Answer:
Group 1 elements tend to react with group Group 17 elements to form alkyl halide.
How many Joules of energy are required to boil 350g of water at 100 degrees Celsius?
Answer:
[tex]Q_{vap}=7.90x10^5J[/tex]
Explanation:
Hello!
In this case, since this is the vaporization process of water, we need to keep in mind that the enthalpy of vaporization of this compound is 2.256 kJ/g, for 350 g, we obtain:
[tex]Q_{vap}=m*\Delta H_{vap}\\\\Q_{vap}=350g*2.256\frac{kJ}{g} *\frac{1000J}{1kJ} \\\\Q_{vap}=7.90x10^5J[/tex]
Because the process is carried out at 100 °C, the boiling temperature of water, already.
Best regards!
A solid reactant is placed into a beaker of a warm water. The liquid vigorously bubbles as the solid dissolves into the solution. What will most likely happen if the temperature of the liquid is slightly reduced?
Answer:
Fewer bubbles will be produced because of fewer collisions of reactant molecules
Explanation:
As the solid dissolves into the solution after the liquid has been vigorously bubbled, if the temperature of the liquid is reduced a little, what will happen is that fewer bubbles will be produced as a result of lesser amount of collisions occurring between the reactant molecules
Density of gold is 19.3g/cm^3 what is the density in lbs/in^3 units
The density in lbs/in³ units : 0.697
Further explanationGiven
Density of gold is 19.3 g/cm³
Required
Conversion to lbs/in³
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
Conversion factor
1 g = 0,00220462 lbs
1 cm³ = 0,0610237 in³
So the density :
[tex]\tt 19.3~\dfrac{g}{1~cm^3}\times \dfrac{cm^3}{0.0610237~in^3}\times \dfrac{0.00220462~lbs}{1~g}=0.697~lbs/in^3[/tex]
The atomic number of an element is ____________________.
a. the number of protons in each atom of the element.
b. 1 mol of the element.
c. the number of neutrons in each atom of the element.
d. the mass of the element.
Answer:
a & b both are correct. But if you want only one answer, then it's 'a'
Please help I will mark brainliest
Explanation:
light blue is the answer second one
Evapotranspiration is the process by which
O plants give off water vapor as a waste product as they process energy.
O evaporated water moves through the air and causes differences in climate.
O None of the above.
O rock is shaped as water evaporates off of its surface.
Answer:
A: plants give off water vapor as a waste product as they process energy
Explanation:
Evapotranspiration in plants is defined as the process whereby water is evaporated from its leaves through transpiration during the process of photosynthesis. Different factors like wind, humidity, temperature and availability of water could make it vary.
Comparing all the options, to this definition, the correct answer is Option A.
5. What is the wavelength of a radio station emitting its signal at 95.5 MHz? Estimate your
answer to the nearest power of ten.
Answer:
[tex]\lambda=314\times 10^{-2}\ m[/tex]
Explanation:
Given that,
Frequency, f = 95.5 MHz
We need to find the wavelength of a radio station emitting its signal.
The relation between the frequency and the wavelength is given by :
[tex]c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{95.5\times 10^6}\\\\=3.14\ m[/tex]
or
[tex]\lambda=314\times 10^{-2}\ m[/tex]
So, the wavelength of a radio station is [tex]314\times 10^{-2}\ m[/tex].
Plasma is rare on Earth but plentiful in the universe.
A True
B False
Answer:
I think it is a
Explanation:
Plasma is the fourth fundamental state of matter after solid, liquid and gas. At this stage of matter it exists in the form of a gas of ions and free electrons and is highly electrically conductive. Although plasma is abundant in the universe, natural occurrences are relatively rare here on Earth.
question: convert 22.63 miles of oxygen to volume
very urgent
Answer:
506.912 L
Explanation:
From the question given above, the following data were obtained:
Number of mole of O₂ = 22.63 moles
Volume of O₂ =?
Recall:
1 mole of a gas occupy 22.4 L at STP.
With the above information, we obtained the volume occupied by 22.63 moles of O₂ as follow:
1 mole of O₂ occupied 22.4 L at STP.
Therefore, 22.63 moles of O₂ will occupy = 22.63 × 22.4 = 506.912 L at STP.
Thus, 22.63 moles of O₂ is equivalent to 506.912 L.
someone please help me with this vocab
Answer:
1) digestion
2) hydroxide ion
3) neutralization
4) pH scale
5) hydrogen ion
6) chemical digestion
7) mechanical digestion
8) salt
Explanation:
I might be wrong though.
Answer:
1) digestion
2) hydroxide ion
3) neutralization
4) pH scale
5) hydrogen ion
6) chemical digestion
7) mechanical digestion
8) salt
Explanation: I just saw this ik its probably really late but i just decied
to give it a try
A technician measures the weight of a reagent . The weight is 3269 g. What is the weight in kilograms ? Write your answer as a decimal
Answer:
3.269 kg
Explanation:
1000g = 1 kg. Since kg is the larger unit, you need to divide by 1000 to get kilograms. You can do the problem as a unit conversion:
3269 g × 1 kg = 3.269 kg
1000g
Hope this is helpful!
What is the wavelength of a 229 Hz sound wave moving at a speed of 345 m/s?
Answer:
wave length=speed/frequency
=345/229
Which of these pH values indicates a basic solution?
Answer:
The pH scale is often said to range from 0 to 14, and most solutions do fall within this range, although it's possible to get a pH below 0 or above 14. Anything below 7.0 is acidic, and anything above 7.0 is alkaline, or basic.
Explanation:
brainliest plsssssssss
The pH value that indicates a basic solution is if the pH of solution lies between 7 to 14 in the pH scale.
Basic solution is a solution whose pH is more than 7, indicating that it is alkaline or basic in nature. Basic solutions have a lower concentration of hydrogen ions [tex]\rm (H^+)[/tex] than pure water, which has a neutral pH of 7.0.
Basic solutions can be created by dissolving certain salts or bases in water, such as sodium hydroxide (NaOH) or potassium hydroxide (KOH).
Therefore, if the pH of a solution is more than 7 it is said to be basic in nature.
Learn more about basic solution here:
https://brainly.com/question/3449428
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Calculate the H3O+ concentration and then pH in a 0.100 M HC2H3O2 solution that is
1.34% loniped?
HC2H3O2(aq) + H2O(l) > H30(aq) + C2H302- (aq)
Answer:
Please check with the attachment posted.
Please do confirm the answer.
How many chromium atoms are in 3.56 x 10^-21 moles of potassium chromate?
Answer:
21.44× 10² atoms
Explanation:
Number of chromium atoms = ?
Moles of potassium chromate = 3.56 × 10⁻²¹ mol
Solution:
1 mole of K₂CrO₄ contain 1 mole of Cr.
3.56 × 10⁻²¹ moles of K₂CrO₄ contain 3.56 × 10⁻²¹ moles of Cr.
Number of atoms of Cr:
1 mole contain 6.022× 10²³ atoms
3.56 × 10⁻²¹ mole × 6.022× 10²³ atoms / 1mol
21.44× 10² atoms or 2144 atoms
What is this element help asap
Explanation:
In this element, there are:
11 protons (in blue)12 neutrons (in red), and11 electrons (in green)We find the element with atomic number 11, which is Sodium. (Na)
Answer: sodium
Explanation:
Definition: This is two or more elements chemically combined in a fixed ratio.
Answer:
Compound
Explanation:
Compounds – Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
Example of compounds includes water (H2O), Hydrogen Peroxide (H2O2), etc. You could see water’s chemical formula, it says it has 2 atoms of Hydrogen combined with 1 atom of oxygen and in hydrogen peroxide, it has 2 atoms of hydrogen and two atoms of oxygen.
Which of the following is a chemical weathering agent?
1.) acid produced by plants growing on rocks
2.) growing tree roots
3.) burrowing animals
4.) ice wedging
PLEASE HELP ME FAST ASAP
Answer:
1. acid produced by plants growing on rocks
plz give me BRAINLIEST answer
Give 5 examples of limiting factors
Answer:biotic, like food, mates, and competition with other organisms for resources.
Explanation:
What happens when there is a cluster of sunspots?
Answer:
a cluster of sunspots will results in extreme solar flares that can cause mass disruption of electronics on earth.
How many molecules are there in a 42.3 g sample of water, H2O?
Answer:
In order to figure out how many molecules of water are present in that
48.90-g
sample, you first need to determine how many moles of water you have there.
As you know, a mole is simply a very large collection of molecules. In order to have one mole of something, you need to have exactly
6.022
⋅
10
23
molecules of that something - this is known as Avogadro's number.
In order to get to moles, you must use water's molar mass. A substance's molar mass tells you the mass of one mole of molecules of said substance.
Water has a molar mass of
18.015 g/mol
. This means that one mole of water molecules has a mass of
18.015 g
.
So, to sum this up,
6.022
⋅
10
23
molecules of water will amount to
1 mole
of water, which in turn will have a mass of
18.015 g
.
Explanation:
Which wave can travel in both empty space and matter?
(10 Points)
A. radio
B. seismic
C. sound
D. water
Seismic waves can move through both empty space and matter. Electromagnetic waves differ from sound waves in this regard because they do not require molecules to move.
What are earthquake waves?Seismic waves are waves that pass through or over the Earth. They can also be caused by explosions, volcanoes, landslides, and earthquakes, which are movements of the Earth's tectonic plates. They can reveal a lot about the Earth's composition. Earthquakes are caused by sudden movement along Earth's fault lines. Seismic waves, which cause damage by traveling through the Earth, are created when movement releases energy from the "elastic strain" that has been stored.This means that electromagnetic waves can travel through solid materials like air as well as across space. Astronauts use radios in this manner to communicate while on spacewalks. Radio waves are an example of an electromagnetic wave.To learn more about earthquake waves refer to:
https://brainly.com/question/26360015
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WHAT ELEMENT IS THIS
Answer: emission spectrum
Explanation:
HELLLLPPPPP PLeeease help im so tired and i need to SLEEP. Answer the 1s you know
1. How does the mechanical energy of a ball that is starting to fall compare to its total energy just before it hits the floor?
2. When you stand in sunlight, what form of energy is emitted by the sun?
3. An eye doctor wants to design reading glasses that also function as sunglasses. Should the eye doctor use a reflective-transparent material or a reflective-opaque material for the lenses? Support your claim.
Answer:
All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.
Answer:
1 kinetic and potential 3 reflective transparent
Suppose an AM talk radio station broadcasts radio waves with a frequency of 930. kHz. Calculate the wavelength of these radio waves.
Round your answer to 3 significant digits.
Answer:
323 m.
Explanation:
From the question given above, the following data were:
Frequency (f) = 930 KHz
Wavelength (λ) =?
Next, we shall convert 930 KHz to Hz. This can be obtained as follow:
1 KHz = 1000 Hz
Therefore,
930 KHz = 930 KHz × 1000 Hz / 1 KHz
930 KHz = 93×10⁴ Hz
Thus, 930 KHz is equivalent to 93×10⁴ Hz
Wavelength (λ) of a wave and the frequency (f) are related according to the equation:
Velocity = wavelength × frequency
v = λf
With the above formula, we can obtain the wavelength of radio wave as follow:
Frequency (f) = 93×10⁴ Hz
Velocity (v) of electromagnetic wave = 3×10⁸ m/s
Wavelength (λ) =?
v = λf
3×10⁸ = λ × 93×10⁴
Divide both side by 93×10⁴
λ = 3×10⁸ / 93×10⁴
λ = 323 m
Thus, the wavelength of the radio wave is 323 m
Which of the following most affects the function of a molecule?
O A. Mass
O B. Solubility
O C. Color
O D. Structure
Answer:
Structure
Explained:
Answer:
d
Explanation:
a p e x :)
Find the wavelength of the electromagnetic radiation with a frequency of 3x10^-18Hz PLEASE ANSWER
Answer:
λ = 1×10²⁶m
Explanation:
Given data:
Wavelength of radiation = ?
Frequency of radiation = 3×10⁻¹⁸Hz
Solution:
Formula:
c = f × λ
c = speed of wave = 3×10⁸ m/s
by putting values,
3×10⁸ m/s = 3×10⁻¹⁸Hz × λ
λ = 3×10⁸ m/s / 3×10⁻¹⁸s⁻¹
λ = 1×10²⁶m
List 2 types of bacteria
"Spherical: Bacteria shaped like a ball are called cocci, and a single bacterium is a coccus. Examples include the streptococcus group, responsible for “strep throat.”
Rod-shaped: These are known as bacilli (singular bacillus). ...
Spiral: These are known as spirilla (singular spirillus). " - Medical News Today
Water + Heat
What is proof of a Chemical Reaction?
6) Mendeleev put the elements on the periodic table in the order of how
many
it has. *
O electrons
O neutrons
O protons
Answer: Protons
Explanation: