Answers
7 u
Atomic mass = Mass of protons + mass of neutrons
⇒ Atomic mass = 4 u + 3 u = 7 u.
Tip: Electrons have negligible mass.
Mass of e- = 1/2000 × mass of p+.
Answer:
7
Explanation:
To find the Atomic Mass, you just add the protons and neutrons together.
Related Questions
Which of the following processes
release energy?
A. Water evaporating
B. Ice melting
C. steam condensing
D. wax melting
Answers
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?
Answers
Answer:
chung long
Explanation:
cause 3 plus 2 =9
How does the overall charge of oxygen of -16 compare to the overall charge of oxygen -17 and oxygen -18?
Answers
Answer:
-2
The charge on an oxygen ion is -2. An oxygen atoms contain six electrons in its valence electron shell.
Explanation:
which term best described energy stored in batteries and food
Answers
Answer:
energy stored is potential.
Explanation:
ALL THE THINGS YOU SAID ALL THE THINGS YOU SAID RUNING THROUGH MY HEAD RUNNING THROUGH MY HEAD HELPPPP
Answers
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
Which process is represented by the label a?
Answers
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.
29.) What charge would you expect from a Group 1 atom when it becomes an ion?
a.) 2-
b.) 2+
c.) 1-
d.) 1+
Answers
Answer:
d
Explanation:
It is 1+ because when the periodic table is drawn well into there groups become cations
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.
Answers
Answer:
the answer is B
Explanation:
the ice puts 8ts cold into the water taking it away from the ice
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?
Answers
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
Answers
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
#SPJ6
21.) This substance consists of two or more nonmetal elements in a fixed ratio.
a.) element
b.) mixture
c.) molecule
d.) compound
Answers
Answer:
Molecule
Explanation:
when two or more than two non-metal elements are combined then it form Molecule.
What is the percent by volume of 12.5 mL of ethanol in 250 mL of water?
3%
5%
4%
6%
Answers
How GM food are produced?
Answers
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.
please mark all that apply!
Answers
Answer:
F G there you go the guy on top is right
Explanation:
F G
you can test carbon dioxide gas with
Answers
Answer:
you can test carbon dioxide gas with calcium hydroxide
hope this is what you're looking for
stay safe and have a nice day
✌◕ ◡ ◕✌
what is acid? Explain it
Answers
Answer:
An acid is a chemical that is posining or sometimes not
Explanation:
This is the best I could explain brainliest
the molar mass of CCI2F2
Answers
Answer:
The molar mass and molecular weight of CCI2F2 is 315.8271.
Explanation:
How many grams of water are produced when 12.50 mol oxygen reacts with hydrogen?
Answers
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 :)
HELP PLEASE
1. Locations where volcanoes form far from plate boundaries are called
A. islands
B. hot spots
C. divergent zones
Answers
Which structure shows the correct electron arrangement in CC14?
Answers
Answer:
second one
Explanation
The reaction of an acid and a base will always produce what kind of salt?
A.
a combination of the cation from the acid and the anion from the base
B.
a combination of the cation from a strong base and the anion from a weak acid
C.
neutral salts from the cation of a strong base and the anion from a weak acid
D.
basic salts from the cation of a strong base and a strong acid
E.
depends on the strength of the acid and the base
Answers
Explanation:
E maybe i am not sure or C
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Answers
5) B
6) C
7) B newland, law of octaves
8) A)
It took 20.0 mL of NaOH to neutralize 25 mL of 0.50 M HCl. What is the molarity of the base?
Answers
Answer:
5/8 M
Explanation:
NaOH + HCl ====> NaCl + H2O
in 25 mL of 0.5M acid, we have 1/80 Mol of HCl
it mean we must have 1/80 Mol of NaOH.
20 mL = 1/50 L
(1/80)Mol / (1/50)L = 5/8 M
What is the pOH of a solution of pH 3 acid? (Kw= 1.0 x 10-14)
Answers
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 = 114. There are 1.9 moles of Oxygen gas at a pressure of 3.50 atm, and the temperature is 65°C. What is the
volume of the gas? Remember that R = 0.0821 L x atm/Kx mol AND that you must convert °C to K.
Fill in the variables chart:
Answers
Answer:
15.06 L
Explanation:
Using the ideal gas law equation:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question,
P = 3.50 atm
n = 1.9 moles
V = ?
T = 65°C = 65 + 273 = 338K
Using PV = nRT
V = nRT/P
V = (1.9 × 0.0821 × 338) ÷ (3.5)
V = 52.725 ÷ 3.5
V = 15.06 L
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
Answers
Answer:
D. the capacity to do work
Explanation:
the basic definition of energy is the ability to do work
What does a nucleus look like
Answers
Answer:
Explanation:
The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.
explain how lithium atom is positive charge
Answers
Hope this helps! Tbh am not good at explaining. If u have any doubts, ask me!
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
Answers
Answer:
I think the answer is boiling
What is the molar mass of Na2CO3?
60.0 g/mol
O 106.0 g/mol
118.0 g/mol
141.0 g/mol
Answers
Answer:
The required molar mass is 106.0 g/mol
Explanation:
We know,
Molar mass of Na = 23 g/mol
Molar mass of C= 12 g/mol
Molar mass of O= 16 g/mol
∴Molar mass of Na2CO3 = {(23 X 2) + 12+ (16 X 3)} g/mol
= (46 + 12 + 48) g/mol
= 106 g/mol
So, the required molar mass is 106.0 g/mol