Answer:
C) periodic table
Explanation:
Answer:
c
Explanation:
cmon its so obvious
Which of the following are more reactive than iron?
Check all that apply.
A. Aluminum
B. Potassium
C. "Gold
D. Silver
Answer:
The answer is A and B.
Explanation:
Using Reactivity Series .
A sample of 450.0 g of water is found to contain 180 mg Cd. What is this concentration in parts per million?
Answer:
The correct answer is 399.8 ppm
Explanation:
A concentration in parts per million (ppm) is equal to:
[tex]1 ppm = \frac{1 g solute}{10^{6}g solution}= \frac{1 mg solute}{1 kg solution}[/tex]
Solute: Cd; Mass = 180 mg x (1 g/1000 mg) = 0.18 g
Solvent: Water ; Mass= 450.0 g x (1 kg/1000 g) = 0.45 kg
We have the following total mass of solution:
Mass of solution = Mass of solute + Mass of solvent = 0.18 g + 450 g = 450.18 g = 0.45018 kg
Finally, we divide the mass of solute (in mg) into the mass of solution (in kg) to obtain the ppm (in mg/Kg):
ppm = 180 mg/0.45018 kg = 399.8 mg/Kg = 399.8 ppm
WILL MARK AS BRAINLIEST! PLEASE HELP
Identify the oxidation number of a Cr atom
in each of the following: CrO3, Cro, Cr(s),
CrO2, Cr2O3, Cr2O3 , and Cro2-7, and Cro2-4
Answer:
jggjjvficfivfivgihggii
distinguish between the climates of a coastal location and a location in the center of a large continent.
Answer:
Climatic condition in coastal regions is milder than the climatic conditions in the continental regions.
Explanation:
Climate in coastal regions is mild. It has both hot summers and winters accompanied by sea breezes. Precipitation and humidity is high in coastal areas. Both the summers and winters have a mild temperature range.
While in continental regions both summer and winters undergo extreme conditions. Summers are extremely hot and winters are extremely cold. They have wide range of climatic exposures such as rainy season, autumn season and spring season in between summer and winter season.
What is shown in the diagram?
a generator
an electromagnet
a motor
a turbing
Answer:
I know this and it's a motor
The Sl symbol for volume is
Volume = Mass / Density
Thus
Volume = kg/m³
or
[tex]Volume = kgm^{-3}[/tex]
How does Q compare to Keg?
O Q> Keq
O Q< Kea
OQ = Keg
Answer:
Q<Keq
Explanation:
just found out they ask this question twice,
the one on top is right but for the second time this question is asked.
my answer is right for the first time it is asked.
thank you for your time.
In chemical equilibrium, the equilibrium constant is greater than reaction quotient that is Q< Keq.
What is chemical equilibrium?Chemical equilibrium is defined as the condition which arises during the course of a reversible chemical reaction with no net change in amount of reactants and products.A reversible chemical reaction is the one wherein the products as soon as they are formed react together to produce back the reactants.
At equilibrium, the two opposing reactions which take place take place at equal rates and there is no net change in amount of the substances which are involved in the chemical reaction.At equilibrium, the reaction is considered to be complete . Conditions which are required for equilibrium are given by quantitative formulation.
Factors which affect chemical equilibrium are change in concentration , change in pressure and temperature and presence of catalyst.
Learn more about chemical equilibrium,here:
https://brainly.com/question/4289021
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why is a triangle stronger than a square?
Answer: Triangles are the strongest shape because they have fixed angles and don't distort very easily. Much of that works because the results from the characteristics of triangles, which are the strongest of all shapes.
Explanation: Hope this helps and I can get brainliest :)
What is the answer to this question
Answer:
C
Explanation:
C is the correct answer to this question.
One parent is homozygous and has brown fur...
Hope this helps.
how do you determine how many electron energy levels an element has
Answer:36
Explanation:
Atoms must have equal numbers of protons and electrons. In our example, an atom of krypton must contain 36 electrons since it contains 36 protons. Electrons are arranged around atoms in a special way.
Answer:
Explanation:
The maximum number of electrons that can occupy a specific energy level can be found using the following formula: Electron Capacity = 2 n 2 The variable n represents the Principal Quantum Number, the number of the energy level in question.
If all people understood the common heritage that we have with the Earth and our environment - namely, that the very atoms that make up our bodies were formed in stars, just like the atoms in rocks, in the atmosphere and in every living thing - would people be more inclined to treat the environment with more care?
Answer:
No
Explanation:
It is one of those harsh realities that no matter how hard we try to connect people to their roots aka make them understand that everything is interconnected like the breathe you throw out is used by plants in photosynthesis, the O2 plants give is used by us. Living beings and Non-living beings are all connected and most humans know about this. But, when it comes time for earning the $$$, people's judgements are often clouded by their greed hence no matter how hard we try to make people understand we are all connected and that they should take care of the environment more, they will likely treat the environment as they always have been: to serve their financial and selfish needs.
TLDR: People are selfish hence probably will not treat environment with more care even if we educate them about our interconnectedness.
Using m1v1=m2v2,a 0.5 liters of 12 Molarity solution of NaCl was added to a 2.0 liters of water,find out the final molarity of this 2.5 liter solution
Answer:
2.4 M
Explanation:
The dilution formula, M1V1 = M2V2, states that the initial molarity times the initial volume equals the final molarity times the final volume. Plug in the values and solve for M2:
12 M * 0.5 L = M2 * 2.5 L
6 = M2 * 2.5 L
M2 * 2.5 L = 6
M2 = 6 / 2.5 = 2.4 M
What mass of potassium chlorate is needed to produce 8.50 mol of oxygen? 2KCIO3 →
2KCl +302
Answer:
694.2915 grams of potassium chlorate is needed to produce 8.50 mol of oxygen
Explanation:
It is possible to apply the following rule of three: if by stoichiometry 3 moles of O₂ are produced by 2 moles of KCIO₃, when reacting 8.5 moles of O₂, how many moles of KClO₃ are necessary?
[tex]moles of KClO_{3} =\frac{8.5moles of O_{2}*2moles of KClO_{3} }{3moles of O_{2}}[/tex]
moles of KClO₃= 5.67
To know the amount of mass present in 5.67 moles of the compound, it is necessary to know the molar mass, that is, the amount of mass that a substance contains in one mole. Being:
K: 39 g/moleCl: 35.45 g/moleO: 16 g/moleThe molar mass of the compound is:
KClO₃= 39 g/mole + 35.45 g/mole + 3* (16 g/mole)= 122.45 g/mole
Then you can apply the following rule of three: if in 1 mole of the compound there are 122.45 grams, in 5.67 moles how much mass is there?
[tex]mass=\frac{5.67 moles*122.45 grams}{1 mole}[/tex]
mass= 694.2915 grams
694.2915 grams of potassium chlorate is needed to produce 8.50 mol of oxygen
How many ions does each of these symbols have, I need answer and my science teacher doesn’t tell us or explain it to us
Answer: about 14
Explanation:
What drives this process?
Answer:
D.
Explanation:
The sun makes the land warm, while the water stays colder. This make the warm air rise off the ground and causes the cool are to replace it (making it come from the ocean)
Which of these hypotheses would lead to the best scientific investigation?
A) Lettuce is crunchy.
B) Potato chips taste the best.
C) The average score on the biology test was 78%.
D) People prefer green candy over red candy.
Answer:
D people prefer green candy over red candy
Explanation:correct
Answer: d
Explanation:
A pathogen enters an organism and infects it. Which statement best describes the general effect of the infection on the organism? *
A. The organism experiences a disruption in homeostasis.
B. The organism cannot obtain energy.
C. The organism cannot reproduce.
D. The organism experiences uncontrolled cell growth.
Answer:
Option A, The organism experiences a disruption in homeostasis.
Explanation:
When a pathogen enters the organism’s body, it disrupts its homeostasis. There are several receptors in the body that are responsible for maintaining the stability of the body through negative feedback loop.
A foreign element attaches to the surface of these receptors and hence disrupts their attachment with the probable substance necessary for the regulation of essential body function.
Thus, the temperature regulation get s impaired, hormonal imbalances occur, feeding system disturbs etc.
Hence, option A is correct
Which phrase is the best summery of the model shown?
To determine if something is a living organism,
you could check to see if it responds to its
environment.
TRUE
FALSE
Answer:
Yes, it's A) True
Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen,
and nitrogen. Which term most likely describes what she is measuring?
final pressure
atmospheric pressure
combined pressure
partial pressure
Answer:
Partial pressure
Explanation:
the scientists is measuring different pressure, so it would be partial pressure. Hope that this helps you and have a great day :)
Which features may form as a result of erosion related to runoff? Select three options.
deltas
gullies
rills
stalactites
tributaries
Answer:
gullies
rills
tributaries
Are the correct answers!!
Explanation:
A gully is a landform created by running water, eroding sharply into soil, typically on a hillside.
A rill is a shallow channel cut into soil by the erosive action of flowing water.
A tributary is a stream or river that flows into and joins a main river.
Hope this Helps..Mark as Brainliest!!
Complete the following sentence: "During a chemical reaction."
Select one:
O
the number of atoms in the product(s) is less than those of the reactant(s).
O
the mass of the atoms of the product(s) is greater than those of the reactants).
O
a small amount of matter is destroyed during the process
a new substance(s) with the same number of atoms as the initial substance(s) is
tormed
Answer: a new substance(s) with the same number of atoms as the initial substance(s) is formed
Explanation:
Chemical reaction is a reaction in which there is rearrangement of atoms and thus new substance is formed.
According to the law of conservation of mass, mass can neither be created nor be destroyed in chemical reaction. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
What are most conductors made of?
A: Wood
B: Paper
C: Plastic
D: Metal
Answer:
D: Metal
Explanation:
Most conductors are made from metal, for the alloys allow for a "freer" passage way for electrons to pass through.
~
Answer:
D. Metal
Explanation:
hopeee thisss helpss
What is the relationship between all of these?
Answer:
3
Explanation:
1 3 3 3 is the order of the choose
CAPITAL LETTERS
in a genotype
mean...
Answer:
GENOTYPE IS THE COLLECTION OF GENES RESPONSIBLE FOR THE VARIOUS GENETIC TRAITS OF A GIVEN ORGANISM
Answer:
A capital letter represents the dominant form of a gene (allele),
and a lowercase letter represents the recessive form of the gene (allele).
Hope this helps..
2. Can oxidation occur without reduction? Explain.
Answer: Nope
Explanation:
Oxidation occurs because an agent that causes the oxidation---the oxidizing agent---must itself get reduced
Can you live without body tissue? This is a yes or no question, no explaining required, but you can add it if you want. :D
it depends but no you cant
What would be challenging about life on Mars?
Answer: it would be too hot to live on and hard to get any oxygen from the ground because it doesn’t support life there.
Explanation:
science.
Answer:
On Mars, it is too cold to support life, the only existing water is at it's north and south pole in solid form (ice). It's atmosphere is about 100 times thinner than Earth's so it couldn't hold in any heat anyway.
What is the definition of a Lewis base?
a substance that donates a proton
a substance that donates electrons to form a covalent bond
a substance that accepts electrons to form a covalent bond
a substance that when dissolved in water increases hydrogen ion concentration
Answer:
the definition is : a compound or ionic species which can donate an electron pair to an acceptor compound.
so as far as i know i know the answer is: a substance that accepts electrons to form a covalent bond.
please mark me brainliest may god bless you...
Explanation:
The definition of a Lewis base is: C. a substance that accepts electrons to form a covalent bond.
What is a Lewis base?
A Lewis base can be defined as a specie of an ionic or chemical compound that contains an empty orbital which allows it to donate an electron pair (two or more electrons) to form a covalent bond.
This ultimately implies that, a Lewis base is a chemical substance that accepts an electron pair (two or more electrons) to form a covalent bond.
Examples of a Lewis base.In Chemistry, some examples of a Lewis base include the following:
[tex]OH^-[/tex]CO[tex]H_2O[/tex]ROH[tex]NH_3[/tex]Read more on Lewis base here: https://brainly.com/question/3655338
Which represents the balanced equation for the beta minus emission of phosphorus-32? Superscript 32 subscript 15 upper P right arrow superscript 28 subscript 13 upper A l plus superscript 4 subscript 2 upper H e. Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 14 upper S i plus superscript 0 subscript negative 1 e. Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 16 upper S plus superscript 0 subscript negative 1 e. Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 14 upper S i plus superscript 0 subscript plus 1 e.
Answer: Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 16 upper S plus superscript 0 subscript negative 1 e.
Explanation:
Beta Decay : It is a type of decay process, in which a proton gets converted to neutron and an electron. This is also known as -decay. In this the mass number remains same but the atomic number is increased by 1.
The general representation of beta minus emission is :
[tex]_A^Z\textrm{X}\rightarrow _{A+1}^Z\textrm{Y}+_{-1}^0e[/tex]
The representation of beta decay of phosphorous- 32 :
[tex]_{15}^{32}\textrm{P}\rightarrow _{16}^{32}\textrm{S}+_{-1}^0e[/tex]
Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 16 upper S plus superscript 0 subscript negative 1 e.
Answer:
C
Explanation: