Answer: FALSE
In order to find the mass of a substance you need to measure the container with the substance in it, and then take a second measurement with the container empty. You would then subtract the two measurements to find the total mass of the substance, you would not add as stated in the question.
The energy produced in the stars results from
Answer:
Explanation:
Hydrogen fusion (nuclear fusion of four protons to form a helium-4 nucleus) is the dominant process that generates energy in the cores of main-sequence stars. It is also called "hydrogen burning", which should not be confused with the chemical combustion of hydrogen in an oxidizing atmosphere.
I need helpp!! This is due tomorrow at 8 am it says to Calculate the density of a solid that has a mass of 32.5 g and displaces 6.7 mL of water.
The density of gold is 19.3 g/cm3. What is the mass of 11.3 cm3 of gold? Show your work.
Answer:
218.09g
Explanation:
the formula for density is mass/volume
you have volume so rlly what you have is 19.3g/cm3=m/11.3cm3
so mass equals density x volume
and 19.3 x 11.3 = 218.09
You are on an alien planet where the names for substances and the units of measures are very unfamiliar. Nonetheless, you obtain 40 quibs of a substance called skvarnick. You can trade this skvarnick for gold coins, but the vendors all measure skvarnick in units of sleps; not quibs. 15 quibs is equal to 13 sleps. If you have 40 quibs of skvarnick, how many sleps do you have? Round your answer to the nearest tenth (one decimal place). Type only the number; not the number and unit. Your Answer:
If a cube has a volume of 25.0 mL, what mass, in grams, would it have to have to
be made of gold? Gold has a density of 19.3 g/mL. (Answer only the number with
the correct number of sigfigs) *
Answer:
482.5 grams
Explanation:
Given that,
Volume of a cube is 25 mL
The density of gold is 19.3 g/mL
We need to find the mass of the gold cube. We know that density is equal to the mass per unit volume. So,
[tex]d=\dfrac{m}{V}\\\\m=d\times V\\\\m=19.3\ g/mL\times 25\ mL\\\\m=482.5\ g[/tex]
So, the mass of the gold cube is 482.5 grams.
Is an apple seed a compound?
Answer:
no, but they contain a compound plant called amygdalin, so technocly yes
Explanation:
What is commensalism? Give two examples.
Answer:
Commensalism is a relationship between two organisms in which one organism benefits, and the other one is left unaffected.
Examples:
1. Barnacles on a sea turtle
2. Tree frogs and plants (they use them as protection)
1. Barnacles on a sea turtle
2. Tree frogs and plants (they use them as protection)
hope this helps
a
Which of the following statements is true?
Lysosomes and chloroplasts are unique to plant cells.
O A nerve cell contains more mitochondria than a muscle cell.
Homeostasis on the cellular level is controlled by the cell membrane.
Instead of a cell membrane, plant cells have cell walls.
Answer: Homeostasis on the cellular level is controlled by the cell membrane.
Explanation:
Answer:
C
Explanation:
That's what the first guy said. lol
Describe the difference between an atomic element and a molecular element. Check all that apply. Check all that apply. Molecular elements exist with a single atom as their basic unit. Atomic elements exist with a single atom as their basic unit. H2, F2, and P4 are some examples of atomic elements. H, F, and P are some examples of molecular elements. Atomic elements have more than one atom in their basic unit. H, F, and P are some examples of atomic elements. H2, F2, and P4 are some examples of molecular elements. Molecular elements have more than one atom in their basic unit.
Answer:
Atomic elements exist with a single atom as their basic unit.
H, F, and P are some examples of atomic elements.
H2, F2, and P4 are some examples of molecular elements.
Molecular elements have more than one atom in their basic unit.
Explanation:
Atomic element exists as the smallest particle of an element that can take part in a chemical reaction. They exist with a single atom as their basic unit. The atomic number of an element is the number of protons present in the atomic nucleus of the element. Atomic elements are usually monoatomic such as H, F and P.
Molecular elements are the smallest particle that are capable of independent existence and still retains the chemical properties of those substances. They are capable of independent existence because they are diatomic. The combination of atoms of the same type produces a molecule of an element such as H₂, F₂, and P₂.
If the half life of Substance A is 0.5 years, how long would it take for 2 grams of substance A to remain given an initial mass of 16 grams?
Time taken is given by :
[tex]t=-\dfrac{1}{k}\dfrac{[A_t]}{[A_o]}[/tex] .......( 1 )
Also,
[tex]k = \dfrac{0.693}{t_{0.5}}\\\\\\k=\dfrac{0.693}{0.5}\\\\k=2\times 0.693\ year^{-1}[/tex]
Putting value of k in equation 1, we get :
[tex]t=\dfrac{1}{2\times 0.693}\times ln(\dfrac{2}{16})\\\\t=1.5\ years[/tex]
Therefore, time taken is 1.5 years.
Hence, this is the required solution.
What is 5928km expressed in scientific notation
Answer:
5.928 x 10^3 km
Explanation:
does a liquid have a shape??
Answer:
Yes, just not a fixed shape.
Explanation:
A liquid take shape of whatever is containing but that does not fix it. As long as it is being contained it retains it's shape, yet the second you release it from it's containment it becomes the shape and can take the physical properies of whatever it is contained by next.
an object has a mass of 45.0 g and a volume of 4.0 ml. what is its density?
Answer:
The answer is
11.25 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
From the question
mass = 45 g
volume = 4 mL
Substitute the values into the above formula and solve for the density
We have
[tex]Density = \frac{45}{4} [/tex]
We have the final answer as
11.25 g/mLHope this helps you
A piece if stone has a mass of 24.595 grams and a volume of 5.34 cm ^3. What is the density of the stone
Answer:
The answer is
4.61 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of stone = 24.595 g
volume = 5.34 cm³
The density of the stone is
[tex]density = \frac{24.595}{5.34} \\ = 4.605805243...[/tex]
We have the final answer as
4.61 g/cm³Hope this helps you
1. How to elements differ from compounds?
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.
Explanation:
Answer:
A compound is just like what it is- a group of atoms put together. A element is made up of only 1 atom.
Explanation:
How should you indicate that there are multiple polyatomic
ions in a chemical formula?
Answer: correct answer is C
Parentheses around the atoms in the ion an then added a subscript
Explanation:
A P E X
If you have difficulty removing a ring from your finger, you usually lubricate your finger with oil or soap
Why, in most cases, does this procedure work
Answer:
Because oil reduces the friction between the surface of your ring and your finger.
Thus it helps you to remove your ring easily
Hope it helps
Sabendo que os calores de combustão do enxofre monoclínico e do enxofre rômbico são, respectivamente, - 297,2 kJ/mol e - 296,8 kJ/mol, calcule a variação de entalpia na transformação de 1 mol de enxofre rômbico em enxofre monoclínico. S (mon.) + O2(g) SO2(g) ∆H1 = –297,2 kJ/mol S (rômb.) + O2(g) SO2(g) ∆H2 = –296,8 kJ/mol
Responda:
+ 0,9kJ / mol
Explicação:
Dados os calores de combustão do enxofre monoclínico e enxofre rômbico como - 297,2 kJ / mol e - 296,8 kJ / mol, respectivamente para a variação na transformação de 1 mol de enxofre rômbico em enxofre monoclínico conforme mostrado pela equação;
S (mon.) + O2 (g) -> SO2 (g)
Uma vez que são todos 1 mol cada, a mudança na entalpia será expressa como ∆H = ∆H2-∆H1
Dado ∆H2 = -296,8kJ / mol
∆H1 = -297,2kJ / mol
∆H = -296,8 - (- 297,2)
∆H = -296,8 + 297,2
∆H = 297,2-296,8
∆H = + 0,9kJ / mol
Portanto, a mudança na entalpia da equação é + 0,9kJ / mol
brainliest to whoever answers, correctly.
valid experiment for does water and oil mix
Answer: Water and oil cannot mix
Explanation:
A 55.0 g piece of iron at 505 ° C is put into 735 grams of water at 15.0 ° C. What is the final temperature of the water and the iron?
Answer:
It would be 95.3
Explanation:
I need Helpppp pleaseee
Answer:
9) 126.86 amu
Explanation:
Please see the attached picture for full solution.
*I can't see the fractional abundance for Q8. Thus, I am unable to help you with that.
To find the avg atomic mass, multiply the fractional abundance to each of the masses and add them all up.
Convert 8.7 g to mg
Which actions are part of a system of methodical tests and refinements specific to technological design? 1 documenting, tinkering, testing 2 tinkering, presenting, testing 3 testing, documenting, pr esenting 4 presenting, tinkering, testing
Answer:
1. documenting, tinkering, testing
Explanation:
Technological design is defined as the process of study, design and development of new technologies.
There are some action in the methodical tests and refinements specific to technological design include documenting, tinkering, testing.
Documenting includes collecting all the information about the design and develop the product, tinkering involves repairing or adjust the issues found in the development, and testing helps to evaluate if the product is ready to work as it is supposed to.
Hence, the correct answer is "1."
What is the Causative agent
Syphilis?
Answer:
Explanation:
CAUSATIVE AGENTS. Syphilis is a chronic infectious disease caused by the spirochaete Treponema pallidum.
Describe yourself based on food
Support and explain your thinking with the emphasis on how you think offspring (babies) get their traits.
Answer:
The baby's get there traits from their parents and ancestors
3. Describe air using the terms: mixture, atoms, and molecules.
I
Air is a mixture of gases. Air is composed of molecules such as oxygen, nitrogen and carbon dioxide. Air also contains atoms of noble gases such as neon, argon etc.
Air is composed of 21% molecular oxygen and 78% molecular nitrogen. Also, there is about 0.03% of carbon dioxide molecules in air.
Air is generally defined as a mixture of gases owing to the number of gaseous substances that compose air.
Also, there is a trace amount of noble gases which largely exists as monoatomic species in air.
Learn more: https://brainly.com/question/19368011
1. Identifying two types of energy
2. Explaining how you know they are there
Answer:
Kinetic Energy and Potential Energy
Explanation:
When an object is in motion(ie.moving), it has kinetic energy. Energy stored in an object due to position and state, is called potential energy.
What is a Mole...
I need an answer please..
Answer:
Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
Explanation:
Answer:
Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles
