Which of the following is a Halogen?
Answer:
Fluorine(F),chroine(CI),bromine(BR),iodine(I)astatine(AT)
Explanation:
friend me when u say thank u
write the chemical reaction and return the chemical equation: Ammonia when it interacts with oxygen produces nitric oxide (II) and water
Answer:
NH3 + 02 > NO + H2O
Explanation:
Can somebody plz help answer both questions correctly thank you!!
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :D
Answer:
answer #1 used throughout the world to power devices, appliances and methods of transportation utilized in daily life. To make things operate, electrical energy must be emitted from energy sources such as power plants, to enable an object to consume the power it needs to function. ((if you want to cut it down short use the two first sentences))
answer #2 We get solar heat energy from the sun, and sunlight can also be used to produce electricity from solar
Explanation:
Which runner had the fastest speed in the race?
Which runner had the slowest speed in the race?
Which runner had a head start?
The following answers are in order of the questions:
Which runner had the fastest speed in the race?
✔ A
Which runner had the slowest speed in the race?
✔ C
Which runner had a head start?
✔ C
What do you think is the difference between HEAT & TEMPERATURE?
Answer:
"Heat describes the transfer of thermal energy between molecules within a system and is measured in Joules. Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius"
Explanation:
is there DNA in the stucture of prokryotic
Answer:
i hope this helped
They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid. Prokaryotic organisms have varying cell shapes.
Explanation:
Answer:
Explanation:
The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments.
Which continents were most difficult to place? Why?
Answer:
Antarctica and Australia
Explanation:
Since both of these are furthest south it is more difficult to measure the correct distance between them.
The continents that were the hardest to locate were Antarctica and Australia because they are both the ones that are the furthest south, making it more challenging to calculate the proper distance between them.
A continent is a huge, continuous landmass on the surface of the Earth, typically divided by oceans or other major bodies of water. Africa, Antarctica, Asia, Europe, North America, Australia, and South America are the seven continents of the world. In terms of topography, climate, culture, and biodiversity, each continent is distinct. For instance, Asia is home to the Himalayas, the world's highest mountain range, while Africa is renowned for its huge savannas and diverse animals. While Australia is well known for its distinctive flora and wildlife, Europe is known for its historical sites and artistic creations.
To know more about continent, here:
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How are the law of definite proportions and the atomic theory related to each
other?
Answer:
they both have to do with proportions
Explanation:
Please help.
Write the orbital notation for each of the following: (Be sure to label your sublevels)
a) O b) Sc
Explanation: In writing the electron configuration for oxygen the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for O go in the 2s orbital. The remaining four electrons will go in the 2p orbital. Therefore the O electron configuration will be 1s22s22p4.
What type of compound is formed by the transfer of electrons from one atom to another?
1) Hydrogen Compound
2) Coordinate Covalent Compound
3) Ionic Compound
4) Covalent Compound
5) None of the above
Answer:
ionic compound
Explanation:
ionic bonding
In ionic bonding, electrons are completely transferred from one atom to another. In ionic bonding, electrons are completely transferred from one atom to another. In the process of either losing or gaining negatively charged electrons, the reacting atoms form ions.
pls vote brainliest it would rlly help me out ❤❤❤
Certain gases in the atmosphere trap heat on Earth.
What is the name of this phenomenon?
cooling period
the greenhouse effect
global warming
glacial melting
if right i give brain thx and 5 star
Answer:
Greenhouse
Explanation:
Which one of these is NOT a sign of chemical change? *
Fire
Bubbles
Liquid
Light
Heat
Cold
Answer:
light
Explanation:
light is either from electricity or from the sun
How many moles of MgO can be made from 5 moles of Mg?
2Mg + O2 -> 2MgO
Answer:
Explanation:
The expected product is MgO, so the 1-to-1 mole ratio Mg to O in the product is all that is required.
Write the electron configuration of the element that has Z = 3 *
Answer:
1s²2s^1
Explanation:
Lithium Z = 3
Prokaryote.
Prokaryotes are (What) celled organisms that lack a nucleus and
membrane-bound organelles.
