Answer:
what are the choices?
Explanation:
Wha is the symbol and ionic charge of a element with 28 proton and 25 electrons?
Explanation:
bro the given address to subscribe and vaccine aur bhi
What type of reaction is FeS + 2HCl àFeCl2 + H2S?
Answer: 3 4 a noodles
Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]
What does it mean when someone has done multiple trials? A. They have performed an experiment once and reported their findings. B. They have performed a scientific experiment more than once. C. They have performed an experiment that can only be performed once. D. They have designed an investigation to answer a question.
A. They have performed an experiment once and reported their findings.
a sample contains 4.0x10^25 molecules of hydrogen peroxide (H2O2) how many hydrogen atoms would be in the sample?
How can you change a objects state of matter
Answer:
Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.
Explanation:
Which part of a seed plant develops into sperm cells? o embryo pollen 0 seed O xylem
Answer:
Pollen
Explanation:
bc i take notes and also my sister studies bio
PLZ GIMME BRAINLIEST
Answer:
correct
Explanation:
GIVING BRAILIEST FOR ANSWER
Answer:
B
Explanation:
Answer:
c is the answer
Explanation:
One of the most common iron oxides is iron (III) oxide, known as rust. The chemical formula for rust is Fe2O3. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3.
what is the smallest division on 4 balance
Answer:0.1g
Explanation:
Answer: The smallest scale division is a tenth of a centimeter or 1 mm.
Explanation: I got this from a website but I hope it helps!
The picture shows to containers filled with a gas, both initially at room temperature
AAA
Ice
Heat
Which statement is correct? (5 points)
The gas particles in both containers have the same average kinetic energy because they have equal number of particles
The gas particles in both containers have the same average kinetic energy because they have the same volume
The average kinetic energy of the gas particles is greater in container A because it has a lower temperature
The average kinetic energy of the gas particles is greater in container 8 because its particles move faster
Od
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
Option D is the correct statement. From the excerpt, it can be seen that container B is being heated. The heat that is applied to container B will make the temperature of the gas to increase, thereby increasing the average kinetic energy. This will cause the gas molecules to mover faster and with force hitting the walls of the gas container. At this time, pressure should increase. Also, the volume of the gas increases just as the temperature of the gas also increases.
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
What is bonding all about in chemistry?
Answer:
It is like about a attraction between atoms, molecules, and more.
54:63 ratio simplest form?
Answer:
The fraction is 6/7
Explanation:
6/7 is the simplified fraction for 54/63 by using the GCD or HCF method. Thus, 6/7 is the simplified fraction for 54/63 by using the prime factorization method.
Hope this helps!!!
Can I have Brainliest???
The elements fluorine (F), chlorine (Cl), and iodine (I) are all part of the same _________on the periodic table.
Explanation:
The elements Fluorine (F),Chlorine (Cl) and Iodine (I) are all part of the same Group ( i.e, Group 17 ) on the periodic table.
Answer:
Group
Explanation:
The ____ are new substances that are created following a chemical reaction. *
A:chemical reactions
B:products
C:reactants
D:coefficients
Answer:
b
Explanation:
Why do leavening gases expand faster at higher altitudes
Answer:
Cakes, breads and other foods that contain leavening agents rise more quickly at higher altitudes, because gases produced by the agents expand faster than at sea level. The loaves may collapse if the gases dissipate before the proper temperature is reached. Most baking recipes can be adjusted for high altitudes.
Explanation:
PLEASE MARK ME AS BRAINLIEST
After burning your candle for a few hours you and your friend notice that it's mass has decreased. Your friend claims that the mass "disappeared". Why do you know he is wrong (Hint: it's a Scientific Law)? What actually happened to the mass? What form is that mass in now? What is this process called?
Answer:
The law of conversion of mass is a scientific law that says that mass or matter can not be created or destroyed like energy but changes its form in a different type of state. So, by the law of conversion of mass, you can say that mass is not disappeared but change in different forms of states of matter like gas, soot, or melted residues of candle and ash of thread.
Due to this, the mass of the solid or waxy state due to burning changes to gas released by burning and residue of wax that will be equal to the mass of the original mass.
I need help with this pls
Answer:
[tex]1)20 \\ 2)13 \\ 3)82 \\ 4)56 \\ 5)26 \\ 6)1 \\ hope \: it \: helps \\ plzzz \: mark \: it \: as \: brainliest...[/tex]
What is and ionic bond and how it forms and why it forms
In the passage, you read about Dalia Kirschbaum, a geomorphologist. In her work, she uses weather data collected
by NASA satellites to study which events?
Answer:
Landslides
Explanation:
Answer:
Landslides
Explanation:
Correct on edge
73 gram of HCl was filluted by adding 144gram of water.how many gram atom of hydrogen are present in the dilute acid?
Mass of Hydrogen atoms : 18 g
Further explanationGiven
73 gram of HCl
144gram of H₂O
Required
Mass (gram) atom of Hydrogen
Solution
H atoms are in 2 compounds, H₂O and HCl, so we calculate their mass in each compound
mass H in H₂O :[tex]\tt \dfrac{1}{36.5}\times 73=2~g[/tex]
mass H in HCl :
[tex]\tt \dfrac{2}{18}\times 144=16~g[/tex]
total mass = 2 g+ 16 g = 18 g
During a chemical reaction, heat is absorbed. What kind of reaction occurred?
A) An endothermic reaction
B) An exothermic reaction
Answer:
Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. A good example of an endothermic reaction is photosynthesis. Combustion is an example of an exothermic reaction. The categorization of a reaction as endo- or exothermic depends on the net heat transfer.
Explanation:
Answer:
An endothermic reaction
Explanation:
The heat is being absorbed so it's and endothermic reaction
6.
What volume does 14.0 g of Hydrogen gas (Hz) take up at a temperature of 30°C and a pressure of 120 kPa?
Note: Use Ideal gas law. R=8.31 (kPa x L)/(mol x K)
Answer:
V = 146.87 L
Explanation:
Given data:
Mass of sample = 14.0 g
Pressure of sample = 120 kpa
Volume of gas = ?
Temperature of gas = 30°C
Solution:
Number of moles of gas:
Number of moles = mass/molar mass
Number of moles = 14.0 g/ 2 g/mol
Number of moles = 7 mol
Pressure of gas:
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 8.31 KPa.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
30+273 = 303 K
by putting values,
120 KPa × V = 7 mol × 8.31 KPa.L/ mol.K × 303 K
V = 17625.51 KPa .L/ 120 KPa
V = 146.87 L
g (True/false)Sodium borohydride, NaBH4, is a reducing reagent which converts carbonyl to carboxylic acids
Answer:
False
Explanation:
Sodium borohydride, NaBH4 is a reducing agent. The conversion of a carbonyl to carboxylic acids is an oxidation reaction.
Sodium borohydride, NaBH4 does not perform an oxidation reaction, it is only used for reduction reactions. Hence the statement in the question is false.
Help me I got stuck
Pls
China's net exports are represented by a positive integer. Explain what this tells you about imports and exports of China.
A.China's exports exceed imports by 120 billion c.
B.China's total exports are 120 billion dollars.
C. China's total imports are 120 billion dollars.
D. China's imports exceed exports by 120 billion dollars.
Please select the best answer from the choices provided.
A. A
B. B
C. C
D. D
Answer: the answer would be A
Explanation:
Answer:
A
Explanation:
The compound with the molecular formula C4H10 is called
Answer:
butane
Explanation:
I hope this helps!
Answer:
Butane
...............
During a chemical reaction, heat is absorbed. What kind of reaction occurred?
A)
An endothermic reaction
B)
An exothermic reaction
Answer:
b
Explanation:
WILL GIVE BRAINLIEST
Choose the answer that best describes strong currents of warm, moist air rapidly rising to altitudes of 40,000 feet causing heavy rain, lightening, hail, winds, and flash flooding.
A. tornado
B. cyclone
C. thunderstorm
D. temperature inversion
What problems can temperature inversions create?
A. can create dust storms making air hard to breath
B. can cause cyclones to form
C. can cause hail, rain and high winds
D. can trap polluted air causing health problems
What are rotating air currents circulating around a vertical axis inside a supercell?
A. downdrafts
B. tornado
C. mesocyclone
D. windshear
What is a cyclone called that generates winds of 200 kmph and rotates in a counter-clockwise movement in the Pacific Ocean?
A. a typhoon in the northern hemisphere
B. a cyclone
C. a hurricane
D. a typhoon in the southern hemisphere
Answer:
1. C. thunderstorm
2. D. can trap polluted air causing health problems
3. C. mesocyclone
4. B. a cyclone
Explanation:
A temperature inversion happens as a result of warm air developing over a layer of cooler air.
A thunderstorm is a violent weather with strong winds, lightning, thunder, heavy rain fall and dense clouds. This occurs when warm air rise in an updraft to cooler atmosphere.
Answer:
1. Thunderstorm
2.can trap polluted air causing health problems
3.mesocyclone
4.typhoon in the northern hemisphere
Explanation:
Mercury completes one orbit around the Sun in 68 days.
a. True
b. False
Answer:
true :PP
Explanation:
What is the nuclear charge of an atom of Silver?
A) +79
B) +47
C) +108
D) +61
Answer:
47 is your correct ans, which is b