Answers
Answer:
45 degrees
Explanation:
as you can see, the box in the corner states that both the angles together are 90 degrees, and half of that is 45. 90/2=45
Related Questions
The relative formula mass (M) of a Group 2 metal carbonate is 197
Relative atomic masses (Ar): C = 12
O = 16
Calculate the relative atomic mass (Ar) of the Group 2 metal in the metal carbonate
Name the Group 2 metal.
Answers
The relative atomic mass (Ar) : 137 and the element : Ba
Further explanationThe naming of chemical compounds is giving a special name to a compound that aims to facilitate the classification of compounds and facilitate the identification of a compound. The rules for naming chemical compounds have been determined by the IUPAC (International Union of Pure and Applied Chemistry)
This nomenclature includes the naming of ion compounds, covalent compounds, and polyatomic
The molar mass of a compound is given by the sum of the relative atomic mass of Ar
M AxBy = (x.Ar A + y. Ar B)
Group 2 metals have a +2 charge : M²⁺
So the compound of metal carbonate : MCO₃
Ar C = 12, O = 16
M MCO₃ = (1.Ar M + 1. Ar C+ 3. Ar O)
[tex]\tt 197=1. Ar~M+1.12+3.16\\\\197=Ar~M+12+48\\\\Ar~M=137[/tex]
The element with relative atomic masses 137 is Ba
So the compound : BaCO₃
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Answers
BE FIRST TO ANSWER FOR SUM GOOD!!!!!:D
Answers
please anyone help me with this
Answers
Answer:
matter is anything that takes up space while elements are subtanxes that can be broken down
If Maria winks exactly 5 times every minute while she is awake and she sleeps exactly 8 hours a day, how many times does Maria wink in a day? winks/day.
Answers
Answer:4,800
Explanation:
5 winks a minute, 60 minutes in an hour.
300 winks an hour, 16 hours a day.
4,800.
Answer:
The answer is 4,800 winks per day.
Explanation: There are 24 hours in a day, 24 minus the 8 hours shes asleep is 16. There are 60 minutes in an hour. 5 x 60 is 300. 300 winks an hour multiplied by the 16 hours she's awake is 4,800.
Is acid a chemical weather
Yes or no
Is carbon dioxide a chemical weather
Yes or no
Is water a chemical weather
Yes or no
Is oxygen a chemical weather
Yes or no
Answers
carbon dioxide, yes
water, yes
oxygen, yes
Answer:NO
Explanation:NO
The atomic mass of an atom is calculated by adding up what two subatomic particles
Answers
The atomic mass of an atom is calculated by adding up protons and neutrons
Further explanationThere are two components that accompany an element, the mass number and atomic number
Atoms are composed of 3 types of basic particles (subatomic particles): protons, electrons, and neutrons
The charge of 1 proton is equal to a charge of 1 electron but has a different sign
The proton is positively charged (+1), the electron is negatively charged (-1). and neutrons not charged (neutral)
The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.
Atomic number = number of protons = number of electrons ⇒ neutral number
Atomic mass is the sum of protons and neutrons
Atomic Number (Z) = Atomic mass (A) - Number of Neutrons
True or False?
Solubility and melting point are two examples of physical properties.
Answers
Answer: True
Explanation:
Solubility is a physical property. The reason is because it can be determined by simple observation and does not change the chemical composition of the material. If the material is soluble, the solubility is the maximum amount of material that dissolves in a solvent at a given temperature.
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.
Answer: True
Explanation: These are both examples of physical properties
what is the mass of 4.900 x 10^25 atoms of He
Answers
what is the term for photosynthesis
Answers
can anybody help me? ill mark brainliest!!! please ITS TIMED
Answers
Density = Mass/Volume but it can also be rearranged to:
Mass = Volume x Density
Given in the question:
Volume - 44.9 cc
Density - 19.3 g/cc
Calculation
Mass = Volume x Density
= 44.9 x 19.3
= 866.57 g
How does an increase in the annual melt season in Antarctica have a global effect?
a.
It causes an increase in heat related illness and death.
b.
It causes the global concentration of carbon dioxide to decrease.
c.
The water in the melting glaciers can cause sea levels to rise.
d.
None of the above is true.
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
The correct answer is option "C"
The water in the melting glaciers can cause sea levels to rise.
The increase in annual melt season indicates a prolonged melting (hot) season which is primarily due to the impact of global warming. Global warming is increasing the highest temperature mark in the hot seasons on the planet which is adversely affecting the polar regions of earth. The ice in these Polar Regions has started melting. This ice when converted into liquid form flows through regions to reach sea and oceans and thus causes the rising of sea level
The annual melt season in Antarctica produces a global effect because the water in the melting glaciers can cause sea levels to rise.
What is the annual melt season?The annual melt season refers to a period of time when the ice in cold and polar regions of the world begin to melt to form warm.
The melting of ice in these regions such as Antarctica results in a rise in the global sea levels.
Therefore, the annual melt season in Antarctica produces a global effect because the water in the melting glaciers can cause sea levels to rise.
Learn more melt season at: https://brainly.com/question/1476419
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HELP ASAP
Which of the following is NOT a factor in conduction?
A. Temperature difference
B. Fluid flow
C. Surface Contact
D. Cross sectional area
Answers
B:Fluid Flow because fluid flow is how convection heat is transfered
please help!! my grades dying
15 points
Answers
Answers-in-bold:
There are two common temperature scales. On the Fahrenheit scale, water freezes at 32 degrees. The Celsius scale divides the interval between the freezing and boiling points of water into 100 degrees.
QUESTION 2: How is velocity different from speed? *
1 point
Velocity is when an object goes in reverse
Velocity is the direction an object moves in, and it has nothing to do with speed
Velocity is speed and direction together
Answers
Answer:
Speed is the rate at which an object covers distance.
Velocity is the speed of something in a given direction.
what are Atoms?
what do they do?
Answers
Answer:
atoms are small particles that make up everything even living things and non living things
Explanation:
hello~i will really appreciate it if you answer all this♡
☆
1.How many valence electrons do noble gases like Ne,Ar and Kr have?
a.1.
b.2
c.6
d.7
2.The following describe ionic bonding,EXCEPT____.
a.It involves the transfer of electrons.
b.It involves sharing of electrons.
c.atoms either gain or lose electrons.
d.It is a bond between a metal and a non-metal.
3.Which of the following pairs of atoms is most likely to form a covalent compound?
a.C,O
b.Na,O
c.Mg,Br
d.Ba,CI
4.Which of the following is a metal?
a.O
b.S
c.K
d.C
5.Which is not a type of a chemical bonding?
a. Polar bonding
b.Metallic bonding
c.ionic bonding
d.covalent
||. A. Use Lewis structures to show . the transfer of electrons in the given combinations.
1.K +Br
2.Ba + I
3.Be + O
4.Na + S
5.AI + F
B.What ionic charge will the following elements have?PLEASE JUSTIFY YOUR ANSWER.
1. Group 2A
2. Group 5A
3.Group 6A
C.Predict whether the bonding in the oxides of the following elements is covalent or ionic.EXPLAIN YOUR ANSWER.
1.Aluminum
2.Magnesium
3.Phosphorus
4.silicon
5.sodium
|||. Write the electron configuration of the following elements.
1. Ti
2. V
3. Se
4. Ag
5. Zr
thank you!
to your hardwork★
Answers
Explanation:
1)Noble gases have stable valence electron of 2 and 8.
2)B- ionic compounds do not require sharing of electron.
3)B- sodium and oxygen will likely form a covalent compound.
4) C- potassium
5) A- polar bonding
6)
what's the difference between series and parallel circuit in table form?
Answers
In a parallel circuit, a different amount of current flows through each parallel branch of the circuit.
In the series circuit, different voltage exists across each component in the circuit.
Whereas in the parallel circuit, the same voltage exists across the multiple components in the circuit.
Hope this helps :)
3-4 sentences if you give me 3-4 ill like if you give me 5 ill give 5 star if you give me 6 ill do all and branliest pls help. Why is the study of human movement important?
Answers
Human Movement is important because it most commonly used to insure optimal athletic ability. It can also be used to identify the cause of most common sports injuries and movement-related problems. The name for this type of study is called Kinesiology. This is a very necessary part of students understanding dance, sports, and physical well-being. Studying Kinesiology results in better physical performance, as well as many cardiovascular improvements. Kinesiology is used to answer many still unknown question about human movement.
Express the measurement using the appropriate SI prefix. For example, 10.72 x 103m is the same as 10.72 km because the “k” stands for 103
8.09 x 10-6g
(I got super stuck on this)
Answers
Answer:
[tex]10.72 \times 10 {}^{3} m = 10.72km \\ 8.09 \times 10 {}^{ - 6} g = 8.09 \times 10 {}^{ - 9} kg \\ \\ note : \\ to \: convert \: to \: \: k(units) \: you \: divide \: the \: value \: by \: {10}^{3} . \\ 5m \: to \: km \: will \: be : \\ \frac{5}{1000} km = {5 \times 10}^{ - 3} km[/tex]
PLEASE HELP!!!!
The student is chemically combining 4 g of hydrogen with 2 g of
oxygen. The reactants have a coefficient of 2 in them. What will be the
mass of the product?
A. 12 grams
B. 10 grams
C. 8 grams
D. 6 grams
Answers
Answer: Buy ram 3500 Laramie Longhorn
Explanation:
Answer:
12
Explanation:
A 10-kg ball is accelerated 500 m / s2 by a force of
Answers
Answer:
The answer is 5000 NExplanation:
The force acting on a body can be found by using the formula
force = mass × accelerationFrom the question
mass = 10 kg
acceleration = 500 m/s²
We have
force = 10 × 500
We have the final answer as
5000 NHope this helps you
Which energy transformations occur when a candle burns?
Thermal energy transforms into mechanical energy and radiant energy.
Chemical energy transforms into thermal energy and electrical energy.
Thermal energy transforms into radiant energy and chemical energy
Chemical energy transforms into thermal energy and radiant energy.
Answers
Answer:
D - Chemical energy transforms into thermal energy and radiant energy
Explanation:
Correct on edge 2020
Answer:
(D)
Explanation:
Chemical energy transforms into thermal energy and radiant energy.
What is the mass of 15 ml of aluminum if the density is 2.70 g/ml?
Answers
Answer:
40.5g
Explanation:
desnity = mass/volume
2.7 = mass/15
mass = 2.7 x 15
mass = 40.5 g
What are the two main types of cells, and how do we classify them?
Answers
Answer:
eukaryotic, which contain a nucleus, and prokaryotic, which do not. Prokaryotes are single-celled organisms, while eukaryotes can be either single-celled or multicellular.
Explanation:
Answer:
Eukaryotic and prokaryotic
Explanation:
Eukaryotic cells contain a nucleus and prokaryotic cells do not
Help plsss!
If the average atomic mass is 39.948amu, which isotope is more abundant?
Answers
Answer:
It depends on which element you are talking about. I appears that no element has an average atomic mass of that number. So, for the question, if it assumes that there are two isomers with 39 amu and 40 amu, then the 40 amu one would be more abundant. But again, there are different possible isotopes and I can't tell what the question wants.
After a particularly fierce blow, he crawled to his feet, too dazed to rush. . . . All the pain he had endured was as nothing compared with the exquisite agony of this. With a roar that was almost lionlike in its ferocity, he again hurled himself at the man. But the man, shifting the club from right to left, coolly caught him by the under jaw, at the same time wrenching downward and backward. Buck described a complete circle in the air, and half of another, then crashed to the ground on his head and chest.
What is the man’s role in this excerpt?
The man is the protagonist because he is the main character.
The man is the protagonist because he proves his superior strength.
The man is the antagonist because he reveals his cruel nature.
The man is the antagonist because he is opposing Buck.
Answers
Answer:
D. The man is the antagonist because he is opposing Buck.
Explanation:
I just took the quiz.
Which option is an element?
a. oxygen
b. sodium chloride
c. air
d. water
Answers
Answer:
Explanation:
water
Answer:
oxygen
Explanation:
Which characteristic of a substance is considered a chemical property?
its boiling point
its reactivity
its density
its conductivity
Answers
Answer:
Reactivity
Explanation:
a chemical reacting to another chemical is considered a Chemical property because chemicals react with other chemicals differently. Pls PLs give me brainliest
Answer:
reactivity
Explanation:
What subatomic particle identifies any type of
atom?
Answers
Answer:
hope it helps..
Explanation:
Number of protons
More information: The atomic number is used to identify an element, and the atomic number is the number of protons in the nuclei of an element. Every element has its own unique number of protons, and therefore, atomic number.