Answer:
single celled organisms
Answer:
singled celled organisms
Explanation:
Just had class and they said this in class
The balanced equation for photosynthesis is shown below.
6 CO2 + 6H20 - C6H1206+6 02
Which statement best justifies the conservation of mass during photosynthesis? (4 points)
A
The number of oxygen atoms is equal to the number of carbon atoms on each side.
The total number of hydrogen atoms on both sides is 18.
The total number of carbon atoms on both sides is 6.
Answer:
- The total number of carbon atoms on both sides is 6.
Explanation:
- The total number of carbon atoms on both sides is 6.
The other options have incorrect numbers.
Based on your knowledge of the periodic table, identify the element Y.
Answer: argon
Explanation:
using the last clue “avg atomic mass of 3.33x greater than carbon-12” we can deduce the atomic mass of the element is 12x3.33=40(2sf) hence its argon. we can further confirm from third clue that it is a noble gas hence unreactive
A patient is given 0.050 mg of technetium-99 m (where m means metastable—an unstable but long-lived state), a radioactive isotope with a half-life of about 6.0 hours.
How long until the radioactive isotope decays to 1.3×10−2 mg ?
The correct answer is 9.6h.
As you know, a radioactive isotope's nuclear half-life tells you exactly how much time must pass in order for an initial sample of this isotope to be halved.
Using the formula , A = Ao. [tex]1/2^n[/tex]
where , A- final mass after decay
Ao - initial mass
n - the number of half-lives that pass in the given period of time
Now, putting all the values, we get
1.3 × [tex]10^-2[/tex] mg = 0.050 mg × [tex]1/ 2^n[/tex]
Take the natural log of both sides of the equation to get,
㏑[tex](1.3 . 10^{-2} / 0.050 )[/tex] = ㏑[tex]((1/2)^{n})[/tex]
㏑[tex](1.3 . 10^{-2} / 0.050 )[/tex] = n. ln[tex](1/2)\\[/tex]
n = 1.6
Since n represents the number of half-lives that pass in a given period of time, you can say that
[tex]n = t / t _{1/2}[/tex]
t= 1.6 × 6 h
t = 9.6h
Hence, it will take 9.6 h until the radioactive isotope decays.
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In 5.49 seconds, 1.2 grams of Argon-35 decay to leave only 0.15 grams. What is the half-life of Argon-35
A- 21.96 seconds
B- 16.47 seconds
C- 1.83 seconds
D- 1.3725 seconds
The diagram shows an animal cell.
Which letter marks the location where carbon dioxide is
produced during respiration?
W
X
Y
Z
Answer:
X
Explanation:
Letter X is mitochondria. The mitochondria produces carbon dioxide, water, and ATP energy during cellular respiration.
pleaseee helpp
What is ONE way in which we monitor potential threats of flooding?
Question 3 options:
Satellite
Scuba Divers
SONAR
Seismometers
Question 4 (1 point)
The force that makes landslides so destructive is...
Question 4 options:
Weathering
Mountains
Wind
Gravity
Question 5 (1 point)
Coastal flooding occurs when
Question 5 options:
Rocks or debris block rivers causing them to overflow
Severe weather occurs causing large waves to hit the coast
Huge amounts of snow and ice melt due to sudden temperature variations
Colossal amounts of rain fall in a short period of time
Answer:
The first one is Satellite! Second one is Gravity! Third one is Severe weather occurs causing large waves to hit the coast!
Explanation:
I took the test~
How much energy, in kWh, is used if a hair dryer with a power of 20 watts was used for
0.5 hours? (Remember to convert to kW first!!!!)
Answer:
0.01kWh
Explanation:
Given parameters:
Power = 20watts
Time = 0.5hrs
Unknown:
Energy of other dryer = ?
Solution:
The electrical energy of the dryer can be calculated using the expression below;
Electrical energy = IVt
P = IV
I is the current
V is the voltage
t is the time
P is the power
Convert 20watts to kilowatts;
1000watts = 1kW
20watts = [tex]\frac{20}{1000}[/tex] = 0.02kW
Electrical energy = 0.02kW x 0.5hr = 0.01kWh
[tex]1000 \: watts = \: 1kW \\ 20 \: watts = \: \frac{20}{1000} \\
\: = 0.02kW \\
Electrical \: energy = 0.02kW x 0.5hr \\ = 0.01kWh[/tex]
what is solvent!!?️
Answer:
Solvent, substance, ordinarily a liquid, in which other materials dissolve to form a solution.
Answer :
A Substance that dissolves a solute, resulting in a solution.
If you don't know how to find it between the solvent and solute then the solvent is usually the one that is of more quantity.
a solid sample of copper is an excellent conductor of electric current. which type of chemical bonds are in the sample ?
a.ionic bonds
b.metalic bonds
c.nonpolar bonds
d.polar bonds
Awnser
B. Metallic bonds
Explanation:
Castle Learning
Answer:
B) metallic bonds
Explanation:
Castle learning
What evidence do you need to determine that two rocks have some similar minerals because the minerals from the original rock was eroded then it was later compressed with other minerals to form a different rock.
Answer:
It comes from same parent material.
Explanation:
The two rocks have some similar minerals which indicates that they are comes from the same parent material but with the passage of time it is mixed with other minerals due to which they are some different in composition from one another so we can conclude that they comes from the same parent material due to the presence of some similar minerals.
Will GIVE BRAINLIST IF YOU ANSWER CORRECTLY Identity the type of reaction and balance the equation, including the states of matter, for the following reactions
(5 Points) aqueous aluminum nitrate is added to solid calcium
Type of Reaction: Double Displacement, Solid
Al(NO3)3 (aq) + Ca (s) → Al2Ca3 (s) + NO3 (aq)
(5 Points) aqueous barium chloride is added to aqueous potassium sulfate
Type of Reaction:
BaCl2(aq) + K2SO4(aq) → KCl (aq) + BaSO4 (s)
(5 Points) solid magnesium oxide is heated
Type of Reaction:
MgO (s) →
(5 Points) solid zinc is added to oxygen gas
Type of Reaction:
Zn (s) + O2(g) →
(5 Points) aqueous cobalt (II) chloride is added to solid magnesium filings
Type of Reaction:
CoCl2(aq) + Mg (s) →
(10 Points) Write a double replacement reaction where one of the products is copper (II) hydroxide. Include the states of matter for each of the reactants and products.
(10 Points) Write a decomposition reaction where the reactant is ammonium nitrate.
Include the states of matter for each of the reactants and products.
(10 Points) Write a synthesis reaction where one of the reactants is aluminum.
Include the states of matter for each of the reactants and products.
(5 Points) Give three indications that a chemical reaction has occurred.
Answer: i hope these help, lmk if they’re right.
Explanation:
Thermal energy is the ___ of the kinetic and potential energies of all particles in an object.
A sum B difference C multiplication
Answer:
A.
Explanation:
I forgot butt im surely it is;-)
Some animals have an organ called the gizzard. The gizzard is muscular and helps to crush up hard food. Earthworms and many birds, including chickens, have gizzards. Chickens swallow small rocks that help the gizzard to grind up food. Did plant-eating dinosaurs have gizzards too? No one has found an actual dinosaur gizzard, but they have found small piles of round rocks inside dinosaurs’ ribcages.
Based on its function, the gizzard is part of the *blank*
system.
Answer:
digstive system
Explanation:
What does the little ‘2’ in 2O2 mean?
Answer:200
Explanation:
One mole of ANY element contains the:
same mass as one mole of any other element
same number of atoms as one mole of any other element
same gram-formula-weight as one mole of any other element
both the first and second choices
Answer:
1)The molar mass of an atom is simply the mass of one mole of identical atoms. However, most of the chemical elements are found on earth not as one isotope but as a mixture of isotopes, so the atoms of one element do not all have the same mass.
2)Equally important is the fact that one mole of a substance has a mass in grams numerically equal to the formula weight of that substance. Thus, one mole of an element has a mass in grams equal to the atomic weight of that element and contains 6.02 X 1023 atoms of the element.
Answer:all thing will be moving around