Answers
Answer:
A-20 B-40 C-Ca D-10 E-9 F-F
Explanation:
----------------------------------------------atomic number= no.of protonsand mass no.= no. of protons+no. of neutrons__________________________A= 20B= 40C= caD= 10E= 9F=FRelated Questions
what size volumetric flask would be useful in diluting 100 ml of a 3.0 m solution of sucrose to make a 0.60 m solution. dilutions worksheet answers
Answers
The size of volumetric flask that would be useful in diluting 100 ml of a 3.0 M solution of sucrose to make a 0.60M solution is 500mL.
How to calculate volume?The volume of a solution can be calculated by using the following expression;
C1V1 = C2V2
Where;
C1 = initial concentrationC2 = final concentrationV1 = initial volumeV2 = final volume3 × 100 = V2 × 0.60
300 = 0.6V2
V2 = 300 ÷ 0.6
V2 = 500mL
Therefore, the size of volumetric flask that would be useful in diluting 100 ml of a 3.0 M solution of sucrose to make a 0.60M solution is 500mL.
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Which of these substances is the most basic (alkaline)? solution A, pOH = 1. 5 solution B, pOH = 7. 0 solution C, pOH = 13. 5.
Answers
pH of solution A is 12.5 and it is the most basic (alkaline) among all.
What is basic solution?Those solution which are having value more than 7 in the pH scale shows the basic character and relation between pH & pOH will be represented as:
pH + pOH = 14
Now we calculate the pH for given solutions:
For solution A, pOH = 1.5
pH = 14 - 1.5 = 12.5
For solution B, pOH = 7
pH = 14 - 7 = 7
For solution C, pOH = 13.5
pH = 14 - 13.5 = 0.5
Value of pH for solution A is highest and shows basic nature, solution B is neutral and solution C is acidic in nature.
Hence, solution A is most basic.
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What are two different ways that electrons can become excited
Answers
Absorbing light and through collisions
When the temperature goes up, the pressure will go up.
What is the reason?
Mention a real-world example?
Answers
Ex: A 5% increase in absolute temperature will resultin a 5% increase in the absolute pressure. ... Resultant pressure changes will vary. A useful thumb rule for water is that pressure in a water-solid system will increase about 100 psi for every 1 F increase in temperature.
Explanation:
As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.
For example, if an engineer has to store 600g of oxygen in a container and that oxygen needs to be kept at a pressure of 1 atm and a temperature of 125 degrees Fahrenheit, then this theorem (which is called Ideal Gas Law) is used to figure out what volume of a container needs to be built.
How do tides generate electricity?
Answers
Answer:
Tidal power surrounds gravitational hydropower, which uses the movement of water to push a turbine to generate electricity.
Explanation:
:)
Answer:
hydropower that works by harnessing the kinetic energy created by the rise and falls of the tides.
Explanation:
I already gave you the answer this morning but here's the answer again
The greater in ecosystems blank the more likely it is that some organisms could survive caster traffic environmental changes
Answers
Answer:
The answer is species diversity
Explanation:
Hope this helps:)......if not then sorry for wasting your time and may God bless you:)
A chemical change occurs when one or more substances change into entirely new substances with new and different properties. true or false?
Answers
Explanation:
When the chemical change take place, the original substance is turned into one or more new substances which have different physical and chemical properties from the reactants.
Answer:
true
Explanation:
what is substance take change everything changes
please help will mark brainliest
1) what proccess can be used to extract pure water from salt water ?
2) how is an element different to a compound
Answers
Answer:
1= simple distillation
2 - elements contain just one type of atom ; compounds contain atoms of at least two different elements , which have been chemically combined or bonded
Explanation:
hope this helps
Answer:
chromotragraphy
because it has mixture of compounds and elements
i think these are the answers
Explanation:
ANSWER THIS QUICKLY FOR BRAINLIEST!!
Answers
Answer:
do good
Explanation:
do good
How many methane molecules could form from these reactants? limiting reactants gizmo answers
Answers
Answer:
Explanation:not
describe ph scale in detail
Answers
Answer:
pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
12.09 kcal of energy is added to 45 grams of water at an initial temperature of
23.4°C. What is the final temperature of the water?
Answers
For 12.09 kcal of energy, added to 45 grams of water at an initial temperature of 23.4°C, the final temperature of the water is mathematically given as
T2=290C
What is the final temperature of the water?Generally, the equation for the Energy is mathematically given as
Q=mcdT
Therefore
Q=mcdT
12.09=45*(23.4-T2)
T2=290C
In conclusion, the final temperature is
T2=290C
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Compare and contrast the concepts of average mass and relative mass. Which one is more accurate, and why? Why is the one you did not choose inaccurate?
Answers
Answer:
Relative and average atomic mass both describe properties of an element related to its different isotopes.
Explanation:However, relative atomic mass is a standardized number that's assumed to be correct under most circumstances, while average atomic mass is only true for a specific sample.
Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate.
What is mass?Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.
The relative mass is the mass that is with respect to mass of a matter that is considered as standard. In chemistry relative mass is equal to the mass of one-twelfth the mass of [tex]C-12[/tex] isotope .
Out of relative and average atomic mass, relative atomic mass is more accurate as it is calculated with respect to a standard quantity.
Thus Relative atomic mass is more accurate than average atomic mass.
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Relative and average atomic mass both describe properties of an element related to its different isotopes.
Explanation: However, relative atomic mass is a standardized number that's assumed to be correct under most circumstances, while average atomic mass is only true for a specific sample.
why would adding water to the ester reaction mixture help us smell the ester
Answers
Answer:
A simple way of detecting the smell of the ester is to pour the mixture into some water in a small beaker. Esters are virtually insoluble in water and tend to form a thin layer on the surface. Excess acid and alcohol both dissolve and are tucked safely away under the ester laye
If 45.0 grams of magnesium hydroxide (fm = 58.33 grams) is reacted, how much water (fm = 18.02 grams) will be produced?
group of answer choices
13.9 grams
72.8 grams
27.8 grams
146 grams
Answers
If 45.0 grams of magnesium hydroxide is heated, the amount of water that will be produced would be 13.90 grams
Stoichiometric calculationsFrom the equation of the reaction:
Mg(OH)₂ → MgO + H₂O
The mole ratio of Mg(OH)₂ to H₂O is 1:1
Mole of 45 grams Mg(OH)₂ = 45/58.33 = 0.77 moles
Thus, the equivalent mole of H₂O produced would also be 0.77 moles.
Mass of 0.77 moles H₂O = 0.77 x 18.02 = 13.90 grams
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A unit of length in the metric system is the
Answers
Answer:
B) kilometer.
Explanation:
Took the test
What is a balanced equation?
Answers
Answer:
A balanced equation is a chemical equation where there are equal numbers of atoms of each element on both sides of the equation.
A chemical equation that has a equal amount of each
each element on the left and right sides
please help... thanks... please take all the time you need. :D
Answers
Answer:
1. The vernal equinox
- happens around March 21st
- has days and nights of equal length
2. In the southern hemisphere, the longest day happens during
- June
3. During the winter in the northern hemisphere
- the days are shorter than during summer
Answer:
1)the vernal equinox happens around March 21st
2)in the southern hemisphere the longest day of the year happens during december
3)The days are shorter then during the summer.
Explanation:
name some compounds with their colours pls help.
Answers
Explanation:
manganese(11)
chloride =color pink
tetrahydate
copper(11)
chloride =color blue green
dihydrate
nickel(11)
chloride =color green
hexahydrate
Answer:
Explanation:
Iron(II) sulphate crystals are green.
Solid Ferric, ( Fe(III) chloride is brown.
Copper Sulphate is blue.
Calcium Sulphate is white.
Barium Sulphate is white.
what is the volume of an object with a mass of 31g and density of 444g/ml
Answers
Answer:
The answer is 0.07 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 31 g
density = 444 g/mL
We have
[tex]volume = \frac{31}{444} \\ = 0.06981...[/tex]
We have the final answer as
0.07 mLHope this helps you
What is the benefit of having a detailed procedure to follow
Answers
Answer:
see answer below
Explanation:
LOL idk what this question is about but to my understanding, having a detailed procedure gives u more clue on what u r doing and how u r doing it. think of this like a instruction manual, if u want to build a telescope and have no idea how to build it and the instrutions only give u short sentences like"screw nails next to the finger scope" or something like that wouldnt help much. i dont know about u but i rather prefer instructions written like this"first screw the nail beside the finger scope, DO NOT unscrew the botton" and continue. i cant build a telescope so yea dont know any directions to that.
If a spacecraft was parked on Venus and needed to make a flight to Jupiter, how far would it need to travel? Please show your work.
Answers
Answer:
If a spacecraft was parked on Venus and needed to make a flight to Jupiter, it would need to travel 670,338,270 km.
Explanation:
Jupiter - Various Properties
Jupiter Meaning:
Jupiter is the largest planet in the solar system. Fittingly, it was named after the king of the gods in Roman mythology. In a similar manner, the ancient Greeks named the planet after Zeus, the king of the Greek pantheon.
Jupiter is a gas giant that is the 5th planet from the sun. It is known as the biggest planet in the solar system. It is a very marvelous planet regarding the characteristics of the atmosphere and “surface” of the planet.The planet is a gas giant, so the whole planet that could’ve been the crust and the mantle is full of poisonous gases. Except for the core, it is full of rocky metals. The planet Jupiter has approximately 70 moons. Jupiter has a high gravitational pull, so it can easily grasp some satellites or other rocky bodies into its collection.Jupiter’s distance from the sun is 483.8 million miles.It’s orbital period is 12 earth years.Jupiter’s length of a day is 9 hours and 56 minutes.Jupiter has a radius of 43,441 miles.Has a gravity of 24.79 m/s squared.Venus - Various Properties
It's very hot. It has a thick dense atmosphere bloated with strong greenhouse gasses.Its also the second brightest celestial body when viewed from Earth due to its reflective gasses.It is also very volcanically active. From what we know now, Venus has no tectonic plates.Venus is also very similar in size to Earth.Venus Meaning:
Venus (plural veneres) is the Latin word for ‘loveliness,’ ‘beauty,’ ‘charm,’ It is derived from Proto-Italic *wenos- ('desire'). The ultimate source is the Proto-Indo-European (PIE) *wenh₁-os ('desire').
---------------------------------------------------------------------------------------------------To calculate how far the spacecraft would need to fly is to calculate the distance betwen Venus and Jupiter.
To save energy, let's consider a Hohmann transfer orbit, an ellipse tangent to opposite sides of Venus's and Jupiter's orbits. The spacecraft would follow the outbound half of this orbit, departing ahead of Venus and arriving as Jupiter overtakes it.
Depending on where in Jupiter's orbit the spacecraft meets it, this orbit has semi-major axis a = (rV + rJ) / 2 = 2.96±0.03 au and period of a3/2 = 5.10±0.08 years. The outbound half has a path length of 7.78±0.07 au and takes 2.55±0.04 years. As Jupiter moves 72° to 84° around the Sun in that time, the launch window is when Venus's heliocentric ecliptic longitude is 96° to 108° behind Jupiter's.
To convert au to km, multiply by 1.496 × 108 km / au.
---------------------------------------------------------------------------------------------------Answer:If a spacecraft was parked on Venus and needed to make a flight to Jupiter, it would need to travel 670,338,270 km.
Answer:
If a spacecraft was parked on Venus and needed to make a flight to Jupiter, it would need to travel 670,338,270 km.
Explanation:
How many F atoms in 40 grams CuF2?
Answers
60 points please help me! i will appreciate it!
Answers
Answer:
[tex]\huge\boxed{\sf 1.51\ L}[/tex]
Explanation:
From the reaction:
2 moles of Na produce 1 mole of H₂
Converting 3.10 g of Na into moles:
Moles = mass / molar mass
= 3.10 / 23
= 0.135 mol
From the reaction:
2 Na = 1 H₂
1 Na = 1/2 H₂
1 Na = 0.5 H₂
1 mol of Na = 0.5 mol of H₂
0.135 mol of Na = 0.5 × 0.135 mol of H₂
0.135 mol of Na = 0.067 mol of H₂
So, 0.135 mol of Na (3.10 g) produce 0.067 mol of H₂
Convert 0.067 mol of H₂ into L:
= mol × molar value
[molar value = 22.4 L/mol]
= 0.067 × 22.4
= 1.51 L
[tex]\rule[225]{225}{2}[/tex]
What is the density of an object with a mass of 16 g and 3.0 ml
Answers
Answer:
D = 5.3 g/mL
Explanation:
Density = Mass over Volume
D = m/V
Step 1: Define
D = unknown
m = 16 g
v = 3.0 mL
Step 2: Substitute and Evaluate
D = 16 g / 3.0 mL
D = 5.333333333 g/mL
Step 3: Simplify
We have 2 sig figs.
5.333333333 g/mL ≈ 5.3 g/mL
Describe the structure of DNA.
Answers
Answer:
DNA is made up of two strands of nucleotides. The nucleotides are made up of a sugar (deoxyribose in DNA), a phosphate, and a nitrogen base. The sugars and phosphates make up the "handrails" (or "backbone"), and are held together by covalent bonds.
Explanation:
What could happen to homeostasis if the nervous system and the endocrine system stop communicating? Use one specific example in your answer.
Answers
Answer:
What could happen if the nervous system and the endocrine system stopped communicating is that body regulation functions would be lost, constituting the loss of organic balance or homeostasis.
Explanation:
There is a close relationship between the nervous and endocrine systems, or what is also known as the neuroendocrine system.
The nervous system is in charge of the regulation of all the vital functions, receiving external information, processing it and elaborating an adequate response. When it comes to the internal functions of the organism, the endocrine system receives orders from the nervous system to regulate them and maintain homeostasis.
If the communication between Nervous system and the endocrine system did not exist, there would be no way to regulate many functions and the organism would lose its ability to maintain internal balance.
An example of this would be the function of vasopressin or antidiuretic hormone (ADH). This hormone is produced by the hypothalamus and released by the neurohypophysis, being its main function the regulation of the hydroelectrolytic balance. If the communication between both systems did not exist, the function of ADH would not be possible, and the hydroelectrolytic balance would be lost.
If there is no communication between Nervous system and the endocrine system, there would be no way to regulate many functions and the organism would lose its ability to maintain internal balance.
⇒For example:
The activity and role of the adrenal glands in response to stress provide an excellent example of interdependency of the nervous and endocrine systems and if there is no communication between the two systems thus there will be no activity of adrenal glands.
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how do you do this
A regulation NBA basketball has a radius of 12 cm when inflated properly. What is the volume of an inflated basketball in cm^3?
someone help lol
Answers
Answer:
The volume of basketball is 7216.5 cm³.
Explanation:
Given data:
Radius of ball = 12 cm
Volume of ball = ?
Solution:
We will apply the volume formula of sphere.
V = 4/3 ×π×r³
we know that,
π = 22/7
r = 12 cm
Now we will put the values in formula.
V = 4/3 × 3.14 × (12 cm)³
V = 4/3 × 3.14 ×1728 cm³
V = 7216.5 cm³
Thus, the volume of basketball is 7216.5 cm³.
According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because -
Answers
Answer:
for the force that sent the person forward, there is an equal force pushing back on the skateboard
Desmond wanted to paint his bedroom. He went to the hardware store and was shown a variety of different paint colors from which to pick. Paint is an example of which kind of product, Which is made with chemicals by humans?
Answers
Answer:
led
Explanation:
Paint is kind of synthetic chemical product.
What is paint?Paint is any colored liquid, liquefiable, or solid mastic substance that solidifies after being applied in a thin layer to a substrate.
Pigments, binders, solvents, and additives are the four major components of all paints. Binders work to "bind" the pigments together and create the paint film, while pigments offer color and conceal. Additives are substances that give certain paint features such as mildew resistance, while solvents are liquids that suspend the components and allow you to deposit the paint on the surfaces. All four elements work together to create paint that is tailored to your exact design requirements.
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