Answer:
Over ninety percent of all the atoms in the Universe are hydrogen atoms.
Explanation:
Over ninety percent of all the atoms in the Universe are hydrogen atoms. By mass, hydrogen makes up about 75% of all matter in the Universe. Hydrogen atoms are also the smallest and lightest of all the atoms with only one electron and one proton in a common single hydrogen atom (called protium).
What is the melting point of the above substance?
Which of the following are an example of a polysaccharide?
A.starch
B.chitin
C.cellulose
D.sucrose
Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A
Can someone help me find the 5 digits numbers in here?
Answer:
20322
Explanation:
if 11 molecules of monosaccharides with the formula C6H12O6 are assembled to produce a complex carbohydrate, how many atoms of hydrogen be in the final polymer?
You pour some juice from a short, wide glass into a tall, narrow glass. What happens to the volume of the juice? Explain your reasoning.
Answer: the volume increases
Explanation: It increasses because the volume is how tall it is
An atom contains 22 protons and 26 neutrons. What is its atomic number?
Answer:
the atomic number is 22
Explanation:
titanium is 22 on the periodic table. the amount of protons is the same as the atomic number
Answer:
22 :)
Explanation:
A mechanical pencil has a mass of 47.4 grams. The volume of the pencil is 15.8 cubic centimeters. What is the density of the pencil?
Answer:
3 g/cm^3
Explanation:
Density can be determined by mass divided by volume, or P=m/V.
This would be 47.4 grams (mass) / 15.8 cubic centimeters (volume). The units are grams per cubic centimeter, noted as g/cm^3.
Oxygen and silicon makes up what percentage of the Earth crust.
A) 57% B) 98.5% C) 75% D) 50%
answer
the answer is C
explanation
this is because the oxygen makes up 46.1%of the earth's surface while silcon is 28.5% and the question says "what makes up" which means you should add them and it becomes 74.6% which Is approximately 75%
Make a claim about whether air is matter and whether light is matter. Support your claims with evidence and explain your reasoning.
Answer: air is matter, it has mass and it takes up space
Which is more scientific, what is the air made out of? or why is there air?
Answer:
why is there air
Explanation:
it sounds more smarter and sounds like something someone would want to know
PLEASE HELP ASAP How many moles are there in 2.25 x 10^25 atoms of Zinc?
How many atoms are there in 9500.0 mg of Fluorine?
Answer:
There are 6.023 x 10^23 fluorine atoms.
Explanation:
Green light has a frequency of 6.01 x 1024 Hz. What is the wavelength?
Answer:
λ= 4.99 * 10^-17
Explanation:
C= F * λ
F= frequency(Hz)
λ= wavelength(m)
C= 3.0 * 10^8
F= 6.01 * 10^24
λ= ?
3.0 * 10^8= (6.01 * 10^24) λ
***Simplify
λ= 4.99 * 10^-17
is the cause of rapid oxidation explosion
Plz help me complete this table
Answer:
9,19,9,10,9,F
15,29,14,15,14,Si
22,47,22,25,22,Ti
25,55,25,30,25,Mn
35,80,35,45,35,Br
8,16,8,8,8,O
47,108,47,61,47,Ag
16,32,16,16,16,S
82,207,82,125,82,Pb
Explanation:
Atomic number = number of protons = number of electrons
Mass number = number of protons + number of nuetrons
Which of the three sub-atomic particles is the lightest?
a The proton
b The neutron
c The electron
d orbital
Answer:
The electron
Explanation:
The electron will be the lightest subatomic particle.
Answer:
The electron
Explanation:
Electron, lightest stable subatomic particle known. It carries a negative charge, which is considered the basic unit of electric charge. The rest mass of the electron is 9.10938356 × 10 −31 kg, which is only 1/1,836 the mass of a proton.
where are the electrons found in Bohrs atomic model
Answer:
Explanation
In the Bohr model of the atom, electrons travel in defined circular orbits around the nucleus. The orbits are labeled by an integer, the quantum number n. Electrons can jump from one orbit to another by emitting or absorbing energy.
I WILL GIVE YOU BRAINLIEST!!!
Answer:
The second option
Answer:
Intent to cause harm
What is the density of a rectangle solid with dimensions
of 15 cm x 25 cm x 5 cm and has a mass of 3000 g?
Answer:
5625000gm/cm^3
Explanation:
volume=w*h*l=25*15*5=1875cm^3
density=mass*volume
=1875*3000
=5625000gm/cm^3
help me out pls (image attached)
Solution ,colloid ,or suspension
Answer:
colloid
Explanation:
i think she making meth in her basement
2. A substance that is solid, has a shiny orange color, conducts electricity well, and melts
when heated could MOST likely be classified as ?
Answer: Aluminium
Explanation:
The metals are solid substances, they have shiny luster, they conduct electricity and have high melting point. The aluminium is a kind of metal that have a solid surface, it has a shiny luster, the surface of metal appears to be polished. It conducts electricity and can be used in electrical cords, connections, and devices. It has a high melting point.
Which of the following will Float on pure water?
оа
Ob
A substance with a mass of 1.33 g. and a volume of 1.38 ml.
A substance with a mass of 534.23 grams and a volume of 522.3 mL
A substance with a volume of 436.2 mL and a mass of 4180.23 g.
A substance with a volume of 3.35 mL and a mass of 22.64 g.
ос
Od
Answer:
ob
Explanation:
becoz when volume increases density decreases.
Match each element with the element that is most similar to it. If you don’t know the answer, use this periodic table to help you make your best guess.
Drag the tiles to the correct boxes to complete the pairs...
Answer:
Lithium - Potassium
Carbon - Silicon
Fluorine - Bromine
Oxygen - Sulfur
Explanation:
I hope this helps!! :3
A compound is always made up of the same ____ in the same proportions.
Answer:
elements
Explanation:
A compound always consists of the same elements in the same ratio. If the same elements combine in different ratios, they form different compounds
which can occur in a physical changen?
How many moles of titanium are there in 32.5 grams of titanium?
Answer:
0.159 moles of Ti
Explanation:
32.5 g of Ti x (1 mol of Ti / 204.4 g of Ti) = 0.159 moles of Ti
Predict the charge on the monatomic ions formed from the following atoms in binary ionic compounds:
(a) I
(b) Sr
(c) K
(d) N
(e) S
(f) In
How cations can become neutral atoms?
Answer:
By gaining elections
Explanation:
Cations are formed when neutral atoms loss electrons and when they gain back the lost electrons the charges are neutralized.
Eg. Cu=Cu2+ + 2é
Cu2+ + 2é=Cu
Find the mass of a 50.0 ml quantity of water if the density of water is 3.25 10 poin g/ml * O 15.38 g O 162.5 g 0.0659 O 124.3g What is an extensive property? * 10 poli
A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock by placing the rock in a graduated cylinder with 50 mL of water and watched the water rise to 72.7 mL. The student determined the mass is 39.943 g through the use of a triple beam balance. What is the density of the rock?
Answer:
1.76 g/mL
Explanation:
You need to find the volume. You can do this by subtracting the volume of the water and the rock by the volume of the water.
72.7 mL - 50 mL = 22.7 mL
Now that you have volume, divide the mass by the volume to find the density.
39.943 g/22.7 mL = 1.76 g/mL
