Answer:
B
Explanation:
Answer:
D. 3 mol/0.5 L
Explanation:
Just took the quiz
Select the conditions that are required for the formation of hurricanes. (Choose 3)
A: cold,cyclonic wind
B: deep ocean water
C: cold ocean water
D: warm,humid wind
E: warm ocean water
F: a strong cold front
Answer:
A: cold, cyclonic wind
B: deep ocean water
C: cold ocean water
E: warm ocean water
F: a strong cold front
You only need A, B, C, E, F not D because that for tornadoes buddy.
Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of
gases. One of the gases released is an oxide of nitrogen, X.
7.4g of anhydrous magnesium nitrate is heated until no further reaction takes place.
What mass of X is produced?
B 2.3g
C 3.05
D 4.6g
Mass of X produced : D. 4.6 g
Further explanationReaction
Decomposition of Magnesium nitrate into Magnesium oxide, Oxygen, and Nitrogen oxides
2 Mg(NO₃)₂ → 2 MgO + 4 NO₂ + O₂
mol Magnesium nitrate-Mg(NO₃)₂(MW=148,3 g/mol) :
[tex]\tt \dfrac{7.4}{148.3}=0.05[/tex]
mol ratio Mg(NO₃)₂ : NO₂ = 2 : 4, so mol NO₂ :
[tex]\tt \dfrac{4}{2}\times 0.05=0.1[/tex]
mass NO₂(MW=46 g/mol) :
[tex]\tt 0.1\times 46~g/mol=4.6~g[/tex]
.
How many moles are in 640.00 grams of Glucose (C6H1206)?
Express your answer rounded to 2 decimal places
Answer:
3.56 molesExplanation:
The number of moles of glucose can be found by using the formula
[tex]n = \frac{m}{M} \\ [/tex]
where
n is the number of moles
M is the molar mass
m is the mass of the substance
First we must find the molar mass of glucose
[tex]M(C) = 12 , \: \: \: M( H_2) = 1 \: \: , \: \: M(O_2) = 16 \\ [/tex]
The molar mass of glucose is
[tex]M(C_6H_{12}O_6) = (12 \times 6) + 12 + (16 \times 6) \\ = 72 + 12 + 96 \\ \\ = 180 \: \: g/mol \: \: \: [/tex]
mass = 640 g
So we have
[tex]n = \frac{640}{180} = \frac{64}{18} = \frac{32}{9} \\ = 3.5555..[/tex]
We have the final answer as
3.56 moles to 2 decimal placesHope this helps you
BRAINLIEST
What is kinetic energy? Give an example of kinetic energy.
energy which a body possess by virtue of being in motion
ex: a river flowing at a certain speed comprises kinetic energy as water has a certain velocity and mass
Help please its science
Answer: any answer choices
Explanation:
how is a solute and a solvent different
can someone help me please i’ll give brainly
Please help me how do i solve this
Answer:120
Explanation:2gfdxxfgngfnf
In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.Box 1 has more mass than Box 2. Box 1 and Box 2 are the same mass. Box 1 has less mass than Box 2
Answer:
There is no friction because of the mass.
Explanation:
The bigger box ran out of force to move so it hit the smaller box. (im in 7th grade and have the answer key)
Helpppppoop. Question 6 of 10
Which term best describes the state of matter modeled in the beaker?
A. Disorganized
B. Amorphous
C. Liquid
D. Solid
Answer:D. Solid
Explanation:
A. Disorganized
B. Amorphous
C. Liquid
D. Solid
Which of these is not true about weight
A:it is measurement of how heavy an object is
B:it is always the same mass,regardless of gravity
C:it is affected by objects mass and the force of gravity
D:it’s is commonly measured in pounds
Answer:
its b beacuse different things have different mass
What can cause a mutation when the cell copies its DNA?
All of the above
Exposure to chemicals
Exposure to radiation
Errors
Answer:
exposure to radiation i think
Explanation:
The mass of an object can vary with the object’s location true or false
Answer:
true
Explanation:
I just did it
suppose that you are comparing several objects. is it correct to say that the object with the largest volume has the largest mass? explain your reasoning, and include an example. help!! asap!!
Answer:
No
Explanation:
It is not correct to say that an object with the largest volume has the largest mass.
Mass and volume are not directly related. In fact, the relationship between them can be direct or inverse.
Mass is the amount of matter in a substance. Volume is the space a body occupies.
A balloon and a stone for example is a typical one. A balloon has more volume but far lesser mass compared to a stone. A stone, gravel sized has low volume but more massive than a balloon.Therefore, it is wrong to say a balloon has more mass because it has more volume.
6H2 represents how many atoms of hydrogen?
Answer:
i think its 12, but i'm not 100% sure
Explanation:
7. The percentage, by mass, of phosphorus in
calcium phosphate Ca3(PO4)2 is
(Ca=40, P=31, O=16)
(2 Points)
8%
10%
17%
20%
Answer:
I am pretty sure that the answer is 20%
Which statement is a testable hypothesis?
A. Beans are the best plants to use in a science fair experiment.
B. Watering bean plants with salt water will make them grow faster.
C. Bean plants will become extinct before corn plants do.
D. Everyone can grow beans given the right instructions.
please help. i’ll give brainliest if ur answer is correct
Answer:
b
Explanation:
I think B because its saying that perhaps watering with salt water would make them grow faster, you don't know yet unless tested.
Here is the electron configuration for Argon. What does the coefficient 3 in 3s2 tell us?
