Answer:
Explanation:
Because the experiment has an different independent and dependent variable and each part has a different result of what type of copper or what type of control you are using for you experiment.
PLS MARK BRAINLIEST IF CORRECT I WORKED HARD ON THIS ANSWER,HAVE A NICE DAY/NIGHT <3
Answer:
Because the experiment has a different independent and dependent variable and each part has a different result of what type of copper or what type of control you are using for your experiment.
The data table shows the number of pumpkin seeds that
germinate at different temperatures.
Effect of Temperature on Germination of Pumpkin Seeds
Temperature
Seeds germinated
Trial 1 Trial 2 Trial 3 Tral 4
60 63 70 62
75 87 82 78
20°C
24°C
28°C
86
84
84
32°C
69
64
63
66
What is the mode of the data at 28°C?
O A. 84.25
OB. 84
O C. 83.5
O D. 85
Answer:
Its B
Explanation:
pls help
Beryllium has a specific heat of 1.825 J/(g . °C). How many joules of heat energy are required to raise the temperature of 2.300 grams of beryllium from 22.00 to 60.00°C?
Heat required to raise the temperature = 159.505 J
Further explanationGiven
c = specific heat of Beryllium = 1.825 J/g C
m = mass = 2.3 g
Δt = Temperature difference : 60 - 22 = 38 °C
Required
Heat required
Solution
Heat can be formulated
Q = m.c.Δt
Input the value :
Q = 2.3 x 1.825 x 38
Q = 159.505 J
Lithium has two stable isotopes, lithium-6 and lithium-7. The atomic number of lithium is 3. Explain how the two are the same and how they are different.
Explanation:
The two isotopes of lithium given are similar in the sense that they have the same atomic number which is 3.
Every kind of an atom of an element have the same atomic number. Atomic number is the number of protons in an atom.
The atoms are different in that they have different mass number because the number of protons they contain are different.
So for isotopes;
They have the same electronic configurationThey have similar chemical propertiesBut their masses differsTheir abundance in nature also differs.
Calcium hydroxide reacts with Hydrogen nitrate to form Calcium nitrate and Dihydrogen monoxide.
Answer:
Ca(OH)2 + HNO3 = Ca(NO3)2 + H2O | Chemical reaction and equation.
middle one! please help. i’ll do anything.
Answer:
I believe the answer would be weathering
Answer:
Erosion
Explanation:
Because....
Deposition is the action of deposing someone, especially a monarch.
weathering is the process of wearing or being worn by long exposure to the atmosphere.
HELPPP PLEASE TIME LIMITED!!!
Most of the energy that drives the water cycles comes from which of the following?
O The sun
O Earth's core
O Earth's oceans
O The equator
What do you have to do to change an atom labeled + ion or - ion into a neutral atom?
Answer:
to change an atom labeled + ion or -ion into a neutral atom, an electron is either added or removed from it
Classify each of the following reaction as one of the 5 types: 2 Mg + O2 + 2 MgO O double replacement O decomposition O synthesis combustion O single replacement
Answer:
Synthesis
Explanation:
The reaction:
2Mg + O₂ → 2MgO
This reaction above is a synthesis or combination reaction. In such reaction, several products combines to give a single product.
The formation of a single product from two or more reactants is classified under this type of reaction
The driving force for this reaction type is the large and negative heat of formation of the product.
Which law tells us that the youngest sedimentary layers are on the top and the oldest are on the bottom? None of the above The Law of Superposition The Law of Horizontal Originality The Law of Vertical Position
what element is [Kr]5s24d105p2
[Kr]5s²4d10⁵p² represents iodine element. The fundamental components of matter are thought to be the elements.
What is element?A material is considered an element if it cannot be divided into two or even more simpler compounds by any kind of chemical process, including the use of light or warmth. For instance, when melting the chunk of gold, it nevertheless melts but remains as the precious metal element.
The fundamental components of matter are thought to be the elements. There are currently 118 known elements, 94 of which are found in nature while the remaining 24 are created artificially. [Kr]5s²4d10⁵p² represents iodine element.
Therefore, [Kr]5s²4d10⁵p² represents iodine element.
To know more about element, here:
https://brainly.com/question/29792173
#SPJ2
Moving electrons are known as ______.
Answer:
Electricity
Moving electrons are known as electric current, also known as Electricity.
what are 2 chemical changes of water?
variable for momentum
Answer:
p is the variable for momentum formula is p=mv
Answer:
p
Explanation:
in this equation you insert the known values.. p=mb than you will et your answer
How many moles of O are in Calcium hydroxide - Ca(OH)2?
Look at mah doggo his name is jasper I have another dog but I cant post two pictures
Answer:
☺
Explanation:
Awwww it's so cute
1. What atoms make up a molecule of acetic acid? *
O carbon, sodium, oxygen
sodium, hydrogen, carbon
carbon, hydrogen, oxgyen
sodium, hydrogen, oxgyen
Answer:
carbon,hydrogen and oxygen
molecular formula=CH3COOH
Using the model for the formation of Scandium Fluoride (an ionic compound), write the chemical formula.
Answer:
Sc3F3
I hope its help for you
To make a Br2 bond, how many total valence electrons are required?
1. 7
2. 14
3. 8
4. 16
Answer:
2. 14
Explanation:
To form Br₂ bond, a total of 14 electrons are needed.
Bromine is an element in the 7th group on the periodic table. It has 7 valence electrons.
In forming the bromine gas, the two atoms of bromine shares 7 electrons each. These electrons are from their outermost shell. The outermost shell is the valence shell. So, two atoms donating 7 electrons gives 14 electrons.What is the percentage yield if 125.4g C3H8 are collected from a reaction that should produce 157.4g C3h8?
A. 58.3%
B. 79.2%
C. 44.2%
D. 26.3%
The percentage yield : 79.67%
The closest answer is option B.
Further explanationGiven
125.4 g C3H8
157.4 g C3H8
Required
The percentage yield
Solution
Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated
General formula:
% yield = (actual yield : theoretical yield) x 100%
Input the value :
% yield = (125.4 : 157.4) x 100%
% yield = 79.67
Pollute means “to make impure.” Pollution is “the act of polluting.” If the suffix -ant means “something that performs an action,” what is a pollutant?
Answer:
something that makes another thing impure
Explanation:
Which of these is not an example your body maintaining homeostasis?
A
When exercising, your body releases more energy to your muscles.
B
On a hot summer day, you produce sweat.
C
When you get a virus, your body systems react to fight it.
D
When you see a piece of cake, your mouth waters.
Answer:
D
When you see a piece of cake, your mouth waters.
Explanation:
Homeostasis refers to the self-regulating processes in the human body to maintain stability and survival.
The example of homeostasis that does not occur in the body is:
Option D. When you see a piece of cake, your mouth waters.
The examples of homeostasis in the body are:
The body releases more energy to the muscles during exercises as the movement of muscles is required to main body temperature.Sweating is the process in which salt-based fluid or water is released from the body. It occurs to maintain the stable equilibrium and regulation of temperature. The immune system is tightly involved in the stability and survival of an organism. When a pathogen enters the body, the fighting cells will eliminate the pathogen maintain a normal physiological condition. The process of salivation is a part of digestion in the human body. It is not an example of homeostasis.Thus, the correct answer is Option D.
To know more about homeostasis, refer to the following link:
https://brainly.com/question/9087319
After a certain pesticide compound is applied to crops, its decomposition is a first-order reaction with a half-life of 56 days. What is the rate constant, k, for the decomposition reaction?
The rate constant, k, for the decomposition reaction : k = 0.0124 / days
Further explanationGiven
The half-life of 56 days
Required
The rate constant, k
Solution
For first-order, rate law : ln[A]=−kt+ln[A]o
The half-life : the time required to reduce to half of its initial value.
The half life :
t1/2 = (ln 2) / k
k = (ln 2) / t1/2
k = 0.693 / 56 days
k = 0.0124 / days
The rate constant for the decomposition reaction has been 0.0124/days.
The rate constant has been given by;
log [Final concentration] = kt + log [Initial concentration]
k has been the rate constant, and t has been the time.
The initial concentration has been 1, after the half life period the concentration has been half i.e. 0.5 .
The given half life has been 56 days.
The rate constant can be calculated as:
log 1 = k(56) + log 0.5
k(56) = 0.693
k = 0.0124/days.
The rate constant for the decomposition reaction has been 0.0124/days.
For more information about the rate constant, refer to the link:
https://brainly.com/question/23184115
Chemical compounds will form so that each atom, by gaining, losing or sharing electrons, will have their highest occupied energy level filled is called the
Answer:
it is nobel gas arrangement electronic configuration it become stable
When water forms beads on a surface, as it does on the hood of a freshly waxed car, we can say that the water is ________ its contact with the surface because the cohesive forces are _______ than the adhesive forces.
Answer:
When water forms beads on a surface, as it does on the hood of a freshly waxed car, we can say that the water is minimizing its contact with the surface because the cohesive forces are larger than the adhesive forces
Explanation:
A waxed car's surface is covered wax which is an hydrocarbon having long chains that are very hydrophobic and therefore there is little interaction between the surface covered in wax and the cohesive forces in the water is much larger than the adhesive forces between the water and the freshly waxed car's surface which makes the water bead up to minimize the contact surface with the car's metal surface that results in limiting of the rust.
I thought heavy elements like iron & gold were dense & sank into the interior of the molten planet? How did gold get on top of the less dense crust?
Answer:
If it is denser then water it shall float but if water has a higher density the object sinks
Explanation:
plsssssssssssssssssssssssssssss help
Answer:
a. compound; anion + anion
b. ionic; cation + anion
c. ionic; cation + anion
d. compund; anion + anion
What is the relationship between temperature and reaction rate?
Explanation:
Temperature has a direct relationship with reaction rate. The higher the temperature the faster the rate of reaction of a system.
For every 10°C rise in temperature above the room temperature, it has been found that reaction rates becomes double or triple. When the temperature of a reacting system increases, the kinetic energy of each of the reacting particles increases. The frequency of collision and effective collision also increases per unit of time. Many of the reacting particles will acquire an energy greater than or equal to the activation energy of the reaction.gold is one of the group Metals called the coinage metals. how many atoms of gold are in a u.s. eagle a gold alloy bullion coin with a mass of 31.1 g Au?
Answer:
9.51 x 10²² atoms Au
Explanation:(mass: 31.1g Au)
(m. mass: 196.967 g/mol Au)
(atoms: ?)
(31.1g Au x 1 mol Au x 6.022 x 10²³ atoms Au/ 196.967g Au x 1 mol Au)
Give the missing product Mg + Fe1Cl3 ---> Fe + _?_
The missing product : MgCl₂
Further explanationGiven
The reaction between Mg and FeCl₃
Required
The missing product
Solution
This reaction is a single replacement reaction
Occurs when one element replaces another element in the compound. The more active element will replace the less active element. The activity of this element can be seen from the voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
Mg is located to the left of Fe in the voltaic series so that it can replace Fe from its compound
General formula :
A + BC ⇒ AC + B
So the reaction :
3Mg + 2FeCl₃ → 2Fe + 3MgCl₂