Help with this please
Answer:
12
Explanation:
There are 4 sulfur atoms in SO4
4×3=12
This means that it turns into 3×(SO4)
=3SO4
If you need to design a technological solution to lack of water availability in a developing country, which of the following should you do before proposing a solution? invest the money to test your most promising design select the best of several possible designs build a model to test research scientific principles involved in water availability
Anwser:
Research scientific principles involved in water availability.
Explanation:
Before building or investment you always want to see and know what your up against and what the best way to help or solve is. Researching why there's a problem in water availability or/and the principals to water availability will help you see what the problem is with what's happening to and around the process and it's environment.
How many molecules of oxygen can be made from 9.52g of nickel (III) oxide?
Answer:
165.385 g/mol
how many moles of s atoms are in 1 mol of CaSO4
I think u asked for the atoms of sulfur? its 4..
Explanation:
calcium = 4
sulfur = 4
oxygen = 4
I hope this is correct
Which of the following do not have angular momentum? Choose all that apply: O A. A spinning planet O B. A boy sleeping in bed O C. A ball sitting in a garbage can O D. A Ferris wheel in motion
Answer:
The answer is A and B
Explanation:
the farm is a place where lot's of different__________and________live.goats have________that arch backward.the horns keep them___________.
horns insects animals protected
dog's are man's best friend.dogs eat ______to keep them energetic.dogs permanent__________are ________.a dogs teeth serve as _______and as tools for ________or________food
meat cutting powerful teeth weapon tearing
Answer:
plantsanimalshornsto protect it selfkaleliving with peoplescaring itspecialbite eatExplanation:
I know it's right, because this answer is from my self and I hope it's help to us. keep learning and God bless.
Can anyone help me with this question?
sure i can help
so u have to ask someone else
Hey! Help please :)
Answer:
6. 15 oxygen atoms (The coefficient 5 is multiplied by the subscript 3 of oxygen)
7. The number "2" is the subscript.
please answer, the question is attached below/above
Answer: No
Explanation: O is a recessive trait so at least there is a mutation, then no.
The collision theory state that?
Answer:
Collision theory states that molecules must collide to react. For most reactions, however, only a small fraction of collisions produce a reaction.
Why is there an octet rule in writing Lewis structures?
Answer:
Before we can sketch the Lewis structures of molecules, we must first understand the octet rule. The octet rule asserts that when atoms combine to create compounds, electrons are gained, lost, or shared among them, resulting in a stable electron configuration defined by eight valence electrons as a result. These rules are used in conjunction with the main-group components of the second period.
Explanation:
Hope it helps:)
which of the following statements is true?
just look at the picture
c
Explanation:
compounds are combine from two or more elements
hidrógeno
notacion electronica
Answer:
Hydrogen
Electronic notation
Explanation:
8) Structures that regulate which molecules,
nutrients, and substances enter the cell are
A) Genes
B) Endoplasmic Reticulum
C) Cell Membranes
D) Centrioles
What statement describes how water is involved in weathering a rock?
Answer:
Water, in either liquid or solid form, is often a key agent of mechanical weathering. For instance, liquid water can seep into cracks and crevices in rock. If temperatures drop low enough, the water will freeze. ... Changes in temperature cause rock to expand (with heat) and contract (with cold).
Answer:
the rock has been rubbed away at for hundreds or thousands of years and the water steady washed the rock away. hope this helped.
How much heat is required to increase the temperature of 150 g of water from
38°C -55°C?
Answer:
-55°C
Explanation:
Bwcause 38°C is gonna make it colder so thats why you should use that.
How many carbon (C) atoms are in C3Hg? A. 8 B. 5 C. 1 D. 3
Answer:
the answer is D
Write the formula of the conjugate base of C6H5SH.
Answer:
C6H5S^-
Explanation:
This is because you are removing the hydrogen to make it a conjugate base.
The formula for conjugate base of C6H5SH is C6H5S⁻.
What is conjugate base?Conjugate base is defined as the substance which is formed when an acid liberate its protons.
The acid donate protons and the acid changes into base.
Conjugate acid is defined as the pair of compound that differs by its protons by gaining protons.
Conjugate acid and base are based in acid base theory.
Thus, the formula for conjugate base of C6H5SH is C6H5S⁻.
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The table compares vapor pressure values for water ethanol and diethyl ether Add six temperatures determine the approximate normal boiling point for each substance what do the data suggest about the relative strength of attraction between particles in each substance
Water has the strongest intermolecular forces followed by ethanol and diethyl ether has the least intermolecular forces.
From the table, we can see the vapor pressures of water, ethanol and diethyl ether. The boiling point of water is 100°C, the boiling point of ethanol is 80°C while the boiling point of diethyl ether is 40°C.
We can see that the vapor pressures and approximate normal boiling points of the substances varies with the nature of intermolecular bond forces in the molecule.
Water has highest boiling point and the lowest vapor pressure followed by ethanol. Diethyl ether has the highest vapor pressure and lowest boiling point from the data in the table.
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plz help someone thx
Answer:
Glycerin
Explanation:
The stronger the intermolecular forces of attraction the more energy is required to break those forces, if you need more energy to break these forces it means that these certain elements would have a higher boiling point. Which is why the answer is Glycerin, the highest boiling point of an element means that it has the strongest forces, which in this case is electrostatic forces.
Answer:
Glycerin
Explanation:
Relate microscopic bonding properties to solid state properties
There are many factors that we can take into account when attempting to relate microscopic bonding properties to solid-state properties, for example, the rigid and immobile nature of solid states and their molecular bonds.
Solid-state properties are simply put, the properties we can observe and measure when studying an element in solid form. These solids have specific characteristics such as:
Structural rigidityThey do not change shapeDo not change the volume they occupyand so on, which although not initially obvious, are caused by the microscopic molecular bonds of their atoms.
The microscopic properties of solids are very similar to that of the solid-state properties. The atoms of a solid are very close together and strongly bonded to one another, because of this the atoms form a very rigid structure that resists changes to their shape or volume, much like the macroscopic properties of the solid. This serves to show how these properties may cause the solid-state effects we can observe normally.
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If 22.5 L of nitrogen at 748.3 mm Hg is changed to a pressure of 1294.6 mm Hg at constant
temperature. What is the new volume?
Answer:
it down their!!!!!!!!!!1
Explanation:
The new volume
=
23.2
L
PLEASE ANSWER ASAP!!!
The movement of tectonic plates in two different locations is shown below:
Two blocks labeled Location A and Location B are shown. The block labeled A has a vertical line in the middle. On the left of the line there is an arrow pointing down. On the right of the vertical line there is an arrow pointing up. At Location B the top layer of the block shows two horizontal arrows pointing towards each other. The portion of this block on the right is shown moving down.
Which statement is most likely true?
Subduction occurs in both locations.
The magnetic orientation of rocks may change in Location A and subduction occurs in Location B.
Subduction occurs in Location A and the magnetic orientation of rocks may change in Location B.
Answer: its a and b
Explanation:its very simple and the reason is bc yea
Answer:
B
Explanation:
The answer is B because it said subduction i guess. And I got it right! Hope this helps to anyone that is looking at this!
physical and chemical changes occur in digestion. What is an example of an physical change in digestion
teeth chewing food
acid mixing with food
saliva mixing with food
enzymes mixing with food
Answer:
teeth chewing food
Explanation:
When teeth chews food it change its state from hard solid to fine substance that can be easily digested by the body i guess
When 0.005 moles of silver(1) nitrate reacts with sodium carbonate, which of the following statement is correct?
(You must show all your work)
A) This is a redox reaction
B) This is a precipitation reaction and 0.69 g of the precipitate will be formed
C) This is a precipitation reaction and 1.38 g of the precipitate will be formed
D) This is a precipitation reaction and 0.83 g of the precipitate will be formed
Explanation:
no sé de qué me estás hablando
This is a precipitation reaction and 1.38 g of the precipitate will be formed is the statement is correct. Hence, option C is correct.
What is a precipitation reaction?A precipitation reaction is when two or more dissolved chemicals combine to form one solid products. The exchange of ions between ionic compounds in aqueous solutions is a common component of these reactions, which are also occasionally referred to as double displacement, double replacement, or metathesis reactions.
in response to precipitation a process that converts soluble salts into solids that are insoluble in water. a neutralizing response an interaction between an acid and a base that results in the production of salt, water, and an ionic molecule.
Precipitate refers to a solid that forms from a solution. The blending of two transparent solutions is a common example: NaCl in combination with silver nitrate The answer is. The soli cannot be dissolved in water.
Thus, option C is correct.
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a peanut butter and jelly sandwich contains 9.00 g of fat, 6.00 g of protein, and 25.0 g of carbohydrate. How many calories does this sandwich provide?
Answer:
205 calories.
Explanation:
According to the USDA, "Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram." 9 grams of fat at 9 calories per equals 81 calories + 6 grams of protein at 4 calories per gram which equals 24 calories + 25 grams of carbohydrate at 4 calories per gram which is equal to 100 calories.
Total that all up and you get 81 cal + 24 cal + 100 cal=205 calories.
I don't know what kind of course this is for, but if they are incredibly picky, what we refer to as "calories" are actually kilocalories, which are equal to one thousand "real" calories each. However, I'm very confident that the correct answer is 205 calories.
The sandwich will provide 205 calories.
What is calories?A calorie is an energy unit. It's the quantity of heat needed to increase the temperature of one gramme of water by [tex]1^{0} C[/tex] at one atmosphere of pressure.
Its is given that, Fat = 9 g, protein = 6 g, carbohydrate = 25 g.
It is known that, fat contains 9 calories / gram , carbohydrate contains 4 calories / gram and protein contains 4 calories / gram.
Now, adding all terms.
Total calories = (9×9) +(6×4) +(25×4)
= 205 calories.
Therefore, the sandwich will provide a total of 205 calories.
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Airflow through a long 0.2m square air conditioning duct maintained the outer duct surface temperature at 10degree.if the horizontal duct is uninsulated and exposed to air at 35degree in the crawl space beneath at home.
What is the heat gain per unit length of the duct.
Answer:
125°C/m
Explanation:
The difference in temperature will be:
35 - 10 = 25
The outer duct surface is heated 25°C by the air from 10°C to 35°C;
This heat gain is simply divided by 0.2m to get heat gain per unit length:
25/0.2 = 125
125°C/m
If you're American, this will be °F I believe, so the answer will be:
125°F/m
(50 POINT) use this to answer: https://phet.colorado.edu/sims/html/acid-base-solutions/latest/acid-base-solutions_en.html
Describe how you could adjust the settings of the simulation to increase the number of red (H3O+) and blue (A-) particles in the solution of equilibrium. In three to four sentences, justify your answer and explain how and why this would change the pH of the solution.
The addition of more acid or base will increase the number of H3O+ and A- particles thereby decreasing and increasing the pH of the solution respectively.
What is an acid-base titration?An acid-base titration is one in which an acid is added to a given volume of base in order to neutralize it.
When more of acid is added to a solution of a base than is required to neutralize it, the solution becomes acidic.
Similarly, when more base is use to neutralize an acid than is required, the solution becomes alkaline.
In the given simulation, (H3O+) is the acid while (A-) is the base.
By adding increasing the quantity of acid added, the number of H3O+ particles will increase. This will reduce the pH of the solution.
Also, the adding more base to the solution, the number of A- particles in the solution will increase. This will increase the pH of the solution.
Therefore, addition of more acid or base will increase the number of H3O+ and A- particles thereby decreasing and increasing the pH of the solution respectively.
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Dirty water is a _____.
mixture
or
compound ?
Answer: mixture
Explanation: they are heterogeneous mixtures not homogeneous
It's Mixture
Reason:- Dirty water is a mixture of dirt and water. Mixture are made up of 2 or more different substance with different characteristics
A piece of potato had an original mass of 3.2g and after being left in a sugar solution for 24 hours it then had a mass of 2.8g. Calculate the percentage mass decrease of the potato.
Answer: -13% to 3 sig figs
Explanation:
A piece of potato had an original mass of 3.2g and after being left in a sugar solution for 24 hours it then had a mass of 2.8g. Calculate the percentage mass decrease of the potato.
the change in mass is 2.8 -3.2 = -0.4 gm
the % change fro the origial piece is ( -0.4/3.2) X 100 = -12.5%
or -13% to 3 sig figs