Answer:
0.807 moles
Explanation:
No of molecules = No of mole × Avogadro's number
No of mole = No of molecules / Avogadro's number
No of mole = 5.24×10^23/6.02×10^23
0.870 moles
PLS HELPP!!!
i’ll mark brainliest + 15 points!!
If 2.5 grams of calcium bromide reacted with excess lithium oxide, how many grams of bromide product would be formed?
parts of Earth and its atmosphere where there is life
Answer:
stratosphere
Explanation:
The stratosphere is crucial to life on Earth because it contains small amounts of ozone, a form of oxygen that prevents harmful UV rays from reaching Earth.
What type of
energy travels in the form of electromagnetic waves?
A: Chemical Energy
B: Gravitational Energy
C: Nuclear Energy
D: Radiant Energy
Answer:
Radiant Energy
Explanation:
Radiant energy is created through electromagnetic waves
Brooke decides to model a lunar eclipse. She attaches a large poster of the Sun to her wall to represent the Sun. She then decides that her head will represent Earth, and the direction she is facing will indicate the direction an observer on Earth is facing. She will then hold a small ball in her hand to represent the Moon. In order to model a person watching a lunar eclipse, Brooke faces the "Sun," stretches out her hand, and faces the "Moon" in front of her. What aspect of Brooke's model should be corrected?
A. Brooke should turn so that the Sun is on her right, and hold the Moon to her left.
B. Brooke should turn so that her back is to the Sun, and hold the Moon behind her.
C. Brooke should turn so that the Sun is on her left, and hold the Moon in front of her.
D. Brooke should turn so that her back is to the Sun, and hold the Moon in front of her.
PLEASE HELP ITS A TEST :(((
Answer:
its D
Explanation:
Brooke should turn so that her back is to the Sun to her wall, and hold the Moon (ball representing Moon) in front of her. Therefore, option (D) is correct.
What is a Lunar eclipse?The eclipse of the moon occurs when the earth comes in between the sun and the moon. The earth blocks the light coming from the sun from reaching the surface of the moon and casts its shadow on the moon.
A lunar eclipse occurs on a full moon day and can be observed up to 3 lunar eclipses per year. A lunar eclipse can be categorized depending on how the sun, the moon, and the earth line up.
A partial lunar eclipse is when only a part of the moon moves into the shadow's earth. A total lunar eclipse is when the earth crossed directly in front of the moon and casts its shadow.
If Brooke's head is earth then it will be in the center and her back will be towards to sun poster on the wall. So that the ball in her hand can play as a moon to show the lunar eclipse.
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electron configuration for Li
Answer:
the electronic configuration of Li is
=》 2, 1
and in spdf configuration it's 1s^2 2s^1
Answer: [He] 2s1
Explanation:
Electrons per shell: 2,1
Atomic number: 3
Electronegativity: 0.98
Atomic mass: 6.941 u
Discoverer: Johan August Arfwedson
Period: Period 2 element
1. How many molecules of H,O are in 4.32 moles?
Answer:
dont know
Explanation:
For many plants, carbon dioxide is a limiting factor.
What happens when more carbon dioxide is available to plants?
1.Plant growth increases.
2.Plant growth stays the same.
3.Plant growth decreases.
4.Plant growth may increase or decrease.
Answer:
1
Explanation:
plants use carbon dioxide and if there is more then that mean the plants will have more to use and will grow faster and populate more
How many molecules of nitrogen dioxide NO2 are in 1 mole of NO2?
Answer:
The answer is 46.0055. We assume you are converting between grams NO2 and mole. You can view more details on each measurement unit: molecular weight of NO2 or mol This compound is also known as Nitrogen Dioxide.
Explanation:
hope this helps
What is true about a chemical reaction
Answer: energy is transferred, but it can go to the products or the reactants.
Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.
What can be concluded from the statements above?
A. A harmful compound can become harmless when its elements are separated.
B. A harmless compound can become harmful when its elements are separated.
C. Breaking a compound into its separate elements has no noticeable effects.
D.Breaking a compound into its separate elements can create carbon dioxide.
Answer:
B
Explanation:
I am not sure why
Answer:
Yea I think B as well!!!!!
Analyze. This reaction releases energy as heat. Explain whether the reaction is exothermic or endothermic and whether it obeys the laws of Conservation or energy
Answer:
See explanation
Explanation:
If heat is given out in a reaction, then that reaction is exothermic. If heat is absorbed in a reaction, then that reaction is endothermic.
Hence, if heat is given out, the reaction is exothermic. The heat given out does work on the surrounding thus the laws of conservation of energy are obeyed.
Answer:
The reaction is exothermic.
Explanation:
I took the test
The best description of the Big Bang Theory is ______________
A. The universe began with cold dense energy compressing into matter after which all matter and energy began rapidly contracting toward each other.
B. The universe began with hot dense energy compressing into matter after which all matter and energy began rapidly expanding away from each other.
C. The universe began with hot dense matter after which all energy began rapidly expanding away from each other.
D. The universe began with cold, spread out matter compressing into energy, after which all matter and energy began slowly moving toward each other
Answer:
B. the universe began with hot dense energy compressing into matter after which all matter and energy began to rapidly expanding away from each other.
hope it helps
What is the answer to question 7, NH4C2H3O2
Answer:
Ammonium acetate was not sure at first but it was Ammonium acetate sorry i was confused at first
Hope this helps :D
What is an ion? What are the different properties of an ion? There is more than one answer choose all that apply
Answer:
An ion is an atom or molecule that has a different number of electrons than protons, so it has a charge.
Explanation:
Trust me please
Which kind of worm has a closed circulatory system?
a planarian
a fluke
a pinworm
an earthworm
An earthworm has a closed circulatory system.
The earthworm has a closed circulatory system. An earthworm circulates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm.
As important as they are alive for distributing nutrients and organisms and decomposing matter, worms are also very important in the food chain. They provide a crucial protein-rich source of food for other important species like birds, hedgehogs and frogs.
They may live up to eight years, though one to two is more likely. Full size for an earthworm varies among species, ranging from less than half an inch long to nearly 10 feet.
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what is the temperature in the fahrenheit?
How is a carbon atom different from a hydrogen atom?
Answer:
Carbon atom is a chemical element with the symbol C and atomic number 6 ( electrons). While Hydrogen atom is an atom of the chemical element hydrogen that have only 1 electron.
Explanation:
The carbon atom different from a hydrogen atom, because the atomic number of hydrogen is 1 . The atomic mass number of hydrogen is also one. For the carbon atom, the atomic number is 6, and the atomic mass number of carbon is 12.
What is an atomic number ?The term atomic number is defined as the number of a chemical element in the periodic system. The elements are arranged in order of increasing number of protons in the nucleus.
The atomic number is situated at the upper left, or number of protons. In the middle is the letter symbol for the element. Atomic number is equal to the proton number or the number of protons found in the nucleus of every atom of that element.
Thus, Carbon atom is a chemical element with the symbol C and atomic number 6. Whereas hydrogen atom is an atom of the chemical element hydrogen that have only 1 electron and its symbol is H.
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teachers instructions - “ clear my examples and replace with your own words “ you get brainliest if I get good grade :)
Answer:
can you give me more clearence on what is going on
Explanation:
PLEASE HELP! SEE ATTACHED!
Answer:
Ans => C => 43.3%
Explanation:
2CO + O₂ => 2CO₂
Given 1g CO = 1g/28g·mol⁻¹ = 0.036 mol CO
b/c coefficient of CO = coefficient of CO₂ => moles CO₂ = 0.036 mol = 0.036mol x 44g/mol = 1.57 gCO₂ (theoretical yield)
%Yield = (actual yield/theoretical yield) x 100% = (0.68g/1.57g) x 100% = 43.3%
What kind of mixture is a solution? Name the different constituents of a solution
Answer:
homogeneous mixture
Explanation:
two or more substances
a component that dissolves and a solvent
Could someone pls help me if you know it!!
Answer:
Beautiftul, begging under F
honest, beginning in thrid line under A
hopeful, fifth line under F
Explanation:
. A skydiver jumps from an airplane and opens his parachute. At some point during his fall, the downward force of gravity on the skydiver is equal to the upward force of drag on the parachute. Which of the following best describes the skydiver's motion at this point? The skydiver is gaining speed downward. The skydiver is moving at a constant speed. The skydiver is decreasing in speed.
The upward drag and downward force is equal for the skydiver when he jumps down from the plane. Thus, he experiences a constant speed through out his motion.
What is gravitational force?Gravitational force is a kind of force by which a body attracts other objects into its center of mass. Force exerted by the body depends on the mass and distance to it.
Earth pull every objects into its surface by gravitational fore of attraction. For moving body the the gravitational force acting downward have an acceleration due to gravity.
The skydiver experiences a force upward by the drag of a the parachute. When this force becomes equal to the downward fore of gravity, then his speed will be constant thus, no gain or lose for speed.
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hi...need help....thank you..
Answer:
36 oxygen atoms
Explanation:
From the question given above, the following data were obtained:
Compound => 4Al₂(CO₃)₃
Number of Oxygen atom in the compound =?
The number of oxygen atom in the above compound can be obtained as follow:
4Al₂(CO₃)₃
Al = 4 × 2 = 8 atoms
C = 4 × 3 × 1 = 12 atoms
O = 4 × 3 × 3 = 36 atoms
From the simple illustration made above, there are 36 oxygen atoms in the compound.
I need the answer for number 17 pls
i just need help grouping them
Answer:
Potassium: 1 Stratum: 2 Sodium: 1 Copper: 11 Calcium: 2 Lithium:1
Explanation:
The groups are columns on the periodic table
Carlita’s body is made up of many cells. What is one thing all her cells have in common?
Answer:
All of them have a nucleus..
Explanation:
Pretty simple stuff. There's no cell without one.
Carlita’s body is made up of many cells. The one thing that all her cells have in common is they have the same kind of genes.
What are genes?Genes are tiny pieces of spherical hereditary material that are bead-shaped and found on chromosomes. They hold the organism's genetic makeup. The number of genes on each chromosome is incalculable.
The hereditary material that makes up chromosomes is arranged in x shapes inside the nucleus. DNA, genes, and proteins make it up. An organism's genotype is distinct from other organisms because of its distinct genetic makeup, and this distinction can be passed down from one generation to the next.
Traits may be influenced by genes, the environment, or a mixture of the two. Quantitative features can also be qualitative, such as eye colour (such as height or blood pressure).
Therefore, numerous cells make up Carlita's body. Her cells all share the same type of genes, which is the only thing that unites them.
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Use the equation weight=mg to find the weight of a 45 kg child
Answer:
well the answer is 99.2lbs I know that
can someone pls help me im tryna get this done tysm brailiest for free
Answer:
geothite
Explanation:
i did a test on this a few months ago
Answer:
sphalerite i think
Explanation:
What is the mass of a 270 cm3 sample of a metal with density of 3.66 g/cm3?
Answer:
988.2 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 3.66 × 270
We have the final answer as
988.2 gHope this helps you
All of the following rivers are labeled on the map above except the __________ River.
A. Danube
B. Volga
C. Lena
D. Ob
