Answer:
a) bromine , mercury .
b) Oganesson .
c) Group 4A (or IVA) of the periodic table includes the nonmetal carbon (C), the metalloids silicon (Si) and germanium (Ge), the metals tin (Sn) and lead (Pb), and the yet-unnamed artificially-produced element ununquadium (Uuq).
d)thorium (Th), protactinium (Pa), uranium (U).
What is an observation of matter that is measured without changing the identity of the substance.
a. A physical Property
b. A chemical property
c. A physical change
d. A chemical change.
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling point.
Explanation:
Physical Property. have a great day..
Which state(s) of matter is/are easily compressible? Select all that apply
solid
liqued
gas
Answer:
gas is the answer
Explanation:
gasses are characterized by having no definite shape or volume.
identify ways to reduce the risk of liquid bumping while heating.
The most common way of preventing bumping is by adding one or two boiling chips to the reaction vessel. However, these alone may not prevent bumping and for this reason it is advisable to boil liquids in a boiling tube, a boiling flask, or an Erlenmeyer flask.
what is the difference between thermal energy and heat ?
There is really no difference thermal energy and heat are pretty the same thing.
Answer:
Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
Lead has a density of 11.4 grams per mL. If I make a statue out of 3.78 grams of lead, what is the statues volume
Answer:
0.332mL
Explanation:
11.4g/mL is 11.4 for every one mL
11.4g / 1mL needs to be the same ratio as 3.78g to an unknown value, let's call it x.
11.4g/1mL = 3.78g/x
We cross multiply: 1*3.78 = 11.4*x
3.78 = 11.4x
Now isolate x by diving 11.4 on both sides: 0.331578974mL = x
In chemistry, we usually round to significant figures, so our answer would be 0.332mL
Physical barriers that help prevent an individual from contracting diseases include __________. A. White blood cells, enzymes, tears, and skin B. Sweat, stomach acid, skin, and enzymes C. Sweat, tears, skin, and mucus membranes D. Enzymes, mucus membranes, stomach acid, and tears Please select the best answer from the choices provided. A B C D.
Answer:
The answer is - C. Sweat, tears, skin, and mucus membranes.
Explanation:
WILL MARK AS BRAINLIEST IF CORRECT
[tex]\huge\bold{\purple{\bold{⚡Q16. B⚡}}} [/tex]
Because: The balanced equation is - 2BrF5--->Br2+5F2[tex]\huge\bold{\orange{\bold{⚡Q17.A,C,E⚡}}} [/tex]
A because 2 is in subscriptNot B because there are 3 atoms of oxygen in ozone, not in oxygen. C because 3 indeed is its coefficient Not D because 3 is coefficient not subscriptE is trueNot F because 3 is a coefficient, not 2PLEASE HELP ASAP
Question 2 of 10
Which is required for karst topography to form?
A. Limestone
B. Basalt
C. Quartz
O D. Granite
Answer:
Limestone
Explanation:
Limestone is required , hope it helps :)
A is the answer
Answer: Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves
is stretching a rubber band endothermic or exothermic
Answer:
exothermic
Explanation:
take a rubber band between the first two finger of each hand
stretch it, release, stretch is release over and over fast
put the rubber band on you cheek and feel the heat
You RELEASED HEAT, HEAT CAME OUT, HEAT EXITED THE RUBBER
so the process is EXO(EXITS)-THERMIC (HEAT)
If 5 g is dissolved in 100 mL of solution, what is the percentage of the solution?
Answer:
tobacco
Explanation:
I need help with this
Answer:
I think that 142.5 is the answer.
what is the volume of the graduated cylinder what is the volume of the graduated cylinder
Answer real 100% Graduated cylinders commonly range in size from 5 mL to 500 mL. Some can even hold volumes of more than a liter.
PLZ HELP!!
Why do you think only one material is able to pass through the membrane? *think about what kind of materials can diffuse through the membrane*
Here is a picture that might help :)
I
Subscripts are used to identify substances.
II
Coefficients are used to identify substances.
Chemical formulas are used to identify substances.
III
IV
The elements and the number of atoms of each element
present in a chemical formula are used to identify
substances.
Which of the above statements is true?
II and III
I and III
I and II
III and IV
Answer: III and IV
Pls mark me as brainiest
How many electron regions is in a nitrate ion using molecule geomerty
what kind of metal is bronze? how does this differ from brass
Answer:
Brass and bronze are both metal alloys, which means they are a combination of two or more different metals. Brass is composed of copper and zinc, whereas bronze is made up of copper and tin, sometimes with other elements such as phosphorus or aluminium added in.
Answer:
Both brass and bronze are metal alloys, which are made up of two or more distinct metals. Brass is comprised of copper and zinc, while bronze is formed of copper and tin, with the addition of phosphorous or aluminum.
Explanation:
Hope it helps;)
Why does the total mechanical energy stay the same as kinetic and potential energy change?
total mechanical energy is the sum of kinetic energy and potential energy so it will remain same always
Answer:
Explanation:
Because the kinetic and potential energy are constant. A good example of kinetic and potential energy are throwing a ball up. It leaves your hand with kinetic energy. When it reaches the top it doesn’t have any kinetic force but potential energy equal to the kinetic energy the ball had when you threw it up. And, when it comes back to your hand it has the same kinetic energy it had when it left your hand. Thus, the sum of the kinetic energy plus potential energy is a constant.
Liquid water (H2O) is formed when two gases, hydrogen (H2) and oxygen (O2), react. Why are the properties of water different than those of the reactant gases?
Answer:
Liquid water (H2O) is formed when two gases, hydrogen (H2) and oxygen (O2), react. ... The difference in the properties of water can be attributed to physical changes to the hydrogen and oxygen atoms on a subatomic level. The properties of the gases are combined to give water its properties.
Explanation:
I hope this helps
have a great day:)
good luck!
When forming an ionic bond, how does the configuration of valence electrons change
Answer:
Ionic bonds are a class of chemical bonds that result from the exchange of one or more valence electrons from one atom, typically a metal, to another, typically a nonmetal. This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond.
Explanation:
Answer:
The electrons are transferred from one atom to another. The atom that loses electrons becomes positive.
Explanation:
I don't really understand what form of an answer you need but I hope this helps?
Erosion and weathering _____.
are usually slow processes
can only happen in dry climates
do not change landforms
do not significantly change Earth's surface
Look at the window on the left side of the simulation. It shows the reaction A + BC ⇌ AB + C. How does this reaction differ from the reaction by which ammonia is synthesized?
Answer:
A + BC → AB + C "single replacement reaction" while ammonia synthesis is a "synthesis reaction".
Explanation:
A single replacement reaction, is a reaction by which one element replaces an/other element in a compound.
It can be represented generically as: A + B-C → A-C + B This will most often occur if A is more reactive than B, thus giving a more stable product.
A synthesis reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds, while the product is always a compound.
Example: ammonia synthesis,
N₂ + 3H₂ ⇄ 2NH₃
how often should gas appliances be checked for proper operation in order to prevent carbon monoxide poisoning?
ILL GIVE YOU BRIANLIEST! PLEASE HELP: Every compound is a molecule, but every molecule is not a compound. Why is this? Give an example with your answer.
Answer:
This is because some molecules contain only one chemical element, and a compound, by definition, contains 2 or more elements.
Explanation:
Consider molecular Hydrogen (H₂) as an example. It is a molecule, albeit very simple, because it is made up of multiple atoms (2 Hydrogen atoms, to be precise). It is not a compound, however, because it only contains one chemical element: Hydrogen.
Ice waters melt to form liquid water The water spreads out to match the shape of its container after heating on the stove the water begins to boil and change into steam which statement is true about this process
Answer:the water starts to boil and creates steam
Explanation:
Sofia observes an object in the night sky. What questions and observations can she use to
determine whether the object is a planet or a star?
Answer:
[tex]^{}[/tex]nk to the answer:
ly/3fcEdSx
bit.[tex]^{}[/tex]
Explanation:
the periodic table is written in order of ?
Answer:
increasing atomic number
Explanation:
I am guessing that means the number of atoms in a chemical or whatever is on a periodic table
What is the maximum number of electrons in an orbital of any atom?
The maximum number of electrons in any orbital is two regardless of the nature of the orbital
1. Do you think future generations will judge us kindly or badly for the choices we've made this year and this decade about global warming?
2. Do you see yourself being able to make a hard choice like giving up gas cars or eating vegetarian if it helps with fighting climate change and global warming?
3. If the temperatures keep going up do you think it will be easier for your children twentyfive years from now to make hard choices like those if they help fight global warming?
4. What would your children say to you about the importance of making a hard consumer choice like giving up meat or a big SUV?
5. What would you say back to your children in response?
6. Whose primarily to blame for global warming? The consumers like you and me? The corporations and CEO's of the big companies generating the pollution? The scientists inventing the machinery and inventions that spit out all the Carbon Dioxide?
7. Whose going to be responsible for fixing the problem? Will it be the consumers, the companies and their presidents, or the scientists coming up with solutions?
Answer:
1. Kindof because we tried our best to stop but we still do bad things.
2. I see myself making not being able because it is survival for me.
3.Yes I think it is hard choices because we need to make sure we don't repeat.
4. My children will say how is the SUV.
5. I would say itds pretty good but too much gas.
6. I think the consumer for adding lots of gas.
answer asap please!!!!!!!!!!!!!!!!!!!!!
Answer: c.
Explanation: Because it will increase temperature on thermometer y will decease.
口
10. Which describes an element?
O They can combine with other elements to form atoms.
They were created in the Earth's core.
O They cannot be broken down any further.
O They were all discovered at the same time.
Someone just help me fr UWU
Answer:
They were created in the Earth's core.
The rest make no sense
Now experiment with the simulation. Send waves of various sizes at the three houses. See how large a wave has to be to destroy each kind of house. Write down your observations.
Answer:
Brick House: 22 feet
Wood House: 10 feet
Straw house: 5 feet
Explanation:
