Answer:
a
Explanation:
Answer:
The answer is
B. They all are eukaryotes.
Hope it will help :)
Can you divide equation II by another factor and still have it be correct? Why or why not?
Answer:
No. You can not simplify a coefficient of.
Explanation:
:)
what is haemoglobin? Name its function.
Answer:
Haemoglobin is the red pigment which is present in our blood and helps in transporting oxygen to different parts of our body.
Hope it helps
Answer:
Haemeglobin is a red substance that has the function of transporting oxygen into the blood.
Explanation:
Compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07% Write the molecular formula of X .
Answer: N2F4
Explanation:(NF2)x2 = N2F2
The compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07%, then the molecular formula of X is N2F4.
What is molecular formula?Molecular formula is defined as a chemical formula that give the total number of atoms of each elements in each molecule of a substance.
It can also be defined as a phrase that specifies the number of atoms of each element in a complex molecule.
It represents the actual number of each atom in a molecules.
It tells us which atoms and how many of each types of atoms are present in a molecule.
NF2 x 2 = N2F4
Thus, the compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07%, then the molecular formula of X is N2F4.
To learn more about molecular formula, refer to the link below:
https://brainly.com/question/28647690
#SPJ2
what mixture is salt and water?
a.solutions
b.colloids
c.suspensions
HCO3− + H2S → H2CO3 + HS−
In the reaction above, what is the Bronsted-Lowry acid?
Answer:
H₂S is the proton donor => Bronsted Acid
Explanation:
Could anyone just suggest questions to practice using Faraday's Law?
Answer:
just to get points
Explanation:
How many valence electrons does the following element have? 1s2 2s2 2p6 3s1
the more massive an object is, the more
Answer:
it have more more mass, gravitational potential energy
Explanation:
15) When dilute sulfuric acid is added to zinc metal the products of the reaction are
A zinc oxide + water + hydrogen
B zinc oxide + hydrogen
C zinc sulfate + water + hydrogen
D zinc sulfate + hydrogen
when combined the two substances together in the cup, the product can be described as a ____ or ____ (there are two possible answers . you just need to choose one )
1. white gas
2. white liquid
3. white solid
what is condensation transfer of energy?
Answer:
Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.
Hopefully this helped :)
How many molecules are in 7V205?
Answer:
Calculate the number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4
Explanation: Hope this helps
NEED ASAP!! WILL GIVE BRAINLIEST!! Only have 10 minutes left please help.
3. (50 points) What is the mass of 80.0L of Oxygen gas (02) at 2 atm and 50 ° C in temperature? Mass should be in units of grams.
Show work!
Answer:
i just feel rlly bad that you need it now, i cant help but all i can say is you got this mate
according to periodic trends which element would have more valence electrons than sulfur
Answer:
Chlorine,Argon
Explanation:
All the elements of group 18 and group 17
The periodic table depicts the various elements arranged based on the increasing order of their atomic numbers. Argon and chlorine will have more valence electrons than sulfur.
What is the periodic trend of valence electrons?A valence electron is an electron of an atom present in the outermost shell that participates in bond formation. The valence electrons are the same in elements placed in the same group or family.
The number of valence electrons increases in a horizontal row called the period of the periodic table. As when one moves from left to right in a period the valence electron increases.
The number of valence electrons in a sulfur atom is 6, whereas in chlorine is 7 and in argon is 8. As chlorine and argon are placed after sulfur in a period will have more valence electrons.
Therefore, argon and chlorine have more valence electron than sulfur.
Learn more about the trend of valence electrons here:
https://brainly.com/question/15098014
#SPJ6
2 Write a word equation and
a symbol equation for the
reaction of solid zinc oxide
(ZnO) with sulfuric acid.
