Answer:
Mass is used to measure the weight of an object. For example, you are measuring the mass of your body when you step on to a scale. In the metric system of measurement, the most common units of mass are the gram and kilogram.
Explanation:
Which describes radioactive decay of a substance? More of the radioactivity is lost during the first half-life than in later half-lives. More of the radioactivity is lost during the fourth half-life than in the first half-life. Isotopes are the most stable during the first half-life. Isotopes are the least stable during the later half-lives.
Answer:
Yes, A.) "More of the radioactivity is lost during the first half-life than in later half-lives." is the correct answer!!
Explanation:
I took the practice test on edge
More of the radioactivity is lost during the first half-life than in later half-lives describes radioactive decay of a substance.Hence, Option (A) is Correct.
What is Radioactive Decay ?
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation.
A material containing unstable nuclei is considered radioactive.
Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles.
Therefore, More of the radioactivity is lost during the first half-life than in later half-lives describes radioactive decay of a substance.Hence, Option (A) is Correct.
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If an atom has 29 electrons and a mass of 64, and it is neutral, what is the name of the atom?
Explanation:
Copper has an atomic number of 29, so it contains 29 protons and 29 electrons. ... The atomic weight of copper is 64; it has 29 protons and 35 neutrons.
Which of the following is NOT one of the 6 basic elements of life?
A. Oxygen
O B. Potassium
C. Carbon
D. Hydrogen
Answer:
B
Pottasium is very good for your body, but for humans to live, we necessarily do not really need potassium. Answer should be B.
how does the hill Height affect the speed in there for the energy of a roller coaster
Answer:
the higher the hill the faster it'll be when coming down it. if going up the hill then the speed will be slower
Explanation:
Answer:
There are 2 types of energy - kinetic and potential. Potential energy is built up, while kinetic energy is released. As the roller coaster goes higher, it pulls further away from gravity. As it goes down, it accelerates (Gains speed). The KINETIC ENERGY in the roller coaster grows as it goes down.
Your question is kind of confusing but I think I answered it correctly based on what you asked.
What is the atomic number of aluminum
Answer:
The atomic number of aluminum is 13.
Hope the pic helps! <3
If there are 1,000 mg in 1
gram. Then how many mg are
in 2.5 grams?
Answer:
1 gram =1000mg
Explanation:
Then 2.5g=2.5*1000
2500mg
23. SIO2
What is the compound?
Silicon dioxide is the compound
Someone plz help me out ASAP
Answer:
Fluorine has 9 protons and 9 electrons
Iodine has 53 protons and 53 electrons
Explanation:
what is removed during the formation of nucleic acid polymers?
Answer:
inside cells are removed
If 175 undecayed nuclei remained from a sample of 2800 nuclei, how many half-lives has passed? *
Answer:
209
Explanation:
Answer:
Four half lives
Explanation:
*BRAINLEST* is a solution an element, compound, homogenous mixture, or heterogeneous mixture?
The electrolyte that is used to make Hypochlorous Acid is made from Sodium Chloride (NaCl). the bottle says that the electrolyte solution contains 25% sodium chloride. If 2.4 ounces of the solution is added to the half gallon to prepare for the reaction. How many total grams of sodium chloride are used in the reaction. If the reaction produces 1100 PPM of HOCl (hypocholorus acid) how many grams of Hypocholrous are made? Do you think all the NaCl was converted to HOCl? or we can brew one more time and get more HOCl. If all of the NaCl converts to HOCl what would be the maximum possible PPM of the disinfectant
Answer:
63.9 grams. Yes, the Nacl was converted. Maximum possible ppm is 540ppm.
Explanation:
I this is college level chemistry not regular high school chem.
Answer:2
Explanation:
it is it do not ask questions
.Which term best describes the important pieces of information that scientists gather and record during an experiment?
conclusions
data
research
supplies
Answer: Data
Explanation:
The answer is data because data is important pieces of evidence that is collected in a table or a graph.
Answer:
B. Data
Explanation:
Cuz is said so duh
What is vocational training
Answer:
Vocational training refers to instructional programs or courses that focus on the skills required for a particular job function or trade. Vocational training education prepares students for specific careers, disregarding traditional, unrelated academic subjects.
Any ions with a charge (3+ ) has?
Answer:
protons
Explanation:
True or false? the outermost electrons in a metal atom are free to move throughout the whole structure of the metal?
Water and salt are compounds made of the combination of more than one type of atom. Which statement is false?
Answer:
This statement is correct
Explanation:
Water is made up of 2 hydrogen atoms and 1 oxygen atom while salt is made up of 1 atom of sodium and 1 atom of chloride
:)
What is true and false
For each statement below, write true or false.
16. The mass of an object can vary with the object's location.
17. A mass measurement includes the effect of Earth's gravitational pull on the object
being measured.
18. Scientists measure the amount of matter in terms of mass.
19. Subtle differences in weight exist at different locations on Earth.
20. Your mass on the Moon would be smaller than your mass on Earth.
Answer:
16. false (mass always stays the same)
17. false (that's weight)
18. true
19. true (I think)
20. false (same as 16 and 17)
hope I could help
True and false for each statement is:
16. false
17. false
18. true
19. true
20. false
What is mass?Mass is the quantity of matter. It calculates the inertia of the body. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force. The change caused by an applied force is smaller the more mass a body has.
The mass of a body is the same everywhere, but the weight changes in different places due to gravity. The force of gravity is different in different places, so the weight changes.
That's, why the mass measurement does not include the effect of Earth's gravitational pull on the object. It's the weight.
Thus, the correct options are 16. false, 17. false, 18. true, 19. true, and 20. false.
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A balloon is inflated such that a radius is 7 cm what is the volume of air inside the balloon in milliliters
Answer:
[tex]V=14373.33\ \text{mm}^3[/tex]
Explanation:
It is given that,
The radius of the inflated balloon is 7 cm.
We need to find the volume of air inside the balloon in milliliters.
The balloon is in the shape of a sphere whose volume is given by :
[tex]V=\dfrac{4}{3}\pi r^3\\\\\text{Put r = 7 cm}\\\\V=\dfrac{4}{3}\times \dfrac{22}{7}\times 7\times 7\times 7\\\\V=1437.33\ \text{cm}^3\\\\\text{We know that, 1 cm = 10 mm}\\\\\text{So},\\\\V=14373.33\ \text{mm}^3[/tex]
Hence, the volume of the air inside the balloon is [tex]14373.33\ \text{mm}^3[/tex].
How do I solve Convert 496 cm to meters
Answer:
4,96 m
Explanation:
100 cm =1m
496 cm =4, 96 m
Carbon-14
What is the name of this element?
What is the mass number of this element?
What is the atomic number of this element?
How many;
Protons?
Neutrons?
Electrons?
2. Sulfur dioxide (SO2) gets blasted out of volcanoes and reacts with oxygen (O2) in our
atmosphere to produce sulfur trioxide (SO3). If 128 grams of sulfur dioxide reacts with
oxygen in the atmosphere and 160 grams of sulfur trioxide (SO3) is produced, how many
grams of oxygen originally reacted?
SO2 + O2= SO3
Avagadros Law..
Definition please..
Answer:
"Avogadro's law is an experimental gas law relating the volume of a gas to the amount of substance of gas present. The law is a specific case of the ideal gas law. A modern statement is: Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules."
Answer:
Avogadro's law states that the equal volume of all gases at the same temperature and pressure contain the same number of molecule
define chemistry using a poem
Answer:
An arrangement of words written or spoken: traditionally a rhythmical composition, sometimes rhymed, expressing experiences, ideas, or emotions in a style more concentrated, imaginative, and powerful than that of ordinary speech or prose: some poems are in meter, some in free verse. noun.
Explanation:
please follow me and mark me as brainliest and give a thanks pleease.
2. What is the relationship between the scientific method and bias? Explain in detail.
The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. It results from personal beliefs, as well as cultural beliefs, which means any human filters information based on his or her own experience.
How many moles are in a sample of 32.6732 g of lead ?
Answer:
0.157689 moles
Explanation:
what is boiling point.
Answer:
"the temperature at which a liquid boils and turns to vapor." - Google Dictionary
If two objects have the same density, they must have the same?
Answer:
False, two objects can have separate chemical make-ups, yet still be the same density.
Answer:
Mass
Explanation:
because density is mass/volume
Which statement best explains why water has a higher boiling point than ethane?
Ethane molecules are smaller than water and can move faster.
Water molecules need relatively less heat energy to move.
Water molecules form hydrogen bonds, which cannot be broken by heating water.
Ethane molecules have no hydrogen bonds and need less energy to separate.
Answer:
Ethane molecules have no hydrogen bonds and need less energy to separate.
Explanation:
Ethane: has no hydrogen bonding, it has low melting, boiling points, and is a gas at room temperature.
Water: has strong hydrogen bonding between H and O, has relatively high melting and boiling points.
Statement that explains the relationship between boiling point of water and ethane and how the boiling point of water is higher than ethane is D:Ethane molecules have no hydrogen bonds and need less energy to separate.
The boiling point of water is usually high compare to that of ethane because of the hydrogen bonds present in water which is a electromagnetic attraction between hydrogen atom electronegative atom of Oxygen.And which this requires so much energy to break unlike ethane that doesn't contain any hydrogen bond.
Therefore, option D is correct.
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Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus.
Sodium’s electron affinity value is more negative than the electron affinity value of phosphorus.
Phosphorus’ electron affinity value is more negative than the electron affinity value of sodium.
This information cannot be determined using the periodic table.
Answer:
Phosphorus’ electron affinity value is more negative than the electron affinity value of sodium.
Explanation:
I got it correct
Answer:
Phosphorus’ electron affinity value is more negative than the electron affinity value of sodium
Explanation:
i got it right
