Answer:
no definite shape
Explanation:
Answer:
Liquids have no definite shape (takes the shape of its container) they have a definite volume. Particles are free to move over each other, but are still attracted to each other.
Explanation:
Hope this helps!
Science 3 questions with brainliest
Answer:
#1 is c #2 is d and #3 isd
Explanation:
WILL MARK BRAINLEST
Which of the following are sources of greenhouse gasses? Select all that apply
a
Bike Riding
b
Cow Farts
c
Growing Trees
d
Burning Coal
e
Car Exhaust
Answer:
b and c
Explanation:
sorry if i'm wrong
Answer:
b, c, d, e
Explanation:
If the volume of a gas is 1020 ml at 120°C and 1160 torr, what will the volume be at 20°C and 700 torr?
Answer:
1260 mL
Explanation:
Use formula (P1V1)/T1 = (P2V2)/T2
convert C to K
120 +273 = 393 K
20 + 273 = 293 K
plug numbers in
((1160)(1020))/ 393 = ((V2)(700))/ 293
solve for V2
V2 = 1260.187 mL
A gas is most likely to change the liquid phase in the pressure of the gas
Answer: if pressure rises in closed vessel and temperature is low enough,
Gas may condense to liquid state
Typically, this happens when we raise the pressure at room temperature, but there are other situations that aren't covered, including lowering the temperature at room pressure.
What is temperature?Temperature is defined as a measurement of an object or substance's warmth or coldness in relation to a standard value. As opposed to extensive characteristics, like mass or volume, temperature is referred to as an intense property—one that is independent of the quantity of matter being considered—along with pressure, density, and other comparable properties.
If the temperature is low enough and pressure rises in a closed vessel, A gas can turn into a liquid form.
Thus, typically, this happens when we raise the pressure at room temperature, but there are other situations that aren't covered, including lowering the temperature at room pressure.
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State and explain the three basic properties of element
Answer: Some are solid, some are gaseous, a few are liquid. Some are metallic: they have a peculiar lustre; some are coloured (like sulfur) or colourless. Some have a low density; some have a high density. Some are malleable and ductile; some are brittle. Some conduct electricity and heat well; some don’t.
Many metals tend to have structural uses. Nonmetallic elements less so.
Metals tend to have crystal forms featuring close-packed centro-symmetrical structures. Nonmetallic elements tend to have crystal structures featuring more open and directionally packed structures.
Some are especially toxic; some are essential to life; some are both depending on exposure level.
Most are stable; some are less so.
Some elements are highly reactive; some are almost inert (helium, neon, and argon may be completely inert in ambient conditions).
Many metals have basic oxides; quite a few oxides of nonmetallic elements form acids when they are dissolved in water. Some elements can go both ways.
There are many generalisations you can make about metallic and nonmetallic elements, and quite a few exceptions at the margins.
Explanation:
State and explain the three basic properties of element.
Answer :-Some properties of an element can be observed only in a collection of atoms or molecules of the element. These properties include color, density, melting point, boiling point, and thermal and electrical conductivity.
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Answered by - ItzMaster
Given the reaction: HNO2 (aq) <-> H+ (aq) + NO2- (aq); write the ionization constant for the reaction.
Answer:
see explanation
Explanation:
HNO₂ ⇄ H⁺ + NO₂⁻
Ka = [H⁺][NO₂⁻]/[HNO₂]
Study the map. Then use the drawing tool to create a model of how the two air masses look when they interact at front 1.
Answer: Picture
Explanation: I got it right
Answer:
2 and 3 look like a cold front in front of 1.
Explanation:
3 is an occluded front which occurs when a cold air mass devours a warm air mass and then collides with another cold mass. 2 is a warm air mass, and 1 is a cold air mass.
what type of cells are these?
(Plant or animal)
Answer:
5 is an animal cell, 6 is a plant cell
Explanation:
hope this helps!
what kind of elements form ionic compounds?
Answer:
Ionic compounds generally form between elements that are metals and elements that are non metals. For example, the metal calcium (Ca) and the non metal chlorine (Cl) form the ionic compound calcium chloride (CaCl2). In this compound, there are two negative chloride ions for each positive calcium ion.
Explanation:
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HELP!!! WILL GIVE BRAINLYEST!!!!!! Record the Gas concentration associated with each of these time periods. (Note: ppm= parts per million)
Answer:
Explanation:
u need to go to the Greenhouse Effect Simulation (link is in ur Q).
open it and select the Greenhouse effect tab. Note that the concentration of various atmospheric gases during past eras can be determined by looking at gases trapped in ancient ice, such as that found in Antarctica.
On the right hand side panel of the simulation, under “Atmosphere during,” you can select Today, 1750, and Ice Age as historic time periods.
run simulations n collect the gas composition data.
Answer:
Explanation:
The question provides a link to the Greenhouse Effect Simulation. Results are from that:
Time Period H2O %RH CO2 ppm CH4 ppm N2O ppm
Today 58F 70% 338ppm 1843ppm 0.317ppm
1750 58F 70% 280ppm 0.730ppm 0.270ppm
Ice Age 36F ? 180ppm 380ppm 0.215ppm
What type of substances can we separate using electrolyisis and why?
Answer:
ionic substances because they contain charged particles
11. A chemical reaction happens when chemicals combine to form a new _______
Answer:
substances
Explanation:
A chemical reaction happens when substances break apart or combine to form one or more new substances.
^Hope it helps, Hazel^
3. The hydroxide-ion, [OH-], concentration in a detergent solution is 1.0 x 10-3 M. What is [H+] concentration in the detergent solution?
A) 1.0 x 10^-11 M.
B) 1.0 x 10^-9 M.
C) 1.0 M
D) 0.001 M
Answer:
c
Explanation:
h
A 220.0 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is
pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310 K. What is the new
pressure of the sample?
274 kPa
216 kPa
Piston
243 kPa
51.1 kPa
Answer:
Explanation:
what did you get?
zinc + hydrogen arsenate—>
What type of reaction is this? (Synthesis, Decomposition, or Single Replacement?
Answer:
Single Replacement
Explanation:
im just smart lol
How much more heat does it take to vaporize 1 mole of ethanol than to melt it?
Answer:
I do not know how to solve this bit i THINK 38.56
Explanation:
Barium + Aluminum nitrate —> makes what ?
Answer:
Aluminum sulfate with barium nitrate to produce burin and aluminum nitrate
Aluminium hydroxide and barium nitrate are produced as a result of the chemical reaction between barium and aluminium nitrate. The reaction's balanced equation is as follows: [tex]2 Al + 3 Ba (NO_3)_3 \rightarrow 3 Ba(NO_3)_2 + 2 Al(OH)_3[/tex]
Chemical reactions are essential natural processes that take place and are in charge of the innumerable alterations and transformations we experience every day. They include the forming and breaking of chemical bonds between atoms, which causes the atoms to be rearranged to produce new compounds with various properties. The concepts of mass and energy conservation control chemical processes. The idea of balanced chemical equations came about because the total number of atoms of each element involved in a reaction stays constant both before and after the reaction. Aluminium hydroxide and barium nitrate are produced as a result of the chemical reaction between barium and aluminium nitrate. The reaction's balanced equation is as follows: [tex]2 Al + 3 Ba (NO_3)_3 \rightarrow 3 Ba(NO_3)_2 + 2 Al(OH)_3[/tex]
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What fossil helped support Wegener's hypothesis of continental drift?
A. Gondwanaland
B. Kannemeyerid
C. Mesosaurus
D. Glossopteris
Answer:
Glossopteris
Explanation:
Glossopteris is a fossil fern that helped support Wegener's hypothesis.
Hope this helps! Have a great day!
Rubidium Rb
when was the element discovered and by whom ??? ASAP MAKE IT AT LEAST A PARAGRAPH!!!
Answer:
Rubidium Rb was discovered in 1861It was discovered by the German chemist Robert Wilhelm Bunsen and the German physicist Gustav-Robert KirchoffExplanation:
Rubidium was discovered by the German chemists Robert Bunsen and Gustav Kirchhoff in 1861 while analyzing samples of the mineral lepidolite with a device called a spectroscope. The sample produced a set of deep red spectral lines they had never seen before. Bunsen was eventually able to isolate samples of rubidium metal. Today, most rubidium is obtained as a byproduct of refining lithium.
Which do you think has the greater total kinetic energy?
a. The molecules of the water in the teacup
b. The molecules of the water in the bathtub
Answer:
a The molecules of the water in the teacup
hope it helps
THIS IS A THREE PART QUESTION IF YOU CAN HELP IT WOULD BE REALLY APPRECIATED SO I DONT FAIL.
1. If I add 2.65L of water to 245 grams of sodium acetate, what is the molarity of the NaC2H3O2 solution?
A. 10.8 m
B. 1.13 m
C. 1.08 m
D. 92.4 m
2. If I add 2.65 L of water to 245 grams of sodium acetate, what is the % by mass of NaC2H3O2 in this solution?
A. 8.46%
B.1.12%
C.10.8%
D.9.25%
3. If I add 2.65 L of water to 245 grams of sodium acetate, what is the mol fraction of NaC2H3O2 in this solution?
A. 0.203
B. 0.0846
C. 0.108
D. 0.0199
Answer:
1. B = 1.13M
2. A. 8.46%
3. D = 0.0199
Explanation:
1. Molarity of a a solution = number of moles of solute/ volume of solution in L
Number of moles of solute = mass of solute/molar mass of solute
Molar mass of NaC₂H₃O₂ = 82 g/mol, mass of NaC₂H₃O₂ = 245 g
Number of moles of NaC₂H₃O₂ = 245 g / 82 g/mol = 2.988 moles
Molarity of solution = 2.988 mols/ 2.65 L = 1.13 M
2. Percentage by mass of a substance = mass of substance /mass of solution × 100%
Mass of 2.65 L of water = density × volume
Density of water = 1 Kg/L = 1000 g/L; volume of waterb= 2.65 L
Mass of water = 1000 g/L × 2.65 L = 2650 g
Mass of solution = mass of water + mass of solute = 245 + 2650 =2895 g
Percentage by mass of NaC₂H₃O₂ = 245/2895 × 100% = 8.46%
3. Mole fraction of NaC₂H₃O₂ = moles of NaC₂H₃O₂/moles of solution
Moles of water = mass /molar mass
Mass of water = 2650 g; molar mass of water = 18 g/mol
Moles of water = 2650 g / 18 g/mol = 147.222 moles
Moles of solution = moles of solute + moles of water = 147.222 + 2.988 = 150.21
Moles of NaC₂H₃O₂ =2.988 moles
Moles fraction of NaC₂H₃O₂ =2.988/150.21 = 0.0199
1.
What is Mendeleev is known for?
A. creating today's atomic model
B. discovering protons
C. publishing the first periodic table
D. discovering Mendelevium
Answer Choice: C
Explanation: Mendeleev is best known for publishing the first periodic table of elements in 1869, revolutionizing the world's understanding of physics and chemistry; and, really almost every aspect of science.
What is the density of krypton gas (MM = 83.8 g/mol) at 3.00
atm and 100. °C?
g/L
Answer:
8.21
Explanation:
Balance the following equation: Fe2O3 + H2O --> Fe(OH)3
A.3,2,1
B.2,2,3
C.1,3,2
D.5,2,10
Answer:
answer is c
Explanation:
hope it helps!!!
Waves that we cannot actually see (unlike ripples in water) and that DO NOT need a medium to travel through belong to which category of waves?
Answer:
electromagnetic waves
Explanation:
The waves that do not need a medium to travel through are known as electromagnetic waves.
What are electromagnetic waves?These waves do not need any medium for their propagation or traveling. The waves have different wavelength and energy factors depending upon their rate of propagation. EMR waves travel from the sun to the earth in space.
Examples of electromagnetic waves are Xrays, gamma rays, radio waves, and more.
Find more information about electromagnetic waves here:
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State one type of additional information that could be used to determine if these three species are closely related.
Answer:
Study the bone structure of limbs.
Explanation:
Study the bone structure of limbs can be used to find out the relatedness and relationship among three species because the pattern of bones structure is similar but the structure is different from one another due to different environmental conditions. This study provides important and useful information whether the three species are closely related or not. If they have similar bone structure than we can say that there are more chances that they are closely related to each other.
Is hydrogen a metal or a nonmetal? How many valence electrons does a hydrogen atom have?
Answer:
hydrogen is a non-metal and it has 1 valence electron
Explanation:
You can find the valence electrons on the bottom left of your periodic table, it is under the atomic number. Hydrogen is a non-metal because hydrogen conducts heat and electricity poorly.
What is the charge of a Li ion?
A. +1
B. +2
C. -1
D.-2
Answer:
A
Explanation:
because the charge of Li ion is +1 well I don't know the explanation yet but I'm sure about the answer
Which unit is commonly used for measuring pressure?
O m3
O bar
O N/m3
O Celsius
Answer:
3
Explanation:
Answer:
bar
Explanation:
yes
Show work for all math problems. Make sure to have the correct unit and significant figures in your each answer.
Convert 2.35 atm to mmHg.