Answer:
Part A:
A physical change is a change of a substance from one form to another without changing its composition.
Part B:
A physical change is a change of a substance from one form to another without changing its composition. Example: A balloon deflating into its original form.
A chemical change occurs, one substance combines with another substance to make something completely new. Example: Making and baking a cake.
Name a substance that is made of individual atoms instead of moleules and explain why
Is this correct?
If the temperature is below the melting point the substance is a solid
If the temperature is above the boiling point the substance is a gas
If the temperature is in between the boiling and melting points the substances a liquid.
If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature.
If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid.
Plz help! :) :D I will mark you as BRAINLIEST!!!
Physical and Chemical Properties of Magnesium
Here is an EXAMPLE of how it has to be like. Instead of Mercury, you HAVE to do Magnesium
Physical Properties of Mercury: ”I’m a highly stable element, so you can count on me”
Chemical Properties of Mercury: ”I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”
Answer:
Some of the physical and chemical properties of magnesium are:
-The term ‘magnesium’ is derived from the Greek word magnesia, which refers to the name of the place from where it was extracted.
-Magnesium is closely related to manganese and magnetite.
-About 2.1% of the Earth’s crust contains magnesium. This makes magnesium the 6th most found element.
-The biggest deposits of magnesium is found in the seawater. It has been calculated by scientists that a cubic mile of seawater contains about 6 million tons of this element
2nd answer:
Physical Properties of Magnesium: ”I’m a highly stable element, so you can count on me”
Chemical Properties of Magnesium: ”I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon
Explanation:
Hope this helps you out! UwU
Calculate the molarity of 0.207 grams of Ca(OH)2 in an aqueous solution with a total volume of 40.0 mL
Answer:
40.0 mL. (4 marks)...
Explanation:
Does changing the number of protons change the identity of the element you have built ?
Answer: Yes.
Explanation:
the number of protons in the nucleus determines an element's identity. Chemical changes do not affect the nucleus, so chemical changes cannot change one type of atom into another. The number of protons in a nucleus does change sometimes, however. The identity of the atom, therefore, changes.
5. What causes a moving object to change direction?
A. Acceleration
B. Velocity
C. Inertia
D. Force
Answer:
D. Force
Explanation:
Applied force can cause change in direction
A force applied at an angle to the direction of motion of an object can cause it to change direction. It is possible that the object keeps going at the same speed, if the force is applied perpendicular to the direction of motion. But the velocity of the the object changes.
PLEASE HURRY WILL GIVE BRAINLIEST
Click Oil Basics and use the information to complete this passage that discusses how plastic production affects society.
The production of plastics makes life
{answer} , so it benefits society. On the other hand, the production of plastics causes air and water {answer} , so it also harms society.
Answer:
easier and pollution
Explanation:
I just had this question and got it right
Which of the following is considered a sign of a chemical change?
This part of the plant cell turns sunlight into food. It is called a
cell wall
chloroplast cell membrane
cytoplasm
Answer:
Chloroplast
GOOD LUCK!!!
Answer:
b
Explanation:
How to use system and habitable in a sentence
Answer:
The farthest habitable spot to the south The whole distribution system broke down.
Explanation:
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Which experimental setup would let a student investigate the connection between kinetic energy and temperature? (1 point) placing one drop of food coloring in a cup with 60 ml of water at 10",placing one drop of od coloring in a second oup with 60 mL of water at 40°C placing one drop of food coloring in a cup with 50 ml of water at 10" placing one drop of food coloring in a second cup with 100 ml of water al 10" placing one drop of food coloring in a cup with some of water al 10 placing two drops of food coloring in a second cup with 100 ml of water an 100 placing one drop of food coloring in a cup with some of water at 100 placing two drops of food coloring in a second cup with 50 ml of water at To ONO type here to search
Answer:
The correct option is;
Placing one drop of food coloring in a cup with 60 ml of water at 10°, placing one drop of food coloring in a second cup with 60 ml of water at 40°C
Explanation:
The experimental setup that would allow the student investigate the connection between kinetic energy and temperature should be made up of the following characteristics
1) The constant terms for the experiment should be defined, which in this case are
a) The volume of the water which is 60 ml in both subjects of the experiment
2) The definition of the variable that produces the effect that is being monitored, which is the use of the different temperatures in the two experimental subjects
3)The environmental limits of the experiment, which is the water and the food coloring used
Answer:
b/2
Explanation:
What element would have this electron configuration:
1s22s22p5
In which ocean zone would photosynthetic organisms be found?
Answer:
Photic Zone
Explanation:
The photic zone is the uppermost layer of the sea that recieves sunlight allowing phytoplankton to perform photosynthesis.
Plz help! The best answer will be marked as brainliest!
Make a funny sentence for the beneficial or great uses of magnesium
I DON¨T WANT A MEME!
Here is an example for Mercury, it HAS to for Magnesium
¨I have a long history of use in fluorescent lighting so I can light up any room ¨
Answer:
"Like when people say like im a party fowl but I'm like OMg, I'm like the reason everyone loves the 4th of July like I am 4th of July.
Explanation:
As magnesium ignites easily in air and burns with a bright light, it's used in flares, fireworks and sparklers. I imagine Magnesium talks like a valley girl lol.
Which data are shown on topographic maps?
A.)population sizes of major cities
B.)information about elevation and slope
C.)relief of each area laid out in tiled squares
D.)variations in climate between geographic areas
Answer:
B
Explanation:
Answer:
information about elevation and slope
Explanation:
.
PLEASE HELP!!
A model stands on a scale and finds her weight to be 105 pounds. If
the pressure exerted by her feet on the scale is 2.16 pounds per
square inch, what is the area of her feet in cubic centimeters?
__cm2
Answer:
313.5cm²
Explanation:
Given parameters:
Weight of model = 105pounds
Pressure applied on the scale by model = 2.16pounds per square inch
Unknown:
Area of her feet in cm² = ?
Solution:
Pressure is the force per unit area;
Pressure = [tex]\frac{Force}{Area}[/tex]
Input the parameters and solve;
2.16 = [tex]\frac{105}{Area}[/tex]
105 = 2.16 x Area
Area = [tex]\frac{105}{2.16}[/tex] = 48.6in²
We need now to convert the in² to cm²
1in² = 6.45cm²
48.6in² = 48.6 x 6.45 = 313.5cm²
answer question in picture please.
Answer:
b
Explanation:
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Answer: the answer is B. C
Explanation:
An atom has a mass number of 43 and an
atomic number of 23. How many protons
does it have?
Answer:
23
Explanation:
Which of the following has the smallest atomic radius?
A. Astatine
B. Bromine
C. Fluorine
D. Iodine
Answer:fluorine
Explanation:
In 1973, the insecticide called DDT wasbanned in the United States due to concerns that itwas toxic to fish and that it may have affected birds.There is little scientific evidence that DDT is directlyharmful to humans. How could banning DDT be beneficial to human health
Answer:
See explanation
Explanation:
DDT is dichlorodipphenylrtrichloroethane. It is was a popular insecticide used for agricultural purposes. Racheal Carson's book, silent springs drew attention to the use of insecticides such as DDT in agriculture.
DDT is a non-biodegradable, fat-soluble compound. It enters into the food chain and has the ability to bioaccumulate in the human body where it becomes deposited in the adipose tissue.
There is no direct harmful effect of DDT to humans, however, when oxidation of DDT takes place in body many harmful metabolites are released into the body causing harmful effects to human health such as; breast cancer, male infertility, miscarriages and low birth weight, developmental delay and liver damage.
There is convincing empirical evidence supporting the carcinogenicity of DDT its main metabolites DDE and DDD, however, many studies on the harm caused by DDT and its main metabolites in the body have so far led to inconclusive, and sometimes negative, results
Calculating Density Warm Up
What is the density (g/cm3) of 48.0 g of a metal if the
level of water in a graduated cylinder rises from 25.0
mL to 33.0 mL after the metal is added?
1) 0.17 g/cm3
2) 6.0 g/cm3
3) 380 g/cm3
33.0 mL
25.0 mL
object
Calculating Density Warm Up
Answer:
2
Explanation:
33-25=8
48/8=6
The density (g/cm3) of 48.0 g of a metal if the level of water in a graduated cylinder rises from 25.0 mL to 33.0 mL after the metal is added density will be 6.0 g/cm3. option B is correct.
What is density?
The density of any substance is the division of the mass of the given substance to the volume of the given substance and its unit is centimeter cube.
where,
density = mass of substance / volume of the substance
mass of substance = 48.0 g
volume of substance = 33.0 - 25.0 = 8 ml
substituting the value in the formula,
density = 48.0 / 8 = 6 cm³
Therefore, density (g/cm3) of 48.0 g of a metal if the level of water in a graduated cylinder rises from 25.0 mL to 33.0 mL after the metal is added density will be 6.0 g/cm3. option B is correct.
Learn more about density, here:
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I need help pls brainless if right
Answer: C
Jane Goodall observed the chimpanzees. She noted the chimpanzees, and she studied their bodies closely. This is an example of investigation.
Hope this helps you!
In fermentation, what do cells use instead of oxygen to break down glucose?
Answer:
sugar
Explanation:
In the absence of oxygen, the cell uses a process called anaerobic fermentation. or simply fermentation. Fermentation doesn't break the sugar down any further, it simply helps reset the system so that more sugar can be broken down.
Thus the above response is right.
Learn more about fermentation here:
https://brainly.com/question/16516092
Iron, a metal, has which of the following features?
electrons that transfer between atoms to make cations and anions
a sea of electrons
firmly bonded electrons
electrons shared between single pairs of atoms
Answer: A sea of electrons
Explanation:
What is a model and why do scientist use them?
Answer: In science, a model is a representation of an idea, an object or even a process or a system that is used to describe and explain phenomena that cannot be experienced directly. Models are central to what scientists do, both in their research as well as when communicating their explanations.
(hope this helps you ^^)
PLZ HELPPPPP ASAPPPPP
Answer: all of the above
Explanation: All the choices listed above can be used to describe liquid
A 0.2027 gram sample of finely powdered limestone (mainly CaCO₃) was dissolved in 50 mL of 0.1035 M HCl. The solution was heated to expel CO₂ produced by the reaction. The remaining HCl was then titrated with 0.1018M of NaOH and it required 16.62 mL. Calculate the percentage of CaCO₃ in the limestone sample? CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
Answer:
Explanation:
CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
100 gm + 2000 mL of M HCl
Amount of HCl remaining = .1018 M of 16.62 mL
= .1018 x 16.62 mL of M HCl
= 1.69 mL of M HCl
Initial HCl taken = 50 mL of .1035 M HCl
= 5.175 mL of M HCl
HCl reacted = 5.175 - 1.69 mL of M HCl
= 3.485 mL of M HCl
2000 mL of M HCl reacts with 100 gm of CaCO₃
3.485 mL of M HCl will react with .174 grams of CaCO₃
percentage of calcium carbonate = .174 x 100 / .2027
= 85.84 %
3. Two boxes need to be moved. Box A is 10 kg. Box B is 3 kg. Which box will 1 point
require more force to move?
BOXA
BOX
Answer:
box A
Explanation:
10 is bigger than 3 since 10 is bigger it has more force in it
Which types of reactions would result in a color change?
Answer:
reversible redox reaction
Explanation:
