Answer:
Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to reach our eyes.
The short answer is that it takes sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.
If the Sun suddenly disappeared from the Universe (not that this could actually happen, don’t panic), it would take a little more than 8 minutes before you realized it was time to put on a sweater.
Explanation:
That is what I would put
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which metal has a soluble carbonate, chloride and sulfate ?
a. copper
b. potassium
c. zinc
d. barium
Na-23 has 12 neutrons. What is its atomic number?
O A. 11
O B. 12
O c. 23
O D. 34
Answer: D
Explanation:
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Answer:
A.ns .is d ok I think it was very much helpful to you
Name the compound formed when a copper cation has a 2+ charge combined with a bromine anion that has a 1- charge.
Answer: The compound is called copper (II) bromide or cupric bromide
Explanation:
How many sig-figs in the following measurements?
1.605 cm =
16.050 cm =
16.050 cm =
Write the answers to the appropriate number of sig figs
12 + 12.5 + 125 =
1.62 x 10^3/2.8 x 10^-5 =
Answer:
1.605cm = 4 significant figures
16.050cm = 4 significant figures
16.050cm = 4 significant figures
12 + 12.5 + 125 = 149.5 = 4 significant figures
1.62 × 10^3/2.8 × 10^-5 = 1620/0.000028 = 11 significant figures
What does chlorophyll do?
If the plum pudding model of the atom was correct, what should the results of Rutherford’s experiment be?
Most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil.
Most of the positively charged particles should pass straight through the foil because they move easily through the positively charged matter in the gold atoms.
Most of the positively charged particles should collide with the foil and stay there because they stick to the negatively charged gold atoms.
Answer:
most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil
Explanation:
What are the independent and dependent variables in this experiment?
Mass is the independent variable, and boiling point is the dependent variable.
Boiling point is the independent variable, and mass is the dependent variable.
There are two independent variables and no dependent variables.
There are two dependent variables and no independent variables.
Answer:
Mass is the independent variable, and boiling point is the dependent variable.
Explanation:
Answer:
A is the answer on edge
Calculate how many atoms are in 98.6 g Carbon (C)?
Can someone help me please
Answer:
unicellular means having one cell and multicellular means having many cell
example of unicellular organism are euglena,amoeba and paramecium
example of multicellular are man,mushroom and
dog
Explanation:
hope it helps you
Is argon made of atoms or molecules?
10. a. What is the binding energy released when an alpha particle of mass 6.64 x 10-27 kg escapes from the nucleus of Uranium- 238? C = 3.00 x 108m/s. Give formula. show substitutions, and answer
Answer:
The binding energy released is 1.992 X 10⁻¹⁸ J
Explanation:
Given;
mass of the alpha particle, m = 6.64 x 10⁻²⁷ kg
speed of the alpha particle, c = 3 x 10⁸ m/s
The binding energy released is given by;
[tex]E_b = mc^2[/tex]
where;
m is mass of the particle
c is speed of the particle
E = 6.64 x 10⁻²⁷ (3 x 10⁸)²
E = 1.992 X 10⁻¹⁸ J
Therefore, the binding energy released is 1.992 X 10⁻¹⁸ J
What is the older name for lanthanides and actinides?
Answer:
inner transition metals
mm, does anyone know this?
What is the smallest division on this balance? 0.1 g 0.01 g 0.001 g 1 g
Answer:0.001g
Explanation:
the number with the most zeros at the beginning is always the smallest
Ibuprofen is a common pain reliever and anti-inflammatory. Its formula is C13H18O2. What percent by mass of ibuprofen is the carbon? (A calculator can be used) A) 75.68 % B) 33.33% C) 13.00% D) 39.39%
Answer:
Explanation:
%Carbon = mass of carbon / mas of C13H18O2) X100%
= 13X12/ (13X12+18+2X16)X100%
= 156/206) X100%= 75.7%
Why does chlorine have a higher ionization energy than aluminum
Convert 16 years to days?
Answer:
16 years = 5840
Explanation:
multiply the time value by 365
Reactant P contains 50 J of energy, and reactant Q contains 35.3 J of energy. The reactants combine to form product PQ, which contains 104 J of energy. What is the energy transformation? Energy is absorbed because the product has more energy than the reactants have. Energy is absorbed because the product has less energy than the reactants have. Energy is lost because the product has more energy than the reactants have. Energy is lost because the product has less energy than the reactants have.
Answer:
Energy is absorbed because the product has more energy than the reactants have.
Explanation:
its A
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Use the drop-down menu to complete the sentence.
When 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called a(n)
.
Answer:
compound :)
Explanation:
Atoms are said to be the smallest unit of substances of a chemical nature. One carbon atom combined with two oxygen atoms results in the formation of a compound. Thus, option B is correct.
What is a compound?A compound is defined as a substance that is made of more than one element and molecules that are different or the same in nature. They get linked together through a chemical bond.
Carbon and oxygen are two different elements that react chemically to form a covalent form between them. As a result, a compound called carbon dioxide is formed.
On the other hand, an element is a pure form of the atom, and isotopes are atoms with identical atomic numbers and different atomic masses. Ions are said to be atoms with charges on them.
Therefore, option B. carbon dioxide is a compound.
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Your question is incomplete, but most probably your full question was, When 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called a(n) A.) Element. B.) Compound. C.) Isotope. D.) Ion.
Difine an exothermic reaction
Answer:
An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat. All combustion reactions are exothermic reactions.
Explanation:
8. Develop a relationship in the form of a single sentence or equation) that can predict the charge based on the number
and types of particle.
Answer:
Charge of an ionic element = Number of protons (p) - Number of electrons (e)
Explanation:
Atoms of elements are made up of three subatomic particles viz: neutron, proton and electron. The proton is the subatomic particle that carries the positive charge (+) while the electron is the subatomic particle that carries the negative charge (-).
The atom of any element is NEUTRAL when the number of protons in its nucleus is equal to the number of electrons surrounding its nucleus. However, an ion (charged atom) arises when there is a difference in the number of protons and electrons in an atom.
The equation to determine the charge an ion will carry is: NUMBER OF PROTONS (p) - NUMBER OF ELECTRONS (e).
This equation shows that an ion will be:
- positively charged if the number of protons is > number of electrons.
- negatively charged if the number of protons is < number of electrons.
Which best explains why their traits are similar to their parent's traits? Choose the answer that best matches your thinking. (Acquired = to obtain or get) *
A. They inherited their traits from their parents.
B. Their traits are acquired, not inherited
C. Their traits are both acquired and inherited.
D. Their traits are neither inherited nor acquired; they come from nature.
Answer: A
Explanation:
Two forces are described below: Force 1: The force with which Earth pulls a person to its center Force 2: The pulling force applied on a door to open it Which statement is true about the forces? A) Both are contact forces. B) Both are non-contact forces. C) Force 1 is a contact force and Force 2 is a non-contact force. D) Force 1 is a non-contact force and Force 2 is a contact force. PLEASE HELP
Answer:
the correct answer is D
Answer:
It is D
Explanation:
Gravitational Force does not implie to have contact or if you want an easier explanation. Gravity doesn't touch you to move you.
Though you do need physical contact to open a door, because you are touching it!
name the five methods used for the formation of salts??
Explanation:
In chemistry, a salt is a chemical compound consisting of an ionic assembly of cations and anions.[1] Salts are composed of related numbers of cations (positively charged ions) and anions (negatively charged ions) so that the product is electrically neutral (without a net charge). These component ions can be inorganic, such as chloride (Cl−), or organic, such as acetate (CH
3CO−
2); and can be monatomic, such as fluoride (F−) or polyatomic, such as sulfate (SO2−
4).
1.Dante loves taking care of the chickens on his farm. He feeds them rice everyday. His Grandma told him that he should feed them corn everyday instead of rice because it will make them grow fatter. He decides to do an experiment to test what type of food will make his chickens fatter. Before the experiment, the chickens weigh an average of 5 pounds. David makes two groups of chicken. He feeds Group A rice everyday, and feeds Group B corn everyday. After on month, David weighs the chickens to see if they gained any weight. Group A weighs an average of 5 pounds and Group B weighs an average of 7 pounds. What is the Dependent (Outcome) Variable of this experiment?
Answer:
The dependent variable is the chicken weight
Explanation:
The experiment was carried out to determine the relationship between the size of chickens and the food with which they are fed.
However, to determine the size of the chickens, the weight of the chickens were taken
The two different experimental treatment was administered separately to the two groups of experimental units
The independent variables are;
1) The type of treatment administered which could be either;
i) Feeding the chickens with corn
ii) Feeding the chickens with rice
2) The duration for which the treatment was administered
The dependent variables is the weight of the chicken after being subjected to one of the two experimental treatments.
how do you do this? do you multiply the two together, and in that case how do you get the finishing unit?
Answer:
divide 25 and hours by 1 hour then 60 mins by (1) then you'll get 60/ 25 then divide the two and you get 2.4 which is 12/5 that should be your answer
HELP please, 50 points 5 minutes timed
Answer:
Coordinate geometry is one of the most important and exciting ideas of mathematics. In particular it is central to the mathematics students meet at school. It provides a connection between algebra and geometry through graphs of lines and curves. This enables geometric problems to be solved algebraically and provides geometric insights into algebra.
The invention of calculus was an extremely important development in mathematics that enabled mathematicians and physicists to model the real world in ways that was previously impossible. It brought together nearly all of algebra and geometry using the coordinate plane. The invention of calculus depended on the development of coordinate geometry.
Explanation:
what makes up the compound H2O?
Answer:
2 hydrogen atoms bonded with 1 oxygen atom
Explanation:
In the compound [tex]H_{2} O[/tex], the number 2 after the H means that there are two atoms in the preceding letter (element), and since there are no numbers ofter the O, that means there is only 1 atom.
The value of the boiling point elevation constant (Kb) depends on the identity of the:_______.
a. solute
b. solvent
c. most important solvent-solute interaction
d. ions formed upon solution of an electrolyte
e. solute and solvent
The value of the boiling point elevation constant (Kb) depends on the identity of the solute and solvent. Thus option E is correct.
what are boiling point and melting point ?The major difference is that the melting point is the temperature at which solid and liquid phases are at equilibrium state, whereas the boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure.
Melting point in which the solid will start melting to become a liquid at a given temperature, the molecules gain enough amount of kinetic energy to overcome the intermolecular forces to convert into another form.
Another term called the freezing point is the temperature at which conversion of a liquid into solid occur.
Boiling point at which , the liquid substance enters into the gaseous phase, when the external pressure is high then a higher temperature for the vapor pressure is needed to become equal to the external pressure.
Thus option E is correct.
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