Answer:
i think it's B sorry if i'm wrong
what is acid? Explain it
Answer:
An acid is a chemical that is posining or sometimes not
Explanation:
This is the best I could explain brainliest
5.(08.02 MC)
A 0.680 M Ca(OH)2 solution was prepared by dissolving 55.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution formed? (4 points)
O 1.09 liters
0 1.23 liters
2.01 liters
O 2.18 liters
Answer: 1.09 Liers
Explanation:
I did the problem and got it correct.
Answer:
A. 1.09
Explanation:
I did the Chemistry Exam
The movement of water from an area of high concentration to one of low concentration through a semipermeable membrane is called ?
ALL THE THINGS YOU SAID ALL THE THINGS YOU SAID RUNING THROUGH MY HEAD RUNNING THROUGH MY HEAD HELPPPP
Answer:
Gamma rays and X-rays
Explanation:
All the things she said
All the things she said
Running through my head
Running through my head
Running through my head
All the things she said
All the things she said
Running through my head
Running through my head
All the things she said
This is not enough
This is not enough
Phenolphthalein meaning
Answer:
Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as "HIn" or "phph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
Answer:
Phenolphthalein is a chemical compound, a colorless crystalline solid, though pink in a alkaline solution, and is also used as an acid-base indicator.
Explanation:
How GM food are produced?
What is genetic modification (GM) of crops and how is it done? GM is a technology that involves inserting DNA into the genome of an organism. To produce a GM plant, new DNA is transferred into plant cells. Usually, the cells are then grown in tissue culture where they develop into plants.
Answer:
GM is a technology that involves inserting DNA into the genome of an organism. To produce a GM plant, new DNA is transferred into plant cells. Usually, the cells are then grown in tissue culture where they develop into plants. The seeds produced by these plants will inherit the new DNA.
HELP PLEASE
1. Locations where volcanoes form far from plate boundaries are called
A. islands
B. hot spots
C. divergent zones
Which of the following phase changes describes what is
happening in the following endothermic process?
H20 (1) + heat --> H2O (g)
O melting
o freezing
o boiling
O condensing
Answer:
I think the answer is boiling
the molar mass of CCI2F2
Answer:
The molar mass and molecular weight of CCI2F2 is 315.8271.
Explanation:
If a sample of a gas occupies 5.22 L at 235 oC, what will its volume be at 75 oC if the pressure remains the same?
Answer:
1618.2
Explanation:
235+75=310×75=1618.2
A metal object with mass of 29.0 g is heated to 97.0 °C and then transferred to an insulated container containing 95.8 g of water at 20.5 °C. The water temperature rises and the temperature of the metal object falls until they both reach the same final temperature of 23.7 °C. What is the specific heat of this metal object? Assume that all the heat lost by the metal object is absorbed by the water.
Answer:
0.603J/g°C is the specific heat of the metal object
Explanation:
To solve this question we must know the heat given by the metal is equal to the heat absorbed by the water. The change in heat follows the equation:
Q = m*S*ΔT
Where Q is heat in Joules, m is the mass of the substance, S its specific heat and ΔT change in temperature
The equation to solve the problem is:
m(Object)*S(Object)*ΔT(Object) = m(Water)*S(Water)*ΔT(Water)
Where:
m(Object) = 29.0g
S(Object) = ??
ΔT(Object) = (97.0°C - 23.7°C = 73.3°C)
m(Water) = 95.8g
S(Water) = 4.184J/g°C
ΔT(Water) = (23.7°C - 20.5°C = 3.2°C)
29.0g*S(Object)*73.3°C = 95.8g*4.184J/g°C*3.2°C
S (Object) * 2125.7g°C = 1282.6J
S(Object) = 0.603J/g°C is the specific heat of the metal object
Which of the following processes
release energy?
A. Water evaporating
B. Ice melting
C. steam condensing
D. wax melting
How many grams of water are produced when 12.50 mol oxygen reacts with hydrogen?
Answer: According to reaction below, when one mol of oxygen reacts with two mol of hydrogen, two mol of water is produced. Thus, when 2.5 mol of oxygen reacted with hydrogen, 2 * 2.5 mol = 5 mol of water is produced. The molar mass of water is 18 g/mol.
Explanation:
Not My WORK! I got this info from another site. BUT I HOPE IT HELPS :)
29.) What charge would you expect from a Group 1 atom when it becomes an ion?
a.) 2-
b.) 2+
c.) 1-
d.) 1+
Answer:
d
Explanation:
It is 1+ because when the periodic table is drawn well into there groups become cations
Balance this chemical equation
Ca(OH)2 + HCl ---> CaCl2 + H2O
Answer:
The balance equation of Ca(OH)2 + HCl ---> CaCl2 + H2O
is
Ca(OH)2(s) + 2HCl(aq) ---> CaCl2(aq) +2H2O (l) (balanced equation)
what is the best definition of energy?
A. The capacity to measure heat.
B. The capacity to measure mass
C. The capacity to exert strength
D. The capacity to do work
Answer:
D. the capacity to do work
Explanation:
the basic definition of energy is the ability to do work
What controls the DNA molecule?
Answer:
nucleotides
Explanation:
The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C). The order, or sequence, of these bases determines what biological instructions are contained in a strand of DNA. ... DNA is made of chemical building blocks called nucleotides.
hope that helped :)
Which layer of the earth is the thinnest and thickest?
Answer:
crust
Discuss with the whole class what the relative thicknesses of the layers are — that the inner core and outer core together form the thickest layer of the Earth and that the crust is by far the thinnest layer.
Explanation:
Discuss with the whole class what the relative thicknesses of the layers are — that the inner core and outer core together form the thickest layer of the Earth and that the crust is by far the thinnest layer.
please mark all that apply!
Answer:
F G there you go the guy on top is right
Explanation:
F G
6 a 100 sample of Au - 198 Au 198 be? Decays to 3.125 g in 13.5 days, what would the half-life of au198 be?
Answer:
Half-life = 2.7 days
Explanation:
The radioactive decay of an isotope follows the equation:
Ln[A] = -kt + ln[A]₀
Where [A] could be taken as the amount of A after t time, k is decay constant, [A]₀ initial amount of A.
Replacing to solve k:
Ln[3.125g] = -k*13.5days + ln[100g]
-3.465736 = -k*13.5days
k = 0.2567days⁻¹
Half-life is:
half-life = ln2 / k
Half-life = 2.7 days
One of your classmates asks you why an ice cube melts in water. Which of the following
would be your best explanation?
a.) The ice cube transfers energy to the air.
b.) The ice cube transfers energy to the water.
c.) Energy is transferred from the ice to the water and from the water to the ice.
d.) The water transfers energy to the ice cube.
Answer:
the answer is B
Explanation:
the ice puts 8ts cold into the water taking it away from the ice
21.) This substance consists of two or more nonmetal elements in a fixed ratio.
a.) element
b.) mixture
c.) molecule
d.) compound
Answer:
Molecule
Explanation:
when two or more than two non-metal elements are combined then it form Molecule.
based on the graph below, which statement
Answer:
4. Atmospheric pressure decreases as altitude increases.
Explanation:
hope this helps and is right. p.s i really need brainliest :)
Is all the biomass consumed by a primary consumer, such as a brine shrimp, transferred to the secondary consumer, such as a gull, when the brine shrimp is eaten? For instance, if a brine shrimp eats 10 g of algae in its life before the gull eats it, does the gull get 10 g of biomass when it eats the brine shrimp? Why or why not?
explain how lithium atom is positive charge
Which process is represented by the label a?
Answer:
Sediment to sedimentary rock (and vice versa) is Compactation and Cementation.
Explanation:
This happens via Lithification, which is the compacting of sediments under pressure.
Lee and some other students working with Dr. Yung were conducting an experiment and ended up with some confusing results. In the experiment, each student combined sodium and hydrogen chloride, but, as shown in the table below, each student ended up with different results. Lee is trying to determine what happened.
In a few minutes, you will see a video of what happened when Lee combined two substances. Before you watch the video, see if you can predict why each student ended up with different results.
Student's name Starting substances Ending substances
Lee sodium and hydrogen chloride hydrogen and sodium chloride
Vera sodium and hydrogen chloride hydrogen, sodium chloride, and sodium
Domingo sodium and hydrogen chloride hydrogen, sodium chloride, and hydrogen chloride
Why do you think Vera and Domingo ended up with three substances after the chemical reaction while Lee only ended up with two?
Answer:
chung long
Explanation:
cause 3 plus 2 =9
What is the pOH of a solution of pH 3 acid? (Kw= 1.0 x 10-14)
Answer:
pOH = 11
Explanation:
The pH is an unit of concentration widely used in chemistry to find the quality of a solution.
To solve this question we must, as first, find the [H+] using the pH:
[H+] = 10^-pH
[H+] = 10^-3
Now, using kw:
kw = 1.0x10-14 = [H+] [OH-]
1.0x10-14 = [10^-3] [OH-]
[OH-] = 1.0x10-11
pOH = -log [OH-]
pOH = 1190 grams of NaNO3 were added to solution at 10 degrees Celsius. What type of solution was formed?
Answer:
friend me on here and imma send you the link Explanation:
To determine the molar mass of an element, one must know the element's
a. number of isotopes.
b average atomic mass
c avogradro constant
d atomic number
Answer:
d
Explanation:
from you know the atomic number it should be easy to find
To determine the molar mass of an element, one must know the element's atomic number. Therefore, option D is correct.
What is the atomic number ?An element's atomic number (Z) is the number of protons in the nucleus of each atom of that element. This means that the number of protons is the feature that distinguishes each element from all others. Elements differ based on their atomic number.
Because the combined masses of protons and neutrons account for nearly all the mass of a given atom, the atomic mass of a single atom can be calculated by adding the total number of protons and neutrons of that particular isotope.
The atomic mass of any element on the periodic table can be used to calculate its molar mass.
Thus, option D is correct.
To learn more about an atomic number, follow the link;
https://brainly.com/question/16858932
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