Answer:
687.974 is your answer
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
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:
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
Answer:
1)3M
2)0.1 moles
3)1.7m
4) number of moles of solute
2. How many GRAMS of boron trichloride are present in 2.26*10^22 molecules of this compound?
___ grams.
Answer:
1.17x1024 molecules 2) 0.13 moles
Explanation:
hope this helps
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.
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!
Help
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:
defined the term oleum
Answer:
A solution of sulfur trioxide in sulfuric acid.Explanation:
HOPE IT HELP ✌️I got tha last one wrong Wha this one ?
Answer:
I think 10.5 or 10.55
Explanation:
Hope this helps :)
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.
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.Describe how you can figure out how many grams of a COMPOUND if you know how many moles there
are.
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
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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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:
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:
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
Please select the word from the list that best fits the definition
The compound, CH3COOH, is an example of which type of organic compound?
alcohol
amine
amino acid
carboxylic acid
Answer:
carboxylic acid
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How to Study and make notes and what to do if everything seems important
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:
During oxidation of ethanol to ethanol, the ethanol formed was found to be contaminated with unconverted ethanol, describe how you would obtain ethanal free from ethanol
Answer:
Ethanol is oxidised by acidified sodium dichromate in a test tube reaction, firstly to form ethanal (acetaldehyde), and with further oxidation, ethanoic acid (acetic acid)
Procedure
Place about 3 cm3 of acidified sodium dichromate solution in a boiling tube.
Use a teat pipette to add 5–7 drops of ethanol, with shaking.
Cool the mixture in the tube under a tap. Note the sweetish smell of ethanal (acetaldehyde) at first, then becoming sharper as oxidation continues and forms ethanoic acid (acetic acid).
When the reaction has subsided, the mixture can be warmed gently; the smell of ethanoic acid will become more noticeable.
The process of how we would obtain ethanal free from ethanol is described in the explanations below.
In Chemistry, Ethanol undergoes oxidation in the presence of sodium dichromate plus sulphuric acid to yield ethanal and water.
The procedure for achieving this in the laboratory is as follows;
Step 1; Measure a quantity of a solution of sodium dichromate acidified in a dilute sulphuric acid and pour into a test tube.Step 2; Add excess ethanol. This is because if we don't do so there will be plenty of oxidizing agent to carry out a second operation which changes the aldehyde to ethanoic acid. However, we need only the aldehyde. Step 3; When the aldehyde ethanal begins to form which will be evident by the change in the colour of solution from orange to green, then the mixture should be distilled from the test tube and tbethe aldehyde collevted so that it doesn't undergo additional oxidation into ethanoic acid.Read more at; https://brainly.in/question/18574624
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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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
[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]
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:
What does the number of
protons tell us about an
element?
Answer:
it determines an element's atomic number..
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:
AcipHex is classified as
Answer:
vdhdjdkkdhd djjsbdmskskdkdj djdkkdjdjdj kdkkdkdkdk
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:
3
Convert 5.492 x 104 grams to units of micrograms.
(Click to select 4
x 10
ug
Answer:
5.492*10^10
Explanation:
1g=1000000microgram
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.
In 1–2 sentences, explain why weather can be predicted only as probable, not definite.
Answer:
Meteorologists use computer models to predict the weather. And computational power has come an extended way. Yet meteorologists still have trouble correctly predicting the weather over some days. Sometimes they don’t even comprehend right over 24 hours! Why does this happen? Their ability to predict the weather is restricted by the number of available data, the time available to research it, and therefore the complexity of weather events.
Explanation:
Expressing personal ability to predict weather is limited by the amount of data available, the amount of time available to research it, and thus the complexity of weather events.
What is weather forecasting?Weather forecasting is the prediction of the weather using physics principles supplemented by a variety of statistical and empirical techniques.
The goal of weather prediction is to provide information that people and organizations can use to reduce weather-related losses.
It also improve societal benefits such as life and property protection, public health and safety, and economic prosperity and quality of life.
As much information as possible about the current weather and the state of the atmosphere is gathered.
Temperature, pressure, humidity, and wind speed observations are collected from around the world and fed into powerful supercomputers.
Three factors limit the ability to predict the weather:
The amount of available data.The time available to analyze it.The complexity of weather events.Thus, weather can be predicted only as probable, not definite.
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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.
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: