Answer:
the answer is C
Explanation:
it can form 3 bonds
What is the cost in dollars for the nails used to build a fence 80 meters long if it requires 30 nails per meter? There are 40 nails per box at a cost of 75 cents per box
Answer:
4500 cent
Explanation:
From the question, we were told that
a fence 80 meters long requires 30 nails per meter.
1 metre fence = 30 nails
Then 80 meters long= ( 30 × 80)
= 2400 nails
Which means a fence 80 meters long will require 2400 nails in total.
We need to find the cost in dollars for the nails to build a fence 80 meters long.
We know that 40 nails per box will cost 75 cents per box.
(2400 nails/40 nail per box)= 60 box
Then 60 box will be needed to complete the fence.
the cost in dollars for the nails to build a fence 80 meters long= (60 box × 75 cent per box)=4500 cent
What are the pros and cons of cloning a mammoth?
Answer:
List of Pros of Cloning
They could have a positive impact on the environment. ...
They would help us understand them better. ...
They can help us protect species that are close to extinction. ...
It makes us feel better for driving most of these species into extinction. ...
List of Cons of Cloning
We will be bringing back a species into an environment totally different from the one they lived in.
It puts the conservation of currently endangered species way back.
Which of these particles are lost in the oxidation process?
OA protons
OB.
neutrons
Ос. .
electrons
OD.
atoms
Answer: electrons
Explanation:
During oxidation and reduction, both of which are redox reactions, electrons are transferred.
Using the balanced chemical equation below. 2Al2O3 --> 4Al + 3O2 How many moles of oxygen are produced if 11.0 mol of Al are produced?
Answer:
8.25 moles of oxygen will be produced.
Explanation:
Given a balanced chemical equation;
2Al₂O₃ ------> 4Al + 3O₂
from the balanced chemical equation above, 3 moles of Oxygen are produced when 4 moles of Aluminum are produced.
4 moles of Al --------> 3 moles of Oxygen
11 moles of Al --------> ?
[tex]= \frac{(3 \ moles \ of \ O_2) \ \times \ (11 \ moles \ of \ Al)}{4 \ moles \ of \ Al} = 8.25 \ moles \ of \ O_2 \\\\[/tex]
Therefore, 8.25 moles of oxygen will be produced.
i dont get it, what am i supposed to do?
Answer:
It appears to be
replacementExplanation:
I did that question.
Scientists predict that the human population will continue to increase will likely happen as a result?
Answer: The prediction that human population is likely to increase may result in severe problems like global warming, extinction of animals due to human activities, et cetera.
Explanation:
The human population needs resources to survive, they use the resources in such a way that it is being exploited, the trees will be cut in such a large numbers that it will affect the animals depending them.
The human population also uses fossil fuels, burning of which releases harmful gases in the environment.
The usage of technology also comes with the curse of global warming because of release of green house gases such as chlorofluorocarbon.
With an increase in human population, there can be seen many harmful effects on environment.
Answer:
whatttttttttyu[poiuytrtyuiopoiuygtfdfghjkjhgfdfghjk
Explanation:
a) Find the gas speed of sulfur dioxide at 100.0 degrees Celsius? ______________
b) What is the rate of effusion of sulfur dioxide compared to nitrogen triodide at the same temperature? __________________
a. 381.27 m/s
b. the rate of effusion of sulfur dioxide = 2.5 faster than nitrogen triiodide
Further explanationGiven
T = 100 + 273 = 373 K
Required
a. the gas speedi
b. The rate of effusion comparison
Solution
a.
Average velocities of gases can be expressed as root-mean-square averages. (V rms)
[tex]\large {\boxed {\bold {v_ {rms} = \sqrt {\dfrac {3RT} {Mm}}}}[/tex]
R = gas constant, T = temperature, Mm = molar mass of the gas particles
From the question
R = 8,314 J / mol K
T = temperature
Mm = molar mass, kg / mol
Molar mass of Sulfur dioxide = 64 g/mol = 0.064 kg/mol
[tex]\tt v=\sqrt{\dfrac{3\times 8.314\times 373}{0.064} }\\\\v=381.27~m/s[/tex]
b. the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
M₁ = molar mass sulfur dioxide = 64
M₂ = molar mass nitrogen triodide = 395
[tex]\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{395}{64} }=\dfrac{20}{8}=2.5[/tex]
the rate of effusion of sulfur dioxide = 2.5 faster than nitrogen triodide
What are the horizontal rows on the periodic table numbered 1-7 called?
Answer: They're called Periods
periods of the periodic table
Kelly needs a new car. She decides to buy the first one she sees. This is an example of making a decision by:
A
resistance
B
impulse
C
planning
D
default
help please
Answer:
B. Impulse
Explanation:
A= she is not resisting buying the car
B= She bought the car right away(impulse)
C = She did not plan ahead on what car she would buy
D= Not reasonable
The current model of the atom suggests that ?
Answer:
i dont see the model bro
Explanation:
Answer:
The current model of the atom shows an atom that is mostly empty space. In the center is a small nucleus made of protons and neutrons.
Explanation:
plzzz help me out as I was not in class and I missed the lesson
Answer:
Well why didn't you do it? Have a great day and I am so sorry for wasting your points I don't need them. I hope someone helps!! ;)
Explanation:
About 97.5% of Earth’s water is
Answer: Water
Explanation:
Gaseous ethane, C2H6, burns in the presence of oxygen
gas according to the balanced equation below.
2 C2H6 (g) + 7 O2 (g) —+ 4CO2 (g) + 6 H20 (g)
How many moles of carbon dioxide can be produced from
1.00 mol of ethane?
04.00 mol CO2
0 0.50 mol CO2
01.00 mol CO2
2.00 mol CO2
Moles of Carbon dioxide(CO2) = 2
Further explanationGiven
Reaction
2 C2H6 (g) + 7 O2 (g) —+ 4CO2 (g) + 6 H20 (g)
Required
moles of carbon dioxide
Solution
The reaction coefficient shows the mole ratio of the compounds in the reaction equation (reactants and products)
From the equation, mol ratio of C2H6 : CO2 = 2 : 4, so mol CO2 :
mol CO2 = (4/2) x mol C2H6
mol CO2 = 2 x 1
mol CO2 = 2
Li(OH) --> Li2O + H20
Answer:
2Li(OH)-->Li2O+H20
Explanation:
There are 2Li, 2H and 2O on each side
oles
A bottle of H3PO4 contains 30.00 g, how many moles are in this container?
Moles in the container : 0.306
Further explanationGiven
30 g of H3PO4
Required
moles in container
Solution
A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12
1 mole = 6.02.10²³ particles
While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule
MW of H3PO4 = 3.1 + 31 + 4.16 = 98 g/mol
mol = mass : MW
mol = 30 : 98
mol = 0.306
Metallic bonds are:
A. bonds holding together atoms with very different
electronegativities.
B. bonds holding together a metal and a nonmetal.
C. bonds holding together two atoms of different kinds of metal.
D. bonds holding together two atoms of the same kind of metal.
Answer:
D. bonds holding together two atoms of the same kind of metal.
Explanation:
Metallic bonds are very special kinds of interatomic forces that holds metals together and confers such unique properties on them.
The formation of this bond type is favored by large atomic radius, low ionization energy and a large number of electrons in the valence shell.
The metallic bond is usually an attraction between the positive nuclei of all the closely packed atoms in the lattice and electron cloud jointly formed by all the atoms by losing their outermost shell electrons. This is as a result of low ionization energy.When
or more objects come in contact with eachother this is called
contact force.
two
Explanation:
When two or more objects come in contact with each other this is called contact force
On a distance-time graph, the slope of the line indicates the ________ of the object
Answer:
Speed
Explanation:
On a distance - time graph, the slope of the line indicates the speed of the object.
Speed is the rate of change of distance with time.
Speed = [tex]\frac{distance}{time}[/tex]
Now, the slope is the change in distance with the change time which is commensurate with the speed equation.
For a displacement - time graph, the slope is the velocity.
Therefore the slope of a distance - time graph is its speed.
what should the government do to preserve our culture and heritage?
please mark as brainliest
A sample of a compound containing only carbon and hydrogen was burned to produce 1.36g of water and 5.22g of carbon dioxide. Calculate the empirical formula of the compound?
Answer:
[tex]C_4H_5[/tex]
Explanation:
Hello!
In this case, since the combustion analysis provides us the yielded mass of both water and carbon dioxide, as the sources of hydrogen and carbon in the hydrocarbon, we are able to compute the moles of each via the following mole-mass relationships:
[tex]n_H=1.36gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O}=0.151molH\\\\n_C=5.22gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.119molC[/tex]
Now, we divide those moles by the fewest ones (those of carbon) in order to compute their subscripts in the empirical formula:
[tex]C: \frac{0.119}{0.119} = 1 \\\\H:\frac{0.151}{0.119} = 1.27[/tex]
However we need whole numbers, that is why we multiply each subscript by 4 to get 4 for carbon and 5.08 ≅ 5 for hydrogen:
[tex]C_4H_5[/tex]
Best regards!
Students are discussing the pros and cons of petroleum as a naturals resource. Which of the following do you agree with?
Answer:
this is a multiple choice question where are the answers
Explanation:
What is the number of electronsin hydrogen
Answer:
There's only one electron in hydrogen.
Answer:
Hydrogen contain 1 electron
Explanation:
PLEASE HELP I REALLY CANT FAIL THIS. THIS DETERMINS IF I PASS MY GRADE. What are the most basic building blocks of all organisms?
OA.
blood
ОВ.
tissue
OC.
cells
OD
organs
Answer:
Cells are the basic building blocks of living things.
Explanation:
So the answer is cells because it is composed of trillions of cells, all with their own specialised function. Cells are the basic structures of all living organisms.
I hope this helps you pass and humble yourself you will get to it, you got this!!!
Answer:
Cells are the most basic building blocks
Explanation:
Tissues are made out of cells. Organs are made out of tissues.
Which transfer of heat is depicted in the figure?
Answer:
Oh it is convention
Explanation:
because the heat transfer is through fluids
What was the same about the atoms of the eggium
Select the answer that lists the radiation waves in order of increasing
energy
Gamma rays, Infrared, Radio waves
O Radio waves, X-rays, Ultraviolet
O
Visible light, Infrared, X-rays
O Microwaves, Ultraviolet, X rays
Answer:
Concept: Radiology & Chemistry
Energy waves are judged based on their wave length, which is measures from one "hump" to the next In order from least to greatest, aka increasing: Radio Waves, infrared waves, visible light, UV, x-Ray, and GammaGive brainlist and rate positivelyhow many atoms are in 45.22 moles of strontium
Answer:
272.31× 10²³ atom of strontium
Explanation:
Given data:
Number of moles of strontium = 45.22 mol
Number of atoms = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
45.22 mol × 6.022 × 10²³ atom / 1 mol
272.31× 10²³ atom
This is the smallest particle in a compound. It is made up of 2 or more atoms.
PLEASE HELPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE LOL
PLEASE WRITE IN YOUR OWN WORDS
1. After your body breaks food down, what are three things that can happen to the atoms from your food? *
2. Would you be able to get energy from food if there weren’t chemical reactions in your body? Why or why not? *
Answer:
1 Once proteins, fats and carbohydrates are digested, absorption takes place in the small intestine.
2 if we eat food we get energy, but if there weren't chemical reaction in your body nothing happens.
Explanation:
1 Most of the digestion occurs in the first part of the small intestine while the absorption of broken down nutrients, water, vitamins, and minerals occurs in the rest of it.
What are genes that have been changed called?