Answer:
the correct answer is air.
Answer:
water
Explanation:
the medium an electromagnetic wave travel the fastest is in water
3
Which two elements are the most abundant in the Earth's crust?
OA. iron and magnesium
B. iron and nickel
Oc. silicon and magnesium
OD. silicon and oxygen
Novomatlan
Yes
Answer:
Look at the properties of Oxygen and Silicon - the two most abundant elements in the Earth's crust - by clicking on their symbols on the Periodic Table.
Explanation:
Answer:
D. silicon and oxygen
Explanation:
The most abundant elements on the earth's crust are silicon and oxygen. Silicon and oxygen forms a wide range of silicate minerals they are found in the crust.
There are many silicates which are derived from the basal units of silicon and oxygen combining together. Other atoms or elements then combines with the silicate framework.
Oxygen is about 46% abundant in the crust whereas silicon takes about 28% to be the second most abundant element on the crust.
Silicate minerals abounds in rocks and within the soil.
3. All the deer in Horry County represent which of the following?
species
biome
population
community
Answer:
community
Explanation:
Answer:
The correct answer is population. I took the test and got it right.
what is the mass of 5.8 moles of H2S
Answer:
Mass = 197.78 g
Explanation:
Given data:
Number of moles = 5.8 mol
Mass of H₂S = ?
Solution:
Formula:
Mass = number of moles × molar mass
molar mass of H₂S = 34.1 g/mol
by putting values,
Mass = 5.8 mol × 34.1 g/mol
Mass = 197.78 g
Thus, 5.8 moles of H₂S have 197.78 g mass.
What is the charge of an electron?
A-negative
B-neutral
C-positive
D-none of these
What is the percent yield of this reaction if 22.o g of Mgl2 is produced by the reaction of 25.0 g of Mg with 25.0 g of l2?
% yield = 80.719
Further explanationGiven
22.0 g of Mgl₂
25.0 g of Mg
25.0 g of l₂
Required
The percent yield
Solution
Reaction
Mg + I₂⇒ MgI₂
mol Mg = 25 g : 24.305 g/mol = 1.029
mol I₂ = 25 g : 253.809 g/mol = 0.098
Limiting reactant = I₂
Excess reactant = Mg
mol MgI₂ based on I₂, so mol MgI₂ = 0.098
Mass MgI₂ (theoretical):
= mol x MW
= 0.098 x 278.114
= 27.255 g
% yield = (actual/theoretical) x 100%
% yield = (22 / 27.255) x 100%
% yield = 80.719
Which of the following is true about homogeneous mixtures?
They consist of two or more phases; They are always liquids; They are known as solutions; They have compositions that never vary
Answer:
Option 3: They are known as solutions
Explanation:
Examples of homogenous mixtures include:
soapy watertea or coffee that's breweda mixture of water and alcoholbloodairquartznitrogenI hope this helps :)
Which instrument is used to measure mass?
Answer:
Balance
Explanation:
hope i helped
True or false for these!!!! Please help
The combination of all the forces on an object is called?
Answer:
net force
Explanation:
The roots of a plant help to anchor the plant to soil, and are also used for food storage and water extraction. Roots are made up of tissues, such as xylem, Phloem, and pith. In which level of organization would the roots of a plant most likely be classified?
Answer;
Cells, Organism.
Explanation:
Roots are made up of tissues, such as xylem, phloem, and pith. In which level of organization would the roots of a plant most likely be classified as?
10
If velocity is positive, which would most likely yield a negative acceleration?
O O OO
A final velocity that is faster than an initial velocity.
A time that is less than a half hour.
An initial velocity that is faster than a final velocity.
A time that is greater than a half hour.
Answer:
An initial velocity that is faster than a final velocity
Explanation:
The relationship between velocity and acceleration is given as follow;
Acceleration = Change in velocity / Time
Change in Velocity = Final Velocity - Initial Velocity
From the formular, time is not able to affect the sign of the acceleration.
A negative acceleration is also referred to as deceleration and this occurs when there is a drop in velocity.
A drop in velocity occurs when the initial velocity is faster than the final velocity.
The nucleus of a fluorine atom has a charge of?
A. +19
B. 0
C. +9
D. +1
Answer: B
Explanation: A fluorine atom has nine protons and nine electrons, so it is electrically neutral. (neutral =0)
The nucleus of a fluorine atom has a charge of zero as the atom has equal number of positive and negative charges.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
Learn more about atom,here:
https://brainly.com/question/29695801
#SPJ6
How do I balance "Lithium hydroxide + hydrogen acetate --> lithium acetate + water"
Answer:
LiOH+CH3COOH=C2H3LiO2+H2O balanced equation
Explanation:
lithium hydroxide-> LiOH
hydrogen acetate->CH3COOH
lithium acetate->C2H3LiO2
water->H2O
LiOH+CH3COOH=C2H3LiO2+H2O
Li=1,O=3,H=5,C=2 --> Li=1,O=3,H=5,C=2
the two sides have same numbers so it is balanced.
Breathe.
You are going to be okay.
Breathe and remember that you've been in this place before. You've been this anxious and scared... and YOU'VE SURVIVED.
Breathe and know that you can survive this too. These feeling can't break you.
They're painful and debilitating, but you can sit with them and eventually... they WILL pass.
Maybe not immediately, but sometimes soon, they are going to fade, and when they do, you'll look back at this moment and laugh for having doubted your resilience. I know it feels unbearable right now, but keep breathing, again and again. THIS WILL PASS.
Answer:
thank you so much i really needed that
Explanation:
How many gallons of water would be in a container that is 256 millimeters X 20 inches X.045 meter.
How many molecules of water of water are in a 821.3 g sample
Answer: 2.744 x 1025 molecules
E. What is one way that your body knows if it is upside-down or not?
Answer:
You get some type of pressure that you start to feel in your muscles and joints from gravity and movement. How do they say it? Something called "seat-of-the-pants" (something like that). You get some type of pressure, and your body senses it, and it knows when you are upside-down or not, because if you're not, then you won't get any pressure in your muscle.
Hope this helped!
Have a supercalifragilisticexpialidocious day!
please help i will mark brainlist
Answer:
432cm³
Explanation:
Given parameters:
Length = 12cm
Height = 6cm
Width = 6cm
Unknown:
V = ?
Solution:
We have been given that;
V = L x W x H
So;
V = 12cm x 6cm x 6cm = 432cm³
What might the student have done that caused this
error? List all possible causes.
Answer:
The capillary tube was too close to the bottom of the beaker.
The ruler may have moved.
Water got into the capillary tube.
The temperature was not allowed to equilibrate in the 2-4 minutes.
Explanation:
How many molecules are in 2.91 X 1022 atoms of He
Answer:
Explanation:
1 mole of oranges contains 6.02 x1023 oranges. 1 mole of helium gas contains 6.02 x1023 helium atoms. 1 mole of water contains 6.02 x1023 water molecules.
...
Answer:
25194.56
Explanation:
You'll need a scientifuc calculator
2.91*10^22*1 = 2.91E22
2.91E22-/6.02*10^23=25194.56
6.02*10^22 Is the Mole number
The mass of the nails and copper sulfate solution used in this investigation was 250g The mass of the copper and tran sulfate solution produced in this
nvestigation would be
250g
Answer:
He it would because 250g is the answer is to 256g
Explanation:
Consider the double replacement reaction given below: HgNO3(aq) + KBr(aq) → HgBr (??) + KNO3(??)The state of matter for HgBr would be
Answer: The state of maater for HgBr is solid.
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The balanced chemical equation is:
[tex]HgNO_3(aq)+KBr(aq)\rightarrow HgBr(s)+KNO_3(aq)[/tex]
why are properties of covalent compounds so diverse
Answer:
The diversity of physical properties among covalent compounds is mainly because of widely varying intermolecular attractions. ... All of the atoms are covalently bonded to each other.
Can y’all answer these for me I’m in a hurry so I don’t fail this class
Answer:
what I can't understand what you're saying lol
Explanation:
be my friend lol
btw follow me on my another account (sarivigakarthi)...... plz
Which of the following empirical formulas is written correctly? *
The phase that occurs beyond the critical point is:
A. Liquid
B. Solid
C. Gas
D. All of the above
Answer:
C. Gas
Explanation:
A supercritical fluid occurs beyond the temperature of critical point, wherein the state matter transitions from liquid to gaseous phase interchangeably. Whereas, triple point occurs when all three states of matter: solid, liquid nd gas; coexist.
Hence the answer to the question is Gaseous phase/
I hope you found this helpful.
25.00 g of the compound is composed of 6.77 g of tin and 18.23 g of bromine. What is the percent by mass of tin in the compound? Show work.
The percent by mass of Tin : = 27.08%
Further explanationGiven
25.00 g of the compound
6.77 g of Tin
18.23 g of Bromine
Required
The percent by mass of Tin
Solution
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
%mass X = (mass X/mass sample) x 100%
So %mass of Tin :
= (6.77 g : 25 g) x 100%
= 27.08%
Explain in terms of intermolecular forces why water has an unusually high heat of fusion?
Answer:
hydrogen bonding among water molecules
Explanation:
Tikiya is conducting experiments on samples of pure copper (Cu). While collecting data, Tikiya records both physical and chemical properties of the metal. Which of the following is dependent on the amount of copper particles in the sample? A. Electrical conductivity B. Thermal conductivity C. Mass D. Density
Answer: Mass
Explanation: I had the same question hope its right for you
PLZ HELP ME IM FAILING!
Everything you need to know about the question is on the photo
Answer:
C. NH₄Cl
Explanation:
The compound with the element ratio 1 : 4 : 1 from the given choices is NH₄Cl.
An element is a pure substance made up of distinct number of atoms. Elements are unique and are different from other elements because of the nature of their atoms.
We often delineate an element using chemical symbols.
In the compound NH₄Cl;
There are 3 elements:
Number of atoms
N 1
H 4
Cl 1
