Answer:
24.58 m/s
Explanation:
Given that,
Speed of an object = 55 mph
We need to find the equivalent unit in m/s
We know that,
1 mile = 1609 m
1 hour = 3600 s
So,
[tex]55\ mph=\dfrac{55\times 1609\ m}{3600\ s}\\\\=24.58\ m/s[/tex]
So, the required speed is 24.58 m/s.
Was Dalton's Atomic Theory correct or incorrect and why?
Answer:
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions. ... According to Dalton, atoms of different elements combine in simple whole number ratios to form compounds.
when an ecosystem changes the results are (positive negative both or none) explain
This is science!
Answer:
C. Both
Explanation:
When an Ecosystem changes the effects can be both positive and negative. It all really just depends on what the change is.
I KNOW THE ANS JUST NEED AN EXPLANATION...PLEASE I WILL Mark you the brainiest
Q1; ___________ have almost half a set of electrons in the outer most energy level.
1- metalloids
2- metals
3- nonmetals
Q2;________ are known to be gasses at room temperature.
1- nonmetals
2- metalloids
3- metals
Answer:
2 metalliods....
1 metals
Some items, such as rubber, float on the water, while some items, such as gold, sink in
the water. If an item floats is it more or less dense than the water?
Answer:
If an item is less dense, it floats on the water.
Explanation:
We know this since the more dense something it usually is heavier than if it was less dense. Which ways it down resulting to it sinking.
Which of the following interactions would be the weakest?
Picture provided, 10 points. Please only answer correctly.
Answer:
D.) Li+ and C4H10
i hope it helped.
What is the chemical formula for sodium sulfate
Answer:
Na2So4
Explanation:
Na is group 1, so has a charge of 1+
Sulphate’s formula is SO4 2-,
because sulphate has double the charge of Na, you need two Na’s to make it equal.
Therefore it’s Na2SO4
The liquid inside the cell is called
Answer:
The cytoplasm
Explanation:
Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules. Some intracellular organelles, such the nucleus and mitochondria, are enclosed by membranes that separate them from the cytoplasm.
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hope this helps:)
Trees, birds, and bacteria are all similar because they are all formed from
Answer:
Cells or atoms
Explanation:
Answer:
are made of one or more cells.
need energy to stay alive.
respond to stimuli in their environment.
grow and reproduce.
maintain a stable internal environment.
Explanation:
Plz brainliest
What are two sources of phosphorous?
A. stratosphere
B. Erosion
C. Cows
D. Fossil fuels
E. Fertilizer
Answer:
A. stratosphere
E. Fertilizer
Explanation:
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
643.21g
1mol
10423
262.82g
6. How many grams are in 5139 x10425
molecules of AlOH)3
1
4.061x10^24
1 mol
Answer: Calculate the molar mass of Mg3(PO4)2 in grams per mole or search for a chemical formula or substance.
Missing: 643.21 Must include: 643.21. A balloon is filled with 36.2 liters of Cl2 gas at STP. How many moles of chlorine gas are inside? Solution: 36.2
Missing: 4.061 Must include: 4.061 .For H2O, there is one atom of oxygen and two atoms of hydrogen. A molecule can be made of only one type of atom. In its stable molecular form, oxygen exists as two atoms and is written O2. to distinguish it from an atom of oxygen molecule of three oxygen atoms, in grams per mole or search for a chemical ... Did you mean to find the molecular weight of one of these similar formulas- 80.34.
Explanation: PLEASE MARK ME AS BRAINLIEST!
What element has an energy level Electron Configuration of 2-8-18-8?
Argon
Calcium
Krypton
Chlorine
answer:
krypton.
explanation:
it is a noble gas, so has full-valence shell. also, reference back to the periodic table.
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115 mL of a 2.35 M potassium
fluoride (KF) solution is diluted with 1.28 L of water. What is the new concentration in molarity?
? M KF
The new concentration : = 0.194 M
Further explanationGiven
115 mL(0.115 L) of a 2.35 M Potassium fluoride (KF)
1.28 L of water
Required
The new concentration
Solution
Dilution is the process of adding solvent to get a more dilute solution.
The moles(n) before and after dilution are the same.
Can be formulated :
M₁V₁=M₂V₂
M₁ = Molarity of the solution before dilution
V₁ = volume of the solution before dilution
M₂ = Molarity of the solution after dilution
V₂ = volume of the solution after dilution
V₂=0.115 + 1.28 = 1.395 L
Input the value :
M₂ = (M₁V₁)/V₂
M₂ = (2.35 x 0.115)/1.395
M₂ = 0.194
Answer: 0.194
Explanation:
HELP PLEASE!
Which below, are the smallest basic units of matter?
molecules
ozone
atoms
vitamin E
Answer:
atoms
Explanation:
Tropical climates generally __________. A. have warm temperatures year-round and little precipitation B. have warm temperatures year-round and lots of precipitation C. have warm temperatures in summer, cold temperatures in winter, and little precipitation D. have warm temperatures in summer, cold temperatures in winter, and lots of precipitation Please select the best answer from the choices provided A B C D[]
Answer:
B. Warm year round with lots of precipitation
Explanation:
GIVEN
A 2.5 L container holds a sample of hydrogen gas at 291 K and 180 kPa.
If the pressure increases to 350 kPa and the volume remains constant, what will the new temperature be?
Round your answer to one decimal place.
Answer:
The new temperature will be 565.83 K.
Explanation:
Gay Lussac's law establishes the relationship between the temperature and the pressure of a gas when the volume is constant. This law says that the pressure of the gas is directly proportional to its temperature. This means that if the temperature increases, the pressure will increase; or if the temperature decreases, the pressure will decrease.
In other words, Gay-Lussac's law states that when a gas undergoes a constant volume transformation, the ratio of the pressure exerted by the gas temperature remains constant:
[tex]\frac{P}{T} =k[/tex]
When an ideal gas goes from a state 1 to a state 2, it is true:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 180 kPaT1= 291 KP2= 350 kPaT2= ?Replacing:
[tex]\frac{180 kPa}{291 K} =\frac{350 kPa}{T2}[/tex]
Solving:
[tex]T2=350 kPa*\frac{291 K}{180 kPa}[/tex]
T2= 565.83 K
The new temperature will be 565.83 K.
Which of the following elements is used by your body? A) aluminum B) helium C) calcium D) all of the above
Visible light is a part of what spectrum
Answer:
Visible Spectrum/Electromagnetic spectrum
Explanation:
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes
the reaction?
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the
products
O The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the
products
The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the
products
O The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the
products
Answer:
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products
Explanation:
The reaction between carbon dioxide and water in the presence of sunlight to produce glucose and water strictly follows the law of conservation of mass.
Let us give the reaction expression:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
According to the law of conservation of mass, matter is neither created nor destroyed but new compounds are formed during a chemical reaction.
From the given reaction expression, we can clearly see that 6 moles of carbon on the reactant side will produce 6 moles of carbon on the product side.
Therefore, the law obeys the law of conservation of mass.
8. What is the molar mass of carbon dioxide, Co2(g)? How many grams of carbon
dioxide would there be for 3 moles? Explain.
Answer:
CO2 molar mass=44.01g
3 moles CO2 = 132.03g
Explanation:
CO2 molar mass = 12.01+2(16.00)=44.01g
3 moles CO2 * (44.01 g CO2)/(1 mol CO2)=132.03g
(Answer would be different depending on the number of decimals)
pls do this and don't just do it for the points pls help me I need it
Answer:
what do you want me to do my friend my best friend who is a dreamer
Help me with this pls
un ejemplo de cambio físico ocurre cuando: a) horneamos pan dulce. b) endulzamos el agua de limón. c) freímos los huevos. d) tostados los granos de café.
Answer:
...
Explanation:
Guys pleasee helpp 20 points
What are the three eras in the geologic time scale? *
____ power is generated from the heat released when uranium atoms split in a process known as fission.
Which statements describe the fossil record? Check all that apply.
There is very little fossil evidence for the first 4 billion years of Earth.
There is very little fossil evidence for the last 600 million years of Earth.
Most of the fossil evidence is from the first 4 billion years of Earth.
Most of the fossil evidence is from the last 600 million years of Earth.
The fossil record is complete.
The fossil record is not complete.
Answer:
A D F
Explanation:
look at attachment if you don't believe me
Calculate the mass of 4 moles of CuCl2.
What is the charge of an electron?
PLEASE HURRY
Which of the following is a subsurface event that takes place during the rock cycle?
Deposition
Erosion
Weathering
Plate tectonics
Answer:
Option D, Plate Tectonics
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
Explanation:
Answer:
Option D, Plate Tectonics
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
Explanation:
Option D, Plate Tectonics
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
