Answers
Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest halogen and is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour.
Answer:
Bromine is a nonmetal in group 7 or group 17, known as the halogens. It has 7 valence electrons.
So the correct answer is "nonmetal, 7 valence electrons"
Related Questions
If 65.85g of N2 are placed in 17.5L container, the pressure is 1988 mmHg. What is the temperature of the gas?
Answers
Answer: The temperature of the gas if 65.85g of N2 are placed in 17.5L container with a pressure of 1988 mmHg is 1780. 6° C
Explanation:
The ideal gas law states that the volume, pressure and temperature of the a gas is related to the number of moles.
It is represented thus;
P V = n R T
Parameters :
Pressure, P = 1988 mmHg
Volume, V = 17.5 L
number of moles, n = mass ÷ molar mass
mass of N2 = 65.84g
Molar mass of N2 = 28.02 g/ mol
n = 65.85 ÷ 28.02
n = 2. 350 moles.
Temperature = ?
Universal gas constant, R = 8.314 J/mol. K
Calculations :
T = P V ÷ n R
T = 1988 × 17.5 ÷ 2.350 × 8.314
T = 34790 ÷ 19. 5379
T = 1780. 6 ° C
Thus, the temperature of the gas is 1780. 6 ° C
If a radioactive sample starts with 100 g, how many grams of the original substance will be left after 5 half-lives? Please show all work.
Answers
Answer:
3.125g
Explanation:
100/2
50 1
50/2
25 2
25/2
12.5 3
12.5/2
6.25 4
6.25/2
3.125g 5
How do intermolecular forces among entities in an ideal gas compare to those among entities in a real gas
Answers
Answer:
An ideal gas has identical particles of zero volume, with no intermolecular forces between them. The atoms or molecules in an ideal gas move at the same speed. Almost all gases obey the gas laws within a limited range of pressures and temperatures.
hope this helps!
I NEED HELP ASAP!!!!!!!!!!!!
WITHIN THE HOUR
Thanks
Answers
this fossil is evidence that insects lived on earth long ago
which of these modern insects is most likely to be the closest relative of the insect in the fossil ?
Answers
Answer:
c.
Explanation:
The oldest insect fossil has been proposed to be Rhyniognatha hirsti, estimated to be 400 million years old, but the insect identity of the fossil has been contested. Global climate conditions changed several times during the history of Earth, and along with it the diversity of insects.
Answer:C
Explantion:This is The oldest insect fossil has been proposed to be Rhyniognatha hirsti, estimated to be 400 million years old
the planet saturn rotates much more rapidly than earth. this would affect the length of saturn's...
Answers
The planet Saturn rotates much more rapidly than earth, this would affect the length of Saturn's day and night.
How day and night occur?Day and night occur on any planet due to the rotation of the planet in its own axis with respect to the position of the sun.
As speed of planet Saturn is much more as compared to the speed of planet Earth. So occurring of day and night in the Saturn takes place faster as compared to earth.
Hence, length of day and night is get affected due to the fast movement.
To know kore about rotation of earth, visit the below link:
https://brainly.com/question/20797098
#SPJ1
Sodium metal (Na) reacts with chlorine gas ( Cl2 ) to produce solid sodium chloride (NaCl).
A) Write an unbalanced chemical equation for this reaction.
B) explain why the equation is unbalanced
Please help me answer A and B
Answers
The unbalanced equations are the equations with different atomic numbers on the sides of the reaction. The unbalanced reaction is Na + Cl₂ → NaCl
What are balanced equations?Balanced equations are the chemical reaction representation that has an equal number of the atomic number of the same species on the left and the right side of the reaction.
An unbalanced equation between sodium metal and chloride can be shown as:
Na + Cl₂ → NaCl
The equation is unbalanced as the number of chloride ions is more on the reactant side than the product side.
The balanced reaction will be:
2 Na + Cl₂ 2NaCl
Learn more about balanced equations here:
https://brainly.com/question/10306791
#SPJ1
Radiocarbon dating can be used to determine the age of a fossil because the amount of carbon-14 found in the fossil...
a. increases steadily over time.
b. decreases steadily over time.
c. is unaffected by time.
d. remains the same for the first 10 years, and then rapidly decreases.
Answers
Answer:
B
Explanation:
Carbon-14 will steadily decrease in a dead organism. Fossils are no different. Sense it's dead already, it will still be getting rid of the last bit of carbon-14 it has in a steadily way.
