Answer:
What is the density of a 40g object that has a volume of 2ml
Explanation:
20 g/mL
volumemassdensityThe density of a 40g object that has a volume of 2ml is 20g/ml. Details about density can be found below.
How to calculate density?The density of a substance refers to the measure of the mass of matter contained by a unit volume.
The density of a substance is calculated by dividing the mass of the substance by its volume.
According to this question, a 40g object has a volume of 2ml. The density is calculated as follows:
Density = 40g ÷ 2mL
Density = 20g/mL.
Therefore, the density of a 40g object that has a volume of 2ml is 20g/mL.
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which has the least amount of decimal places? 0.062 or 16.32?
16.32 has the least amount of decimal places
Answer:
16.32
Explanation:
Yes its a larger number however, If you were to move the decimal point to the end of each number then 16.32 would be moved the least.
What is the net charge of an ion that has 11 protons 10electrons and 12 neutrons
Answer:positive
Explanation: because there are more protons than electrons in the ion
What happens when current flows through a wire?
Answer: Two effects may occur during high current flow: 1) the wire may become overheated to the point that surface oxidation or even evaporation may take place, 2) at the connection points at each end of the wire, especially if the terminations are of a different type of metal than the wire, some atoms may migrate into or out of the wire.
What do we call the stars whose properties follow the patterns?
Answer:
It is called Asterism.
Explanation:
It is Asterism because Asterism refers to a pattern of stars that are seen in night sky and are very distinctive and identifiable. These group of starts have patterns. It visually seen collection of stars and it's indicate their properties and the lines that connect the stars together. It actually range from small shapes of stars to more complex stars that cover segment of the sky. The stars may be bright naked or have similar brightness.
is mesosphere is where most of meteoroids begin to burn?
Answer:
The mesosphere is 22 miles (35 kilometers) thick. ... Those meteors are burning up in the mesosphere. The meteors make it through the exosphere and thermosphere without much trouble because those layers don't have much air. But when they hit the mesosphere, there are enough gases to cause friction and create heat.
Answer:
Meteoroids urn up in mesosphere because there are a lot of gases that cause friction. Friction causes heat, hence meteoroids burn in mesosphere.
HELP ME PLEASE Using the group and period numbers, Identify the elements that are located in each of the following locations. a. The element in group 10 and period 5 = b. The element in group 15 and period 4 = c. The element in group 2 and period 3 = d. The element in group 18 and period 6= e. The element in group 1 and period 7 =
Answer:
a: palladium or Pd
b: arsenic or As
c: magnesium or Mg
d: radon or Rn
e: francium kr Fr
Explanation:
i looked at the periodic table haha
a. The element in group 10 and period 5 is palladium or Pd. b. The element in group 15 and period 4 is arsenic or As. c. The element in group 2 and period 3 is magnesium or Mg. d. The element in group 18 and period 6 is radon or Rn. e. The element in group 1 and period 7 is francium or Fr.
What is an element ?A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.
A substance is considered to be an element if it cannot be reduced to a less complex form. They can be identified by their particular atomic number. The periodic table groups the elements according to their atomic number and draws attention to those with related qualities.
Each element's atom contains a specific number of protons. For instance, a carbon atom has six protons compared to the one proton in a hydrogen atom. Ions are created by changing the number of electrons in an element's atom.
Thus, The element in group 10 and period 5 is palladium or Pd.
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As the result of experimental work, a student finds the density of a liquid to be 0.1369 g/mL. The known density of that liquid is 0.1478 g/mL. What is the percent error of this student's work [% error = (actual - experimental)/actual. Then multiply by 100]. Sig figs apply.
a 0.07374%
b 7.37%
c 7.375%
d 7.4%
Answer:
The answer is option CExplanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual density = 0.1478 g/mL
error = 0.1478 - 0.1369 = 0.0109
The percentage error is
[tex]P (\%) = \frac{0.0109}{0.1478} \times 100 \\ = 7.37483085...[/tex]
We have the final answer as
7.375 %Hope this helps you
15)A photon has a frequency of 2.68 x 106 Hz. Calculate its energy.
Can you please show how you got it?
A photon has a frequency of 2.68 × [tex]10^6[/tex] Hz then the energy of a photon is [tex]1.78\times10^{-27}\text{J}[/tex].
What is meant by Planck's equation?
Planck's energy–frequency relation, or Planck's equation, gives the relationship between the energy of a photon and frequency. This equation is given by,
E = hv
Where, E be the energy of a photon
h be the Planck constant
v be the frequency
Given:
Frequency is 2.68 × [tex]10^6[/tex]
Planck's constant is 6.63 × [tex]10^{-34}[/tex] Js
The energy of a photon is given by,
E = hv
substitute the values in the above equation, we get
= 6.63 × [tex]10^{-34}[/tex] Js × 2.68 × [tex]10^6[/tex] Hz
simplifying the above equation, we get
= 1.78 × [tex]10^{-27}[/tex] J
The energy of the photon is 1.78 × [tex]10^{-27}[/tex] J.
