Answer:
Here^
Explanation:
The matter starts heating, up as if it's ice , turns into a liquid.
Explain why it is important for cells to exchange materials.
Answer:
they need the exchange so they can grow, obtain energy, and get rid of waste. It also helps to mantian a balance of amterials in the cell.
Explanation:
Why does francium react more violently than lithium?
Usually the number of protons matches the number of?
Answer:
Electrons
Explanation:
Elements that are most similarities are located in the same...?
Answer: In the same Group
Explanation: Elements in the same group (row going down) have the same number of valance electrons. These valance electrons dictate their chemical properties and how they react with other elements/compounds.
A system does 125 J of work and cools down by releasing 438 J of heat. The change in internal energy is ____________ J.
Given that,
Work done by the system = 125 J
Energy released when it cools down = 438 J
To find,
The change in internal energy.
Solution,
As heat is released by the system, Q = -438 J
Work done by the system, W = -125 J
Using the first law of thermodynamics. The change in internal energy is given by :
[tex]\Delta U=Q-W\\\\=-438-125\\\\=-563\ J[/tex]
So, the change in internal energy is 563 J.
Ralph wanted to breed a pea plant that produced only purple flowers. He continued to breed purple-flowers producing pea plants together over six generations. The results of Ralph's artificial selection are shown above. What did artificial selection do the population of pea plants?
Answer:
B
Explanation:
Number of purple flowers
Number of white flowers
1
705
224
2
792
189
3
834
102
4
889
84
5
938
21
6
952
0
Ralph wanted to breed a pea plant that produced only purple flowers. He continued to breed purple-flower producing pea plants together over six generations. The results of Ralph's selective breeding are shown above. What did the selective breeding do to the population of pea plants?
A. increased its genetic diversity
B. decreased its genetic diversity
C. caused a new species of pea plant to form
D. caused a pea plant to exhibit a new characteristic
The correct answer would be that selective breeding decreased the genetic diversity of the population of the pea plants.
The genetic diversity of a population can be viewed as the number of genes in the gene pool of the population.
With each successive generation, more purple-flowered and less white-flowered pea plants were being produced until the 6th generation when only purple-flowered pea plants were produced. The ratio of the purple color gene to that of white color kept increasing until there was no longer a white color gene in the population. Hence, the genetic diversity of the population was decreased by the selective breeding.
The correct option is B
What is the formula of the compound vanadium(V) oxide? Use the list of polyatomic ions and the periodic table to help you answer.
A.
VO2
B.
VO5
C.
V5O2
D.
V2O5
E.
V2O2
Answer:
d
Explanation:
Answer:
D. V2O5
Plato Userssssss
What colour will red litmus paper turn if calcium hydroxide and water reacted?
do you want me to try it?
Answer:
Explanation:
blue for base.
Red for ____. What it goes red when in an acidic compound (like coke or pepsi).
So Ca(OH)2 is a base. That means it will turn blue.
what has 9 protons and -1 charge? PLEASE HELP ME
Fluorine, I still remember this from my science fair
Solve it plz?tttttttttttttttttttt
Select all the correct answers.
In this reaction, how does the rate of forward reaction vary with the concentration of the product?
2H,S() =2H() + S(g)
O It increases with an increase in the concentration of S-(g).
OIt decreases with a decrease in the concentration of H().
OIt increases with a decrease in the concentration of H-(g).
It decreases with an increase in the concentration of S,().
It decreases with increase in the concentration of Ha().
The correct answers :
It increases with a decrease in the concentration of H₂(g).
It decreases with an increase in the concentration of S₂(g).
It decreases with an increase in the concentration of H₂(g).
Further explanationForward reaction : rate to form product
In equilibrium :
The product decreases ⇒ system will move from left to right(forward reaction)
The product increases ⇒ system will move from right to left(reverse reaction)
what are two atoms if hydrogen?
Answer:
ummm molecules i have no idea- i tried tho..
Explanation:
is known as a diatomic element hydrogen is the lightest element has an atomic number of one uses the symbol H at standard temperature and pressure hydrogen is an odorless and colorless gas it is combustible and produces water when it burns in air hydrogen is also the most abundant element in the universe with 90% of atoms in the universe being made of hydrogen main sequence Stars such as the sun burn hydrogen as fuel
One effect of uncontrolled diabetes is that the blood might develop an acidic pH. As a result, cells may not be able to regulate their internal pH. Within these cells, this could cause a disruption of the function of biological catalysts known a
From the formula, write the correct name for the ionic compound. MgBr₂ KCl Al₂S₃ BeCl₂ MgCl₂ GaN CaO BaO AgBr 10. NaF SrS LiCl AlP CsI
Explanation:
For binary ionic compound, the compound is named by first writing the cation followed by the anion. The names of the compounds are;
MgBr₂ - Magnesium Bromide
KCl - Potassium Chloride
Al₂S₃ - Aluminium Sulphide
BeCl₂ - Berylium Chlride
MgCl₂ - Magnesium Chloride
GaN - Gallium Nitride
CaO - Calcium Oxide
BaO - Barium Oxide
AgBr - Silver Bromide
NaF - Sodium Flouride
SrS - Strontium Sulphide
LiCl - Lithium Chloride
AlP - Aluminium Phosphide
CsI - Caesium Iodide
Which properties do all solids share?
A. Color and fixed shape
B. Color and fixed volume
C. Fixed volume and fixed shape
D. Fixed shape; volume that depends on container
Answer:
c
Explanation:
because when you hold a solid in your hand does it move does it shift no it stays the same so it doesn't take the form of the container it's in cuz that's a liquid.
What contribution did Niels Bohr make to atomic theory
Answer:
Bohr's greatest contribution to modern physics was the atomic model. The Bohr model shows the atom as a small, positively charged nucleus surrounded by orbiting electrons.
Explanation:
Answer: He proposed a theory for the hydrogen atom based on quantum theory
Explanation:
Which of the following is a physical change:
a. turning solid sodium to and chlorine gas to salt
b. forming a mixture
c. food turning into waste in the intestines
d.burning wood
What are the reactants in a chemical equation located? (20 Points)
A. On the right side of the arrow
B. Below the arrow
C. Above the arrow
D. On the left side of the arrow
on the left side of the arrow
The reactants in the chemical equation located on the left side of the arrow. Option D is correct.
The arrow in the chemical equation represents the direction of the chemical reaction, and it separates the reactants from the products.
A chemical equation is a symbolic representation of a chemical reaction, showing the starting materials (reactants) and the resulting substances (products). The general form of a chemical equation is as follows:
Reactants → Products
Reactants: The reactants are the substances present at the beginning of the chemical reaction. They are the starting materials that undergo a chemical change or reaction to produce new substances. Reactants were written on the left side of the arrow.
Arrow: The arrow in the chemical equation points from the reactants to the products, indicating the direction of the reaction. It symbolizes the transformation of reactants into products during the chemical reaction.
Products: The products are the substances formed as a result of the chemical reaction. They are the new compounds or elements that are produced by rearranging the atoms of the reactants. Products were written on right side of the arrow.
For example, let's consider the combustion of methane (CH₄) in oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O):
CH₄ (methane) + 2 O₂ (oxygen) → CO₂ (carbon dioxide) + 2 H₂O (water)
In this chemical equation, methane (CH₄) and oxygen (O₂) are the reactants, and they are located on the left side of the arrow. The products, carbon dioxide (CO₂), and water (H₂O), are located on the right side of the arrow.
Hence, D. is the correct option.
To know more about reactants here
https://brainly.com/question/14449229
#SPJ2
A diagram represents the life cylce of a frog. The diagram shows that, in a frog...
1) methods of sexually reproduction depends on the species
2) metabolism is the sum of all chemical reactions
3) body structures change during development
4) Offspring always look like the adult
PLEASE HELP AND ANSWER
Answer:
I think 1 option ok basically I am a scientist
Answer:
(3)
Explanation:
The table below shows the elements that mainly comprise each of the four layers of Earth:
Elements in Layers
Layer Main Elements
Crust Oxygen, Silicon
Mantle Iron, Magnesium
Outer Core Iron, Nickel
Inner Core Iron
Which of these elements make up the layer that is 0.2 to 1.1 percent of Earth's total diameter?
Magnesium and Silicon
Iron and Magnesium
Iron and Nickel
Oxygen and Silicon
Answer:
The answer is oxygen and silicon
Explanation:
I took the test and it was right
The answer is oxygen and silicon
help me pleaseee, if you do tyy :)
how many liters are in 20 grams of hydrogen gas?
[tex]\huge\bold{\mathfrak{\purple{A{\pink {n {\green {s{\blue{w{\red{e {\orange {r}}}}}}}}}}}}}[/tex]
Volume of 20 g of hydrogen at normal temperature and pressure (NTP) = 240.55 ml.
[tex]\huge\sf\underline{\underline{\red{❥︎ Thanks}}}[/tex]
The scientific method is a that can be used to answer any . The process begins when a scientist makes an . Then, they do to learn more about the topic and write a . The scientist will and conduct an , eventually coming to a . They will share their with other scientists to help further discovery
Answer:
The scientific method is a process that can be used to answer any questions . The process begins when a scientist makes an observation. Then, they do research to learn more about the topic and write a hypothesis. The scientist will make predictions and conduct an experiment, eventually coming to a conclusion. They will share their results with other scientists to help further discovery.
Explanation:
The Scientific method is process used to observe, predict and explain phenomena around us. It involves a series of steps listed as follows:
1. Making observations: the scientist must be a keen observer of events around him
2. Ask questions: the scientist asks questions based on the observations
3. Form a hypothesis and make predictions: the scientist puts forward a reasonable explanation for the observations known as hypothesis. Predictions are then made and tested upon.
4. Experimentation: experiments are conducted to test the hypothesis and the predictions made.
5. Analysis of data and conclusion: the result of the experiments are analysed and conclusion are then drawn.
6. Communication of results: the results obtained from the experiments are then shared with other scientists to aid further research and discoveries.
can u please answer this for me
Answer:
answer c
Explanation:
Explain how a light can be seen when sent through a colloid mixture, but not a solution.
i have 5 minutes pls help
Atoms was determined to be 143 picometers. What is the percent error of this measured value?
Answer:
9.1% error
Explanation:
Full Question:
A measured value for the atomic radius of platinum atoms was determined to be 143 picometers. What is the percent error of this measured value?how does a tiny seed turn into a tree overtime?
Answer:
A group of cells ready to form roots a stem and the first leaves
3. Write the equation for the reaction of metal with oxygen and non metal with oxygen and then
predict the nature of the substance formed when the oxide of metal and oxide of non metal is
dissolved in water.
Answer:
Acidic Oxides: Acidic oxide are oxides that react with water to form an acid. Acidic oxides are formed by reaction of non metals with oxygen .
[tex]S+O_2\rightarrow SO_2[/tex]
[tex]SO_2+H_2O\rightarrow H_2SO_4[/tex]
Basic Oxides: Basic oxides are oxides that react with water to form bases. Basic oxides are formed by reaction of metals with oxygen.
[tex]2Mg+O_2\rightarrow 2MgO[/tex]
[tex]MgO+H_2O\rightarrow Mg(OH)_2[/tex]
Which factors Cause Earth to experience seasons? Check all that apply
Answer:
what are the options to the question
Answer:
b and c
Explanation:
just took it on edge :)
A. 207 kJ
B. 4730 kJ
C. 9460 kJ
D. 414 kJ
Answer:
[tex]\boxed {\boxed {\sf C. \ 9460 \ kJ}}[/tex]
Explanation:
The formula we must use is given to us:
[tex]q=mL_{vapor}[/tex]
q is the energy, m is the mass, and L(vapor) is the latent heat of vaporization.
The energy is what we calculate and the mass is 2 kilograms. We need to find the latent heat of vaporization, which is on the table.
We know the sample is copper. Find that element on the table, then the third box tells us it's latent heat of vaporization is 4730 kJ/kgNow we know:
[tex]m= 2 \ kg \\L_{vapor}=4730 \ kJ/kg[/tex]
Substitute the values into the formula.
[tex]q=(2 \ kg ) * (4730 \ kJ/kg)[/tex]
Multiply. Note that the kilograms (kg) will cancel each other out.
[tex]q= 2* 4730 \ kJ[/tex]
[tex]q= 9460 \ kJ[/tex]
9460 kilojoules are required to vaporize 2 kilograms of copper.