Answer:
maybe something about planets or the solar system and they have to make them
Explanation:
Answer:
create a rainbow of flames or build an infinty mirror
Explanation:
Dashawn has to find the volume of his phone for science
class. He uses a ruler to measure its length, width, and
height and finds the following:
| = 17 cm
w = 7.5 cm
h = 0.8 cm
What is the volume of Dashawn's phone?
Answer: Volume of rectangle = L * W * H
Explanation: Multiply the 3 numbers together
Answer:
volume = L x W x H
V= 17 x 7.5 x 0.8
V = 102 cm^3
Explanation: Multiply the three number.
To find the volume, you multiply length times width times heigh
Which statement best describe what happens during a chemical change
Answer:
both the identity and the properties of a substance change.
Answer:
its A both the identity and the properties of a substance change
Explanation:
got it right on edge
Which element has 5 protons 5 neutrons and 5 electrons
Elements are the smallest unit of the atom and cannot be divided. An element having 5 electrons, protons, and neutrons is a boron.
What are subatomic particles?Subatomic particles are the constituents of atoms that have mass and charge. They are the components that make the element unique and give the atomic number and the mass.
The electron is a negatively charged particle and protons are positive particles that along with neutral neutron give the atomic mass. An element with 5 sub atomic particles is called a boron.
Therefore, the element is boron.
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Summary about helium
Answer: Helium is an type of air that can be used to inflate balloons, balls, and other things that require air. The carbon dioxide we breath out is similar to this helium.
Hope this helps!
A number in front of a chemical formula
Group of answer choices
subscript
coefficient
Answer:
the answer is coefficient
Answer:
Coefficient is your answer
HOPE THIS HELPED YOU
PLEASE MARK AS THE BRAINLIEST (ㆁωㆁ)
When bonding, what is most likely to happen between the atoms listed below?
A.) Atom X will donate electrons to Atom Y
B.) Atom X will accept electrons from Atom Y
C.) Atom Y will accept electrons from Atom Z
D.) Atom Z will donate electrons to Atom X
Answer:
atom x will accept electrons from atom y
Explanation:
in bonding the main purpose is to gain stable electronic configuration hence atom y will give out the two valence electrons to atom x
this kind of bonding where one of the atom is the one donating the electrons is known as ionic bond.
A chemical equation is balanced if there are ______ ______ of each kind of ______________________ on both sides of the equation.
If each side of the equation has the same number of atoms of a given element, that element is balanced. If all elements are balanced, the equation is balanced. So your sentence should look like this:
A chemical equation is balanced if there are equal atoms of each kind of element on both sides of the equation.
How is a scientific theory different from everyday theories proposed by random individuals?
A.
Everyday theories can be proven beyond doubt.
B.
Everyday theories are based on facts, not opinions.
C.
Scientific theories must be supported by evidence or data.
D.
Scientific theories are not different from everyday theories.
Scientists in a lab are working with two different samples of the element mercury. They know that the different samples are different isotopes.
Which property of the isotopes must be different?
a. the atomic number
b. the electric charge
c. the element name
d. the mass number
Answer:
A Mass number
Explanation:
did it on edge2020
What is the term for a ratio of equivalent measurements that can be used to change a value from one unit to another
Answer:conversion factor
Explanation:
How many elements are in this chemical formula?
HCl
Group of answer choices
The first ionization energy of fluorine and iodine
Answer:
The most electronegative atom, fluorine, is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7. First Ionization Energy of Iodine First Ionization Energy of Iodine is 10.4513 eV.
Explanation:
_____ means to make the body well again
Answers;
A. Body Repair
B. Energy
C. Growth
D. Motion. (Which One is it??)
Answer:
I'm pretty sure it's body repair But it also maybe energy
Explanation:
Answer: A.
Explanation:
the science or study of how man and animals perform tasks and solve certain types of problems involving use of the body.
Hope this helps!....(bruh this was tuff)
How does sediment form?
Molten rock cools below Earth’s surface.
Chemical changes cause sediment to cement together.
Loose material is compacted by pressure.
Weathering breaks down rock and other material.
i will give brainlest also if this get answer becuase i said this no one should have to say that but i will
Answer:
Loose Material is compacted by pressure.
Which of these is a compound?
carbon dioxide
potassium
salt water
salad
write down the similarities and differences of Continental and temperature climatic zones
Answer:
Temperate climates, otherwise known as meso-thermal climates, are cooler than subtropical climates, but warmer than polar climates. A continental moderate climate is another sub-type of temperate climates. These regions have hot, rainy summers and cold, dry winters.
Explanation:
Wear lightweight clothes in the_____. not sun or summer and is it heat
Answer:
there was too much heat
Explanation:
What will an object do if its density is less than the density of water?
Sink
Float
Bob up and down
Move forward
Answer:
bob up and down
Explanation:
i think it is the answer i am not sure
If you go to the moon your mass would ___.
stay the same
increase
Answer:
stay the same
Explanation:
you would weigh less if u stood on a scale but you're still the same mass unless you chopped of a body part or something
Calculate the mass percent of sulfuric acid in a solid sample given a 0.8390g sample of that solid required 32.22 mL of 0.2012 M NaOH for neutralization.
A) 62.11
B) 2.64
C) 37.89
D) 75.78
E) 1.27
Please give an answer and an explanation, thanks!
Answer
C
Explanation:
i remember learning this
Mass percentage does not have any unit as numerator and denominator contains the same unit. The percentage of sulfuric acid in solid sample is 38.07%.
What is percentage by mass?Mass percentage represents the the percentage of each element that is making a particular compound.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
[tex]\rm 2 NaOH aq + H _{2} SO _{4} aq → Na _{2}SO _{4}aq + 2 H _{2} O[/tex]
Volume of NaOH solution = 32.22 mL = 0.03222 L
Concentration or molarity of the NaOH solution = 0.2012 M
Moles of NaOH : 0.03222×0.2012=0.006444mol
2 moles of sodium hydroxide reacts with 1 mole of sulfuric acid.
0.006444mol of sodium hydroxide reacts with =0.006444÷2=0.003222mol of sulfuric acid.
Mass of sulfuric acid neutralized = 0.003222 moles × 98.08 g/mol =0.31601376g
Percentage of sulfuric acid in solid sample= (0.31601376g÷0.8390g)×100=38.07%
Thus the percentage of sulfuric acid in solid sample is 38.07%.
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CaCO3
How many atoms of oxygen are in one
molecule of calcium carbonate?
A 1
B3
C5
D6
Answer:
B. three atoms of oxygen
1 mole of a gas occupies 22.4 L at ________
Answer: At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L (Figure below). A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atm).
Explanation:
That the answer
1 mole of a gas occupies 22.4 L at (0°C and 1 atm). It is the standard temperature and pressure.
What is Avogadro's hypothesis?Avogadro's hypothesis says that all gases have an equal number of particles at the same temperature and pressure.
The empty space between the particles makes up the majority of a gas's overall volume.
Due to this, the size of the particles themselves is nearly insignificant.
The volume of one mole of a gas at standard temperature and pressure is known as the molar volume.
Thus, the correct option is 0°C and 1 atm.
Learn more about Avogadro's hypothesis
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Similarities and Differences in the order in which electrons are filled in s and d subshells.
Answer: Each orbital is found on different areas of the periodic table. The s sublevels are found on the first(left) and last(right) columns of the period table which hold a maximum of two electrons since it only has one orbital. First, each orbital can hold a maximum of two electrons. The other three sublevels: p, d, and f respectively have more orbitals, which is why they can hold more electrons. These sublevels of orbitals stand for sharp(s), principle(p), diffuse(d), and fundamental(f) (these are simply the categories of orbitals).
p has 3 orbitals so it can hold 6 electrons max. d has 5 orbitals so it can hold 10 electrons max. f has 7 orbitals so It can hold 14 electrons max.
Here is a picture of these orbital groups so you can understand a little better:
If a 20-N net force makes an object accelerate at 10 m/s^2, what is the mass of the object?
Answer:
The answer is 2 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
a is the acceleration
f is the force
From the question we have
[tex]m = \frac{20}{10} \\ [/tex]
We have the final answer as
2 kgHope this helps you
EXPLANATION OF THE MESOSPHERE ASAP PLSSS
A man weight 235.0 Ib Express his weight in kg.
How do you find it?
Answer:
The answer is 106.59 and 1 lb = 0.45359237 kg.
Explanation:
What are the names of the two categories of living organisms?
Answer:
Prokaryotes (which are bacteria and archea)
Eukaryotes (which is plants, animals, protists and fungii)
See the reference image for the chemical equation for the reaction you just observed. What do you think each side of the equation represents? What do the symbols in the equation represent? Be prepared to share your thoughts with a partner.
HELP QUICK
Answer:
Detail is given below.
Explanation:
Chemical equation:
4NH₃ + 3O₂ → 2N₂ + 6H₂O
This reaction shows that when ammonia react with oxygen it form water and nitrogen gas.
There are two reactants on left hand side oxygen and ammonia. Ammonia is formed when nitrogen and hydrogen react. While on right hand side there are two products nitrogen and water. Water is formed by the reaction of hydrogen and oxygen.
The given reaction also shows that it follow the law of conservation of mass.
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
Please help will give brownies
Answer:
1.A 2.B
Explanation:
your welcomme glade to help
I need help pls help ASAP I'll give brainliest
Answer: A
Explanation:
Answer:
The answer is A
Explanation: