Answer:
D. 10 individuals emigrate, 4 individuals die, 14 individuals immigrate, 0 individuals are born
Explanation:
hi!
What is the molar mass of a substance?
A. The mass in grams of one mole of a substance
Or
B. The number of particles in one gram of a substance
How many moles are there in 8.50 X 1024 molecules of sodium sulfate, Na2SO3?
Answer:
14.12 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{8.50 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.119601...[/tex]
We have the final answer as
14.12 molesHope this helps you
In an experiment, chemists heated a solid, red substance in a test tube. Vapors from the heated red substance condensed as a metallic liquid on the side of the tube. The red substance eventually disappeared, leaving only the metallic liquid and producing a gas that escaped from the tube. Which statement best describes what happened to the red substance in this experiment?
A.
The experiment demonstrates the formation of plasma from the red substance.
B.
The experiment demonstrates a physical property of the red substance.
C.
The experiment shows that the red substance experienced a chemical change.
D.
The experiment shows that the red substance can be a solid, liquid, or gas.
E.
The experiment shows that the red substance is an element.
Answer:
c
Explanation:
Answer:
C. The experiment shows that the red substance experienced a chemical change.
What will cause an object to move?
This substance can be either homogeneous or heterogeneous.
element
compound
mixture
pure substance
Answer:
I think it's Element and compound
Explanation:
What is the balanced equation for KOH+CO2—>K2CO3+H2O
The balanced equation :
2KOH+CO₂⇒K₂CO₃+H₂O
Further explanationEqualization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:
1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.
2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product
3. Select the coefficient of the substance with the most complex chemical formula equal to 1
Reaction
KOH+CO₂⇒K₂CO₃+H₂O
give coeffiecientaKOH+bCO₂⇒K₂CO₃+cH₂O
make equationK, left=a, right=2⇒a=2
H, left=a, right=2c⇒a=2c⇒2=2c⇒c=1
O, left=a+2b, right=3+c⇒a+2b=3+c⇒2+2b=3+1⇒2b=2⇒b=1
the equation becomes :
2KOH+CO₂⇒K₂CO₃+H₂O
How many valence electrons does an atom of oxygen have and what noble 1 point
gas will it be most like after forming a chemical bond? *
1)8 electrons and neon
2)2 electrons and fluorine
3)6 electrons and neon
4)6 electrons and argon
3)6 electrons and neon
Further explanationIn an atom there are levels of energy in the shell and sub shell
This energy level is expressed in the form of electron configurations.
The electron configuration Oxygen (atomic number = 8) :
1s²2s²2p⁴
Oxygen will try to achieve stability (according to the octet rule) by binding 2 electrons so that the 2p orbits are filled with 6 electrons, so that the configuration is stable like the noble gases Neon
₁₀Ne = 1s² 2s² 2p⁶
8. At higher temperatures _______.
A. particles in an object have less energy
B. particles in an object move faster
C. a gas contracts
D. particles vibrate slowly
Answer:
B. particles in an object move faster
Explanation:
At higher temperatures, particles in an object moves faster.
Temperature is the degree of hotness or coldness of a body.
At higher temperature, the substance is very hot. Temperature is related to the heat energy content of a bodyAs the temperature increases, the average kinetic energy of the particles of system increases more and more. This is in compliance with the kinetic molecular theory of matter. Therefore, at higher temperatures, particles in an object move faster.the moon changing positions causes all of the following except one of these. which is not caused by the moon changing positions?
A. Phases of the moon
B. Eclipse
C. Weather
D. Tides
Answer:
A.phase of moon
I hope it helps you
True or False:
At room temperature and 1 atm, covalent crystals are solid.
a. True
b. False
IV. Provide the chemical Name of below acid or base.
(a) Vinegar
(b) Fruits (orange)
(c) Curd
(d) Lime water
(e) Window cleaner
(f) Soap
V. When ‘X’ is added to ‘Y’ immediately ‘Y” turns to pink. Identify X.
VI. Give examples of a common acid and a common salt. Compare their composition. How do they differ and what do they have in common?
VII. Explain why pickles and jams should not be stored in metal containers.
VIII. Differentiate between weak acid and strong acid.
IX. Explain the reaction involved in the formation of sodium
chloride.
X. Why does a doctor give an antacid to treat indigestion?
Answer:
A)Acetic acid
a)citric acid
b)lactic acid
c)citric acid
d)NH3
f)oxygen hidro-oxide
Explanation:
the boiling points of two liquids are 120°C and 240°C, to what minimum temperature do I have to heat them in order to separate them?
Answer:
120C°
Explanation:
2. How many moles are in 34.0g of Silver hydroxide?
Answer:
0.272 mol AgOH
Explanation:
Figure out the amount of AgOH in mass, and to find the amount of moles–you just divide the given amount (34g) by the molar mass of AgOH (125g) to figure out the amount of moles. 34/125 = 0.272 mol AgOH.
Can someone answer this pleasee it’s free 15 points
I don’t know
but thank u for the points
I need points hehe
Did you know?
Hawaii is the Widest State in America!!!!!!!
________ is defined as average kinetic energy.
A. temperature
B. volume
C. heat
D. pressure
What is the charge that oxygen gets when it becomes an ion?
Answer:
Explanation: Every electron has a single negative(-) charge, the addition of two electrons results in an oxygen ion with a charge of negative(−)2. This is in fact true of every element located under oxygen in the periodic table.
P.S. hope this helps :)
Which statement describes the water gas particles in the air above the cup compared with the water liquid
particles in the cup?
The partides move faster and are closer together
The particles move faster and are far apart
The particles move slower and are closer together
The particles move slower and are far apart
Answer:
The particles move faster and are far apart
Explanation:
A substance may exist in three states of matter; solid, liquid and gas.
In the solid state, there is very strong intermolecular forces between the particles of the substance. They can only vibrate or rotate about their mean positions but can not translate.
In the liquid state, the particles of the substance have a greater degree of freedom than in the solid. The magnitude of intermolecular forces is lower than in solids, the molecules can move at low speeds.
In a gas, the molecules are separated from each other with negligible intermolecular interaction hence they move at very high speed.
Therefore, for the water gas particles in the air above the cup; the particles move faster and are far apart.
How are two atoms of the same element alike?
Is it because they'll have the same make-up and both have the same amount of protons and neutrons??
Answer:
Explanation:
The nucleus of an atom contains neutrons and protons bonded tightly together. The same chemical element can have a different number of neutrons and still be the same element.
What is magnetic force ? How is the this force
4 Sી ભIndSCO
Answer:
Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. ... The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.
Explanation:
brainlest pls
[tex] \huge \boxed{\mathbb{QUESTION} \downarrow}[/tex]
What's magnetic force ?[tex] \huge \boxed{\mathfrak{Answer} \downarrow}[/tex]
Magnetic force is referred to as the force/phenomenon which is exerted by a magnet when they attract or repel each other through the poles. It's produced by an electric charge.There are 2 poles ⇨ i) North Pole & ii) South Pole.The like pole repel each other while the different poles attract each other. Magnetism is also known as magnetism or magnetic attraction. Plz help
A candle burning is an example of
A. an endothermic change
B. a physical change
C. energy being taken in
D. an exothermic change
Answer:
D
Explanation: An exothermic change is Because it has heat.
What is the number of valance electrons for oxygen
Answer:
six
Explanation:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.
Answer:
Six!
Explanation:
Valence electrons are the electrons in the outermost shell of an atom.
someone help with this pls
Answer:
12 B
13
0.00100176
Explanation:
What are the two measurement systems the thermometer uses? Which one is commonly used for science? Why?
Answer:
The two measurement systems that the thermometer uses are Fahrenheit and Celcius. The scientists mostly use degree celsius.
PLS HELP ASAP I WILL GIVE THANKS BUT JUST PLS HELP NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Earth
What is the orbit of the Earth?
Is the Sun at the center of the Earth’s orbit?
Describe the motion of the Earth throughout its orbit? Does it move at a constant speed?
Answer:
The orbit of the earth is a ellipse. Yes. Yes
Explanation:
8
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Which of the following statements is FALSE about the diagrams above?
Diagram B is a mixture of compounds.
Diagram C is a pure substance of a diatomic element.
Diagram D is a mixture of elements and compounds.
Diagrams A&C represent a pure substance of elements.
14 15
Answer:
Diagram B is a mixture of compounds
Explanation:
The false statement about any of the diagram is that diagram B is a mixture of compounds.
Diagram is not a mixture of compounds. It is a single compound in gaseous state .
A compound is a combination of elements in a definite grouping. The properties of the compound is distinct from that of the element that combines to form it. Therefore, since we just a black and yellow circle, the diagram is a compound and nothing more. The other descriptions are perfect.PLEASE HELP ASAP!
The sample of gas is in a container with a fixed volume. A student notices that as the temperature increases so does the
pressure. This is a(n) ___
relationship.
There aren’t any answer choices.
Answer:
Direct
Explanation:
Edge
When the temperature increases with an increase in pressure, it is a direct relationship.
What is Gay Lussac's law?Gay-Lussac's law can be described as when the volume of the gas remains constant then the pressure of a gas is directly proportional to the absolute temperature of the gas.
The mathematical equation of Gay Lussca's law is written as follows:
P/T = k
It can be represented as the pressure is directly proportional to the absolute temperature.
P ∝ T (where 'V' volume of gas is constant)
or
[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2}[/tex]
Where P₁ and T₁ are the initial temperature and pressure while P₂ and T₂ are the final pressure and temperature of the gas.
The sample of gas has a fixed volume of gas and on increasing the temperature the gas molecules acquire more and more kinetic energy. So the pressure of the gas will also increase.
Therefore, there will be a direct relationship between temperature and pressure of gas.
Learn more about Gay Lussac's law, here:
brainly.com/question/11387781
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how many neutrons does this atom have?
A. 4
B. 6
C. 10
D. 14
((help. I'm timed so please be quick ;-;
Answer:
the ander is B. 6 neurons
Answer:
10
Explanation:
Can someone help me please!
What effect does reusing or recycling municipal waste have on environmental resources? Group of answer choices increased use of fossil fuels preservation of raw materials introduction of pollutants into water systems increased deforestation of local areas
Answer:
preservation of raw materials
Explanation:
Reusing and recycling is the process by which the used products are used again or recycled in different form to use it again. Excessive use of the raw materials can lead to their extinction. Recycling the materials helps in decreasing the pollution in the environment. It also helps in reduction in the emission of the harmful gases. When municipal wastes are reused or recycled, the raw materials are preserved. These are the process involved in sustainable use of resources.
The recessive trait disappears in a genetic cross.
True
or
False
Answer:
True
Explanation:
