Answer:
3.0%
Explanation:
A solution's mass percent concentration, (% m/m), is calculated by observing the mass of solute in grams of obtained in each 100 g of solution. In simple terms, the solution's mass percent concentration is given by the number of parts of solute obtained in every 100 parts of solution, made up of solute and solvent.
Hence the percent m/m concentration of a solution is obtained as;
Mass of solute/ mass of solution × 100/1
From the question, we have,
Mass of solute= 1.4g
Mass of solution= 46.6 g
Therefore, percent m/m concentration of the saline solution=
1.4/46.6 ×100/1 = 3.0%
The percent solute concentration of the solution is 3.0%
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
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
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 mass of NaOH must be added to the solution to increase the concentration to 30.00% by mass?
Answer:1) 0.0625 g.
2) 0.0125 g.
3) 80.0 g If this right please try to help me!
Answer:0.0125
Explanation:on edge
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 is shown in the diagram?
a generator
an electromagnet
a motor
a turbing
Answer:
I know this and it's a motor
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 .
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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Which of the following are likely to form an ionic bond?
A. Carbon and hydrogen
B. Carbon and sulfur
C. Magnesium and sulfur
D. Nitrogen and oxygen
Answer:
B. Carbon and sulfur
Explanation:
Desert plants have to adapt to a harsh environment. Many desert plants such as the rabbitbrush have small leaves, why? A) large leaves weigh too much B) small leaves reflect the sunlight C) small leaves taste bad to the animals D) small leaves conserve water by reducing transpiration
Answer:
D
Explanation:
they conserve water using less transpiration
Answer:
Hello! Your answer would be, D)Small leaves conserve water by reducing transpiration
Explanation:
Hope I helped! Brainiest plz!♥ Have a nice morning! Hope you make a 100%! -Amelia
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 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 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 is the molarity of 0.945 L of a solution that contains 0.227 moles of Fe(NO3)3?
Answer:
0.2402 M
Explanation:
0.945 L sol contains = 0.227 moles
1 L sol will contain = (0.227/0.945)*1 = 0.2402 moles
Molarity = 0.2402 moles/L or M
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:
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
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
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
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.
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.
The Sl symbol for volume is
Volume = Mass / Density
Thus
Volume = kg/m³
or
[tex]Volume = kgm^{-3}[/tex]
why it is dangerous for people to continue to travel into space?
Answer:
The environment of space is lethal without appropriate protection: the greatest threat in the vacuum of space derives from the lack of oxygen and pressure, although temperature and radiation also pose risks. The effects of space exposure can result in ebullism, hypoxia, hypocapnia, and decompression sickness.
Explanation:
hope that helps love!
Explanation:
This is very dangerous because if something goes wrong while you are in space theres a 50 percenr chance you will die. As of 2020, 19 lives have been lost while in space travel.
What is the relationship between all of these?
Answer:
3
Explanation:
1 3 3 3 is the order of the choose
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
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 :)
Which phrase is the best summery of the model shown?
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.
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: