Answer:
Elements..............
How can a chemical reaction be sped up?
Select from the drop-down menu to correctly complete the statement.
Add a ___ that is unaffected by a reaction.
A:Catalyst
B:Coefficient
C:Product
Answer:
A.Catalyst
Explanation:
the correct answer is A
In a lab, students collected 64g of SO2 and 46g of sodium. What was the original amount of Na2SO4 present?
Answer:
127889
i think
Explanation:
which two types of particles are present in equal numbers in an atom
Answer:
An atom contains equal numbers of protons and electrons .
11. Start level 3 of the balancing equation game. Take turns and write down the equations as you solve them, along with any new strategies you needed for balancing.
CHALLENGE QUESTIONS: BALANCE THE EQUATIONS BELOW.
A. ___ NaNO3 + ___ PbO ___ Pb(NO3)2 + ___ Na2O
B. ___ Ca3P2 + ___ H2O ___Ca(OH)2 + ___ PH3
C. ___Fe2O3 + ___ CO ___Fe + ___ CO2
D. ___NH3 + ___ O2 ___ NO2 + ___ H2O
E. ___FeS + ___O2 ___Fe2O3 + ___SO2
F. ___ C3H6O2 + ___ O2 ___ CO2 + ___ H2O
In balancing reaction equations, The number of atoms of each element on both sides of the reaction equation must be the same.
The major rule that guides the balancing of chemical reaction equations is that the total number of atoms of each element on the right hand side of reaction equation is equal to the total number of atoms of the same element on the left hand side of the reaction equation. For each of the equations shown;
2NaNO3 + PbO -------> Pb(NO3)2 + Na2OCa3P2 + 6H2O→ 3Ca(OH)2 + 2PH3Fe2O3 + 3CO ------> 2Fe + 3CO24NH3 + 7O2 ------> 4NO2 + 6H2O4FeS + 7O2 -----> 2Fe2O3 + 4SO22C3H6O2 + 7O2 -----> 6CO2 +6H2OLearn more: https://brainly.com/question/8646601
what is the stage that all stars in our galaxy go through
Answer:
Heavy stars turn into supernovae, neutron stars and black holes whereas average stars like the sun end life as a white dwarf surrounded by a disappearing planetary nebula. All stars, however, follow roughly the same basic seven-stage life cycle, starting as a gas cloud and ending as a star remnant.
Analyze how humans use technology to store (potential) and/or use (kinetic) energy.*
Science btw
Human devices use potential energy to store energy, whereas kinetic energy is potential energy in motion. Both types of energies can be measured in Joules (J).
Human devices generate and use different sources of energy, which can be classified into renewable sources (e.g., solar, hydraulic, winds, etc) and non-renewable sources (e.g., nuclear energy) of energy.
For example, a hydroelectric power plant transforms the potential energy stored in water reservoirs (e.g., a lake) into mechanical energy (a type of kinetic energy) when this energy is released from the water reservoir and flows through a turbine.
Subsequently, this type of kinetic energy is then used to generate electricity.
On the other hand, a nuclear power plant uses the potential energy that is stored within the nuclei of atoms to produce kinetic energy by a process known as nuclear fission.
This process (nuclear fission) releases energy in the form of heat (i.e., thermal energy).
Subsequently, this type of kinetic energy (heat) is used to generate steam, which then moves turbines to generate mechanical energy and finally generates electricity.
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What is the charge of a neutron?
it changes
positive
no charge (neutral)
negative
Why are compounds, such as NaCl, more stable than the elements that make them up?
Answer:
Explanation:
Why are compounds, such as NaCl, more stable than the elements that make them up?
the driving force for chemical reaction is that elements and compounds wil react until they produce more stable matter,
Na metal and Cl2 are very reactive. When they react with each other they become more stable as the Na+ and Cl− ions
What is the difference between brown sugar and granulated sugar?
potassium, k, has 19 protons, 20 neutrons, and 19 electrons. what is the charge of the atom’s nucleus?
from the 19 protons
Answer:
+19
Explanation:
potassium, k, has 19 protons, 20 neutrons, and 19 electrons. what is the charge of the atom’s nucleus?
since only neutrons and protons are in the nucleus, the overall charge in the nucleus is +19 from the 19 protons
Are these different elements? Think about what helps you to locate an element on the Periodic Table.
Atom A: 14 protons; 12 electrons; 15 neutrons
Atom B: 12 protons; 14 electrons; 13 neutrons
Can someone help me on this
Answer:
V = volume, usually in Litres
n = number of moles, in mol
R = the gas constant, which should be 8.33 J*K /mol
T = is the temperature, but in kelvin (if its in Celcius, you convert it)
What would happen if
you tried to cut a sheet
of aluminum foil in half
over and over again?
Answer:
it's properties would remain untouched though it's Changing physically
anyone wanna play animal crossing with me?
Answer:
Play what exactly???????
4. The octet rule is a rule that governs bond formation. It states that -
a. elements can only gain 8 electrons
b. all elements lose 8 electrons
c.all elements will gain, lose or share electrons in order to obtain 8
electrons in their outer energy level
d. all elements share 8 electrons
How you can minimize human impact on the environment?
Which statements best describe displacement? Check all that apply.
1.Displacement is measured along the path an object travels.
2.Displacement is a measurement that includes direction.
3.Displacement is the difference between a starting point and an ending point.
4.Displacement is how far an object travels from starting point to ending point.
5.Displacement is measured as a straight line between a starting point and an ending point.
Answer: The answer is B, C, and E.
Explanation:
Pls, mark me brainliest.
Displacement can be defined as the difference between a starting point and an ending point. Displacement is a measurement that includes direction and is measured as a straight line between a starting point and an ending point. Therefore, option (2), (3), and (5) are correct.
What is displacement?The displacement of an object can be described as the change in the position of an object. The displacement is the minimum length between the initial and the final point.
The displacement is the vector quantity posses both distance and magnitude. Therefore, the measurement of the displacement includes direction.
Displacement can also be described as the difference between a starting point and an ending point. Displacement can be measured as a straight line between a starting point and an ending point.
The S.I. unit of the displacement is the same as the distance i.e. meters and the C.G.S. unit are centimeters.
Learn more about displacement, here:
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#SPJ2
how is the periodic law demonstrated within the groups of the periodic table
Answer:
# of electron shells
Explanation:
Elements in the same periodic group have the same number of electron shells.
help asap for brainlist
How will you convert 3.45 Kilometers to meter. Choose from the following options.
Question options:
Move the decimal in 3.45 TWO places to the right to increase the value.
Move the decimal in 3.45 TWO places to the left to decrease the value.
Move the decimal in 3.45 THREE places to the right to increase the value.
Move the decimal in 3.45 TWO places to the right to decrease the value.
Answer:
Move the decimal in 3.45 THREE places to the right to increase the value.
Explanation:
3.45km = 3450m (multiply by 1000)
Answer:
3rd option is the correct answer
Hope this helps!
The most commonly used commercial method to extract delta-9-tetrahydrocannabinol (THC) from the cannabis plant material is by:
Answer:
using liquid carbon dioxide to produce oils or other forms.
Explanation:
If you wanted to find a type of atom in your little finger that has been in its present form (been the same element) since the beginning of the universe, which element should you look for
An atom that has been present in the little finger and has been in its present form since the beginning of the universe is the element calcium.
The human body, just like every other thing in the universe is composed of atoms. An atom is the smallest particle of a substance that can take part in a chemical reaction.
An atom that has been present in the little finger and has been in its present form since the beginning of the universe is the element calcium. Calcium is found in abundance in human extremities.
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3.01 x 1023 atoms Na
Answer:
3,079.23
Explanation:
I need help please! Describe how distillation works using the terms boiling and condensation?
Answer:
it boils a liquid to create condomsation
Explanation:
Answer:
Distillation refers to the selective boiling and subsequent condensation of a component in a liquid mixture. It is a separation technique that can be used to either increase the concentration of a particular component in the mixture or to obtain (almost) pure components from the mixture. The process of distillation exploits the difference in the boiling points of the components in the liquid mixture by forcing one of them into a gaseous state.
Explanation:
Asap help for Brainlist
Answer:
2nd option
Hope this helps!
Which choice accurately describes what light is?
Answer:
If I think this is the same question then the answer is "scientists still debate this"
Explanation: First of all I just took the test. and second light can be both a particle and a wave because of quantum mechanics, I believe einstein came up with the idea.
Make a list of some other common mixtures. Stating what they are mixtures of.
lemon juice
fry rice
biryani
lassi
slime etc
Number of
Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
А
7
B.
15
с
D
E
26
56
F.
Using the periodic table, complete the table to describe each atom. Type in your answers.
A
B
с
N
D
which groups of the modern periodic table contain elements that are classified as metalloids
Answer:group 4 and 5
Explanation: it is because they are the smallest class of elements containing only 6 elements
If you dissolve 0.1 mol of formic acid in 1 L of water, ther esulting solution contains 0.004 mol of H₃O+. Based on this information, is formic acid a strong acid, or is it a weak acid?
Answer: Consider the equilibrium of the generalized acid, HX , in aqueous solution….
HX(aq)+H2O(l)⇌H3O++X−
As we FACE the page, the given reaction, with FORMIC acid, HC(=O)OH , produces ONLY millimolar concentration with respect to hydronium ion, and acetate ion … and thus, as anticipated, formic acid is a WEAK acid…. pKa=3.79 .
i.e. Ka=(0.004∙mol∙L−1)20.10∙mol∙L−1−0.004∙mol∙L−1=1.60×10−4
pKa=−log10(1.60×10−4)=−(−3.79)=+3.79
….formic acid is nevertheless a STRONGER acid than acetic acid, for which pKa=+4.76 .
Explanation:
Asap help for Brainlist
Answer:
d
Since there are 6 electrons and it's neutral, that means there are also 6 protons to balance it out. They said there's 6 neutrons. The atomic mass is the total of protons and neutrons so 6+6=12
