Answer:
1.27 g/cm^3
Explanation:
Density of a body is defined as mass/volume. We can easily read off the mass of the marble from the image.
Mass of the body = 3.8 grams
Volume of the body = 3 ml
Density of the body; mass/volume
D= 3.8/3
D= 1.27 g/cm^3
Whats the periodic table?
Answer:
A chart that shows the elements based on atomic number, from lowest to highest.
Explanation:
Answer:
The answer will be listed below.
Explanation:
The Periodic Table is a display of 118 different chemical elements. They are arranged by their atomic numbers. The Periodic table displays the element's chemical symbol, mass, atomic number, and what group they are in.
The noble gases, or group 18, on the periodic table are known to be unreactive. Which of the following reason best describes why this family is so inert?
Their outer shells are full, they can't hold any more electrons.
Their outer shells need one electron to be full.
Their outer shells have 2 electrons.
Their outer shells have 1 electron.
Answer:
Their outer shells are full, they can't hold any more electrons.
gravity and magnetism are examples of what?
Answer:
hyposthesis
Explanation:
what is experiment ? explain in teacher's language
Answer:
A scientific experiment undertaken to make a discovery, to test a hypothesis or to demonstrate a known fact.
Explanation:
Experiment is described as attempting something new or testing a theory. An example of an experiment is when you try a new style of hair. An example of an experiment is when you use test tubes and chemicals in a chemistry lab to complete a project to try to better understand the chemical reactions.
7.
Good scientists use honesty when reporting their observations
and results.
True,faulty or bias
Answer:
True is the answer because when you are observing in order to make a report especially when you are a scientist your reports must be based on exactly what you say in order to not give incorrect information for it could be very critical.
which would probably have the greatest effect on a proteins function - a change to the primary, secondary,or tertiary structure?
10. COMMUNITY EDUCATION A local community center offers self-defense classes for teens. A $25 enrollment
fee covers supplies and materials and open classes cost $10 each. Write an equation to represent the total cost of x
self-defense classes at the community center,
Answer:
25+10y=x
Explanation:
$25 initial cost
$10 per class (y)
total cost (x)
Which coefficient is needed in front of NaNO3 to balance the equation Na2S + Zn(NO3)2 – ZnS + _NaNO3?
O 1
O 2
O 5
O 7
Answer:
A.1
Explanation:
The coefficient needed in front of NaNO₃ to balance the equation
Na₂S+ Zn(NO₃)₂---->ZnS + NaNO₃ is 2, therefore option (b) is correct.
What do you mean by the balanced chemical equation ?A balanced chemical equation is an equation that has equal numbers of atoms for each element both on the reactant and product sides.
Methods to balance the chemical equation -:
The number of atoms for a given element is calculated by multiplying its coefficient with the element’s subscript in its chemical formula.
The coefficients in front of the formulas to show how many molecules of that material are used or produced.
Hence, the coefficient needed in front of NaNO₃ to balance the equation
Na₂S+ Zn(NO₃)₂---->ZnS + NaNO₃ is 2, therefore option (b) is correct.
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Which of the following groups is not reactive? Circle all that apply.
a. Alkali metals
b. Alkaline earth metals
C. Halogens
d. Noble gases
What types of compounds are most likely to form double or triple bonds
Explanation:
ionic compounds eg sodium chloride
covalent compounds e.gmethane
Which is not a property of gold
A)rare
B)tarnishes
C)malleable
D)corrosion resistant
Answer:
B) Tarnishes
Explanation:
Gold is rare, Gold is malleable, Gold is corrosion resistant
Hope this helps!
The graphs below show the change in temperature and salinity of a region of ocean as a instrument is lowered below the surface. Depth is measured in kilometers below the surface, temperature in degree Celsius, and salinity in parts per thousand.
Which prediction is most likely, based on the data?
Answers:
A) In the ocean, as salinity increases, temperature increases.
B) Organisms that require a steady salinity move freely between sea level and -0.4 km.
C) Ocean salinity decreases at depths greater than -1.8 km below the surface.
D) Organisms that require a temperature at 5 degrees C will thrive -0.6 km below the surface.
The most likely prediction based on the data is 'organisms that require a steady salinity move freely between sea level and -0.4 km' (Option B).
Salinity conditions refer to the concentration of dissolved salts in an aqueous medium.Salinity conditions may alter the physiological features of an organism, as well as its metabolic pathways (e.g., behavior, reproduction, motion).The changes in salinity can negatively alter the evolutionary fitness of an organism and its survival in particular environmental conditions (in this case, steady salinity allows organisms to move freely).In conclusion, the most likely prediction based on the data is 'organisms that require a steady salinity move freely between sea level and -0.4 km' (Option B).
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Which element is identified by the chemical symbol C?
A)cobalt
B)carbon
C)calcium
D)chlorine
Answer:
B Carbon
Explanation:
I really hopes this helps you!
What type of harmful bacteria did they feed the mice in the experiment?
O C. difficile
O Salmonella
Bacilli
O E. coli
Answer:
I believe the answer is C. difficile but to be honest I don't know for sure
HELP ASAP PLEASE! PLEASE
FIll in the blank
your answer will be Carbon
I just got help from a friend!
During which phase does Earth see more than half of the moon's surface? first quarter third quarter waxing gibbous waning crescent
A: Frist quarter
b: third quarter
c: waxing gibbous
d: waning crescent
Answer:
c
Explanation:
During the "Third Quarter" phase, Earth sees more than half of the moon's surface. The correct option is B.
What is Waxing Gibbous and Waning Crescent?Waxing Gibbous and Waning Crescent are two phases of the Moon.
Waxing Gibbous is a phase of the Moon that occurs after the First Quarter phase and before the Full Moon phase. During this phase, the illuminated portion of the Moon is greater than half but less than fully illuminated, meaning it appears to be a "bulging" shape. The term "waxing" means that the illuminated portion of the Moon is increasing in size.
The Waning Crescent is a phase of the Moon that occurs after the Third Quarter phase and before the New Moon phase. During this phase, the illuminated portion of the Moon is less than half and decreasing in size. The term "waning" means that the illuminated portion of the Moon is decreasing in size. The crescent shape refers to the thin sliver of illuminated portion of the Moon that is visible during this phase.
Here in this question,
During the First Quarter phase, the right half of the Moon's surface is visible from Earth.
During the Third Quarter phase, the left half of the Moon's surface is visible from Earth.
During the Waxing Gibbous phase, more than half of the Moon's surface is visible, but Earth does not see more than half.
During the Waning Crescent phase, less than half of the Moon's surface is visible, and Earth does not see more than half.
Therefore, Option B i.e third quarter is correct.
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What classification is salt?
Answer:
Sodium chloride
Brainlist??
Another question please help!!! :)
The answer is [Boron]
I had this answer on my Chemistry test!
Chlorine is a very reactive non-metals. Why
Answer:
Chlorine is a very reactive non metals because this element don't form any known chemical compound.
Explanation:
Chlorine atoms have a lot of valance electrons without being complete on its own, so it has a greater need to seek it's conjugates. That's called electronegativity. Halogens are highly reactive because of their electronegativity.
Is hot chocolate a pure substance or a mixture? Explain.
Answer:
It is a mixture
Explanation:
Because it mixes chocolate, milk, sugar, and vanilla to make it sweet and not taste like plain cocoa powder.
What tool do we use to measure volume
Answer:
Graduated cylinders, beakers, volumetric pipets, burets and volumetric flasks are five kinds of glassware often used to measure out specific volumes. Volumetric pipets, flasks and burets are the most accurate; the glassware makers calibrate these to a high level of accuracy.
Explanation:
hope this helps :)
An atom can be called a particle, but a molecule is never called a particle. True or False ?
Answer: False; it contains particles, but that doesn't mean it's a particle itself.
Hope this help.
The statement is false, both atoms and molecules could be referred to as particles.
An atom is defined as the smallest particle of a substance that can take part in a chemical reaction.
An atom is the smallest particle of a an elemental substance while a molecule is the smallest particle of a compound. Compounds are made up of molecules which are neutral particles.
The main difference between an atom and a molecule is that a molecule is a group of atoms held together by a chemical bond while atoms just occur individually.
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Help me I'm almost finished with this
Answer in 1234 statement or ABCD
Answer:
The liquid in beaker 1 has a higher density than the liquid in beaker 2.
20 points (picture) thanks :) + brainliest if right
Answer:
B
Explanation:
What makes a triangle similar?
A :Congruent angles and not proportional sides.
B: Congruent angles and proportional sides.
C :Not congruent angles.
D :They have to be the exact
same size.
when we don't use prefixe ina binary compound
Answer:
Explanation:
Answer will be wrong
3. How many different atoms are there in a compound?
A. one
C. two or more
B. always two
D. none of these
Answer: C
Explanation:
Electron configuration for Bohr model for sodium is
Answer: The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1.
Explanation:
Which elements likely conduct electricity well? Check all that apply.
chromium
iodine
carbon
calcium
osmium
Chromium, carbon and calcium
I did the same quiz and got a 100 (Brainliest pls)
Chemical formula for CrO
Answer:
Chromium oxide
Explanation: