What is an atomic nucleus?
the outer part of an atom in which electrons move
the outer part of an atom in which neutrons move
the central part of an atom, composed of protons and neutrons
the central part of an atom, composed of protons and electrons
Answers
Answer:-
the central part of an atom compsed of protons and neutrons.
Related Questions
Which do you think has the greater total kinetic energy?
a. The molecules of the water in the teacup
b. The molecules of the water in the bathtub
Answers
Answer:
a The molecules of the water in the teacup
hope it helps
Calculate the volume which 1.00 mole of a gas occupies at 1 atm and 298K?
Answers
Answer:
25.45 Liters
Explanation:
Using Ideal Gas Law PV = nRT => V = nRT/P
V = (1mole)(0.08206Latm/molK)(298K)/(1atm) = 25.45 Liters
yield for this reaction?
Reaction: N2(g) + 3 H2(g) → 2 NH3 (g)
Answers
Answer:
Yes, yield.
Explanation:
N2(g) + 3 H2(g) → 2 NH3 (g) balanced equation
First, find limiting reactant:
Moles H2 = 1.83 g x 1 mole/2 g = 0.915 moles H2
Moles N2 = 9.84 g N2 x 1 mole/28 g = 0.351 moles N2
The mole ratio of H2: N2 is 3:1, so H2 is limiting (0.915 is less than 3 x 0.351)
Theoretical yield of NH3 = 0.915 mol H2 x 2 mol NH3/3 mol H2 = 0.61 moles NH3
Which statement best explains how the conditions identified in Part A affect the availability of opal?
A
Weathering processes no longer occur in Australia, so no new opal is formed.
B
Gems do not need an exact combination of elements or minerals to form, so opal forms more easily.
C
Opal formation occurs over large periods of time, so the number of opal deposits is limited.
D
Volcanoes in Australia no longer provide high temperatures and pressures, so no new opal is formed.
Answers
Answer:
C
Explanation:
Which of the following is not a compound?
Cl
CO2
NaCl
HCl
Answers
For this reaction: ____NH3 + ____O2 ____NO + ____H2O a. How many moles of oxygen are needed to react with 3.24 moles of ammonia?
Answers
Answer:
uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh this is hard I'm a come back when I solve it
What 2 phases of the water cycle most affect the imbalance of each of these?
Answers
Answer:
gas and leqwed
Explanation:
leqwed goes to gas
Answer: evaporation and precipitation
Use the kinetic energy equation to explain why speed has a greater impact on kinetic energy than mass.
Answers
Answer: Hopefully this helps! sorry if not. :))
Speed has a greater impact on mass because its increases in velocity have an exponentially greater impact on translational kinetic energy because kinetic energy is proportional to velocity squared. Doubling an object's mass would only double its kinetic energy, however doubling its momentum would quadruple its velocity.
Which body system includes the brain, spinal cord and nerves? A Circulatory B Reproductive C Nervous
Answers
Answer:
C. Nervous
Explanation:
The nervous system is a system of the body of living organisms which includes the brain, spinal cord and nerves.
Consider the sugar below.
CH2OH
О
CH2OH
Н
Н
Н
ОН Н
о
ОН
НО
т
ОН Н
Н
ОН
Т-
Н
Н
ОН
Which term best describes this sugar?
disaccharide
monosaccharide
polysaccharide
X saccharide
Answers
Will carbon and hydrogen atoms most likely form an ionic bond or a covalent bond?
Answers
zinc, sulphur, oxygen
What would this compound be called?
Answers
Zinc sulphate
Zinc sulphateZnSO₄
This is the answer.
Why is this considered a theory instead of a hypothesis or a law?
(When a dangerous microscopic organism is transferred from one person to many people,
Answers
Answer:
This is considered a hypothesis because it hasn't been confirmed. It is just a guess.
Explanation:
A hypothesis is a limited explanation of a phenomenon; a scientific theory is an in-depth explanation of the observed phenomenon. Law is a statement about an observed phenomenon or a unifying concept, according to Kennesaw State University. However, Newton's law doesn't explain what gravity is, or how it works.
Answer:
c
Explanation:
A. It is a statement of fact about how nature works instead of an explanation.
B. It provides an explanation for many observations and accepted hypotheses.
C. It describes how to test a possible explanation of one specific relationship.
D. It has not changed over time even though new technology has been developed.
Which of the following will form a metallic bond with a metal?
a
another metal
b
none of the other choices
c
semimetal
d
a nonmetal
Answers
fill in the blank if its true or false
T=True
F=False
_________ 1. Stars do not change over their life cycles.
_________ 2. A protostar is the latest stage of a star’s life.
_________ 3. The larger the mass, the shorter the life cycle.
_________ 4. The hottest stars are blue and the coolest stars are red.
_________ 5. The white dwarf eventually runs out of fuel and dies as a red dwarf.
_________ 6. Our Sun is in the main sequence at the moment.
Answers
Answer: 1. F
2. F
3. T
4. F
5. T
6. T
Explanation:
I am not sure i'm sorry if it isn't right
The Concrete that surrounds a swimming pool takes less time to heat up than the water in the pool. Why
Answers
Answer:
The Concrete has a lower specific heat.
Explanation:
Question 24 of 33
Which of the following pairs of elements will form covalent bonds with each
other?
The Periodic Table
A. Magnesium (Mg) and oxygen (0)
B. Chromium (Cr) and zinc (Zn)
O
C. Silicon (Si) and nitrogen (N)
D. Potassium (K) and bromine (Br)
Answers
The elements that will form covalent bonds are Silicon (Si) and nitrogen (N), option C.
What are covalent bonds?A covalent bond is formed between two atoms by the mutual sharing of one or more pairs of electrons. The two atomic nuclei attract these electrons at the same time. When the difference in electro-negativities of two atoms is too small for electron transfer to form ions, a covalent bond forms.
Hydrogen (H₂) is a molecule with a single covalent bond as well as Halogens like Fluorine (F), Chlorine (Cl), Silicon (Si) and nitrogen (N).
Find out more on covalent bonds here: https://brainly.com/question/12732708
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what is global warming
Answers
An unknown amount of sodium azide (NaN3) reacts and produces 0.033 moles of nitrogen gas. What mass of sodium metal is produced
Answers
Answer:
Mass of sodium metal is 130.87 gram
Explanation:
The complete reaction is
2 NaN3 --> 2 Na + 3 N2
We know that PV = nRT
n = [tex]\frac{PV}{RT}[/tex]
On substituting the given values, we get
[tex]n = \frac{\frac{99707}{101325}*75 }{0.082 *(273.15 +15)} \\n = 3.02[/tex]moles of N2
Sodium azide's molar mass
3.02 *(2/3) = 2.013 moles
Mass = 2.03 * 65.01 = 130.87 gram
zinc + hydrogen arsenate—>
What type of reaction is this? (Synthesis, Decomposition, or Single Replacement?
Answers
Answer:
Single Replacement
Explanation:
im just smart lol
What type of shape does a liquid have?
Answers
Answer:
no definite shape
Explanation:
Answer:
Liquids have no definite shape (takes the shape of its container) they have a definite volume. Particles are free to move over each other, but are still attracted to each other.
Explanation:
Hope this helps!
Two reactant particles collide with proper orientation. The collision will be
effective if the particles have
(A) sufficient potential energy
(B) high activation energy
(C) high ionization energy
(D) sufficient kinetic energy
And explain why
Answers
Answer: D) Sufficient kinetic energy
Explanation:
2. Which of the following is/are TRUE regarding net ionic equations?
A. Net ionic equations show only the particles directly involved in the
chemical change.
B. Spectator ions are included in complete equations, but not in net ionic
equations.
C. lonic charges do not need to be balanced in a net ionic equation.
D. Combustion, combination, and decomposition reactions can be written as
net ionic equations.
Answers
A and B are true.
C and D are false.
Out of the given four statements, A and B are only correct.
Explanation:
In the complete equation of a chemical reaction, the complete symbols of reactants and products are written along with states of matter under conditions at which the reaction is taking place.In the net ionic equation of a chemical reaction, only those chemical species are written which directly participating in the chemical reaction.The mass and charge in the net ion equation must be balancedIt is used in neutralization reactions, redox reactions, double displacement reactions.So from this, we can conclude that out of the given four statements, A and B are only correct.
Learn more about the net ionic equation here:
brainly.com/question/7018960?referrer=searchResults
brainly.com/question/19510514?referrer=searchResults
If 148.8 grams HCl reacts with excess Zn, how many moles of ZnCl2 could be
formed? (Molar mass of HCI=36.46 g/mol)
Answers
Answer:
2.04moles
Explanation:
The balanced chemical equation of this reaction is given as follows:
Zn + 2HCl → ZnCl2 + H2
Based on the above balanced equation, 2 moles of hydrochloric acid (HCl) reacts to produce 1 mole of Zinc chloride (ZnCl2).
The question states that 148.8 grams HCl reacts. We need to convert this value to mole by using the formula;
mole = mass/molar mass
Molar mass = 36.46g/lol
mole = 148.8/36.46
mole = 4.08moles of HCl
Hence, if 2 moles of hydrochloric acid (HCl) reacts to produce 1 mole of Zinc chloride (ZnCl2).
Then, 4.08moles of HCl will react to produce (4.08 × 1/2)
= 2.04moles of ZnCl2.
SEP Design a Solution A simple bread recipe calls for 400 g of flour, 7 g of salt
(NaCl), 1 g of yeast, and 0.3 L of water (H2O). You have exactly 0.6 mol of salt. If
you want to use all of the salt, how many loaves of bread could you make? How
much of each of the other ingredients would you need?
Answers
Answer:
5 loaves of bread, 5g of yeast
what is elastic energy
Answers
Answer:Elastic energy is energy stored in an object for temporary strain. It is basically potential energy.
Balance the following equation: Fe2O3 + H2O --> Fe(OH)3
A.3,2,1
B.2,2,3
C.1,3,2
D.5,2,10
Answers
Answer:
answer is c
Explanation:
hope it helps!!!
Calculate the pH is the
concentration of [H+] = 1.00x 10^-11
Answers
Answer:
1e - 11
Explanation:
I need help with this please
Answers
Answer: the place that i put the letters is how it should look also 75% of your peas are green
Explanation:
The Himalayan balsam plant makes seeds in pods and releases them when it is ready, while the Surinam toad absorbs its eggs into its own back until they are ready to come out. How are the adaptations of the balsam and the toad similar?
A: They are behaviors that allow the plant and the animal to reproduce through shorter life cycles.
B: They are behaviors that protect the plant and the animal from predators.
C: They are life cycle differences that protect the offspring and help them to survive.
D: They are physical characteristics that allow the offspring to survive in cold weather conditions.
Answers
Answer:a
Explanation:
Answer:
A
Explanation: