Answer:
The cell's nucleus controls the activities of a cell and carries genes that contain information.
what might be a formula for calculating distance
Answer:
Distance = speed * Time
hope it helps
Answer:
Distance formula (x2 - a1) ° + (y2 - Yı)?
d - d = distance
(x1, Y1) coordinates of the first point
(x2, Y2) = coordinates of the second point
what is biopolymer ?
Answer:
Biopolymers are natural polymers produced by the cells of living organisms. Biopolymers consist of monomeric units that are covalently bonded to form larger molecules. There are three main classes of biopolymers, classified according to the monomers used and the structure of the biopolymer formed: polynucleotides, polypeptides, and polysaccharides.
Explanation:
how did the periodic table get its name?
a. the periodic table got its name from the way the elements are arranged in periods called groups.
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
c. the periodic table got its name from the way the elements are arranged in rows which are called periodic groups.
d. the periodic table got its name from the way the elements are arranged in rows which are called groups.
Answer:
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Answer:
b
Explanation:
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
is there a relationship between the relative age of stars in the number/identity of element is found within them
Yes. Stars use fusion to create nuclear energy, which is what makes them "alive". The older they are, the "bigger" the element in them is. Hydrogen turns into Helium, and when hydrogen is used up, the helium starts fusing into bigger elements. it stops at iron however. Once stars start fusing silicon to iron, it is doomed because it takes more energy than it gives off.
When explaining chemical reactions to a friend, Brianna models a reaction by taking several colors of modeling clay and making a sculpture of a horse. Which type of chemical reaction is Brianna most likely explaining?
Explanation: Here are the different coloured that are used to join and make one piece this method that Brianna is following is called synthesis.
Question 5
4
What type of plate boundary involves plates moving away from each other?
convergent
divergent
transform
Answer:
A divergent boundary!
Explanation:
A divergent boundary occurs when two plates move away from each other, while a convergent boundary is when two plated collide. And a transform plate boundary is when two plates horizontally slide against each other.
I hope this helps! ^^
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Answer:
The answer is Divergent boundaries
please help me out i will give you brainlist. 0.500 is wrong
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Work Shown:
Using the periodic table, we see that
1 mole of carbon = 12 grams1 mole of oxygen = 16 gramsThese are approximations and these values are often found underneath the atomic symbol. For example, the atomic weight listed under carbon is roughly 12.011 grams. I'm rounding to 2 sig figs in those numbers listed above.
So 1 mole of CO2 is approximately 12+2*16 = 44 grams. The 2 is there since we have 2 oxygens attached to the carbon atom.
-------------------
Since 1 mole of CO2 is 44 grams, we can use that to convert from grams to moles.
11.0 grams of CO2 = (11.0 grams)*(1 mol/44 g) = (11.0/44) mol = 0.250 mol of CO2
In short,
11.0 grams of CO2 = 0.250 mol of CO2
This is approximate.
We don't need to use any of the information in the table.
Answer:
.250
Explanation:
A thermochemical equation indicates the absorption or release of heat in addition to the reactants and products involved in the chemical reaction. The amount of energy available for conversion into heat is represented by a triangle H does this term stand for?
Answer:
A. Enthalpy of the reaction
Explanation:
A Thermochemical equation is a balanced stoichiometric chemical equation that indicates the absorption or release of heat in addition to the reactants and products involved in the chemical reaction. The amount of energy available for conversion into heat is represented by ΔH, a this term which stands for the enthalpy change, ΔH.
The Enthalpy of Reaction or Heat of Reaction is the amount of energy in the form of heat transferred during a chemical reaction that occurs at a constant pressure. It is useful for calculating the amount of energy per mole either released or produced in a reaction, therefore is unit is kJ/mol.
In a reaction where energy is absorbed by the reactants during the formation of products, ΔH is positive. On the other hand, in a reaction where energy is released by the reactants during the formation of products, ΔH is negative.
The enthalpy change, ΔH of reactions are determined experimentally under standard conditions of 1 atm and 25 °C (298.15K). Enthalpy can be measured experimentally through the use of a calorimeter. A calorimeter is an isolated system which has a constant pressure and in which heat loss to the surroundings is minimal.
A sample of an oxide of nitrogen is found to contain 30.4% nitrogen. What is its empirical formula?
Answer:
If nitrogen = 30.4% then oxygen = 100-30.4 = 69.6%
divide each % value by atomic mass
N = 30.4/14 = 2.17
O = 69.6/16 = 4.35
Divide each y smaller:
N = 2.17/2.17 = 1
O = 4.35/2.17 = 2
Explanation:
"The empirical Formula will be [tex]NO_{2}[/tex]."
What is empirical formula?
In chemistry, an empirical formula is the simplest thought of the entire number quantity of atoms in a molecule.
It is given that N = 30.4%.
The % of O can be determined as: 100-30.4%= 69.65.
Now, after dividing % value with atomic mass, we get.
Mass of N= 14 and Mass of O = 16.
N= 30.4/14= 2.17
O = 69.6/ 16= 4.35
It can be seen that N has less number as compared to O . So, divide each with 2.17.
N= 2.17/2.17 = 1
O = 4.35/2.17=2
So the empirical formula will be [tex]NO_{2}[/tex].
To know more about empirical formula click here.
https://brainly.com/question/21280037.
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What evolution was evident in Darwin's finches?
1. beak type
2. leg muscles
3. wing span
4. eyesight
Answer:
sorry I don't know the answer hope you understand
What is the formula for CNHO
Answer:
this is basically structure of iso cyanic acid
iron (ii) hydroxide + sodium nitrate. Name the precipitate formed in reaction
What is the name for: CO2?
AND
Describe the steps for how you determined this.
Answer:
carbon dioxide
C = carbon
O2 = dioxide
First question and I'm already stuck. Help pls!
Answer:
definite volume. indefinite shape
Answer:
Red
Explanation:
Definite volume, indefinite shape
What is the proper name for the chemical formula Cl4O5?
Answer:
Carbon tetraiodide
Explanation:
let me know if it works
Al +CI = Al CI3
how do i solve this
Which of the following is a property of a non-metal.
luster
ductile
malleable
does not conduct heat and electricity
Answer:
luster
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What is the VSEPR shape of BHI2?
a.) bent
b.) trigonal planar
c.) trigonal pyramidal
d.) tetrahedral
e.) linear
Answer:
The answer is B
Explanation:
honestly do
write the ground state electronic configuration of an atom having atomic mass number 37 and number of neutrons 20.
Answer: The ground state electronic configuration of an atom having atomic mass number 37 and number of neutrons 20 is [tex]1s^22s^22p^63s^23p^5[/tex]
Explanation:
Atomic number is equal to the number of protons.
Mass number is the sum of number of neutrons and number of protons.
Mass number = number of neutrons + number of protons
37 = 20 + number of protons
number of protons = 17
The atomic number is specific to an element, and the element with atomic number 17 is chlorine.
Electronic configuration represents the total number of electrons that a neutral element contains.
[tex]Cl:17:1s^22s^22p^63s^23p^5[/tex]
HELP ASAP PLS AHHH ty
Answer: a for the first one , d for the second one, b for the third one.
Explanation:
Answer:
A: Main sequence star.
B: White Dwarf.
C: Black hole.
Explanation:
Brainliest please.
where did all the elements in the universe come from?
Answer:
Wal-mart XDDDDD
Explanation:
18.The Halogen family of elements all have 7 valence electrons. Which column would they be in?
a.01 (IA)
b.02 (IIA)
c.4 (IVA) or 14
d.7 (VIIA) or 17
Predict the approximate molecular geometry of a formaldehyde molecule:
Answer:
trigonal planar geometry
Explanation:
The molecule, formaldehyde , has three regions of electron density around the molecule. The carbon atom is the central atom in the molecule of formaldehyde.
Recall that each bond around the central carbon atom in formaldehyde- both single and double are counted as a single region of electron density. Molecules having three regions of electron density around the central atom have a trigonal planar geometry.
Which type of organism is responsible for performing the majority of nitrogen fixation?
Answer:
B. bacteria
Explanation:
they are responsible for the fixation of nitrogen
Answer:
the answer is B bacteria
Which of the following is true about the electron configuration of the noble gas
A. The highest occupied s and p orbitals are partially filled.
B. the highest occupied s and p orbitals are completely filled.
C. the electrons with the highest energy are in a f sub level
D. the electrons with the highest energy are in a d sublevel
Answer:
Noble gases have very stable electron configuration and does not need to gain electrons, only when they gain energy. 1) For example, krypton is a chemical element with symbol Kr and atomic number 36, which means it has 36 protons and 36 electrons.
Answer: I think it’s B, The highest occupied s and p sub levels are completely filled.
Explanation:
10. Johnny pushed a wheel borrow that was 50kg, if the net force on the
wheel borrow is 15N east, what is the wheel borrows acceleration?
Question 8
Which one of the following salts does not contain water of crystallisation?
Answer:
pb
Explanation:
dosn't contain water of crystallization
What is the mass of a liquid that has a density of 124 g/mL and takes up a volume of 18 mL. What mass should the liquid have? (round you answer to the nearest hundredth)
which element has a smaller atomic radius than strontium (Sr)?
it is tecnically magnesium,
Answer:
barium is the answer
ssignment Vhat challenges would have existed in the spread of Christianity. pe overcome. Remember social media and cell phones did not exis R < previous
Answer:
A lot of people rejected it outright. Christians were persecuted and killed for their beliefs, and there were no cars, etc for easy transportation. Most people had to walk everywhere since horses and the like were only for the rich and royal. Hope this helps, please give me brainliest :)
Explanation:
Answer: Your not the best a spelling...
Explanation: