Answers
Answer:
hexagon
Explanation:
Answer:
um how is this a question? is there no info on how many protons neutrons electrons and what elements are in the compound. how do you find out a compound if you don't know what the elements in it are
Related Questions
Find the initial temperature of 45.0g of water if its final Temperature after submerging a metal with the mass of 8.5g is 22.0°C . The initial temperature of metal before submerging it to water is 82.0°C
Answers
The initial temperature of the water that resulted in the final temperature of the water-metal mixture is 20.7 ⁰C.
"Your question is not complete, it seems to be missing the following information;"
the specific heat capacity of the metal is 0.45 J/g⁰C.
The given parameters;
mass of water, [tex]m_w[/tex] = 45 gfinal temperature of the water, [tex]t_w[/tex] = 22 ⁰Cmass of the metal, m = 8.5 ginitial temperature of the metal, t = 82 ⁰C.specific heat capacity of the metal, c = 0.45 J/g⁰C.The initial temperature of the water will be calculated by applying the principle of conservation of energy;
heat gained by water = heat lost by metal
[tex]Q_{water} = Q_{metal}[/tex]
[tex]m_wc_w \Delta t_w = mc\Delta t[/tex]
where;
[tex]c_w[/tex] is the specific heat capacity of the water = 4.184 J/g⁰C.
Substitute the given values;
45 x 4.184 x (22 - t) = 8.5 x 0.45 x (85 - 22)
4142.16 - 188.28t = 240.98
188.28t = 4142.16 - 240.98
188.28t = 3901.18
[tex]t = \frac{3901.18}{188.28} \\\\t = 20.7 \ ^0 C[/tex]
Thus, the initial temperature of the water that resulted in the final temperature of the water-metal mixture is 20.7 ⁰C.
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Which statement accurately describes how electrical power and current are related
Answers
Answer:
Electrical power is the product of voltage times current.
How to Study and make notes and what to do if everything seems important
Answers
PLEASE HELP ME!!!!! I NEED REAL HELP PLEASE I KEEP GETTING NON REAL ANSWERS!!
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.
Answers
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.What makes up soil???????
Answers
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:
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.
Answers
Answer:
c.CH4 < NH3 because the NH bond is more polar than the CH bond.
Explanation:
In which state particles are extremely cold just above absolute zero (–273 °C or 0 K) and barely move?
helppppp
Answers
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.
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
Answers
Answer:
666
Explanation:
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:)
Answers
Answer:
oxygen and hydrogen :)
Explanation:
Why are polymers insoluble in sodium bicarbonate?
Answers
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 )
AcipHex is classified as
Answers
Answer:
vdhdjdkkdhd djjsbdmskskdkdj djdkkdjdjdj kdkkdkdkdk
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?
Answers
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:
what are empirical observations?
Answers
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
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?
Answers
Answer:
i
Explanation:
3
Convert 5.492 x 104 grams to units of micrograms.
(Click to select 4
x 10
ug
Answers
Answer:
5.492*10^10
Explanation:
1g=1000000microgram
defined the term oleum
Answers
Answer:
A solution of sulfur trioxide in sulfuric acid.Explanation:
HOPE IT HELP ✌️What is the molarity of a solution that contains 4.53 moles of lithium nitrate (LiNO3) in 2.85 liters of solution
Answers
Answer:
M= ml - 45301 - 11.59M.
Explanation:
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
Answers
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?
Answers
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!
I will mark brainlist please help
1) What is the concentration of a solution that contains 6 moles of solute in 2 liters of solution
• 6M
• 12M
• 7M
• 3M
2) what is the number of moles of solute in 250 mL of a 0.4M solution?
• 0.1 mol
• 0.16 mol
• 0.62 mol
• 1.6 mol
3) the molality of a solution containing 8.1 moles of solute in 4847 g of solvent is
• 39m
• 1.7m
• 0.17m
• 598m
4) which of the following is unchanged when a solution is diluted by addition of solvent?
• volume of solvent
• mass of solvent
• number of moles of solute
• molarity of solution
Answers
Answer:
1)3M
2)0.1 moles
3)1.7m
4) number of moles of solute
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.
Answers
Answer:
Electronegativity increases from left to right within a row of the periodic table
Explanation:
Để pha 2 lít dung dịch H2SO4 0,1N từ axit đặc 98% (d 1.84g/ml). Cần lấy bao nhiêu ml acid đặc
Answers
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:
Which season is signaled by warmth and new life after a cold period?
1. winter
2. summer
3. spring
4. fall
Answers
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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Describe how you can figure out how many grams of a COMPOUND if you know how many moles there
are.
Answers
The formula for density is
Answers
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.
Help
Mg + HCl MgCl2 + H2
Double replacement – two compounds switch parts with one another.
AgNO3 + K2SO4 Ag2SO4 + KNO3
Answers
Answer:
Mg + 2 HCl = MgCl2 + H2
2 AgNO3 + K2SO4 = Ag2SO4 + 2 KNO3
Explanation:
From its position in the periodic table, determine which atom in each pair is more electronegative: (a) N or P (b) N or Ge (c) S or F (d) Cl or S (e) H or C (f) Se or P (g) C or Si
Answers
Answer:
p, get, s, s, c, se, SIse hhgggggggg I no
Answer:
1) Cl
2) O
3) O
4) S
5) N
6) P
7)N
Explanation:
What does the number of
protons tell us about an
element?
Answers
Answer:
it determines an element's atomic number..
Calculate the Gibbs Free-Energy and the standard Gibbs Free-
Energy by the cell in the given cell notation: Zn(s) |Zn2+(aq) || H+(aq)| H2(g) |Pt (s)
When [Zn+2] = 4.0 x 10 -3 M, [H2] = 0.010 M, [H+] = 1.0 M
PLEASE ANSWER THIS ILL GIVE MANY POINTS
Answers
[tex]\bull\sf \Delta H=4.0\times 10^{-3}M[/tex]
[tex]\bull\sf T=0.010M[/tex]
[tex]\bull\sf \Delta S=1.0M[/tex]
[tex]\\ \bull\sf\longmapsto \Delta G=\Delta H-T\Delta S[/tex]
[tex]\\ \bull\sf\longmapsto \Delta G=0.004-0.01(1)[/tex]
[tex]\\ \bull\sf\longmapsto \Delta G=0.004-0.01[/tex]
[tex]\\ \bull\sf\longmapsto \Delta G=-0.006J[/tex]
What isotope has a mass of 79 and 44 neutrons?
Answers
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.