7
10 points
how many moles of nitrogen gas will occupy a volume of 0.347 l at 7.0 atm and 300 k?
"do not include a unit with your answer, just type in the number!
type your answer..
previous
Answers
Answer:
.0987 moles
Explanation:
Ideal gas law PV = n RT R = .082057 L-atm/mol-K
7 ( .347) = n (.082057) (300) n = .0987 moles
The common functions of all cells include:
Answers
Can Someone help me please…
1 How do scientists mfasure population and changes in
2 What causes populations and ecosystems to remain stable or to
change over time?
3 What factors affect populations within an ecosystem?
4 How do modest or drastic changes in ecosystems affect ecosystem
stability?
Answers
Answer:
1.Ecologists often estimate the size and density of. populations using quadrats and the mark-recapture method.
2. The two key components of ecosystem stability are resilience and resistance.
3.The availability of abiotic factors (such as water, oxygen, and space) and biotic factors (such as food) affect population
4. When the climate is changing in the colder direction it effects the planet in the opposite way than it does when it is changing in the warmer direction. Ad nauseam the contemporary, it’ll keep getting hotter and at a greater rate so the ecosystem is going to die.
-0)
2H2(g) + O2(9) - 2H20(9)
How many liters of Hy are required to form 5 moles of H20 at STP?
)
A)
)
11.2 liters
B)
22.4 liters
44.8 liters
D
112 liters
Answers
Now
At STP any gas weighs 22.4L
Volume of H_2
22.4+(5)112LHow many grams of CO₂ gas would occupy 33.7 L of volume at a temperature of
-22.2°C and a pressure of 990 mm Hg?
1.3atm
Answers
Let's see
moles of CO_2
PV=nRTn=PV/RTn=990(33.7)/(251.8)(8.314)n=15.9molMass of CO_2
Molar mass×n15.9(44)699.6gIf you have 294grams of a decaying isotope, how many grams will remain active after 4 half-lifes?
Answers
Answer:
18.375 gm left
Explanation:
1/2 ^4 = 1/16th will be left (see the '4' representing 4 half lives?)
294 * 1/16 = 18.375 gm
the non-contact forces portfolio please help I'm just confused about what I'm supposed to do.
Answers
The non-contact forces portfolio includes Gravitational force, Magnetic force and Electrostatic force.
What is non contact force?Non contact forces are those forces which are applied on any object without any physical interference or contact.
Some non-contact forces are:
Gravitational force: It acts between two objects and depends on the masses of the object and distance between that objects.Magnetic force: It acts due to the motion of the charged particles.Electrostatic force: It is a type of induced force which is generated due to rubbing of two objects but when it is generated it remains even after removing the contact of previous objects.Hence Gravitational force, Magnetic force and Electrostatic force are the non-contact forces.
To know more about non contact forces, visit the below link:
https://brainly.com/question/18451249
#SPJ1
Why knowing the density of water important to humans or society?
Answers
Answer:
it allows us to determine what substances will float and what substances will sink when placed in a liquid.
____ are designed to make necessary adjustments to place a satellite into stable orbit.
Answers
there an A B C D thing?
Explanation:
890
Answer: thrusters
Explanation: got it right
Which substance has the highest flow rate? *
water
honey
ketchup
mayo
Answers
A reef which hugs the shore?
Answers
fringing reef..........
Imagine that the human population continues to increase, but we don't monitor or implement strategies to minimize our impact on the blue crab population.
Construct an argument supported by evidence for how increases in human populations impact the consumption of natural resources. In your answer, be
sure to include:
• the relationship between human populations and the consumption of resources
• a prediction of how the blue crab population would change with an increasing human population
evidence from the resources explored during the lesson
scientific reasoning
Answers
Answer:
The Explanation
Explanation:
:i imagine less blue crabs ngl
How can you tell if a substance is an acid or base?
Answers
Answer:
To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions
The representative particle for gaseous nitrogen is the ____.
Answers
Answer:
The representative particle for gaseous nitrogen is theMolecule.Others would be the formation of precipitate, the release of energy, or change in odor.
Answers
The option that would lead to the formation of precipitation, release of energy or change in color is : Chemical change
Characteristics of Chemical changeChemical changes leads to the formation of precipitate in the form of bubbles, release of energy or change in color for example :
Rusting of Iron : As Iron rusts the color of the Iron will changeBoiling of liquid : As water or any other form of liquid boils the precipitate forms in the form of bubbles and energy in the form of heat is given offHence we can conclude that The option that would lead to the formation of precipitation, release of energy or change in color is : Chemical change
Learn more about Chemical change : https://brainly.com/question/11231920
#SPJ1
let's say these four solutions have the same concentration, which one has the highest freezing point?
a) calcium chloride
b) glucose
c) sodium chloride
d) ammonium chloride
Answers
Answer:
c) Sodium chloride
Amino acids are monomers for which biochemicals? nucleic acids polysaccharides lipids polypeptides
Answers
Answer:
polypeptides in other words proteins.
Amino acids are monomers for polypeptides. Therefore, the correct option is option D.
The chemical substances known as amino acids are what make up proteins. They are crucial for the development, upkeep, and repair of our body's cells and tissues. The distinctive structure of amino acids, which consists of a core carbon atom joined to an amino group, a carboxyl group, a hydrogen atom, and a side chain known as the R-group that varies between different amino acids, is what makes them stand out from other compounds. There are 20 different amino acids that are frequently present in proteins, each of which has a unique configuration of atoms in its R-group.
Therefore, the correct option is option D.
To know more about amino acids, here:
https://brainly.com/question/31872499
#SPJ6
What pressure will 13 moles of propane, C3H8, be in a 300 L tank when held at a constant temperature of 288 K?
Answers
The pressure of the given moles of propane with the given volume and temperature is 1.024atm.
What is Ideal Gas Law?The Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.
It is expressed as;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )
Given the data in the question;
Amount of gas n = 13molTemperature T = 288KVolume of the gas V = 300LPressure P = ?PV = nRT
P = nRT / V
P = ( 13mol × 0.08206Latm/molK × 288K ) / 300L
P = 307.23264Latm / 300L
P = 1.024atm
Therefore, the pressure of the given moles of propane with the given volume and temperature is 1.024atm.
Learn more about Ideal Gas Law here: brainly.com/question/4147359
#SPJ1
When salt is mixed in water, what is the salt and water? A)salt is the solution, water is the solute. B)salt is the solvent, water is the solute. C)salt is the solute, water is the solvent. D)salt is the solvent, water the is the solution
Answers
Answer:
in a solution of salt in water, the solute is salt, and solvent is water.
Explanation:
C) salt is the solute, water is the solvent.
Answer:
C
Explanation:
:)
A nuclear fission reaction has mass difference between the products and the reactants of 0.0593 Calculate the amount of energy released by the reaction
a. 1.09 x 10(-45)J
b. 3.28 x 10(-37)J
c. 9.85 x 10(-29)J
d. 8.86 x 10(-12)J
Answers
The amount of energy released by the reaction b. 3.28 x 10(-37)J
What is a nuclear fission reaction?A nuclear fission reaction in which the nucleus is divided into numerous small nuclei.
The mass difference is 0.0593
To calculate the energy
[tex]E = \Delta mc^2\\\\c = 3 \times 10^8\;m/s\\\\m = 3.86 \times 10^-^3 \;kg\\[/tex]
Putting the values in the equation
[tex]E = (0.0593) (3 \times 10^8\;m/s)^2 = 5.337 \times 10^1^5[/tex]
Thus, the correct option is b. 3.28 x 10(-37)J
Learn more about nuclear fission reaction
https://brainly.com/question/913303
#SPJ1
Type the correct answer in the box. express your answer to three significant figures. the gas inside a large engine cylinder initially has a pressure of 105 kilopascals and a volume of 2.031 liters. if the gas is compressed at constant temperature to a volume of 0.356 liter, what is its new pressure? the pressure of the compressed gas is kilopascals.
Answers
The new pressure of the gas would be 599.03 kilopascals
Boyle's lawsBoyles postulated that the pressure of any gas would be inversely proportional to its volume if the temperature of the gas remains unchanged.
Mathematically: P1V1 = P2V2
In this case, P1 = 105 kilopascals, V1 = 2.031 liters, V2 = 0.356 liters.
P2 = P1V1/V2 = 105 x 2.031/0.356 = 599.03 kilopascals
Thus, the new pressure will be 599.03 kilopascals.
More on Boyle's law can be found here: https://brainly.com/question/1437490
#SPJ4
Answer: 599
Explanation:
cuz i got the answer right on the test
identify two ways recycling can reduce energy use?
