Answer:
Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea.
how many moles of oxygen are in 20 grams of oxygen
Answer:
0.625
Explanation:
If you are referring the O2, first you need to get the relative mass of it. You can see the O's is around 16. but this is O2,you need to multiple it.
16×2=32
We get the equation n=m/M where m is for gram
20/32=0.625mol
diagram of paper chromatography from a chemistry textbook
How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?
А. the value of q is negative
B. the value of q is positive
C. the value of q remains constant OD. the value of a decreases
E. the value of q equals zero
Answer:
the value of q is negative
Which among the following is not present in pure sugar ?
[A] Carbon
[B] Hydrogen
[C] Nitrogen
[D] Oxygen
Answer:
Nitrogen
Explanation:
Pure sugar is sucrose C12H22011
how does the body and brain react when u are developing feelings for someobody?
what type of bond is between H2?
Explanation:
covalent bond enjoy your anseer
What do you already know about throwing a curveball?
Answer: You have to have good mechanics as well as the curve with velocity and speed.
The MLB Pitchers you see can be an example.
Commentators yelling Nasty Curveball, Strikeout!!
what is the unique characterization of a ph buffer?
examples of physical properties.
Answer: Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.
Explanation:
how many ounces in a small can of crushed pineapple?
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Crushed Pineapple in 100% Pineapple Juice 8 oz can.Hope it helps!
Brainliest pls!
Follow me! ;)
Why must you continue to increase the temperature as you perform distillation ?
Answer:
It is possible to separate several distinct compounds according to their varying volatilities by altering the temperature of the distillation process. A nonvolatile solute, on the other hand, will always remain in the solution if you have a nonvolatile solute in your solution.
Explanation:
Hope it helps:)
Answer:
The reason for this is that the composition of the vapor that is distilling varies continuously during the distillation
What is defined as the amount of water vapor in the air?
Answer:
It is called absolute humidity.
Explanation:
1. Calculate the grams of solute contained in 450. mL of a 0.075 M solution of CuCl2.
Answer:
4.6 grams CuCl2
Explanation:
Since molarity is a representation of moles per liter, we first want to convert 450. mL to liters:
450. mL * 1 L/1000 mL = 0.450 L
Now, we can use this number and the molarity to figure out the answer:
0.075 M means that for every liter, there is 0.075 moles of CuCl2. Thus, we can multiply the amount of moles per liter by the number of liters of solution.
0.075 moles/1 L * 0.450 L = 0.03375 moles
Then, we need to round this to the appropriate number of significant figures, which gives us:
0.034 moles CuCl2
Next, we can find the grams of CuCl2. To do this, we first need to find the molar mass of CuCl2. The molar mass of Cu is 63.546 g/mol and the molar mass of Cl is 35.453 g/mol, so the molar mass of CuCl2 is as follows:
(1 Cu * 63.546) + (2 Cl * 35.453) = 134.45 g/mol CuCl2
Now, we can multiply the grams per mole by the number of moles of CuCl2 in our solution:
134.45 g/mol * 0.034 moles = 4.5713 grams = 4.6 grams CuCl2, rounded to the appropriate significant figures.
please help me with this question as it's really important
Answer:
(i)
A → CH3CH2CH3 ( Propane )
B → CH3CH(Cl)CH3 ( 2-Chloropropane )
C → No product
D→ CH3CH=CH2 ( 2-propene )
E → CH3CH2COOH ( Propanoic acid )
(ii)
Reagent X → Acidified water [ H+ / H2O ]
Reagent Y → Bromine with Carbon tetrachloride [ Br2 / CCl4 ]
Reagent Z → Sodium hydroxide [NaOH]
Which piece of information could a person obtain from a contour map?
1.
the mineral composition of a mountain
2.
the elevation of a mountain
3.
the speed of water flow in a river
4.
the amount of water in a river
Answer:
2. The elevation of a mountain.
Explanation:
Contour maps are only used for elevation
Which type of electromagnetic radiation had a lower frequency than infrared radiation
Answer:
Radio waves
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
what do you mean by decimal number system
please give answer
Part C
Next Emmerson pours dark blue–colored water on the soil around the well. The pictures show how his model looked over time. What do you observe?
Answer:
I obseve that the water is turnign a little green in the begining but when the water hit the gravel and dirt it became realy blue
Explanation:
Mark brainliest idc
Answer:
I observe that the water started off by turning green and the higher the water went the more blue it had gotten.
Explanation: lazy answer but if you want an answer here you go:)
Question 2 (5 points)
(04.01 LC)
Look at the chemical equation:
2H2S + 302 - 2H2O + 2502
How many atoms of hydrogen (H) are present on both sides of the equation? (5 points)
a
2.
Ob
3
Ос
4
Od 6
Answer:
4 atoms
Explanation:
I hope it helps you!
what is electromagnetisim
Answer:
science of electromagnetic fields
Explanation:
(winks and runs off)
. Identify molecules of elements;
O2, NH3, He
Elements can be made of one atom, like He, or be elemental molecules, such as hydrogen (H2), oxygen (O2), chlorine (Cl2), ozone (O3), and sulfur (S8). Atoms are not drawn to scale. Some elements are monatomic, meaning they are made of a single (mon-) atom (-atomic) in their molecular form...
Short definition of potential and kinetic energy in a roller coaster ride.
Potential energy is the energy an object has because of where it is in relation to other objects. Kinetic energy is what makes the object move. Many rides use the transfer of potential energy to kinetic energy to move along the track. Hope this helps!
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?
HELP ITS TIMED AND IM STUCK ONE THIS QUESTION
Answer:
It's gotta be the third answer
Explanation:
Hope this helpped!
Which of the following is/are considered alcohols?
a CH3OH
b CH3CH2OH
C CH3CH2CH2OH
d All of the above
Answer: THE ANSWER IS D
Explanation:
an alcohol is a hydrocarbon chain with an hydroxyl group (OH)
A, B, AND C ARE ALL ALCOHOLS, SO THE ANSWER IS D
An atom, X, contains 16 protons.
Which statement about Z is correct?Explain why.
A) It cannot form an ion.
B) It contains 6 electrons in the outer shell.
C) It contains 6 neutrons.
D) It had relative atomic mass of 16.
Answer:
B
Explanation: as protons no. = electrons no.= atomic number(Z)
Please help , this is due today!!
Answer:
1. weak acid
2. weak base
3. weak acid
4. neutral
5. acidic
6. weak base
Explanation:
You can use a pH level scale like the one I attached, to determine each solution.
how many grams of co are needed to react with fe2o3?
Answer:
419 grams of CO are needed.
Explanation:
Why did me need to have the same molecules in each bottle? and what would have happened if we didn't use the same molecules?
Background info: We learned about molecules and how when a object is heated the air becomes less dense and the molecules is the opposite since they don't spread out and become more dense. What I mean with this question is in class we experimented by putting a bubble on a bottle and putting it on a hot water, the water made the molecules inside less dense and the bubble went up but when we tried cold water the bubble went down.
Answer:
it's just like doing a test grade on children if you give them different tests they might not come up with the same results, the molecules need to be the same or else the experiment will be even.
Explanation:
whenever water is hot the molecules will bounce really fast in the bottle, whenever water is cold he will go really slow in the bottle
what does not happen when the temperature is increased ?