Answer:
Zinc oxide is react with sulphuric acid to give zinc sulphate and water.
zinc oxide +sulphuric acid ⇒ zinc sulphate + water
Zno +H2So4 ⇒ZnSo4 + H2O
SULPHURIC ACID = H2SO4
ZINC SULPHATE =ZnO
Explanation:
What colour change would you notice with China rose indicator when you add it to soap water and vinegar?
what are the elements in the first period
Answer:
Explanation:
There are only two elements in the first period: hydrogen and helium. We can explain why there is less elements in the first row in modern theories of atomic structure.
Answer:
"Hydrogen and Helium". Hydrogen and Helium are the elements of the first period in the modern periodic table.
Explanation:
How many times as bright as a light that is 90 m away from you does a light that is 10 m away from you appear?
Answer:
81 x as bright
Explanation:
The intensity of light is dependent on distance according to this simple equation:
(90/10)^2 = 9^2
= 81
This was derived from the inverse-square law. Respectively a light that is 10 m away from you is 81 x as bright.
what is the mass of 0.75 mol of hydrogen sulfide
Answer:
25.56066
Explanation:
hope this helps !!!!!!! and sorry if it doesn't help
hiiii everyone my previous account has been deleted who knows me plz follow
Answer:
okie!
Explanation:
Answer:
ok i. d k u but thnaks for points ill follow u anyways lol
Explanation:
Molar Concentration of H2O+ lons
in Four Solutions
Solution Molar Concentration
of H3O+ lon
(M)
A 0.1
B 0.01
с 0.001
D I’m 0.0001
Which solution has the highest pH?
Answer:
d
Explanation:
because it’s moving the most spots to the left
The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. Here among the given solutions, the solution D has the highest pH. The correct option is D.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. The pH scale is introduced by the scientist Sorensen. It is more easy to express the concentration of H₃O⁺ using this method.
The equation used to calculate the pH of the solution is given as:
pH = -log[H₃O⁺]
For 0.1 M
pH = -log[0.1] = 1
For 0.01 M
pH = -log[0.01] = 2
For 0.001 M
pH = -log[0.001] = 3
For 0.0001 M
pH = -log[0.0001] = 4
So solution D has the highest pH which is 4.
Thus the correct option is D.
To know more about pH, visit;
https://brainly.com/question/27945512
#SPJ2
What percentage of animals are invertebrates?
1. 50%
2. 25%
3. 95%
4. 5%
Answer:
3. 95%
Explanation:
Invertebrates make up over 95 percent of the Earth's animal species. For many years, invertebrates have been kept as pets, displayed in aquariums and zoos, used for research, and consumed.
Answer:
95% i took the test
Explanation:
the atoms in the same period on the periodic table all have what ?
A - The same abbreviation
B - The same number of electron shells
C - the same number of electrons
D - the same number of electrons on the outer energy level
Answer:
B.
Explanation:
A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
NaCl + NH3 + CO2 + H20 NaHCO3 + NH4CI
Which Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation?
Option (1) represents the Lewis electron-dot diagram correctly containing nitrogen in the equation.
Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.
Valence electrons are given by hydrogen atoms = [tex]1\times3=3[/tex]
Valence electrons are given by nitrogen atom = [tex]5\times1=5[/tex]
Total valence electrons = 3 + 5 = 8
So, the calculation above is shown only the first option. So, (1) Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation.
To know more about:-
brainly.com/question/20300458
Lions eat antelopes. Antelopes eat plants.
A lion is eating an antelope.
Which of these statements correctly describes what is happening when a lion eats an antelope?
A carnivore is eating its prey
B herbivore is eating its prey
C predator is eating a carnivore
D prey is eating a herbivore
Answer:
A
Explanation:
lions only eat meat, antelopes are prey
Select the correct answer.
Copper carbonate (CuCO3) reacts with hydrochloric acid (HCl) according to this equation:
CuCO3(s) + 2HCl(aq) → CuCl2(aq) + H2O(l) + CO2(g).
Which statement correctly describes the substances in this reaction?
A.
Exactly one product and two reactants are either liquid or dissolved in water.
B.
Exactly one of the reactants is in a water-based solution, but none of the products are.
C.
The reactants include both a liquid and a gas.
D.
Exactly one reactant is a solid, and exactly one product is a gas.
E.
The products include a solid, a liquid, and a gas.
Answer:
I think the answer would be option d.
hope it helps.
which alkaline earth metal is the components of quick lime
Answer:
Calcium
Explanation:
is a silver-gray metal which takes its name from the Latin word calx, which means lime. It is the fifth most abundant element in the earth's crust and is widely distributed as limestone (CaCO3), quicklime (CaO) and calcium fluoride.
Alkaline earth metals are present on the left of the periodic table. Therefore, calcium is the alkaline earth metal is the components of quick lime.
What is metal ?Metals are those elements which is hard, conduct electricity, ductile, lustrous and malleable.
The properties of metals are:
1.Since metals have free electrons that's why they can conduct electricity
2. Since atoms in metals are very closely packed in a definite crystal so these are solid. It is not brittle that is it can not be broken down easily
3. It does not react with water easily.
4.It is denser than water hence it sink in water.
The formula for quick lime is quicklime (CaO). The alkaline earth metal that is component of quick lime is calcium Ca. Quick lime is used in white washing.
Therefore, calcium is the alkaline earth metal is the components of quick lime.
Learn more about the metals, here:
https://brainly.com/question/27859211
#SPJ6
If the temperature of a gas is 27.0°C when the volume is 1.25 L, what will the new volume be if the temperature is raised to 150°C?
Answer:
0.17166666666
Explanation:
Answer:
New volume V2 = 1.7625 L
Explanation:
Given:
Old temperature T1 = 27°C = 27 + 273 = 300 K
Old volume V1 = 1.25 L
New temperature T2 = 150°C = 150 + 273 = 423 K
Find:
New volume V2
Computation:
V1 / T1 = V2 / T2
1.25 / 300 = V2 / 423
New volume V2 = 1.7625 L
how many atoms are there in 6.4 moles of H2?
Answer:
7.71 ×10²⁴ atoms (3 s.f.)
Explanation:
Please see the attached picture for the full solution.
☆ or number of atoms, or fundamental units
(this is sometimes written as number of particles)
Further explanantion:
(☆:) Here, we are looking at the number molecules since H₂ is a molecule.
1 mole of a substance is the amount of substance which contains the same number of particles. Thus, when using Avogadro's Constant, the units that we are looking at follows the units of the question. Then, look at what the question is asking for and answer accordingly.
The 2nd picture shows an example of another molecule, H₂O.
Some other examples would be:
1 mole of Na (an atom) --- 6.022 ×10²³ atoms
1 mole of CO₂ (a molecule) --- 6.022 ×10²³ molecules
1 mole of Na+ --- 6.022 ×10²³ ions
Thus, if we look at the 2nd image again, we can say that 1 mole of H₂O contains 6.022 ×10²³ molecules since H₂O is a molecule. However, if the question is asking for the number of atoms, it is not right to say that there are 6.022 ×10²³ atoms. Instead, there are 1.2044 ×10²⁴ H atoms and 6.022 ×10²³ O atoms, giving us a total of 1.8066 ×10²⁴ atoms in 1 mole of H₂O.
Aqueous sodium hydroxide forms a light blue precipitate. What is the formula of the blue precipitate?
Answer:
Cu2+(aq) + 2OH-(aq) => Cu(OH)2(s)
Explanation:
Use of aqueous sodium hydroxide is a precipitation reaction to test for anions or cations. Aqueous sodium hydroxide in a precipitate test forms a insoluble precipitates along with some colors characteristics.
Aqueous sodium hydroxide (NaOH) when mixed with copper(II) (Cu2+) forms a blue precipitate. The formula is as follows:
Cu2+(aq) + 2OH-(aq) => Cu(OH)2(s)