Answer:True
Explanation:
Which characteristic is a behavior adaptation in birds?
of course migration
Explanation:
if you need help again i'll be there.
Answer:
yea its migration
Explanation:
What is the manipulated variable, responding variable, and controlled Variable
observe different electrolytes in a wet cell that will light a
bulb most brightly.
Answer:
Manipulated/independent variable- DIFFERENT ELECTROLYTES
Responding/dependent variable- BRIGHTNESS OF BULB
Controlled variable- WET CELL
Explanation:
The independent variable, also known as manipulated variable is the variable that the experimenter changes or manipulates in an experiment. In this case where different electrolytes are observed to see which will light a bulb most brightly, the manipulated variable is the DIFFERENT ELECTROLYTES.
Dependent or responding variable is the variable of an experiment that responds to the changes made to the independent variable. It is the variable that is being measured in an experiment. In this case, the BRIGHTNESS OF BULB is dependent on the electrolyte used, hence, it is the responding variable.
Controlled variable or constant is the variable that the experimenter keeps the same throughout the experiment. In this case, the WET CELL is kept constant for all the electrolytes used i.e. it is not changed, hence, the WET CELL is the controlled variable.
covalent compounds contain
Answer: Covalent compounds have bonds where electrons are shared between atoms. Due to the sharing of electrons, they exhibit characteristic physical properties that include lower melting points and electrical conductivity compared to ionic compounds.
hope this helps!
Explanation:
Who arranged the elements according to atomic mass, and used the arrangement to predict the properties of missing elements.
a john dalton
b henry mosely
c dmitri mendeleev
d antoine lavoisier
Answer:
i think it's C
Explanation:
But if it's wrong,im so sorry
Answer:
C.
Explanation:
the answer is C dmitri mendeleev
Help please
What is the equation for density?
O D= m
OD=
m
m
D=
>le Els -
OD=ž
= { mu?
Answer:
It is this below
Explanation:
P = m/v
HELP PLEASEEE!!!
If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current _______.
Answer:
Atomic theory is. A
Explanation:
Subject to change if new information is discovered. B. A solution to the problem of differing isotopes. C. Unchanged able D. A descriptive table that lists all of the element
I hope this answered your question.
.
30 POINTS AND BRAINLIEST IF CORRECT!
When does a polar bond result?
a When opposite charges are formed between ions in a covalent bond.
b When there is an unequal sharing of electrons in an ionic bond.
c When there is an unequal sharing of electrons in a covalent bond.
d When opposite charges are formed between ions in an ionic bond.
Ammonium chloride, ammonium sulfate and ammonium nitrate are used in fertilisers.
Ammonia reacts with nitric acid to make ammonium nitrate.
NH3 + HNO3 → NH4NO3
Calculate the mass of ammonia required to make 5.0 g of ammonium nitrate.
relative formula mass of NH3 = 17
relative formula mass of NH4NO3 = 80
Answer:
1.0625 g
Explanation:
Number of moles in 5g of NH4NO3 = 5.0g/80g/mol = 0.0625 moles
Again the balanced reaction equation is;
NH3 + HNO3 → NH4NO3
So,
1 mole of NH3 yields 1 mole of NH4NO3
x moles of NH3 yields 0.0625 moles of NH4NO3
x = 0.0625 moles of NH3
Mass of NH3 = number of moles * molar mass
Mass of NH3 = 0.0625 moles * 17g/mol
Mass of NH3 = 1.0625 g
Someone help please!
Answer:
D
Explanation:
Which phrase describes a typical feature of plains?
usually have a high relief
have steep sides
usually have a high elevation
can be interior
Answer:
Usually have a low relief, can be interior, and can be coastal.- are phrases that describe typical features of plains.
The phrase describes a typical feature of plains can be interior.
What is interior?The art as well as the science of improving the interior of the building to provide a healthier as well as more aesthetically pleasing environment for people who use it is known as interior design.
Plains are known for their low relief, interior location, as well as coastal location, all of which are characteristics of plains.
Therefore, The phrase describes a typical feature of plains can be interior.
To know more about interior.
https://brainly.com/question/11951339
#SPJ2
How many moles are contained in 539.2 grams of Al(NO3)3
Answer; 2.531 moles
Explanation:
What advantage does cross pollination have over self-pollination?
1. It allows a plant to have both male and female flowers.
2. It assures that there is genetic variety within each plant species.
3. It ensures that all offspring will be identical.
4. It allows a plant to fertilize itself.
Answer:
It allows all the plants to have one genetic
Write a summary paragraph explaining limiting and excess reactants and how you can tell which is which.
Will mark as Brainliest if it's correct and if it's not copied and pasted from the internet :)
This is an unbalanced equation representing a chemical reaction HgO->Hg+O2 (two is supposed to be small and on the bottom right part of the O) Which equation is the correctly balanced chemical equation for this reaction? A. HgO->Hg+20 (and a tiny 2 next to the 20) B. 2Hgo->Hg+0 (and a tiny 2 next to the 0) C. 2HgO->2Hg+0 (and a tiny 2 next to the 0) D. 2Hgo->Hg+20 (and a tiny 2 next to the 20)
Answer: C. [tex]2HgO\rightarrow 2Hg+O_2[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The skeletal chemical equation will be:
[tex]HgO\rightarrow Hg+O_2[/tex]
The balanced chemical equation will be:
[tex]2HgO\rightarrow 2Hg+O_2[/tex]
The correctly balanced chemical equation for the reaction [tex]HgO - > Hg + O_{2}[/tex] is: C. [tex]2HgO - > 2Hg + O_{2}[/tex]
The law of conservation of mass states that mass can neither be created nor destroyed; it can only be transferred from one location to another. As a result, the mass of the products is required to be the same as the mass of the reactants.
On both the reactant and product sides of the reaction, the identical amount of atoms of each element is required. Therefore, the equations used in chemistry are balanced.
Learn more about balanced equation, here:
https://brainly.com/question/31242898
#SPJ6
1. What mass of Mgo will I make from 48 g of Mg?
2Mg + O2 + 2MgO
Answer:
80.6 g
Explanation:
MgO=24.3+16=40.3 g
48.6/24.3= 2 moles
64/2x16= 2 moles
2x40.3= 80.6g
The electron has a negative charge.
True
False
Answer:
true :)
Explanation:
have a great day!!
Which of the following best describes tides.
2 points
periodic rise and fall of the water level in the oceans and other large bodies of water.
large waves that crash onto the beach.
ripples in the water that make the water go up and down.
none of the above
What determines whether a material melts or burns when heated?
The combustion temperature of a material determines whether a material melts or burns
Materials whose combustion temperatures are lower than their melting point gets burnt instead of melting, because before the temperature of the material is raised up to the melting point temperature, the materials gets combusted at a lower temperature known as the combustion temperature
Melting is physical change and is controlled by the physical property ( melting point ) while burning is chemical change which is irreversible.
Hence we can conclude that The combustion temperature of a material determines whether a material melts or burns
what is hybridization
HYBRIDIZATION:
Hybridization is the idea that atomic orbitals fuse to form newly hybridized orbitals, which in turn, influences molecular geometry and bonding properties. Hybridization is also an expansion of the valence bond theory.Answer:
Hybridization is the idea that atomic orbitals fuse to form newly hybridized orbitals, which in turn, influences molecular geometry and bonding properties. Hybridization is also an expansion of the valence bond theory
the law of conversation of mass states that the mass of the reactant is ___ the mass of products
Answer: equal to
Explanation:
Which type of fertilization is common with animals that live in the water?
1. external fertilization
2. sexual
3. internal fertilization
4. asexual
External fertilization in animals usually occurs in water or in damp areas in a process called spawning.
How many moles of water are produced from the reaction of oxygen with four moles of propane (C3H8)? C3H8 + 5O2 --> 3CO2 + 4H2O
Answer:
Explanation:
The reaction is:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
We see, that the equation is ballanced.
As we have data from only one reactant, we assume the other is in excess.
Ratio is 1:4 (stoichiometry). We solve this, by a rule of three:
1 mol of propane can produce 4 moles of water
Then, 4 moles of propane, may produce
( 4 . 4 ) /1 = 16 moles of water can be made.
Remember, we always have to work with the limiting reactant.
How would an apple, potato, and onion all taste the same?
A) plugging your nose
B) Chewing on mint gum in intervals
C) eating them at the same time
Answer:
A) plugging your nose
This is because of your olphactory bulb being blocked. This is the series of nerve endings in your nose, that not only allows you to smell, but to taste at the same time.
Why does heating an object increases its thermal energy?
Answer:
the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.
is soil a producer, decomposer, or consumer
The Beryllium (Be) atom has 4 protons, 4 electrons (2 valence e- ), and 5 neutrons. It is on the 2nd period, so it has two electron shells
(diagram below)
1. has two electron shells, so draw two rings around the nucleus
2. has 4 electrons, and since the first shell always has two the second shell would have 2 as well (to add up to four). this makes sense, because the description says that Be has 2 valence electrons
3. Draw 4 protons inside the grey circle (the nucleus)
4. Draw 5 neutrons inside the grey circle too (the nucleus)
they don't have to be in any particular order, hope this helps!
Beryllium (Be) atom has 5 neutrons, 4 electrons and 4 protons. It has two electron shells as it is in the second period of the periodic table.
Only two electrons can fit in the first shell, which is the innermost shell. Beryllium has two electrons in its initial shell. There are additionally 2 electrons in the second shell, which is the outermost shell for beryllium. Valence electrons are the moniker for these outermost electrons.
The electron configuration of beryllium is 1s² 2s², where the superscript refers to the number of electrons in each orbital and shell. The two electrons in the 1s orbital of the first shell are denoted by the symbol 1s², while the two electrons in the 2s orbital are denoted by the symbol 2s².
Learn more about electron configuration, here:
https://brainly.com/question/29157546
#SPJ6
Has 3 valence electrons and 4 energy levels ?
You are looking for an element in the fourth period and a transition metal. As most have about 3 valence electrons. Gallium and Scandium work perfectly.
Answer:
Gallium is the Answer.
Explanation:
Any kind of help would be nice :)
Answer:
1st page, number a-ENergy is added or absorbed
I cant see the answers on the 2nd page
Explanation:
Answer:
1. A gas is released.
2. Energy is absorbed.
3. Color change.
4. Energy is given off.
5. Change in odor.
Explanation:
Kate and Janie are about to pour water into a beaker when they notice
the beaker has a crack at the bottom. What should the students do
with the beaker?
Answer:
Put the beaker in the broken glassware disposal and replace the beaker
Explanation:
Any beaker which has a crack could break/shatter if you apply heat. Also, cracked glassware is a lab safety hazard.
Which statement is correct about the water cycle?
1)Precipitation is when water flows into the ground
2)Condensation is when liquid water becomes a vapor
3)The water that exists on planet Earth now is the same water that existed during the age of the dinosaurs
4)Transpiration is water running of the surface of the ground
Answer:
precipitation is when water flows into the ground
Explanation:
.................