ANSWER:
I think its B.
Which event always involves a chemical change A boiling B melting C conducting D burning
Answer:
burning
Explanation:
When a chemical change occurs, the matter is transformed into a new substance. When a substance is burned, it will change into something new. Thus, you know that burning is a chemical change. All the other options are physical properties. The substances may change state, but they will not change identities.
- I took the quiz and got 100%
Hope this helps!
- 1. Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he is going to create an experiment to find out if there is something better. What is his dependent variable? - A. Justin - B. Amount of snot the tissue can hold - C. Amount of tissue - D. Type of tissue
Answer:
B. Amount of snot the tissue can hold
Explanation:
In this specific scenario, the dependent variable would be the amount of snot the tissue can hold. That is because this is what Justin is trying to measure, which is also dependent on the type of tissue which would be the independent variable in this scenario. The different types of tissues can absorb different amounts of snot and this is what Justin ultimately wants to determine.
Explain how a mutation becomes an adaptation.
Answer:
An adaptation occurs if a mutation helps an individual survive and reproduce.
Explanation:
Over generations, the mutation will become more common. An adaptation occurs if a mutation isn't passed on to offspring. Hope this helps! xx
please, please, please help! this assignment is due in a few mins and idk what to do. I will mark the first/best answer brainliest! Why do substances exist as a solid, a liquid, or a gas?
Answer:
Explanation:
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid
What is the mass number of beryllium
Answer:
9.012182 u
Explanation:
If the density of a gold coin is 19.3g/cm3, what would be the density of the coin if you cut it in half?
The nucleus contains protons and neutrons true or false?
Answer:
the answer is
it's true
Answer:
true
Explanation:
it has both neutrons (neutral) and protons (positive)
HURRY I WILL GIVE BRAINLIEST Which would be a common-sense practice in a lab environment? keeping quiet about accidents washing hands before the lab taking a water bottle to drink scratching one’s face during the lab
Answer:
washing your hands before the lab
Questions
1 Describe two ways in which sodium chloride is different from sodium
frorent from chlorine
chlorine
The compound composed of these ions exhibits properties entirely different from the properties of the elements sodium and chlorine. Chlorine is poisonous, but sodium chloride is essential to life; sodium atoms react vigorously with water, but sodium chloride simply dissolves in water.
*
Which of the following is classified as an element?
a. H20
b. Carbon
c. all of the above
d. Tea
Answer:
c is the answer because everything is an element
which of the following substances does not conduct electricity
a)brass b)copper c)carbone(graphite) d)carbon(diamond)
Answer:
diamonds
Explanation:
Diamond does not conduct electricity.
• A form of carbon in which each of the atom of carbon is joined to four other atoms of carbon, giving rise to a giant covalent composition is a diamond.
• Due to this, diamond is very robust and exhibits high melting point. Thus, is used to cut tools.
• Diamond does not conduct electricity, due to the absence of delocalized electrons in the structure.
Thus, diamond does not conduct electricity. Option d is correct.
To know more about:
https://brainly.com/question/2042843
The density of plutonium is 19.84 g/cm². What is its mass if the container has
volume of 250 cm?
Answer:
the answer is 7.936X 10⁻⁷kg.... the unit for volume must be cm³
Explanation:
we know,
ρ =m/v
given,
ρ =19.84/1000X(100)²= 1.984X10⁻⁶kg/m²
V (volume of the container means the volume of the element)=2.5 m³
NOW putting in the equation
1.984X10⁻⁶/2.5=m
or, m=7.936X 10⁻⁷kg(ANS)
thank u(i am not 100% sure but think it shoud be the answer)
Is cobalt 60 more dangerous than bananas ( potassium 40) and why ?
Answer:
To the best of my knowledge, it is because of the amount of gamma rays is given off.
Explanation:
While both are isotopes, Potassium 40 gives off fewer gamma rays compared to Cobalt 60. Potassium 40 isn't really harmful to humans, but Cobalt 60 (I believe) is used in chemotherapy.
SER
In which direction does the Sun appear to move across the sky?
from west to east
O from east to west
O from north to south
from south to north
Answer:
east to west is the answer
The power to conduct elections is what type of power
Answer:
Unlike delegated powers, they are not listed specifically, but are guaranteed by the Tenth Amendment: "The powers not delegated to the United States by the Constitution, not prohibited by it to the States, are reserved to the States respectively, or to the people." Some traditional reserved powers include regulating ...
Explanation:
standard units of measure for density
Answer:
g/cm³ for solids,
g/ml for liquids
g/L for gases.
Explanation:
Though SI unit of density is kg/m³, for convenience we use g/cm³ for solids, g/ml for liquids and g/L for gases. Mathematically, density is defined as mass divided by volume: ρ=m/V
Describe to me the difference on an
atomic/particle level between a Solid and a Gas.
Atoms contain positive, negative, and neutral. what happens when two positively charged particles are close together?
A.They repel each other
B.They cancel each other
C.They attract each other
D.They have no effect
Answer:
they repel each other
Explanation:
A is the ans
2) A wooden block has a volume of 176 cm3 and a density of 18.2 g/ cm3. What is the mass?
Answer:
3,203.2 g
Explanation:
density multiplied by volume gives you the mass, and both cm3 cancel eachother out so you are left with just g.
Can someone help me with science
Answer:
yess...
follow me and mark me brainliest
Answer:
Yess
Explanation:
Ask your question please.
Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction?(1 point)
A) 20
B) 15
C) 10
D) 30
Answer:
D 30
Explanation:
whenever there is a reaction, the amount of atoms don't change, because matter can't be created or destroyed. Add the carbon and oxygen atoms together
According to the Law of Conservation of Matter, there will be 30 atoms of product in the reaction.
LAW OF CONSERVATION OF MATTER:
The law of conservation of matter states that matter can neither be created nor produced in a chemical reaction. This further means that the amount of matter in the reactant of a reaction must equate that of the products. Hence, if 10 atoms of carbon (C) react with 20 atoms of oxygen (O), there will be 10 + 20 = 30 atoms of product in this reaction. Therefore, According to the Law of Conservation of Matter, there will be 30 atoms of product in the reaction.Learn more: https://brainly.com/question/24996173?referrer=searchResults
Why do some objects that collide have different effects from the equal force that occur due to the collision ?
Answer:
In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction.
what are 5 physical changes in matter
Answer:
cutting, bending, dissolving, freezing, and boiling
Explanation:
A physical change is a change in one or more physical properties of matter without any change in chemical properties. In other words, matter doesn't change into a different substance in a physical change. Examples of physical change include but are not limited to, from solid to liquid or from liquid to gas are also physical changes.
What is the formula for potassium nitrate?
The anther of flower contains
Answer:
here is your answer please mark me as brainlist
Explanation:
Answer # Stamen: The pollen producing part of a flower, usually with a slender filament supporting the anther. Anther: The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma.
What is the Thermal Energy?
Answer:
Thermal Energy is a certain type of energy that Heats.
Explanation:
"Thermal" is derived from "Thermo" which means heat.
Which of the following is an element? aluminum bronze table salt brass
Answer:
Aluminum is an element
Explanation:
Aluminum is the most abundant metal in the earths crust with an atomic number of 13.
What is the volume of as sample that has a mass of 40.0 g and a density of 4.30 g/mL?
Explanation:
density = mass/volume so volume = mass/density = 40/4.30
Which property refers to how a mineral reflects light?
Luster is how the surface of a mineral reflects light. It is not the same thing as color, so it crucial to distinguish luster from color. For example, a mineral described as “shiny yellow” is being described in terms of luster (“shiny”) and color (“yellow”), which are two different physical properties.
Answer:
It is definitly Luster
Explanation:
How shiny something is or how its acts in the sun
POSSIBLE POINTS: 33.33
What is the name of the binary molecule H202? This compound is also known as hydrogen peroxide and is a popular disinfectant for cuts or
scrapes
Dihydrogen monoxide
O Hydrogen dioxide
Dihydrogen Dioxide
None of this makes any sense
Answer:
Dihydrogen Dioxide
The name of binary molecule H₂O₂ is also known as hydrogen peroxide and is a popular disinfectant for cuts or scrapes is dihydrogen dioxide. The correct option is A.
What is dihydrogen dioxide?Dihydrogen dioxide is the substance of water with extra oxygen molecules. In the dihydrogen monoxide parody, water is referred to by a strange scientific term, most frequently "dihydrogen monoxide,". It is a poisonous gas, and it is leading to the death of many people in America. It is known as DHMO.
Some of its characteristics are listed in an especially ominous manner, such as speeding up corrosion and inducing asphyxia. This substance, commonly referred to as hydrogen peroxide, is used frequently as a disinfectant for cuts and scrapes.
Thus, the correct option is A. Dihydrogen dioxide.
To learn more about dihydrogen dioxide, refer to the below link:
https://brainly.com/question/14537002
#SPJ6