If an object has a density of 0.55 g/mL, what is its density in g/L (PLEASE HELP)
Answer:
glycerin
Explanation:
the amind acid of glycrine is 0.18 g/MLA.
True or False: When you measure something with a ruler, you should NOT estimate an extra digit. You only need to report the numbers you see on the ruler.
Answer:
False
Explanation:
It is important to give exact measurements.
Which molecule has a single covalent bond between its atoms?
[Proton number: He=2, N=7, O=8, F=9]
Answer:
F
Explanation:
Helium (He) has 2 protons. Since the number of protons and electrons are the same, it also has 2 electrons. This means that it's first electronic shell is full and the particle is stable. There is no bonding between these atoms to form molecules.
Nitrogen (N) has 7 protons which is also 7 electrons. After filling the first shell (2), it will still have 5 electrons. The atom will share 3 electrons with another nitrogen atom. This will form 3 covalent bonds.
Oxygen (O) has 8 protons which is also 8 electrons. After filling the first shell (2), it will still have 6 electrons. The atom will share 2 electrons with another oxygen atom. This will form 2 covalent bonds.
Fluorine (F) has 9 protons which is also 9 electrons. After filling the first shell (2), it will still have 7 electrons. The atom will share 1 electron with another fluorine atom. This will form 1 covalent bond aka a single covalent bond.
When inspecting containers, what tool is used to determine weld serviceability and the severity of corrosion?
Answer:
Welder’s hammer
Explanation:
Welders hammer is a type of hammer which has two parts in which one is a flat surface and the other is slightly pointed.
It is used in the removal of different types of splatters which are often associated with welding works.
It is also used as a tool during the inspection containers in order to determine weld serviceability and the severity of corrosion.
Atoms are made up of protons,
neutrons, and electrons.
Is that a fact, hypothesis, law or theiry
Answer:
It's a fact
Explanation:
3) Two plants are grown using the same light and pots. One plant is given water that has been
microwaved and the other plant is given regular tap water. Their height is measured after 2 weeks.
What are the independent and dependent variables?
Answer:
Independent variable- nature of irrigation water
Dependent variable- height of the plants
Explanation:
In every study, there must be an independent and a dependent variable. The dependent variable changes its value as the value of the independent variable changes.
When the nature of irrigation water is manipulated, the height of the plant changes accordingly. This implies that the nature of irrigation water (microwaved or tap water) is the independent variable while the height of the plant (the response) is the dependent variable.
When you freeze water, it turns to ice. What process is this? *
Answer:
Freezing
Explanation:
Freezing is the process in which a liquid changes to a solid. It occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them. The freezing point of a substance is the temperature at which it freezes. The freezing point of pure water is 0°C.
Answer:
freezing
Explanation:
Once it gets cold enough (around 32 degrees Fahrenheit), the expanding water molecules begin to form ice crystals. This spreading-out of water molecules as it freezes is why sometimes a bottle full of water will break when you freeze it. The fact that water expands when frozen is also really important to life on Earth.
What is the percent yield for a certain reaction when 56.8 g of product was
obtained in the lab, but the theoretical yield was 64.4g?
Answer:
88.20%
Explanation:
% yields =( experimental yield /theoretical yield )x100%
= ( 56.8 ÷ 64.4 ) x100%
= 88.20%
The percent yield for the given reaction where in the product obtained is 56.8 g is 88.19%.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .In the given example , percent yield=56.8/64.4×100=88.19%.
Thus, the percent yield of reaction is 88.19 %.
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“The mixture is green in color.” This confirms that the mixture is a.... A) suspension B) solution C) colloid D) this proves nothing
SOLVE The density of a gas is 0.68 g/mL. What amount of space would 23.8 g of this gas occupy?
Answer:
The answer is 35 mLExplanation:
Density of a substance can be found by using the formula
[tex]Density(\rho) = \frac{mass}{volume} [/tex]
From the question we are finding the amount of space the gas will occupy that's the volume of the gas
Making volume the subject we have
[tex]volume = \frac{mass}{Density} [/tex]
From the question
mass = 23.8 g/mL
Density = 0.68 g/mL
Substitute the values into the above formula and solve
That's
[tex]volume = \frac{23.8}{0.68} [/tex]
We have the final answer as
35 mLHope this helps you
what is the definition of a radical
Answer:
Molecule that contains at least one unpaired electron is called a radical.
Answer:
In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron. With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize. Most organic radicals have short lifetimes.
The magnesium atom has 12 electrons arranged 2,8,2. What must the atom do to become stable? gain 6 electrons a.lose 6 electrons b.gain 2 electrons c.lose 2 electrons
Answer:
The answer is Gain 6 electrons.
Explanation: The reason for this is that for electrons to be stable, you need a valence shell of 8 electrons. Since it is arranged 2, 8, 2 , the outer shell is 6 less than 8 meaning it needs to gain 6 electrons.
answer the following question how will you determine if harmful microorganisms are produced in bread or fruit
Answer:
ur dumb
Explanation:
A desk measures 42 inches long. How many meters is that?
Answer:1.067
Explanation:
look it up
1. In which state of matter can the particles move fast freely? 2. In which state of matter are the particles closet together? 3. Sketch a simple diagram to compare the arrangement of the particles in 1 and 2.
Explanation:
1. Particles in the gaseous form can move freely because it is widely spread out.
2. Particles in solid are the tightly packed
How to make baking powder
Answer:
nahco3
Explanation:
Which subatomic particle weighs virtually zero? Electron Neutron Proton
Answer:
1) Electron
Explanation:
The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom.
Displayed formula of 2nonene
True or False: In every gram of sucrose (table sugar) there is 0.513 g of oxygen
Answer:
True
Explanation:
Step 1: Find molecular formula of sucrose
C₁₂H₂₂O₁₁
Step 2: Convert moles of oxygen present to grams
1 mol O = 16 g O
11 mol O = 176 g O
Step 3: Find molar mass of sucrose
C - 12.01 g/mol
H - 1.01 g/mol
O - 16.00 g/mol
12.01(12) + 22(1.01) + 11(16.00) = 342.34 g/mol C₁₂H₂₂O₁₁
Step 4: Set up dimensional analysis
[tex]1 gC_{12}H_{22}O_{11}(\frac{176 gO}{342.34gC_{12}H_{22}O_{11}} )[/tex]
Step 5: Multiply/Divide and cancel out units
Grams of C₁₂H₂₂O₁₁ and grams of C₁₂H₂₂O₁₁ cancel out.
We are left with grams Oxygen
176/342.34 = 0.514109 grams Oxygen
the chloride of a metal M contains 47.25% of metal 1.0 gram of metal would be displaced from a compound by 0.88 gram of another metal N . find the equivalent weight of M and n.
Answer:
The equivalent weight of M is approximately 31.8 g
The equivalent weight of N is approximately 27.98 g
Explanation:
The given parameters are;
The percentage of the the metal M in in the chloride = 47.25%
Where by the chemical formula for the metal chloride is MClₓ, we have;
47.25% of the mass of MClₓ = Mass of M = W
Therefore, we have;
[tex]\dfrac{0.4725}{W} = \dfrac{1}{W + 35.5 \cdot x}[/tex]
0.4725 × (W + 35.5·x) = W
0.4725·W + 0.4725×35.5×x = W
W - 0.4725·W = 16.77·x
0.5275·W = 16.77·x
W/x = 16.77/0.5275 = 31.799 = The equivalent weight of M
The equivalent weight of M = 31.799 ≈ 31.8 g
Given that 1 gram of M is displaced by 0.88 gram of N, then the equivalent weight of N that will displace 31.799 = 0.88 × 31.799 ≈ 27.98 g
The equivalent weight of N = 27.98 g.
Iron has a density of 7.87mL. How much mass would a 12.3mL sample contain?
The correct answer is 96.80 grams
Explanation:
The density of a substance shows the total mass the substance contains in 1 mL or 1 cm3 as density is calculated by using the formula D= M (mass) / V (volume). This implies, Iron contains 7.87 grams per milliliter. Moreover, this value and formula can be used to calculate the mass or volume of any other sample. The process to calculate the mass of an iron sample with a volume of 12.3 mL is shown below.
D = M ÷ V
7.87 mL = x ÷ 12.3 mL - x represents the missing value. Now find the value of x by solving the equation
x = 7.87 · 12.3
x = 96.80
This means a sample of 12.3 mL contains a mass of 96.80 grams. Also, you can know this value is correct because if you divide the mass by the value the density is the same (96.80 grams ÷ 12.3 mL = 7.87 g/mL)
which is a example of a three dimensional measurement of volume a. 120 cubic meters b. 120 grams c. 120 miles per hour d. 120 units pls help I'm not smart
Answer:
120 cubic meters
Explanation:
Three-dimensional measurement is basically any unit of measurement cubed. Since grams is just to the first power, it is not considered three-dimensional. miles per hour is a fraction, so it is not a three-dimensional measurement of volume. 120 units are to the first power, so you are left with 120 cubic meters, which is a three-dimensional measurement of volume. Also, another way to solve this is to look at the types of measurement. The cubic meter is a measure of volume. Grams are a measurement of mass. Miles per hour is a measurement of speed. Units can be any type of measurement because you can substitute units instead of any measurement in questions.
The first periodic table was organized according to atomic mass, but the current periodic table is arranged according to atomic number. What is the difference between atomic mass and atomic number, and why is the atomic number now the basis for the periodic table?
Answer: Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus. It is the average weight of an element. It is the total number of nucleons in the atom's nucleus.
Assuming there were errors in atomic masses, Mendeleev placed certain elements not in order of increasing atomic mass so that they could fit into the proper groups (similar elements have similar properties) of his periodic table.
- Have a nice day :)
Every object in the universe experiences some sort of force. It could be gravity holding Earth in orbit around the sun, or it could be someone sliding a chair across the floor. What best describes a force?
Answer:
See explanation
Explanation:
A force may be defined as a push or pull on an object as a result of its interaction with another object.
Thus, interaction between two objects is only possible because of the action of a force on each of the objects due to interaction between the objects.
For instance, the earth remains in its orbit due to the gravitational force of attraction between the earth and the sun. Many more examples of forces abound in science.
Equal masses of water undergo condensation, deposition, evaporation, and sublimation. a) Which process releases the most energy? b) Which process absorbs the most energy?
Answer:
A. Condensation
B. Evaporation
Explanation:
Condensation releases energy when water vapor condenses to form water droplets. Evaporation absorbs energy whenever it changes from liquid to gas, the heat from the sun heats the water up and absorbs energy.
What would be the new pressure if 250cm3 of gas at standard pressure is compressed to a volume of 150 cm3
Answer:
5/3 or 1 2/3 atmospheres.
Explanation:
If the temperature is kept constant then P*V will be constant.
The standard pressure is 1 Atm. so:
250 * 1 = 150 * V
V = 250 / 150
= 5/3 Atm.
The new pressure of gas is 126.66 mm Hg at constant temperature according to Boyle's law.
What is Boyle's law ?
Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,
P₁V₁=P₂V₂
∴P₂=760×250/150=126.66 mm Hg
Therefore, the final pressure of the gas is 126.66 mm Hg.
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What are the limitations of J.J. Thomson's model of the atom?
Explanation:
thanks for the points big man
Question 9 of 10
A team of engineers has decided to design a new shoe for people suffering
from a painful foot condition. What should the engineers do during the
planning stage of their project?
A. Look at the trial's results to see how the design can be improved.
O B. Estimate how much potential consumers would be willing to pay
for this new shoe.
C. Have patients wear the new shoe in an experimental trial to see if
symptoms improve.
D. Build a variety of shoe models.
In the reaction of silver nitrate with sodium chloride, how many grams of silver chloride will be produced from 100. g of silver nitrate when it is mixed with an excess of sodium chloride? The equation for the reaction is below. AgNO3 + NaCl → AgCl + NaNO3
Answer:
The mass in grams of silver chloride, AgCl produced is 84.37 grams
Explanation:
The chemical equation for the reaction is given as follows;
AgNO₃ + NaCl → AgCl + NaNO₃
The mass of silver nitrate, AgNO₃, in the reaction = 100.0 g
Therefore, 1 Mole of AgNO₃ produces 1 mole of AgCl,
The molar mass of silver nitrate, AgNO₃ = 169.87 g/mol
The number of moles of silver nitrate, AgNO₃, in the reaction = 100/169.87 moles
The number of moles of silver nitrate, AgNO₃, in the reaction ≈ 0.59 moles
Since 1 mole of AgNO₃ produces 1 mole of AgCl, 0.59 moles of AgNO₃ produces 0.59 moles of AgCl
The number of moles of silver chloride, AgCl produced = 0.59 moles
The molar mass of silver chloride, AgCl = 143.32 g/mol
Therefore;
The mass of silver chloride, AgCl produced = The number of moles of silver chloride, AgCl produced × The molar mass of silver chloride, AgCl
Which gives;
The mass of silver chloride, AgCl produced = 143.32 g/mol × 0.59 moles = 84.37 g
The mass of silver chloride, AgCl produced = 84.37 g.
The mass of silver chloride produced is 84.37g.
The equation of the reaction is; AgNO3 + NaCl → AgCl + NaNO3
Number of moles of silver nitrate = mass of silver nitrate/Molar mass of silver nitrate
Molar mass of silver nitrate = 170 g/mol
Number of moles of silver nitrate = 100 g/170 g/mol = 0.59 moles
Mass of silver chloride = 0.59 moles × 143 g/mol = 84.37g
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As an organism begins to learn more and more about its environment, it will begin to construct a complex mental representation of that data called a _____
Latent map
Cognitive redux
Cognitive map
Latent redux
Answer:
Cognitive map
Explanation:
A cognitive map is a mental representation of one's physical environment.
Cognitive Map
Explanation:
As an organism begins to learn more and more about its environment, it will begin to construct a complex mental representation of that data called a Cognitive Map