Answer:(b)liquid water is correct option . Because it is a molecular solid and molecular solid has weak interparticle forces of attraction
Explanation:
HELLPP ASAP, FIRST PERSON WITH THE CORRECT ANSWER WILL RECEIVE BRAINLIEST
How are the number of valence electrons and the types of ions related?
Answer:
"The number of electrons in an atom's outermost valence shell governs its bonding behaviour."
Explanation:
Credits to:
https://socratic.org/questions/how-do-valence-electrons-affect-chemical-bonding
Make sure to put in your own words
Hopefully this helps
Answer:
The number of electrons in an atom's outermost valence shell governs its bonding behaviour. ... They need to lose only one or two valence electrons to form positive ions with an s²p⁶ configuration. NONMETALS. Nonmetals tend to attract additional valence electrons to form either ionic or covalent bonds.
2. Calculate the density of a metal that occupies 17.75 cm and has a mass of 342.93 g. [D = m/V]
Answer:
19.32
Explanation:
the density is given by the mass over volume
the mass In this case is 342.93 and the volume is 17.75
d=342.93g/17.75cm
=19.32g/cm
i hope this helps
Need help :)….please
Answer:
i think B is correct
Explanation:
I'm a hot 15yo boy hml
Answer:
great
On a scale of 1-10 I give you a 10
Explanation:
what about brainliest
Answer: I agree 100%
Explanation: But you may be too hot for me lol.
how do i know if a salt is insouble or soluble?
[preparations of salts]
Answer:
by the expirement:
In which mix salt with water
If an atom has three shell and number of valence electrons are two. Is this element metal
or non-metal and why? Name the element and it’s valency.
Answer:
Metal
Element: Calcium
Valency: 2
Explanation:
To find the element, let's use the periodic table. (Look below)
We already went past 3 shells, just need the 2 electrons after it.
Just skip to the 4th row and count 2 to the right
We end up at Calcium.
Calcium is a metal and we're also on the alkaline earth metals column.
Calcium will need to lose 2 electrons to reach stability, so the valency is 2.
1.Which of the following forms only Ionic Bond?
1)Ca 2)C 3)Si 4)P
2.How many atoms of Na are present in 92 a.m.u of it?
a)4 b)5 c)6 d)7
The Answer is A)4 atoms of NA are present in 92 a.m.u
_____ A molecule is the smallest part of
A an element
B a compound
C a substance
D an atom
Answer:
B.a molecule is the smallest part of a compound
Answer:
substance
Explanation:
Does the following statement describe a theory, law or both?
“Accepted as true by scientists”
A) BOTH THEORY AND LAW
B) LAW
C) THEORY
Statement describe both theory and law .
Environmental scientists are unconcerned with methods to preserve natural resources.
Please select the best answer from the choices provided
T
F
Answer:
False
Explanation:
two easy uses of mixture
Explanation:
it helps to make juices.
It helps to make concentrated acid into dilute acid.
Answer:
Explanation:
Here are a few more examples:
1. Smoke and fog (Smog)
2. Dirt and water (Mud)
Which level of organization is formed when a group of organs work together to perform complex functions?
Answer:
an organ system is formed when a group of organs works together to perform complex functions. it is composed of two or more tissue types and performs a specific set of tasks for the body
Which statement is true?
A.
Molar concentration is proportional to the temperature of a reaction.
B
Molar concentration is proportional to the change in the number of moles in a reaction.
c.
Molar concentration is proportional to the partial pressure of a gaseous system.
D
Molar concentration is proportional to the volume of a system.
Answer:
I'm not really sure. but I think is D
Answer: B, Molar concentration is proportional to the change in the number of moles in a reaction
Explanation: took the test on plato
What are easy ways to
Study Chemistry ??
Answer:
seneca
past papers
take notes from videos
Explanation:
very good website, asks questions about the subject correct for your exam board and gives correct answers and explanations
exam papers always help
5+64
this is TOTALLY SOOOO hard so help me
^thats what she said
Answer:
69
Explanation:
I thought that I answer is correct
Answer:
The answer is 69
Explanation:
Because if you add one its 66, and so on, hope this helps! but if you add five it will be 69, if you need help with easy equations let me know
Match each step of the scientific method with its matching example.
Match Term Definition
A) The growth of green algae is recorded every day for several weeks and compared
B) The data recorded in the experiment supports the hypothesis about how algae reproduce.
C) Based on what other scientists have done, algae life cycles are affected by light.
D) Under the same temperature and water conditions, green algae is grown under natural light, blue light, and green light.
Experiment
Conclusion
Research
Analysis
Answer: I did the quiz and got it correct
Explanation:
Biosphere- B
Ecosystem- C
Biome- D
Habitat- A
Scientific Method
What is Scientific Method
A method or procedure that consists of systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
Experiment- The growth of green algae is recorded every day for several weeks and compared
Conclusion- Under the same temperature and water conditions, green algae is grown under natural light, blue light, and green light.
Research-Based on what other scientists have done, algae life cycles are affected by light.
Analysis- The data recorded in the experiment supports the hypothesis about how algae reproduce.
For more information visit
https://brainly.com/question/497944
If the magnet loses its superconducting properties, all of the liquid helium could suddenly turn to a gas. If an MRI machine contains 1950 L liquid He with a density of 0.125g/mL, how many liters of He gas would be formed at 25°C and 1 atm? Use the ideal gas law. Round your final answer to two significant figures. Show your work. (4 points)
Answer:
Determine the volume of helium gas
Answer:
About 1,495 Liters of Helium.
Explanation:
To calculate the volume of helium gas formed when the magnet loses its superconducting properties, we can use the ideal gas law:
PV = nRT
Where:
P = Pressure (in atm)
V = Volume (in liters)
n = Number of moles of helium gas
R = Ideal gas constant (0.0821 L.atm/(mol.K))
T = Temperature (in Kelvin)
First, we need to find the number of moles of helium gas:
Given volume of liquid helium (V_liquid) = 1950 L
Density of liquid helium (ρ) = 0.125 g/mL = 0.125 g/cm³
To convert density from g/cm³ to g/L, we multiply by 1000:
Density of liquid helium (ρ) = 0.125 g/cm³ * 1000 cm³/L = 125 g/L
Mass of liquid helium (m) = Volume * Density = 1950 L * 125 g/L = 243,750 g
Next, we need to convert the mass of liquid helium to moles using the molar mass of helium:
Molar mass of helium (M) = 4.0026 g/mol
Number of moles (n) = Mass / Molar mass = 243,750 g / 4.0026 g/mol ≈ 60,907 mol
Now, we have the number of moles of helium gas (n), and we can calculate the volume of helium gas (V_gas) at 25°C (298.15 K) and 1 atm:
P = 1 atm
T = 25°C = 298.15 K
V_gas = nRT / P
V_gas = (60,907 mol) * (0.0821 L.atm/(mol.K)) * (298.15 K) / (1 atm)
V_gas ≈ 1,495 L
Therefore, approximately 1,495 liters of helium gas would be formed at 25°C and 1 atm when the magnet loses its superconducting properties.
If 45.0 g of O2 are mixed with 45.0 g of H2 and the mixture is ignited, what mass of water is produced?
Group of answer choices
45.0 g
50.7 g
79.9 g
25.3 g
90.0 g
Answer:
45.0gExplanation:
hope it will help you
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A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of
the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula
of the compound?
Answer:
pcl3 is the empirical formula of the compound
What is a Difference between absolute temperature and temperature ?
Answer:
Absolute temperature and 100% accurate
Explanation:
Answer:
Absolute temp is measured on a scale in which the hypothetical lowest limit of physical temperatures is assigned the value zero (absolute zero )
Hope this helps <3 Need thanks? Comment /hearthelp
What is the molecular formula?Write down the molecular formula of the given compounds.
i. Calcium Sulphate
ii. Sodium Carbonate
iii. Water
iv. Carbon Dioxide
v. Potassium Nitrate
vi. Ammonium Chloride
Answer:
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule.
The molecular formula of the given compounds are:
CaSO4Na₂CO₃H2OCO2KNO3NH4ClQuestion 5: thanks you
Answer:
A linear molecule has a bond angle of 180°
Classify the crystalline solids
full answer
crystalline solids are the type of solid which have long term arrangement of particle
they have sharp melting and boiling point
Answer:
OMG wow thankyou so so so much for the thanks ( ◜‿◝ )♡
why are structural formulas good for depicting polymers?
Answer:
Structur formulas are good for depicting polymers because they explain the properties and structure of the compound which empirical and molecular formulas cannot always represent.
Hope it helps you.Structural formulas describe the bonds shared by the elemental atom. They are good for depicting polymers as they describe the structure and the properties.
What are polymers?Polymers are said to be substances that are either natural or synthetic and are macromolecules made of various chains of monomers joined together.
The actual structure and arrangement of the atoms in the polymers are depicted by the structural formula. These were not explainable by the empirical, or molecular formulas.
The atoms involved and the linkage between them are described through the structures and allow us to know the certain properties of the monomers involved. It gives the idea of the chemical and physical properties.
Therefore, the structural formulas depict the polymer.
Learn more about polymer, here:
https://brainly.com/question/17638582
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Calculate the weight of CuO formed when 200g of Copper carbonate is heated.(Atomic weight of Copper-64,Carbon-12,Oxygen-16)
Answer:
129 g of CuO
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
CuCO₃ —> CuO + CO₂
Next, we shall determine the mass of CuCO₃ that decomposed and the mass of CuO produced from the balanced equation. This can be obtained as follow:
Molar mass of CuCO₃ = 64 + 12 + (16×3)
= 64 + 13 + 48
= 124 g/mol
Mass of CuCO₃ from the balanced equation = 1 × 124 = 124 g
Molar mass of CuO = 64 + 16
= 80 g/mol
Mass of CuO from the balanced equation = 1 × 80 = 80 g
SUMMARY:
From the balanced equation above,
124 g of CuCO₃ decomposed to produce 80 g of CuO.
Finally, we shall determine the mass of CuO produced by the decomposition of 200 g of CuCO₃. This can be obtained as follow:
From the balanced equation above,
124 g of CuCO₃ decomposed to produce 80 g of CuO.
Therefore, 200 g of CuCO₃ will decompose to produce
= (200 × 80)/124 = 129 g of CuO.
Thus, 129 g of CuO was obtained from the reaction.
A report on the various water conservation methods used by any one
states of India
Answer:
Kuls are diversion channels that carry water from a glacier to village. Often spanning long distances, with some over 10 km long, kuls have been around for centuries. They are the lifeline of people of Spiti valley of Himachal Pradesh and in Jammu too.
Kul starts at the glacier, which is to be tapped. Keeping the head clear of debris is achieved by lining the sides of Kul with stones which ensure that there is no seepage or clogging. The Kul leads to the village where the water is stored in a circular water tank. The water is drawn from here are per the need of the village.
Explanation:
Here is a list of some of the traditional water conservation methods that are still in use:
What is a weak acid?
A. An acid that does not have a conjugate base
B. An acid that does not dissolve completely
C. An acid that has been diluted with water
D. An acid that has a very low pH value
Answer:
B
Explanation:
strong acids ionize completely in water
Answer:
An acid that does not dissolve completely
Explanation:
que chest pain
These may be signs of a serious condition. See your doctor
Ask a doctor before use if you have:
had heartburn over 3 months. This may be a sign of a more serious condition.
sfregent wheezina, particularly with heartbum
unexplained weight loss
Bea or vomiting
stomach pain
Ask a doctor or pharmacist before use if you are taking a prescription drug Acid reducers
may utteract with certain prescription drugs.
Stop use and ask a doctor it:
your heartburn continues or worsens
you need to take this product for more than 14 days
you need to take more than 1 course of treatment every 4 months
w you got diarrhea
you develop a rash or joint pain
I pregnant or breast-teeding, ask a health professional before uso.
Koop out of reach of children. In case of overdose, get medical help or contact a Poison
Control Center night away (1-800-222-1222).
Answer:
.........................okay?
balance this equation
Si Cl4 + H2O → Si (OH4) + HCl
Please give a detailed explanation
Answer:
4HCl + SiO2 → 4H2O + SiCl4
axit clohidric Silic dioxit nước Silic tetraclorua
Axit
Explanation:
Answer:
SiCl4 + 4H2O--->Si(OH4)+4HCl
Explanation:
if you put a 4 in front of H2O it means you will have 8 hydrogens(you multiply 4 by 2) then the oxygens will be 4..on the other side that hydrogen in the brackets holds it's on 4 so that 4 isn't for both the hydrogen and the oxygen...and if you put a 4 in front of the HCl that simply means it's for both the hydrogen and oxygen.
I hope this helps
Can someone help me with this please
Answer:
.00305
Explanation:
There a 7 significant figures in the number because we know that leading zeroes are NOT counted. To round the number to have only 3 significant figures, we will need to round to the 5th decimal place. Remember the basic rules of rounding; 5 and up, round up, 4 and below, round down.
.00305346 → .00305
Best of Luck!
