Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green
hoped I helped
PLEASE HELP I'M BEING TIMED!! Which type of star system has the most stars?
A. Open Cluster
B. globular cluster
C. Eclipsing binary
D. binary star system
Answer:
Hi! It's B - globular cluster
Answer:
B Globular Cluster
Explanation:
Sorry if I am wrong :)
Balance the Chemical Equations
MgF2 + Li2CO3---> MgCO3 + LiF
Please Help
Answer:
MgF2 + Li2CO3 ---> MgCO3 + 2LiF
Explanation:
Uranium has three common isotopes. If the abundance of 234U is 0.0054%, the abundance of 235U is 0.7204% and the abundance of 238U is 99.2742%, what is the average atomic mass of uranium?
Answer:
237.9 amu
Explanation:
Given data:
Abundance of U-234 = 0.0054 %
Abundance of U-235 = 0.7204%
Abundance of U-238 = 99.2742%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass / 100
Average atomic mass = (0.0054×234)+(0.7204×235) +(99.2742×238) /100
Average atomic mass = 1.2636+ 169.294+ 23627.2596 / 100
Average atomic mass = 23797.8172/ 100
Average atomic mass = 237.9 amu.
Find the number of moles if you have 1.2 x 1048 copper atoms.
Answer:
1.993 × 10^(24) moles
Explanation:
From avogadro's number, we have that;
1 mole of atoms contain 6.022 × 10^(23) atoms
Therefore, 1.2 x 10^(48) atoms of copper will contain;
(1.2 x 10^(48) × 1)/(6.022 × 10^(23)) = 1.993 × 10^(24) moles
How is gamma radiation produced?
Answer:
They are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around black holes. On Earth, gamma waves are generated by nuclear explosions, lightning, and the less dramatic activity of radioactive decay.
What are the principal energy level? And what do they represent?
Answer:
the principal energy level of an electron refers to the shell or orbital in which the electron is located relative to the atoms nucleus. the first element in a period of the periodic table introduces a new principal energy level.
Explanation:
the electrons surrounding an atom are located in region around the nucleus called "energy level".
I really need your guys help, I need to pass.
Answer:
Question 4 is 291.0346
Explanation:
The Princess cruise ship left San Francisco and traveled south for 8 hours at a speed of 30mph. What is the velocity of the ship? Round your answer to the hundreths place
Answer:
v = 300 mph due South.
Explanation:
Given that,
The Princess cruise ship left San Francisco and traveled south for 8 hours at a speed of 30mph.
We need to find the velocity of the ship. It can be calculated by total distance divided by total time taken.
Velocity is a vector quantity i.e. it has both magnitude and direction. On the other hand, the speed has only magnitude (scalar quantity).
In this case it is mentioned that the cruise is travelling south with a speed of 300 mph.
Hence, the velocity is 300 mph in South direction.
A bicyclist has a mass of 112 kg. In which of the following situations will the cyclist have the most kinetic energy?
A) 10 km / hr.
B) 12 km/hr
C) 14 km / hr
D) 16 km/hr
Answer:
D) 16 km/hr
Explanation:
When the speed increases, the kinetic energy increases, but the mass never changes.
Answer:
d
Explanation:
what charged particle is produced during ionic bonds
Answer:
An ionic bond is formed by the complete transfer of some electrons from one atom to another. The atom losing one or more electrons becomes a cation or a positively charged ion. The atom gaining one or more electrons becomes an anion which is a negatively charged ion.
PERIODIC TABLE
What element is located at the period 3, group 13?
Answer:
Aluminiun
Explanation:
Have ya helped anybody out today, how? And good job!
Answer:
I helped take care of my baby cousin :)
Explanation:
do activity for brainiest:)
Which HTML tag is used to create a heading on a web page? (5 points)
HTML headings are defined with the <h1> to <h6> tags. <h1> defines the most important heading.
hope this helps ^^
how can a substance stay at a certain temperature even though it is being heated?
27. How was the design of the Chernobyl plant different than most modern reactors?
a. The containment building had a dome shape to minimize impact of explosion.
b. The plant was built close to a river to have a constant supply of fresh water.
c. Graphite was used instead of water as a moderator solution in the reactor.
d. The plant design was not significantly different than other reactors.
Answer:
I think its C
Im not sure tho hehe
ITEM BANK: Move to Bottom
Balance
Measured in Newtons
Measured in grams
Property of matter
Spring Scale
Weight
Both
Mass
Cugan 100
drag and drohte
Answer:
The scale reads the tension in the string. The tension in the string is 100 N. This is the force the string must exert up on either of the 100-N weights at either end of the string.
Nothing is moving, nothing is accelerating, so the net force on the spring is zero. Likewise, the net force on either of the 100-N weights is also zero. But that is another question. The spring scale does not measure the net force. The spring scale simply measures the tension, the magnitude of the force exerted by the string.
Explanation:
What is the proper value for F in the above table? A. 28 B. 30 C. 2+ D. 2-
Explanation:
charge = proton - electron
charge = 65-63
charge = +2
Answer:here is ur answer....
Explanation:
C) 2+
Please help!!! I'll give brainliest to the most helpful answer
please this is due today and I have no idea :// 3
Predict the balanced product for the acid base reaction of phosphoric acid with ammonium hydroxide.
Answer:
htt ps://w ww.you tube. com/watch?v =oyy377 Yoj4I
Explanation:
Question 10
Which of the following is a sign that you might be in an extremely unsafe situation?
A) you see frayed electrical cords on the machine you are asked to use
B) other workers are getting burned on the fryer that you are supposed to use
C) you are shown a forklift truck - something you have never operated before -
and told to move a heavy load of materials across the warehouse floor
D) only a) and c)
E) all of a), b), and c)
Answer:
Here it would be A,B and C because all the examples are violating safety precautions. They are all examples of un safe signs.
Hope this helps
Explanation:
The prefix "semi-" means "partly". Based on your knowledge of the properties of elements, which kind of element is most likely used to make semiconductors?
liquids
metalloids
metals
nonmetals
Answer:
metalloids
Explanation:
The kind of element most likely used to make semiconductors are the metalloids.
These elements have properties between those of metals and non-metals in that they are not truly metals and are partly non-metals.
Under certain conditions they show features of metals or non - metals. The class of these elements are the metalloids. They are used to make semiconductors which are major components of electronics.
What type of reaction is this:
C + 02 --> CO2
Answer:
synthesis reaction
Explanation:
A + X --> AX
Answer:
Combustion reaction
Explanation:
How did chemists change Mendeleev's periodic table in the early 1900s?
Answer:
They used atomic number instead of atomic mass to organize the elements. From an element's location in the periodic table, you can predict: ... The elements have similar properties.
HELP!!! 2Mg+O2->2MgO
What are the products of this reaction??
WILL GIVE BRAINLEST
Answer:
the products which is formed in the given reaction is MgO ( magnesium oxide )
Explanation:
when magnesium metal reacts with oxygen present in air it burns with a white dazzling flame
to form white powder of magnesium oxide (MgO)
here's the balanced chemical reaction for it
2Mg+O2->2MgO
Someone help please!!!
1. Which term best describes ultraviolet radiation?
a. Harmless
b. Invisible
c. Undetectable d. Beneficial
What are two uses of sulfur?
Answer:
It's used in the vulcanisation of black rubber, as a fungicide and in black gunpowder and a production of sulfuric acid.
Explanation:
How many molecules are in 50.00 grams of sucrose, C12H22O11
Answer: Well take this for an example and see if it helps with 50 grams of sucrose
Explanation:
Explanation:
And we have to calculate the number of moles of sucrose present in a
lb
mass of sucrose:
Moles of sucrose
=
454
⋅
g
342.30
⋅
g
⋅
m
o
l
−
1
=
1.33
⋅
m
o
l
.
Now it is a fact that in a
mole
of stuff there are
6.022
×
10
23
individual items of stuff.........
So
1.33
⋅
m
o
l
×
6.022
×
10
23
⋅
m
o
l
−
1
≅
8
×
10
23
individual
sucrose molecules
Which of the following could be the speed of an object at rest?
0 m/s
-4 m/s
20 m/s
1 m/s
Answer:
0 m/s
Explanation:
An object at rest stays at rest unless acted upon therefore it can only be 0.
