Answer: The mass of the nucleus is less than the mass of the 8 protons and 8 neutrons.
Explanation:
Some properties of matter depend on how much matter there is. Put an X next to all of the statements you think are true about properties of matter.
Answer:
Its B and D :)
Explanation:
I saw the answer key.
12. What is a metal on the periodic table? What is a nonmetal? (Relative to the
metalloid staircase)
Answer:Metals are left of the Metalloid stair case and non metals are right
Explanation:
Pick any metal on the periodic table (left of the staircase). Aluminum, Calcium, Lead, anything but Hydrogen.
Non-metals are found on the right side of the staircase. Chorine, Iodine, Carbon, etc
**Keep in mind that not all solids are metalloids.
A mole is blank objects
Answer:
Well what I found was that this was this answer
Explanation:
A mole is 6.022 x 1023 objects of any kind - atoms, electrons, molecules, cars, people, etc... . It is known as Avogadro's number after the scientist who discovered ... Blah blah I think you get it.
What is the MOST important factor in the changing of the seasons?
A. the earth’s tilt toward the sun
B. the heating and cooling of land
C. the Earth’s distance from the sun
D. the amount of rainfall received
Answer:
A. the earth’s tilt toward the sun
Explanation:
The most important factor in the changing of the seasons on the earth is the earth's tilt towards the sun.
This causes the differences in the amount of insolation which is incident on the earth surface. Throughout the year, as the earth continues to spin, it receives different amount of solar radiation all year round.
The sun is always overhead around the equator. Such regions of the world receives direct insolation and are mostly constrained to a wet and dry season.
Areas above the equator have the sun at an angle. The diffused sunlight present distinct seasons all year round.
Carbon and fluorine have the same shielding effect
True or False
Answer:
true
Explanation:
There are two electrons (in the 1s orbital) on both carbon and fluorine “shielding” the outer electrons from the full force of the nucleus and due to both atoms being approximately the same size (both period two) then it is this shielding effect and proton difference that is causing the electronegativity difference
Are you brainly, then answer this, I’ll give you brainliest
The most common reaction that alkane under go is?
Select one:
a. Substitution
b. Addition
c. Decomposition
d. Elimination
Explain please
Answer:
a.substitution
Explanation:
because one of the hydrogen atoms from the methane is replaced with a bromine atom.Alkanes undergo a substitution reaction with halogens in the presence of light. For example, in ultraviolet light , methane reacts with halogen molecules such as chlorine and bromine. This is a substitution reaction because one of the hydrogen atoms from the methane is replaced by a bromine atom.
Which of the following elements would form the smallest ionic radius and why?
Fluorine, Sodium, Magnesium.
Answer:
Sodium
Explanation:
The density of water is 1 g/cm3(1 gram per cubic centimeter); using this fact as a reference & Table c , how would you determine if an object sinks or float
Answer:
Explanation:
Any densities less than 1g/cm3 will float, while objects with densities over 1g/cm3 will sink.
What are two factors that affect the function of enzymes
Answer:
Temperature
PH
Explanation:
Enzymes are organic catalysts that speeds up the rate of a chemical reaction. Their activities are affected by temperature and pH of the environment among other factors.
At extreme temperatures, enzymes can easily be denatured and they will cease to act. At extremes of pH, they can also be adversely affect.Enzymes generally have temperature and pH window for their activity.
How does your body generate heat
Answer: Thermogenesis:Your body's muscles, organs, and brain produce heat in a variety of ways. For example, muscles can produce heat by shivering. Hormonal thermogenesis: Your thyroid gland releases hormones to increase your metabolism. This increases the energy your body creates and the amount of heat it produces.
Explanation:
Is sand and water a pure substance or mixture
Answer:
mixture
Explanation:
if u put sand in to a glass of water it is considered to be a mixture.
Why can't scientists simply use carbon-12 (12C) do determine
the age of dead carbon-based life forms?
Answer:
carbon-12 is not radioactive
Explanation:
The measurement of the age of dead carbon based life forms requires the use of a radioactive isotope hence it is often referred to as radiocarbon dating.
Carbon-12 and Carbon-14 occur together in living things.The half life of Carbon-14 is about 5670 years.
Hence, since Carbon-12 is not radioactive, it can not be used to measure the age of dead carbon based materials.
Q4: Ethanol has a boiling point of 78°C.Water has a boiling point of 100°C.
Describe how distillation is used to separate a mixture of ethanol and water.
Explanation:
A mixture of ethanol and water can easily be separated by distillation. Distillation separation technique utilizes the differences in boiling point of a mixture of two liquids.
Since water has a higher boiling point compared to alcohol, it makes it easier for the process of distillation to occur
In the distillation flask, the mixture is heated to a set temperature. At the boiling point of alcohol, the first fraction of this component begins to rise in the mixture and it is collected over the condenser. The remaining fraction will then be water.If an object has zero velocity, will the object be in motion? Why or why not?
Answer:
The object will not be in motion
Explanation:
An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. ... Objects resist changes in their velocity.
Answer:
Yes it can be in motion
Explanation:
Even though it stopped, i.e the velocity is zero, the acceleration would be the acceleration due to gravity, 9.8 m/s. Acceleration can only be calculated over a period of time. This means, even if the motion of the body changes after infinitesimally small period of time, the object will have an acceleration.
In which of the following areas will soil erosion be greatest?
Answer:
Erosion happens at the tops of mountains and under the soil. Water and chemicals get into the rocks and break them up through those mechanical and chemical forces. Erosion in one area can actually build up lower areas. Think about a mountain range and a river.
if an atom has 6 protons and 5 neutrons, what is its mass? _________ amu
Answer:An atom has 5 protons, 5 electrons and 6 neutrons The atomic number = number of protons = number of electrons = 5 The mass number = 5 protons + 6 neutrons = 11
how much of the solar energy is absorbed by a surface of snow? How much solar energy does a dark forest absorb?
Question 52 points)
The electromagnetic waves with the highest frequency are ______ waves
Answer: Gamma Rays
Explanation:
The waves with the highest frequency are Gamma Rays. These electromagnetic waves travel at a very high speed. Best of Luck to you!
A weather balloon is inflated to a volume of 2200 L or 2.2 x 103 L with 374 g of helium. What is the density of helium in g/L
Answer:
The answer is 0.17 g/LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{374}{2200} = \frac{17}{100} \\ [/tex]
We have the final answer as
0.17 g/LHope this helps you
Answer:
0.17 I am 100% sure :)
Why Basalt and gabbro are denser than granite and
obsidian?
Answer:
What do you think causes some rock types to have higher densities than others? (Assuming there are no air pockets in the rock, the types of minerals will determine the density. Granite contains lots of quartz and feldspar - both fairly light minerals, whereas basalt and gabbro are made of heavier minerals.)
Explanation:
Someone please help will mark as brainliest
Answer: The answer is D.
Explanation: The warm water will cause the sugar to dissolve quicker.
Mitochondria ideas ......... help it due in 2 mins
Answer:
Mitochondria are the structures within cells that produce energy. The mitochondria modulate cell metabolism, reactive oxygen species (ROS) genesis, cell apoptosis, and the universal second messenger, calcium. An example of mitochondria is what regulates metabolism in human cells.
Explanation:
please help me it's due today thanks :)
Answer:
true
Explanation:
Can somebody tell me the answers on which one I should circle correctly for each question!!! WILL MARK BRAINLIEST
(Grade7science)
Thanks!
Answer:
1. False
2. True
3. True
4. True
5. False
Explanation:
Which statement correctly describes what atoms and molecules are made
of?
о
A. Atoms are made of molecules, and molecules are made of
protons, neutrons, and electrons.
B. Molecules are made of protons and neutrons, and atoms are
made of electrons and protons.
C. Atoms are made of protons and electrons, and molecules are
made of neutrons and electrons.
D. Molecules are made of atoms, and atoms are made of protons,
neutrons, and electrons.
Answer:
D
Explanation:
Answer:D. Molecules are made of atoms, and atoms are made of protons,neutrons, and electrons.
Explanation:
hydrated CoCl2 is a deep purple color. After being heated for a long time, it turns into its anhydrous form, which is sky blue. Is this a chemical or physical change
Answer:
Physical change
Explanation:
It is a physical change because a physical change involves alteration in physical properties or appearance in color, sizes e.t.c but no new substances is formed. From the question, CoCl2 undergo a physical change because it's physical property which is color changed , its composition is not altered or no new substances is formed during the reaction.
Given the following isotopes of strontium, calculate the average atomic mass.
43.65% strontium at a mass of 87.05 amu, and 48.24% of strontium at a mass of 87.93 amu and 8.11% of strontium at a mass of 87.50 amus.
Answer:
87.5198
Explanation:
(43.65 * 87.05) + (48.25 * 87.93) + (8.11 * 87.50) = 8751.98
8751.98 / 100 = 87.5198
1.Write the balanced chemical equation for the complete combustion of C5H 12 in excess oxygen.
2. Write the balanced chemical equation for the incomplete combustion of C5H 12 in a limited supply of oxygen.
Answer:
C5H12 + 8 O2 ---> 5 CO2 + 6 H2O
Explanation:
any combustion reaction reacts with oxygen to form carbon dioxide and water.
So you would write C5H12 + O2 ----> CO2 + H2O
(oxygen is a diatomic therefore it gets a 2 subscript)
next you just have to balance this equation (Combustions are the WORSE to balance so here you go!)
C5H12 + 8 O2 ---> 5 CO2 + 6 H2O
Will mark brainliest
Which statement describes a compound machine?
It is made up of more than one simple machine.
It makes work more difficult.
It has movement in only one direction.
It can only be acted on by one force.
Answer:
It is made up of more than one simple machine.
Explanation:
i did test and got it right
Answer:
It is made up of more than one machine, the reason this is right is because when you think of compound you think of more than one right so yeah that's how I got my answer.
Explanation:
Which statement accurately describes the reactants of a reaction? new substances that are present at the end of a reaction substances that are used up in a reaction substances that do not participate in a reaction new substances formed in the reaction
Answer:
C
Explanation:
took the test and got it correct
In a chemical reaction, reactants of the reaction are the substances that are used up in a reaction.
What is a chemical reaction?Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.
There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical reactions:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
Learn more about chemical reactions,here:
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