Answer:
adding 3 tbsp. of salt should be about enough to make the egg float.
Explanation:
The density of the average egg will be slightly greater than that of water, so it will sink. To make the egg float, we have to make the water more dense by adding salt. For 1 cup of water.
What mass of sodium hydroxide is needed to make 0.500 L of 2.50 M NaOH ?
Answer:
50 g NaOH
General Formulas and Concepts:
Chemistry - Solutions
Reading a Periodic TableUsing Dimensional AnalysisMolarity = moles of solute / liters of solutionExplanation:
Step 1: Define
0.500 L
2.50 M NaOH
x moles of solute
Step 2: Define conversions
Molar Mass of Na - 22.99 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of NaOH - 22.99 + 16.00 + 1.01 = 40 g/mol
Step 3: Find moles of solute
2.50 M NaOH = x moles NaOH / 0.500 L
x = 1.25 moles NaOH
Step 4: Convert
[tex]1.25 \ mol \ NaOH(\frac{40 \ g \ NaOH}{1 \ mol \ NaOH} )[/tex] = 50 g NaOH
Step 5: Check
We are given 3 sig figs. Since our final answer has 2 sigs, there is no need to round.
14. How do mushrooms create their
own microclimates?
what is the amount of matter in an object.
A mass
B volume
C Density
Answer:
Option A
Explanation:
The answer is "mass" or option A. It's not option B because volume is the amount of space in a object which is not what the question is asking for. It's also not option C because density goes hand in hand with volume measuring how much space a object takes up, and also density is mass per volume. Leaving only option A, therefore it is your answer.
Hope this helps.
What does the size of the atom & their electron structure (called electron configuration) determine?
Answer:
In atomic physics and quantum chemistry, the electron configuration is the arrangement of electrons in an atom, molecule, or other physical structure (e.g., a crystal). ... The concept is also useful for describing the chemical bonds that hold atoms together.
Explanation:
hope this helps :)
According to the picture above, which layer contains :
Answer:
a) layer 4
b) layer 1
Explanation:
Older the layer=older the fossils
Newer the layer=newer the fossilss
Can someone help me with this, I feel so sleepy right now :(
Answer:
I AM SLEEPY TOO WILL HELP TOMMOROW!
Explanation:
ILL GIVE BRAINLIST IF YOU GET IT RIGHT Which of the following is an example of gravitational potential energy?
Question 9 options:
A battery powering a radio
A flag waving in the wind
A glass jar sitting on a shelf
A ball rolling along a sidewalk
Stoichiometry: Calculate the moles of H2 produced by .042 g Mg in the equation Mg + 2HCl > MgCl2 + H2
Answer:
Mg (s) + 2HCI2 (aq) → MgCI2 (aq) + H2 (g)
I think this is the correct answer I not a 100% sure if it is correct.
Explanation:
Guessing
How did you get the light to shine? in science
Answer:
by using a lemon as a circuit and two positive and negative wires
Which action causes breakers?
Answer:
hope it helps..
Explanation:
The answer is when the waves meet the shore and cause the crest to spill over the trough. This activity creates a back and forth movement of the sand which causes them to settle at a certain area under below the water.
what is magnesium? why does your body need it? how much do you need (per day)? What happens if you have too much or too little of it? Which foods do you find in it? What are some facts about magnesium?
Magnesium is a nutrient that the body needs to stay healthy. if you dont get enough magnesium in your body then you could get magnesium deficiency. Symptoms of magnesium deficiency include loss of appetite, nausea, vomiting, fatigue, and weakness. Extreme magnesium deficiency can cause numbness, tingling, muscle cramps, seizures, personality changes, and an abnormal heart rhythm. The RDA for magnesium is 310–420 mg for adults depending on age and gender. Sources of magnesium are greens, nuts, seeds, dry beans, whole grains and low-fat dairy products.
random facts:
A magnesium ion is present in the chlorophyll molecule of every living green plant.
Magnesium is critically important for the human metabolic system's functioning.
The given diagram shows the structure of an electrolytic cell.
Ella wants to construct an electrolytic cell using equipments found at home.
Give examples of materials (found at home )she can use for :
1. Anode (+Ve)
2. Cathode (-Ve)
3. Electrolyte ( Ella plans to use salty water. Will it work ? )
4. External Circuit (Battery) How powerful must it be
5.Bulb ( What kind ?)
Answer:
1. she requires the anode and cathode
3. the electrolyte : the increase amount of salty water she uses will determine the transfer in of electron needed to power the bulb
4. the battery she uses must be able to power a torch
5. the bulb could be a torch bulb or a bulb lesser than 25 watts
Adenosine triphosphate is the:
A. energy molecule
B. mitochondria
C. cellular respiration
D. chloroplast
Answer:
A
Explanation:
It is the energy molecule.
The mass of Carbon is 12 g/mol and the mass of oxygen is 16 g/mol. What is the approximate percent composition by mass of CO2 (formula mass = 44)?
20% carbon and 80% oxygen
23% carbon and 77% oxygen
25% carbon and 75% oxygen
27% carbon and 73% oxygen
Answer:
the last one
27% by 73%
Explanation:
12/44*100 for C
and
16/44*100 for O
Which molecule contains only single covalent bonds?
A CL
B CO2
C CN2
D 02
CO2 i think if you understand so mark me as brainliest please.
Answer:
a
Explanation:
because that is a clorune that compose of a single covalent bonds
Calculate the mass of 120cc of nitrogen gas at ntp.How many number of molecules are present in it.Easy step of mole concept
Explanation:
The formula of nitrogen gas is given as;
N₂
Given volume of the gas = 120cm³
Now,
We need to find the number of molecules and the mass of this compound
Solution:
At STP;
1 mole of gas occupies a volume of 1dm³ ;
1000cm³ = 1dm³
120cm³ gives 0.12dm³;
Now;
1dm ³ of gas contains 1 mole of substance at STP
0.12dm³ will contain 0.12mole of nitrogen gas at STP
Mass of N₂ gas = number of moles x molar mass of N₂
Molar mass of N₂ = 2(14) = 28g/mol
Mass of N₂ = 0.12 x 28 = 3.36g
1 mole of a substance contains 6.02 x 10²³ molecules
0.12 mole of N₂ will contain 0.12 x 6.02 x 10²³ = 7.22 x 10²²molecules
2 C6H12O2 + 6 O2 -
C =
H =
O =
Answer:
Explanation:
2 C6H12O2 + 6 O2 -
C = 12
H = 24
O = 16
The chemical equation below shows the reaction of methane (CH4) and oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O).
Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?
Answer:
5
Explanation:
took test edge 2020
D. 5
got it correct on test <3
how is the atomic radius calculated?
Explanation:
Divide the distance between the nuclei of the atoms by two if the bond is covalent
Which of the following is NOT an element? Nickel Potassium Carbon dioxide Aluminum
Answer:
carbon dioxide
Explanation:
carbon dioxide is a compound
WHY IS A CREEP(creep as the science def) HARD TO DETECT ?( please need help to answer this question!!)
Answer:
Creep is the imperceptibly slow, steady, downward movement of slope-forming soil or rock. Movement is caused by shear stress sufficient to produce permanent deformation, but too small to produce shear failure. ... Continuous, where shear stress continuously exceeds the strength of the material.
Explanation:
What would the name be for Lead (Pb) and Phosphorus (P) bonded together?
Answer:
Lead Phosphate
Explanation:
Plz help!
It takes a car going 40 mph 3 seconds to come to a stop. What is the acceleration?
is titanium softer than gold i need this ASAPPPP
Plz help!
It takes a car going 40 mph 3 seconds to come to a stop. What is the acceleration?
Answer:
6 second???
Explanation:
Im so sorry if thats wrong!!!!
Which traits are polygenic? Select three options.
Answer:
is there an answier choice u have to choose from or no
Explanation:
Answer:
Hair color
Eye color
Birth weight
Explanation:
what is diffusion and what is osmosis ?
Answer:
diffusion is the movement of gases from a higher concentration area to a lower concentration area
osmosis is the movement of water molecules from a higher concentration area to a lower concentration area
Pure water boils at 100°C.
What happens to the water particles when water boils?
A They gain energy and move further apart.
B They gain energy and stay close together.
CThey lose energy and move further apart.
DThey lose energy and stay close together.
choose one answer correctly!
The boiling of pure water has been resulted in the particles gaining energy and moving away from each other. Thus, option A is correct.
The boiling can be described as the conversion of the liquid state to the gaseous state. The molecules in the gaseous space are apart from each other and have no fixed shape.
The pure water has been transferred to the gaseous state at the temperature of 100 degrees celsius. The boiling has been introduced with the addition of the energy.
The water molecules gain energy and start to vibrate. The vibrations have resulted in the change in the change in phase of the liquid with evaporation.
Thus, when pure water boils, the water particles gain energy and move away from each other. Thus option A is correct.
For more information about boiling pure water, refer to the link:
https://brainly.com/question/11372663
Would rust be considered a chemical or physical change? (I know the answer) Answer this first, and you will receive 20pts regardless, and will receive the "Most Brainiest." (I'm just testing you). I will correct any wrong answers. Any answer afterwards, will be for fun. :)
Answer:
pretty sure it's chemical
Answer:
Its a chemical
Explanation: