Answer:
So, the melting of wax and vapourisation of melted wax are physical changes. Chemical Changes : The wax near flame burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light. LPG is another example of a familiar process in which both the chemical and physical changes take place.
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You are required to write a MINIMUM of 5 sentences. This means you can always do more than 5 sentences, but no less.
I will not be grading your spelling or grammar. I'm looking for Science vocabulary and understanding of the concepts..
(minimum of five sentences. If you can't count five sentences then write some more)
We have been talking about plant and animal cells these past weeks. Plant cells have two organelles that animal cells do not contain. Name the two organelles that can be found in plant cells but not in animal cells and describe what each of those organelles do.
Plant cell Organelles
Cell wall : The outer most covering of the plant cell is the cell wall. The main constituent of it is cellulose. The main functions of the cell wall are, to maintain the shape of the cell, support and protection of the cell.Chloroplasts : Chloroplasts are organelles that conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells.Do polar molecules conduct energy as well as ionic molecules?
Answer:
Polar covalent compounds can not conduct electricity. But when they are dissolved in water, then they are capable of conducting electricity as the electrons will be free to conduct electricity.
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Which statement correctly classifies gamma emission?(1 point)
Gamma emission is not a type of radioactive decay or a fission reaction.
Gamma emission is not a type of radioactive decay, but it is a fission reaction.
Gamma emission is a type of radioactive decay, but it is not a fission reaction.
Gamma emission is a type of radioactive decay that is also a fission reaction.
Answer:
Gamma emission is a type of radioactive decay, but it is not a fission reaction.
Explanation:
BOOM
Do you think more foam will form if the ice cream is added to the glass before the root beer or after the root beer?
Answer:Sure, any carbonated soda will create bubbles when it's poured into a glass, but just add ice cream and a root beer float foams up like nothing else!
Explanation:
the ___is the area that allows us to pinpoint the location of pain, identify a texture and be aware of how our limbs are positioned?
Answer:
The somatosensory cortex is a region of the brain which is responsible for receiving and processing sensory information from across the body, such as touch, temperature, and pain.
Area 1 specifically is important in sensing the texture of an object. :)
Hope this helps!
Which statement accurately describes how electrical power and current are related
Answer:
Electrical power is the product of voltage times current.
Among the elementary subatomic particles of physics is the muon, which decays within a few nanoseconds after formation. The muon has a rest mass 206.8 times that of an electron.
Calculate the de Broglie wavelength associated with a muon traveling at a velocity of 8.50×105 cm/s .
The De Broglie wavelength of the muon is calculated to be 4.13 × 10^10 m
We have the following information;
mass of the muon (m)= 206.8 × 9.11 × 10^-31 Kg = 1.88 × 10^-28 Kg
Plank's constant(h) = 6.6 × 10^-34 Js
Velocity of the muon(v) = 8.50×10^5 cm/s or 8500 m/s
From;
λ = h/mv
λ = 6.6 × 10^-34/1.88 × 10^-28 × 8500
λ = 6.6 × 10^-34/1.598 × 10^-24
λ = 4.13 × 10^10 m
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the formula for sodium hydroxide is NaOH; the formula for potassium hydroxide is KOH. which two elements do you think are contained in all hydroxides? pls and as soon as possible thks:)
Answer:
oxygen and hydrogen :)
Explanation:
you are assisting in taking a final impression of a patient's mandibular arch, using an automix material. after transferring the syringe material to the dentist, you ready the heavy-bodied material for the tray. while preparing the tray, the cartridge runs out of material before the tray is completely filled. what could have prevented this? what should you do now?
Answer:
i
Explanation:
What makes up soil???????
Answer:
Soil is a material composed of five ingredients — minerals, soil organic matter, living organisms, gas, and water. Soil minerals are divided into three size classes — clay, silt, and sand (Figure 1); the percentages of particles in these size classes is called soil texture.
Explanation:
In which state particles are extremely cold just above absolute zero (–273 °C or 0 K) and barely move?
helppppp
Answer:
At zero kelvin (-273°C) the particles stop moving and all disorder disappears. Therefore, nothing can be colder than absolute zero on the Kelvin scale.
What isotope has a mass of 79 and 44 neutrons?
Answer:
bromine
Explanation:
The atomic mass of bromine (Br) is 79.90. There are two main isotopes at 79 and 81, which average out to the 79.90amu value. The 79 has 44 neutrons and the 81 has 46 neutrons. While it won't change the average atomic mass, scientists have made bromine isotopes with masses from 68 to 97.
Colleen was working in science class and mixed baking soda and vinegar. She observed a lot of
bubbles formed and went over the top of her test tube. Which of the following is the best
evidence that a chemical reaction occurred during this experiment?
O a precipitate formed
O formation of a gas
o change in color
o change in shape
The formula for density is
Answer: d=m/v
Explanation: The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Why are polymers insoluble in sodium bicarbonate?
Answer:
The term “polymers” covers a pretty broad range.
For a polymer to be soluble in any water solution it has to have a degree of polar functionality. This can be such things as acid functions or hydroxyl functions. A co-polymer containing a large amount of methacrylic acid would be soluble in a bicarb solution.
If you are thinking of polymers such as polyethylene or polystyrene then there is no functionality to be neutralized which would render them soluble.
Explanation:
( Source : Quora )
If a 125 micron tissue slice is 125 µm thick, what is the thickness in inches?
Answer:
125 micrometres is 0.125 mm or 0.0125 cm or 0.000125m convert from cm to inches and u have the answer
The thickness of a 125 µm tissue slice is approximately 0.00492 inches.
Micron (µm) is a unit of length commonly used to measure very small distances, particularly in scientific and medical contexts. To convert microns to inches, you can use the conversion factor that 1 inch is equal to 25,400 microns (1 inch = 25,400 µm).
Given that the tissue slice is 125 µm thick, you can use the conversion factor to find its thickness in inches:
Thickness in inches = Thickness in microns / Conversion factor
Thickness in inches = 125 µm / 25,400 µm/inch
Thickness in inches ≈ 0.00492 inches
So, the thickness of the 125 µm tissue slice is approximately 0.00492 inches. This conversion is important for understanding the dimensions of microscopic samples and for making comparisons with measurements in other units, especially when working with scientific data and research.
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defined the term oleum
Answer:
A solution of sulfur trioxide in sulfuric acid.Explanation:
HOPE IT HELP ✌️Describe how you can figure out how many grams of a COMPOUND if you know how many moles there
are.
How many subshells in 4s
Answer:
hhjkjggghjjjjjj
Explanation:
vbjjkkkkkkkj
What is the molarity of a solution that contains 4.53 moles of lithium nitrate (LiNO3) in 2.85 liters of solution
Answer:
M= ml - 45301 - 11.59M.
Explanation:
Which pattern in electronegativity do elements in the periodic table display?
Electronegativity increases from left to right within a row of the periodic table.
Electronegativity decreases from left to right within a row of the periodic table.
Electronegativity is lowest on the left and right sides of the periodic table, and highest in the middle of a row.
Electronegativity is highest on the left and right sides of the periodic table, and lowest in the middle of a row.
Answer:
Electronegativity increases from left to right within a row of the periodic table
Explanation:
Which of the following statements is true about the strength of the intermolecular forces in CH4 and NH3?
a.CH4 ≥ NH3 because CH4 is tetrahedral but NH3 is pyramidal.
b.CH4 < NH3 because δ− on C in the CH bond is greater than δ− on N in the NH bond.
c.CH4 < NH3 because the NH bond is more polar than the CH bond.
d.CH4 ≥ NH3 because CH4 has H bonding but NH3 has dispersion forces.
Answer:
c.CH4 < NH3 because the NH bond is more polar than the CH bond.
Explanation:
Attends and animals shown in the cagam.
babies
Aer connecting the battery to the wire the student brings a few pieces of iron near the iron mall Which statement describes what will hapen to the tro pieces?
The battery behaves e a magnet that repels the pieces of iron
The ironnal behaves e a masnet that attracts the pieces of iron
Theron produces electric current that attracts the pieces of iron
The coil rotates which produces electric current that repels the pieces of iron
O
Answer:
666
Explanation:
A compound of mercury and oxygen is heated in order to decompose the compound. A 4.08 grams sample of mercury oxide upon heating gives off oxygen gas. After heating the mass of mercury metal left behind was 3.78 grams. Calculate the empirical formula of the compound
My and: 1 O2 to 2 Hg ratio but I don't know if it's correct and if so if I should write it as
2HgO ----> 2Hg + O2 or just 2Hg + O2
Please someone who understands help.
Answer:
HgO (empirical formula)
Explanation:
4.08 - 3.78 = 0.3g (oxygen)
[tex] (\frac{4.08}{201}) \: \: \: (\frac{0.3}{16} )[/tex]
0.02 : 0.02
0.02/0.02 : 0.02/0.02
1 : 1 (ratio)
HgO ( empirical formula)
2HgO ----> 2Hg + O2 ( your equation correct)
Để pha 2 lít dung dịch H2SO4 0,1N từ axit đặc 98% (d 1.84g/ml). Cần lấy bao nhiêu ml acid đặc
Answer:
Cm = Cn/n = 0.1/2 = 0.05 (M)
n = 0.05*2= 0.1 mol
m H2SO4= 0.1*98= 9.8 g
m dd H2SO4= 9.8/ 0.98 =10 g
V= 10/ 1.84 = 5.435 ml
Explanation:
what are empirical observations?
Answer:
Empirical evidence for a proposition is evidence, i.e. what supports or counters this proposition, that is constituted by or accessible to sense experience or experimental procedure. Empirical evidence is of central importance to the sciences and plays a role in various other fields, like epistemology and law.
Explanation:
thanks me later
AcipHex is classified as
Answer:
vdhdjdkkdhd djjsbdmskskdkdj djdkkdjdjdj kdkkdkdkdk
Which season is signaled by warmth and new life after a cold period?
1. winter
2. summer
3. spring
4. fall
The season that is signaled by warmth and new life after a cold period is the spring season.
There are four seasons of the year; winter, spring, summer and autumn(fall). In these four seasons, the coldest season is the winter season which is characterized by extreme temperatures and snow.
Immediately after this extremely cold season comes the spring which is a warm season. In this season, plants begin to blossom again as the rains begin to fall.
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Mg + HCl MgCl2 + H2
Double replacement – two compounds switch parts with one another.
AgNO3 + K2SO4 Ag2SO4 + KNO3
Answer:
Mg + 2 HCl = MgCl2 + H2
2 AgNO3 + K2SO4 = Ag2SO4 + 2 KNO3
Explanation:
If the density of a liquid is 20g/mL and the volume is 70mL, what is the mass?
Answer:
mass= volume ×density
20×70=1400 g