Ar: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
The coefficient 3 represents the electron shell
Further explanationIn an atom there are levels of energy in the shell and sub shell
This energy level is expressed in the form of electron configurations.
Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is
• s: 2 electrons
• p: 6 electrons
• d: 10 electrons and
• f: 14 electrons
Charging electrons in the sub shell uses the following sequence:
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.
Argon is a noble gas element with the symbol Ar with atomic number 18 and mass number 40
Electron configuration: [Ne] 3s²3p⁶
The coefficient 3 represents the electron shell, which is denoted as the quantum number n
This shell consists of 3 sub shells namely 3s, 3p and 3d which have a maximum of 18 electrons (3s = 2 electrons, 3p = 6 electrons and 3d = 10 electrons)
I will give brainiest how does a orange get its color
Answer:
by mixing red and yellow
Explanation:
Answer:
Either the sun or by mixing red and yellow together because they make orange.
Explanation:
Brainliest pls
PLEASE HELP
Wich two changes of state can be caused by removing thermal energy from a
substance.
A. Deposition
B.vaporization
C.sublimation
D.condensation
Answer:
Condensation
Explanation:
When thermal energy is added ti a substance the temperature rises, this causes solids to melt, liquid ti evaporate, or a solid to sublimate. when the pressure is applied to a substance, it can cause thus substance to condense.
1.) Fluorite has a glassy luster and a white streak. It's an inorganic solid with a chemical formula of CaF2 CaF2
A: It is inorganic
B: It is a solid
C. It can be defined by a chemical formula
D. All of the above
Answer:
D. All of the above
Fluorite is inorganic solid and can be defined by its chemical formula. Thus option D is correct.
What is chemical formula?Chemical formula is defined as a chemical elements numbers and symbols are used to provide information about the chemical quantities of atoms that make up a certain chemical compound or molecule.
It is also defined as any of numerous statements of a chemical compound's content or structure.
There are mainly three types of chemical formulas.
Empirical formulaMolecular formulaStructural formulaThus, fluorite is inorganic solid and can be defined by its chemical formula. Thus option D is correct.
To learn more about chemical formula, refer to the link below:
https://brainly.com/question/11995171
#SPJ5
PLEASE HELP MEEE!!!!!!!!!
Work completed : 15 J
Further explanationWork is the transfer of energy caused by the force acting on a moving object
Work is the product of force with the displacement of objects.
Can be formulated
W = F x d
W = Work, J, Nm
F = Force, N
d = distance, m
Force=F= 5 N
Distance=d=3 m
Work :
[tex]\tt W=5\times 3\\\\W=15~J[/tex]
BRAINLEST WILL BE GIVEN TO A RIGHT ANSWER!!!!
Potassium (K) has a charge of +1, and sulfur has a charge of –2. Which best describes the compound they make?
A) The chemical formula is K2S, and the name is potassium sulfide.
B) The chemical formula is KS2, and the name is potassium sulfide.
C) The chemical formula is K2S, and the name is sulfur potassium.
D) The chemical formula is KS2, and the name is sulfur potassium.
Answer:
A) The chemical formula is K2S, and the name is potassium sulfide. Explanation:
edge
Directions: Read through each scenario and identify the independent variable, dependent variable, and the control.
Question 1
1 pts
Rob is in charge of waxing the floor at the local mall. He wants to test a new brand of floor wax called
Squeaky Clean. Rob waxes 20 floor tiles with Squeaky Clean and 20 tiles with the original wax brand.
After one week he counts the number of scratches on the floor. What is the independent variable?
number of floor scratches
brand of floor wax
20 tiles with original brand wax
Answer:
The correct answer is - brand of floor wax.
Explanation:
The independent variable is the variable or the factor in an investigation which is manipulated or change in the experiment and affects the dependent variable and produces a various result.
In this investigation, there are different brands of the floor was are the independent variable as they are changed to see the effect on the scratches on the floor on 20 tiles for each brand.
During which change of state would the volume of a substance increase the most?
deposition
melting
vaporization
sublimation
Help me plz!
Answer:
Gas/vaporization
Explanation:
The most stare has the high volume is the gas state. So the answer is between vaporization and sublimation
Answer:
Submilation
Explanation:
Sodium hydroxide reacts with hydrochloric acid in a neutralization reaction. Will the temperature of the solution increase or decrease during this reaction?
Answer:
Increase.
Explanation:
All neutralization reactions are actually exothermic (meaning they exude heat).
Hope this helped!
mark all the things that can be chnaged about a chemical equation when it is being balanced
Answer:
a and b
Explanation:
The tundra is characterized by _____.
extremely cold temperatures
high rainfall
long growing seasons
high temperatures
Answer:
Tundra are cold bioms. They include poler bears wolfs rabbits etc
Explanation:
Which states of matter can form solutions?
A. Gas-liquid
B. Solid-solid
C. Solid-liquid
D. All of the above
Answer:
c
Explanation:
spongebob cheese pants
Answer:
I believe D
Explanation:
im not super sure but I'm pretttyyy sure
Air is trapped in a cylinder fitted with a piston that occupies 150.5 mL at 1.12 atm pressure. What is the new volume when the piston is depressed, increasing the pressure by 15%?
Answer:
New volume V2 = 120.4 ml
Explanation:
Given:
Pressure P1 = 1.12 atm
New pressure P2 = 1.12[1+0.25] = 1.4 atm
Old volume V1 = 150.5 ml
Find:
New volume V2
Computation:
P1V1 = P2V2
(1.12)(150.5) = (1.4)(V2)
V2 = 120.4 ml
New volume V2 = 120.4 ml