m
v=5 m/s
During the process of peer review, a scientific study must have:
Group of answer choices (( its not precision//validity ))
repetition
precision
accuracy
validity
Answer:
Accuracy
I guess
Cause then it makes sense
Hope this helps
Why is there gold on the inside of a cell phone but plastic on the outside
Answer:
Gold is chemically stable and conducts electricity.
Small pockets of gold are used to make mobile phone circuit board.
The plastic is lined to act as antenna gate. It's what makes a phone not a calculator but a communication point, since it allows the data flow, Bluetooth connection, Wi-Fi. Mainly, it allows radio waves to flow.
for the following reaction: 1 CuO + 1 H2 --> 1 Cu +1H2O, what is the quantity of moles of H2O when there are 240 grams of CuO present?
Considering the reaction stoichiometry, the quantity of moles of H₂O produced is 3.02 moles.
The balanced reaction is:
CuO + H₂ → Cu + H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
CuO= 1 moleH₂= 1 moleCu= 1 moleH₂O= 1 moleThe molar mass of the compounds present in the reaction is:
CuO= 79.55 g/moleH₂= 2 g/moleCu= 63.55 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of mass of each compound participate in the reaction:
CuO= 1 mole× 79.55 g/mole= 79.55 gramsH₂= 1 mole× 2 g/mole= 2 gramsCu= 1 mole× 63.55 g/mole= 63.55 gramsH₂O: 1 mole× 18 g/mole= 18 gramsThen, it is possible to determine the moles of H₂O necessary by the following rule of three: If by reaction stoichiometry 79.55 grams of CuO produces 1 mole of H₂O, 240 grams of CuO produces how many moles of H₂O?
[tex]molesofH_{2} O=\frac{240 grams of CuOx 1 mole ofH_{2} O }{79.55 grams of CuO}[/tex]
moles of H₂O= 3.02 moles
Finally, the quantity of moles of H₂O produced is 3.02 moles.
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brainly.com/question/11999193 brainly.com/question/15111313?referrer=searchResults brainly.com/question/9926203?referrer=searchResults brainly.com/question/6061451?referrer=searchResultsWhat is the molality of a solution containing 10.0 G of NA2 S04 and 1000.0 G of water
Explanation:
1 literThe total of water is equal to 1000.0 g of water
we need to find the molality of a solution containing 10.0 g of dissolved in Na₂S0₄1000.0 g of water
1. For that find the molar mass
Na: 2 x 22.99= 45.98
S: 32.07
O: 4 x 16= 64
The total molar mass is 142.05
We have to find the number of moles, y
To find the number of moles divide 10.0g by 142.05 g/mol.
So the number of moles is 0.0704 moles.
For the molarity, you need the number of moles divided by the volume. So, 0.0704 mol/1 L.
The molarity would end up being 0.0704 M
The molality of a solution containing 10.0 g of Na2SO4 dissolved in 1000.0 g of water is 0.0704 Mliter
What is patagium and what do you meant by prehensile tail
The patagium (plural: patagia) is a membranous structure that assists an animal in gliding or flight. The structure is found in living and extinct groups of animals including bats, birds, some dromaeosaurs, pterosaurs, gliding mammals, some flying lizards, and flying frogs.
A prehensile tail is the tail of an animal that has adapted to grasp or hold objects. Fully prehensile tails can be used to hold and manipulate objects, and in particular to aid arboreal creatures in finding and eating food in the trees.
Answer:
patagium in American English
1. a wing membrane, as of a bat. 2. the extensible fold of skin of certain insects or of a gliding mammal or reptile, as a flying squirrel.
Explanation:
A prehensile tail pertains to the tail of certain animals that enable the latter to grasp or hold objects. ... A fully prehensile tail is one in which the animal can fully hold on to and manipulate an object with its tail.
1- Calcium Hydroxide + Calcium Bicarbonate
2- Calcium Bicarbonate + Sodium Carbonate
3- Calcium Sulphate + Sodium Carbonate
4- Sodium compound + Calcium Sulphate
5- Carbon dioxide + Calcium Carbonate
6- Calcium Bicarbonate + Calcium Carbonate
Remember these followings :-
Acid + Base = salt + water
Acid + metal = salt + hydrogen
Acid + carbonates = salt + water + carbon dioxide
Base + ammonium salt = salt + ammonia + water
Base + acidic oxide = salt + water
I hope that you will be clear via these formulas.
A scientist studying the properties of two different gases recorded this data. If the scientist wants to study gas samples A and B at
standard temperature and pressure (STP), what must she do before continuing experimentation?
Answer:
C. Decrease the pressure of Gas A and increase the temperature of Gas B.
Explanation:
The values for standard temperature and pressure (STP) are zero degrees Celsius and one atmosphere. Since the temperature of gas A is higher than zero degrees, it will have to be reduced. Since the pressure of gas B is less than one atmosphere, it will have to be increased.
Pls help!!! for 100 points, please only answer if your actually going to 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:
What was the ratio in the formula for Iron (II)
oxide?
lete
What was the ratio in the formula for Iron (III)
oxide?
DONE
Answer:
In Iron (II) oxide, ratio is 1:1
In iron (III) oxide, ratio is 4:2
[tex].[/tex]
In Iron (II) oxide, ratio is 1:1
What is the importance of iron oxide?Iron oxides are very important components in most soils as they have major influence on chemical, physical, and microbial properties of soils. Because of their nanoparticulate size (usually 5-200 nm), iron oxides possess large specific surface area.
Generally, iron oxides are prevalent, widely used as they are inexpensive, and play an imperative role in many biological and geological processes. They are also extensively used by humans, eg, as iron ores in thermite, catalysts, durable pigments.
When iron is exposed to moisture or oxygen, oxidation occurs. During this chemical reaction, iron is converted into iron oxide. The iron oxide typically has a reddish, flaky appearance that becomes progressively worse over time.
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All mater has ___ and takes up ___
Matter is anything that has mass and takes up space.
hope this helps <3
What can affect the properties of a substance?
neither the arrangement nor the types of atoms
only the types of atoms
the arrangement and types of atoms
only the arrangement of atoms
hii thank you for helping me for that question please give me now this question define the air polution
Answer:
A mixture of solid particles and gases in the air.
Explanation:
Air pollution is a mixture of solid particles and gases in the air. car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.
Air pollution can be defined as the presence of toxic chemicals or compounds (including those of biological origin) in the air, at levels that pose a health risk. In an even broader sense, air pollution means the presence of chemicals or compounds in the air which are usually not present and which lower the quality of the air or cause detrimental changes to the quality of life (such as the damaging of the ozone layer or causing global warming).
[tex]\boxed{\begin{array}{}{{\tt{Hope it's Help}}}\end{array}}[/tex]
how many sodium ions are designated as bound?
Answer:
3
Explanation:
3
Which subatomic particle has a positive charge?
Question 1 options:
all particles
neutron (n0)
proton (p+)
electron (e-)
Question 2 (2 points)
What information does the atomic mass of an element provide?
Question 2 options:
the difference between the number of protons and electrons (p - e)
the number of isotopes
the sum of electrons and protons in an atom (e + p)
the number of protons and neutrons in an atom (p + n)
Question 3 (2 points)
What is the atomic number of an atom?
Question 3 options:
the number protons and neutrons
the number of protons
the number of neutrons
the number of electrons and neutrons
Question 4 (2 points)
What is H2O (water) classified as?
Question 4 options:
a diatomic molecule
an atom
an element
a molecule
Question 5 (2 points)
Which property is a physical property?
Question 5 options:
easy to digest
becomes moldy quickly
does not burn
malleable (the quality of something that can be shaped into something else without breaking )
Question 6 (2 points)
What state of matter has a defined volume but undefined shape?
Question 6 options:
solids and liquids
liquids
liquids and gases
gases
Question 7 (2 points)
Which statement best describes the difference between a physical change and a chemical change?
Question 7 options:
A chemical change does not result in a new substance being formed, whereas a physical change does.
A chemical change results in a new element being formed, and a physical change results in a new compound being formed.
A physical change produces a new element, and a chemical change results in a bond breaking between atoms.
A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
Question 8 (2 points)
Where are nonmetals located in the periodic table?
Question 8 options:
in the middle
along the bottom
along the upper left side
along the upper right side
Question 9 (2 points)
The elements fluorine (F), chlorine (Cl), and Iodine are all part of the same ____________________ on the periodic table.
Question 9 options:
period
group
Question 10 (2 points)
How are elements arranged on the periodic table?
Question 10 options:
atomic mass (# of protons and neutrons)
atomic number (# of protons)
density
boiling point
Help please ill give 100 points
Answer:
SCORE WARNING ! ! ! (JUST FINISHED MY TEST AND GOT A B IM NOT SURE WHICH ONE WAS INCORRECT btw it was the K12 8th grade test)
1. C / Proton (p+)
2. D / the number of protons and neutrons in an atom (p + n)
3. B / the number of protons
4. D / a molecule
5. B / becomes moldy quickly
6. D / gases
7. D / A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
8. D / upper right side
9. B / group
10. B / atomic number (# of protons)
Explanation:
I just took the test
The positively charged subatomic particles are called protons. The mass number of an atom is the sum of number of protons and neutrons and the atomic number is the number of protons.
What is an atom?An atom is the basic unit every substances. It is made up of subatomic particles electrons, protons and neutrons. The positively charged particles are called protons. Whereas electrons are negatively charged.
The atomic number is the number of protons and the mass number indicates the sum of number of protons and neutrons.
Water can be classified as a diatomic molecule formed from two hydrogens and one oxygen atom. Among the given, malleability is a physical property. It is the ability to change the shape and size of metal blocks.
Liquids has definite volume but does not have a defined shape. They assume shape of the container.A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
Nonmetals are located in the side upper right side of periodic table. Metals are covered in left and middle portion. The elements F, Cl are in same group. All the elements are arranged in periodic table based on their atomic number.
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