Answer:
28 chromosomes
Explanation:
The elephant egg cells will have just half of the original number of chromosomes which is 28 chromosomes.
The other zygote which is the male sperm will also contain 28 chromosomes.
Reproductive cells the egg and the sperm contains a haploid number of cells. During fertilization the cells combine to form a complete diploid where both the male and female genetic material are replicated. This way half of the original chromosome number are taken through to the sex cells.
Calculate the density of chloroform
Answer: The density of chloroform is 1.47 g/mL
Explanation : Given,
Volume = 40.5 mL
Mass of cylinder = 85.16 g
Mass of cylinder and liquid = 145.10 g
First we have to calculate the mass of liquid (chloroform).
Mass of liquid = Mass of cylinder and liquid - Mass of cylinder
Mass of liquid = 145.10 g - 85.6 g
Mass of liquid = 59.5 g
Now we have to calculate the density of liquid (chloroform).
Formula used:
[tex]Density=\frac{Mass}{Volume}[/tex]
Now putting g all the given values in this formula, we get:
[tex]Density=\frac{59.5g}{40.5mL}[/tex]
[tex]Density=1.47g/mL[/tex]
Therefore, the density of chloroform is 1.47 g/mL
please help!!!
Decide which molecules in the simulation will represent the substances from the actual reaction. Include a strategy to deal with the difference in structure between the actual reaction N2 + 3H2 ⇌ 2NH3 and the simulated reaction. Not all molecules need to be used.
Answer:
I FINNALY GOT MY HANDS ON THE AWNSER, dont
copy word for word though Explanation:
Simulation of a reaction is a chemical reaction modeling or demonstration tool, using various software to better understand the molecular structure and the physical and chemical properties of the molecule. Here the actual reaction is N2 + 3H2 -----> 2NH3. In the simulation reactions, the nitrogen and hydrogen molecules in the actual reaction are described by different colored circles or dots and the bonds are produced using a single, double or triple line that touches each molecule and gives an appearance like the reactants and the products' ball and stick model. Example: Molecule of nitrogen as o---triple line---o. A molecule of hydrogen as O———O. Chemical symbols such as N and H are expressed in Actual Chemical Reaction, N2 and H2 and the bonds are represented by single, double or triple lines that do not impact the atoms in the molecule as follows: Nitrogen Molecule: N -triple Bond- N. Hydrogen Molecule: H - H.
How is the weather in the two cities pictured most likely going to change in the next 24 hours
Answer:
theres no picture
Explanation:
Which of these statements is true?
A Rocks can only change on the earth's surface
B Rocks can change from one type to another
C Rocks can only change inside the earth
D Rocks never change
Answer:
B
Explanation:
which kind of substances get involved in a double displacement reaction?
A) only elements
B) covalent compounds
C) ionic compounds
Answer:
C) ionic compounds
Explanation:
Only ionic compounds takes place in a chemical double displacement reaction.
The reaction involves an actual exchange of partners to form a new compounds.
These compounds involved are ionic compounds.
there is usually the formation of an insoluble compound called precipitatethere is formation of water or any other non-ionizing compoundthere is liberation of a gaseous productP.S. This is a science question not a chemistry.
When the tilt of the Earth causes the sun’s energy/light to be spread out over a larger area, temperatures are ____________ causing ____________ to occur.
A. the same, Spring
B. warmer, Summer
C. cooler, Winter
Answer:
B) When the tilt of the Earth causes the sun’s energy/light to be spread out over a larger area, temperatures are ______warmer______ causing _____Summer_______ to occur.
How many magnesium bromide formula units are there in 1.5 moles of MgBr2
Answer: The answer is 0.0054314469917931, I'm pretty sure.
The empirical formula of the compound is called the formula unit in chemistry. In 1.5 moles of magnesium bromide, [tex]9.03\times 10^{23}[/tex] formula units are present.
What are moles and formula units?Moles are the measuring units of the molecules, atoms, and other particles of the chemistry. Formula units of any substance can be estimated as the product of the moles and the Avogadros number.
The number of the moles present of the magnesium bromide is 1.5 mol and the value Avogadro number is [tex]6.02 \times 10^{23}.[/tex]
If 1 mole of the substance contains [tex]6.02 \times 10^{23}[/tex] formula units, then, formula units in 1.5 moles are:
[tex]\begin{aligned} & = 1.5 \times 6.02 \times 10 ^{23}\\\\& = 9.03 \times 10^{23} \end{aligned}[/tex]
Therefore, [tex]9.03 \times 10^{23}[/tex] formula units are present in 1.5 moles of magnesium bromide.
Learn more about formula units here:
https://brainly.com/question/836231
Please help!!! Need answer fast.
Determine the mass of 7.06 × 10^23 atoms Cl.
Answer in units of g.
^ tap to see the full pic
Explanation:
you make use of the formulas
amount(mol) = number of particles ÷ 6.02 × 10^23
and
mass(g) = amount(mol) × molar mass
What does the "129" represent in the following notation? *
Te-129
What is the mass of 4.50 moles of magnesium chloride, MgCl2?
Answer:
427.5g
Explanation:
Given parameters:
Number of moles = 4.5moles
Unknown:
Mass of MgCl₂ = ?
Solution:
To solve this problem;
Mass = number of moles x molar mass
Molar mass of MgCl₂ = 24 + 2(35.5) = 95g/mol
Mass = 4.5 x 95 = 427.5g
Calculate the number of formula units in 1.87 mol of NH4Cl
a
1.13 x 1024 NH4Cl
b
1.88 x 1023 NH4Cl
c
6.75 x 1024 NH4Cl
d
1.12 x 1024 NH4Cl
Answer:
c is your answer
Explanation:
So, 53.49 g (M) of NH4Cl N H 4 C l contains 14.01 g (m) of N . So, the mass percent of nitrogen in NH4Cl N H 4 C l is 26.19%.
Can you pls help me. TY!
What is the probability of a
short plant in the cross
between a Tt and a tt plant?
An oxide of trivalent metal contains 32% of oxygen. Calculate the atomic mass of the metal.
The atomic mass of the metal.(M) = 51 g/mol
Further explanationGiven
32% of oxygen
Required
the atomic mass of the metal.
Solution
An oxide of trivalent metal : M₂O₃(Ar O = 16 g/mol)
The molar mass of metal oxide = 2M+16.3=2M+48
32% of oxygen, then :
32% x 2M+48 = 48
0.32(2M+48)=48
0.64M+15.36=48
0.64M=32.64
M=51
Acetylene gas, C2H2, is used as a fuel in welding torches. How many acetylene molecules are
in a cylinder that delivers 1400 L of acetylene at STP?
Answer:
375.8 × 10²³ molecules
Explanation:
Given data:
Number of molecules of acetylene = ?
Volume of cylinder = 1400 L
Temperature = standard = 273.15 K
Pressure = standard = 1 atm
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
PV = nRT
1 atm × 1400 L = n × 0.0821 atm.L/ mol.K × 273.15 K
1400 L.atm = n × 22.43 atm.L/ mol
n = 1400 L.atm / 22.43 atm.L/ mol
n = 62.4 mol
1 mole contain 6.022 × 10²³ molecules
62.4 mol × 6.022 × 10²³ molecules / 1 mol
375.8 × 10²³ molecules
How are plants and animals the
they different?
same? How are
Answer:
Plants and animals have different cell types, one is a autotroph and one is a heterotroph, plants can use photosynthesis and animals cannot.
Explanation:
35.0 grams of nitrogen gas reacts with 60.0 grams of hydrogen gas: N2 + 3H2--> 2NH3
a) Identify the limiting reagent:
b) Calculate the grams of ammonia formed:
c) Calculate the grams of excess reactant formed:
Explanation:
Moles of N2 = 35.0g / (28g/mol) = 1.25mol
Moles of H2 = 60.0g / (2g/mol) = 30.0mol
Since 1.25mol * 3 < 30.0mol, nitrogen is limiting.
Moles of NH3 = 1.25mol * 2 = 2.50mol.
Mass of NH3 = 2.50mol * (17g/mol) = 42.5g.
30.0mol - 1.25mol * 3 = 26.25mol.
Excess mass of H2
= 26.25mol * (2g/mol) = 52.5g.
CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + CO2 (g) + H20 (1)
In the chemical reaction above, what states are CaCO3 and
H2O in, respectively?
a) Aqueous, Solid
b) Gas, Liquid
c) Gas, Aqueous
d) Solid, Liquid
e) Solid, Aqueous
Answer:
solid and liquid state respectively
Answer:
A - solid, liquid
Explanation:
ur welcome
name some animals and plants that live on land?
please mark as brainliest
Answer:
cats, ants, spiders, elephants, porcupine, tiger, kangaroo, and ostrich. Mosses, hornworts, liverworts, lycophyte, seed plants, pteridophytes, and archaeopteridales.
Explanation:
Do the molecules of a liquid have (more, less, or the same) freedom of movement as the molecules of a gas? *
What is one of the functions of the nucleus?
A.
to remove waste products from a cell
B.
to contain the genetic information of an organism
C.
to determine what materials can enter or leave a cell
D.
to provide structural support for a plant cell
Answer:
B.
to contain the genetic information of an organism
Explanation:
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.
All can change the Earth slowly and gradually except
A. erosion
B. weathering
C. melting rock
D. earthquake
Answer:
D. Earthquake
Explanation:
I think earthquake because the question is asking for SLOW changes and an earthquake is kind of a sudden change...so yeah.
Hope this helps :D
During photosynthesis, plants take in carbon dioxide, water, and energy from the sun and produce carbohydrates and oxygen. Which of the following statements best explains how plants follow the law of conservation of mass during photosynthesis?
The amount of each element in the reactants equals the amount of each element in the products.
The number of carbon dioxide molecules taken in exactly equals the number of carbohydrate molecules produced.
The plant uses the carbon dioxide gas, liquid water, and energy to produce a solid carbohydrate.
The plants mass does not increase or decrease as a result of photosynthesis.
Answer:
The amount of each element in the reactants equals the amount of each element in the products.
For the well balanced equation of photosynthesis
4 What is the maximum number of students among whom 125 oranges, 150 citrus
and 225 guavaes can be equally divided? What is share of each fruit for a student?
Find it.
Answer:
25
Explanation:
fing the highest common factor
pime factorisation:
125=5×5×5
150=2×3×5×5
225=3×3×5×5
find the common numbers in all prime numbers
》5×5=25
When polymers are built, the process is called a dehydration reaction. Why is the word “dehydration” used?
Answer:
i really dont know
Explanation:
The balanced chemical equation below shows the combustion reaction of butane (C₄H₁₀). What is the mole ratio of butane (C₄H₁₀) to carbon dioxide (CO₂)? *
[tex]2C_{4}H_{10} + 13O_{2} --\ \textgreater \ 8CO_{2} + 10H_{2}O[/tex]
2:8
13:8
13:10
1:5
Which of the following is an element?
A.
magnesium chloride salt (MgCl)
B.
hydrochloric acid (HCl)
C.
carbon monoxide gas (CO)
D.
zinc metal (Zn)
Answer:
zinc metal (ZN) is an element
A change in the external or internal environment of an organism is known as
Answer:
A stimulus is a change in the internal or external environment. A receptor detects a stimulus.Can someone pleaseeee help if you’re correct I’ll give u brainlist
Answer:
I think it the second one adding external weight or the third one
Explanation:
I could never. im more like the last one
I'm really sorry if this was no help
Which formula can be used to calculate the molar mass of water (H2O)?
Answer:
One mole of H2O is made up of 2 moles of Hydrogen atoms and 1 mode of Oxygen atom. Mass of two moles of Hydrogen atoms = 2x1 g/mol. Mass of one mole of water = 2 g/mol + 16 g/mol = 18/ mol.
Explanation:
I majored in Chemistry