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6. Mr. K is trsins so identify a white crystal he found this summer by determining the density of it. He
placed it on a scale and it massed out at 51.00 grams. When he placed it in 50.0 mL of water, the level
rose to 61.4 mi. Can you identify the mineral based on density.
Nlineral Barite Calcite Gypsum
Density (cm) 4.48
2.71
2.36
Answer:
Option A is correct (barite)
Explanation:
Given data:
Mass of mineral = 51.00g
Volume of water = 50.0 mL
Volume of water + mineral = 61.4 mL
Density of mineral = ?
Solution:
First of all we will calculate the volume of mineral.
Volume of mineral = (volume of water + mineral) - Volume of water
Volume of mineral = 61.4 mL - 50.0 mL
Volume of mineral = 11.4 mL
Density of mineral:
d = m/v
d = 51.00 g / 11.4 mL
d = 4.48 g/cm³ (1mL = 1 cm³ )
Thus the mineral is barite.
You are given given the density of an object to be 1.33 g/mL and the object's mass was measure to be 7.0 grams. Find the volume of the object.
Answer:
The answer is
5.26 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 7 g
density = 1.33 g/mL
The volume is
[tex]volume = \frac{7}{1.33} \\ = 5.26315789...[/tex]
We have the final answer as
5.26 mLHope this helps you
Rank cesium, chlorine, and chromium in order of increasing electron affinity
A) Cs < Cr < Cl
B) Cl < Cr < Ce
C) Ce < Cl < Co
D) Ca < Cu < Cl
Answer:
Cs, Cr, Cl
Explanation:
The Placement Of The Elements Increase In Electro Affinity.
I need help with that
Answer:
For (a) the independent variable is what stays constant throughout the whole experiment and the dependent variable is changes in the experiment.
Explanation:
I'm not sure about the other parts, but I hope my explanation for a can get you started :)
Which statement best describes an Equal Opportunity Employer? An Equal Opportunity Employer will always give anyone a job, regardless of race, color, religion, sex (including pregnancy), national origin, age, or disability. An Equal Opportunity Employer will make a hiring decision based on the traits they think are most important, including skill, race, education, or religion. An Equal Opportunity Employer will make a hiring decision without considering race, color, religion, sex (including pregnancy), national origin, age, disability, or genetic information.
Answer: The Answer is C
An Equal Opportunity Employer will make a hiring decision without considering race, color, religion, sex (including pregnancy), national origin, age, disability, or genetic information.
Explanation:
An Equal Opportunity Employer will make a hiring decision without considering race, color, religion, sex (including pregnancy), national origin, age, disability, or genetic information.
Who is an employer?
The employer is an individual or an organization in the government, private, nonprofit, or business sector that hires and pays people for their work. As the authority within an organization, the employer defines the terms of employment for employees and provides the agreed-upon terms which include the salary.
Another way to define an employer is a person who establishes the culture within an organization. Through their behavior, an employer can send a clear message about how employees should communicate with one each other and how the hierarchy within the organization should operate. For example, some employers encourage a more relaxed work environment, while others prefer a more formal and structured relationship with their employees. The way you interact with your employees should depend on the type of company culture you wish to create.
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The mass of an object is 1,000 g. It has a volume of 100 mL. What is the density of the object? D= mass/volume
Answer:
10 g/ml
Explanation:
divide mass by volume means divide 1000 by 100 and your answer will be 10
State some of the early beliefs about human
heredity.
Answer: During Gregory Mendel’s time, scientist believed:
A. The traits of a child’s parents were blended in the offspring, producing a child with intermediate
characteristics (hybrid)
a. Ex: Giraffe = a cross from a camel and a leopard.
B. Because the eggs are much larger than the sperm, some scientists believed that the female had a greater
influence on the characteristics of the offspring than the male.
Explanation:
what did we discover with this experiment
What is the scientific notation of 36000x10 ex.10?
Answer:
3.6 times 10^4
Explanation:
Scientific notation is between 1-9. So, we move 36000 to 4 decimal places. SO it would be 3.6 times 10^4. Scientific Notation always has the base of 10 . Enjoy :)
why are cell called the building blocks of organism
Answer:
A cell is the smallest unit of life, also called the 'building blocks of life' because cells multiply and differentiate to form a multicellular organism as well as give rise to new organism by forming gametes or reproductive spores.
Explanation:
Hope this helps
Answer:
I think it's A
Explanation:
If a +1 ion has 29 protons, what element is it?
Answer: Copper (I)
Explanation:
The number of protons in an atom directly correlates to the identity of the atom, so this ion is copper. The charge relates to the balance of protons and electrons, so this ion has one more proton than it does electrons, making our final answer Copper (I). (Make sure to state the charge of transition elements! In this case our charge is 1+, so we'll put a (I) after the name!)
Select all the correct answers.
Which two generalizations can be made based on what you know about cycles of matter in a closed system?
New matter is added, and old matter is destroyed.
Matter changes its physical form, allowing it to return to its original state.
The amount of matter within the system remains the same.
Matter and energy can cross the boundaries of the system.
The cycle has a well-defined starting and stopping point.
Answer:
It's The amount of matter within the system remains the same and The cycle has a well-defined starting and stopping point.
Explanation:
Answer: Plato users the correct answer is C but not E
Explanation: I just took the test. Hope you do better than I did in finding the correct second answer
how is iteration used in engineering design? why is this such an important aspect of the process?
Answer:
The cycle of prototyping, testing, and refining that's at the core of iterative design offers numerous benefits: Testing gives you a valuable collection of user feedback that you can use to improve your site and to understand what's working for you. It helps you catch problems before they spiral out of control.
Iteration assists you in detecting problems before they go out of control.
What is Iteration?Iteration is a design technique that revolves around a cyclical process of developing, testing, evaluating, and refining a product or process. Changes and adjustments are made based on the outcomes of testing the most current version of a concept.
Iteration, or the cycle of prototyping, testing, and refining that is at the heart of iterative design, has multiple advantages. Testing provides you with a valuable collection of user input that you can use to develop your site and understand what works for you.
Hence, Iteration assists you in detecting problems before they go out of control.
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The chemical properties of calcium and strontium are similar because both
Answer:
Number of valence electrons
Explanation:
349+1.10 + 100 =
and i have to put it in sig fig?
A student is working with four different solid substances: sodium (Na), calcium (Ca), copper (Cu), and iodine (I). Which substance is most likely to break easily into many smaller pieces?
sodium
calcium
copper
iodine
Answer:
Iodine
Explanation:
Answer:
D
Explanation:
how many atoms does C₆H₄Cl₂ have?
Answer:
There are 12 atoms in the compound
Why do clouds for when a warm air mass collieds with a cold air mass?
Answer:
The warming of the ground (or the oceans) is communicated to the air which, dilated and therefore lighter, begins to rise and cools. Convection clouds appear all the more easily when there is cold air at altitude (unstable air mass).
Explanation:
Hello please help me how
Answer:
its ph 8
Explanation:
(Brainliest) Please Help! Please do not give me a random, gibberish answer or I will report you and give you a low rating therefore dropping your popularity. Also, if you don't know the answer you can put your guess in the comments. I will give a Brainliest and 50 points!
What mass of KBr is present in 75.0 mL of 0.250 M KBr solution?
Answer:
Answer : The correct answer for mass of KBr = 2.53 g
Given :
Molarity of KBr solution = 0.85 M
Volume of KBr solution = 25 mL
Converting volume from mL to L ( 1 L = 1000 mL )
Volume of solution = 25 mL * \frac{1 L }{1000mL}Volumeofsolution=25mL∗
1000mL
1L
Volume of solution = 0.025 L
Mass of KBr = ?
Mass of KBr can be calculated using following steps :
1) To find mole of Kbr :
Mole of KBr can be calculated using molarity .
Molarity : It is defined as mole of solute present in volume of solution in Liter .
It uses unit as M or \frac{mol}{L}
L
mol
It can be expressed as :
Molarity = \frac{mol of solute (mol)}{volume of solution (L)}Molarity=
volumeofsolution(L)
molofsolute(mol)
Plugging value of molarity and volume
0.85 \frac{mol}{L} = \frac{mol of Kbr}{0.025 L}0.85
L
mol
=
0.025L
molofKbr
Multiplying both side by 0.025 L
0.85 \frac{mol}{L} * 0.025 L = \frac{mole of KBr}{0.025 L} * 0.025 L0.85
L
mol
∗0.025L=
0.025L
moleofKBr
∗0.025L
Mole of KBr = 0.02125
2) To find mass of Kbr :
Mass of Kbr can be calculated using mole . Mole can be expressed as :
Mole (mol) = \frac{mass (g) }{molar mass \frac{g}{mol} }Mole(mol)=
molarmass
mol
g
mass(g)
Mole of Kbr = 0.02125 mol
Molar mass of KBr = 119.00 \frac{g}{mol}
mol
g
Plugging values in mole formula
0.02125 mol = \frac{mass (g)}{119.00 \frac{g}{mol}}0.02125mol=
119.00
mol
g
mass(g)
Multiplying both side by 119.00 \frac{g}{mol}
mol
g
0.02125 mol * 119.00 \frac{g}{mol} = \frac{mass (g)}{119.00 \frac{g}{mol}} * 119.00\frac{g}{mol}0.02125mol∗119.00
mol
g
=
119.00
mol
g
mass(g)
∗119.00
mol
g
Mass of KBr = 2.53 g
A block with a mass of 10g is dropped into a graduated cylinder with 20 mL of water. The water rises to 25 mL. What is the density of the rock?
Answer:
The answer is
2.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of block = 10 g
volume = final volume of water - initial volume of water
volume = 25 - 20 = 5
volume = 5 mL
The density of the block is
[tex]density = \frac{10}{5} \\ [/tex]
We have the final answer as
2.0 g/mLHope this helps you
The number of particles in 3.5 moles of NaCl is
Answer:
Explanation:
remember all the time that there are a relation between numbers mole and the particles
1 mole -------------- 6.02x10 23 particles
3.5 mole ---------- X
X = 2.11 x 10 24 particles
