What is the speed of a jet plane that flies 78500 km in 10.5 hours (in km/hr)?
Do not use decimal
hi I'm new here and here to help
Answer: Welcome to Brainly!
We are happy to have you! :)
why do atoms combine
Explanation:
Atoms form chemical bonds with other atoms when there's an electrostatic attraction between them. This attraction results from the properties and characteristics of the atoms' outermost electrons, which are known as valence electrons.
What role does science play in changes?
Answer:
Science, as well as technological and metaphysical questions, should offer solutions to our everyday problems. The consistency of responses offered to society should be increased by research. Science, however, still needs to interact with society in conversation.
Explanation:
Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write
out?
a set of quantum numbers for the last electron in the atom
a configuration with numbers letters and subscripts
a dot structure of the atom
an orbital notation of the atom
Answer:
D. an orbital notation of the atom
Explanation:
i took the test
How do you know if a energy level is full
Answer:
By checking Level.ok!!
How does the interior of the earth affect the exterior of a volcano? Explain.
Answer:
it erupts
Explanation:
Some chemical reactants are listed in the table below. Complete the table by filling in the oxidation state of the highlighted atom.
Answer:
1. Cu = +2
2. O = – 2
3. C = +2
4. N = 0
Explanation:
Note:
A. The oxidation state of oxygen is always – 2 except in peroxides where it is – 1.
B. The oxidation state of Hydrogen is always +1 except in metallic hydrides where it is – 1.
Now let us solve the question given above.
1. CuO = 0 (ground state)
Cu + O = 0
O = – 2
Cu + (– 2) = 0
Cu – 2 = 0
Collect like terms
Cu = 0 + 2
Cu = +2
2. H2O = 0 (ground state)
2H + O = 0
H = +1
2(1) + O = 0
2 + O = 0
Collect like terms
O = 0 – 2
O = – 2
3. CO = 0 (ground state)
C + O = 0
O = – 2
C + (– 2) = 0
C – 2 = 0
Collect like terms
C = 0 + 2
C = +2
4. N2 = 0 (ground state)
2N = 0
Divide both side by 2
N = 0/2
N = 0
The head of a pin is 1.5 × 10-3 m in diameter. If 1.136 × 107 atoms of oxygen can fit across the head of a pin, what is the atomic radius of oxygen?
About five million million hydrogen atoms could fit. Some factors would affect that number like the area of the head and the size of atoms (as well as attractions between atoms). Some atoms are larger than others.
If 1.136 × 10⁷ atoms of oxygen can fit across the head of a pin whose diameter is 1.5 × 10⁻³ m, the atomic radius of oxygen would be 6.60 × 10⁻¹¹ m.
The head of a pin is 1.5 × 10⁻³ m in diameter. If 1.136 × 10⁷ atoms of oxygen can fit across the head of a pin, the diameter of each oxygen atom would be:
[tex]\frac{1.5 \times 10^{-3}m }{1.136 \times 10^{7}atom} = 1.32 \times 10^{-10}m/atom[/tex]
The atomic radius of oxygen would be half of its diameter.
[tex]\frac{1.32 \times 10^{-10} m}{2} = 6.60 \times 10^{-11} m[/tex]
If 1.136 × 10⁷ atoms of oxygen can fit across the head of a pin whose diameter is 1.5 × 10⁻³ m, the atomic radius of oxygen would be 6.60 × 10⁻¹¹ m.
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Does Kumiho the legendary exist??
Answer: Deriving from ancient Chinese myths and folklores, a fox that lives a thousand years turns into a kumiho, like its Japanese and Chinese counterparts. It can freely transform, among other things, into a beautiful woman often set out to seduce boys, and eat their liver or heart (depending on the legend).
Hoped that helped!
Answer:
No
Explanation:
The Kumiho is similar to other fox creatures, such as the Japanese kitsune and Chinese Huli jing. Even though they have similar magical abilities and longevity, Kumiho is more malevolent than other fox spirits. Of these long-lived legendary creatures, the Kumiho is the only fox that kills and eats humans. Kumiho is just a myth itś not real and no one has seen this fox so "it" does not exist.
Which sentence correctly uses parallel structure? The boss wants to know who can take the late shift tonight, open tomorrow morning, and who can work on the holiday. The boss wants to know who wants the late shift tonight, who can open tomorrow morning, and if you will work on the holiday. The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday. The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and which of us wants to work on the holiday.
Answer:
C) The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday.
Explanation:
The sentence that has been in the parallel structure has been the boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday has been in parallel structure. Thus, option C is correct.
The parallel structure can be defined as the continuous repetition of the grammatical form in the sentence. The parallel structure has been able to provide equal importance to the tasks in the sentence.
In the given sentence, the varying task has been late shifts, open tomorrow, and work on holidays. The grammatical form of who can has been able to give equal importance to every task with the repetition.
Thus, boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday has been in parallel structure. Thus, option C is correct.
For more information about the parallel structure, refer to the link:
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Convert the following masses into kilograms:
(a) 2,300,000 grams
(b) 5,000 milligrams
(c) 23,000 micrograms
(d) 0.155 megagrams
Answer:
(a): 2,300 kilograms
(b): 0.005 kilograms
(c): 2.3 × 10^-5 kilograms
(d): 155 kilograms
Explanation:
Formulas:
(a); divide the mass value by 1000
(b); divide the mass value by 1e+6
(c); divide the mass value by 1e+9
(d); multiply the mass value by 1000
A sample of seawater weighs 250 g and has a volume of 173 ml. What is the density of seawater?
Answer:
The answer is 1.45 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 seawater = 250 g
volume = 173 mL
It's density is
[tex]density = \frac{250}{173} \\ = 1.4450867052...[/tex]
We have the final answer as
1.45 g/mLHope this helps you
A hydrogen electron is elevated from level 1 to level 2. Another electron is elevated from level 2 to level 4. The transition requiring the greatest energy change is
Answer:
the answer is level 2 to level 4
Explanation:
Read the claim.
Breakfast is an important meal. It jump starts the body’s process of using calories to break down food. Appetite can decrease with age, but going too long without eating causes metabolism to slow down. Current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. Who might benefit from this claim?
A.people who have a fast metabolism
B.stores that sell exercise equipment
C.people who take vitamin supplements
D.grocery stores that sell legumes
What is the most abundant greenhouse gas released through human activities? a. methane b. nitrous oxide c. carbon dioxide d. sulfur dioxide
Answer:
C. Carbon dioxide. (C02.)
Explanation:
Hope this helps. :)
Answer:
Carbon dioxide
Explanation:
Draw the Lewis dot diagram for a Mg- anion.
Answer:
..
Explanation:
What is the Thermal Energy?
Answer:
Thermal Energy is a certain type of energy that Heats.
Explanation:
"Thermal" is derived from "Thermo" which means heat.
Which of the following best specifies the purpose of error bars on a graph? To show the mean of a data set. To identify the independent variable. To give a visual display of measurement precision. To indicate the total number of measurements that are made.
Answer:
c
Explanation:
To give a visual display of measurement precision best specifies the purpose of error bars on a graph.
What are errors?Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.
There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.
Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental or systematic error if there is a fault in the thermometer.The experiments must be done with utmost care to minimize the range of errors.
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HELP PLEASE!!
Calculate the mass in grams of an object whose volume is 67.8 mL and whose density is 7.25 g/mL
Answer:
The mass of the object would be 491.55g/mL. Hope this helped! :)
Explanation:
D= 7.25g/mL M=D•V
V= 67.8mL
M=7.25g/mL•67.8mL
M= 491.55g
How many electrons does maganese 55 have?
Answer:
Maganese 55 has 25 electrons.
Hope this helps you!
Explanation:
What is the percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution?
Please help
Answer:
The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %
Explanation:
The mass percentage of a solution is a measure of concentration that indicates the number of grams of solute that there are per 100 grams of solution.
The percent by mass is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100 to give a percentage.
[tex]percentage by mass=\frac{solute mass}{solution mass} *100[/tex]
In this case:
solute mass: 30 gsolution mass: 650 gReplacing in the definition of percent by mass:
[tex]percentage by mass=\frac{30 g}{650 g} *100[/tex]
Solving:
percent by mass= 4.61 %
The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %
The sum of two integers is -4. Can the two integers both be positive?
Answer: No.
Explanation: A negative integer can only be made with 2 negative integers or 1 positive and 1 negative integer.
does anyone know the answeres
Which form of heat transfer is the sun heating Earth's atmosphere? *
Answer:
Radiation
Explanation:
Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible.
What’s is the specific gravity of turpentine
HELP 100 POINTS explain how you would separate the components of a dirty water mixture that consists of: • coffee grounds • garlic powder • vegetable oil • sodium chloride (table salt) • gravel and sand • water. For each step discuss what separation method you are using and why you chose that method
Note that all detail explanation on why or how will be attached at the end
Step 1: Removing the Oil
Theoretically, step 1 and 2 can be alternated and preferably I would start with step 2, but I thought of one first. I would begin by setting up the liquid mixture in a funnel with a closed twist valve. Once the water mixture and oil has separated, I would slowly remove all the water, leaving the oil.
Step 2: Removing the Gravel and Sand
The second step is to filter out solids by using a sand filter. This filter is made by using a Styrofoam cup that has had small holes punched into the bottom with an open paperclip. The cup is filled with layers of clean washed gravel. The gravel will be layered by putting course gravel in the bottom and fine sand in the middle followed by course sand on the top. The gravel on the bottom stops the loss of sand out of the holes and the gravel on top stops the sand from washing out as a sample is poured.
Step 3: Removing the Coffee Grounds and Garlic Powder
You would start by lining a clean funnel with a coffee filter or something comparable. Then, you would add a spoonful or so of Charcoal to the funnel. Then you would pour the mixture of water, garlic powder, salt and coffee grounds into it.
Step 4: Removing Salt
You would preform a simple evaporation to remove the salt from the water. If the water is still needed, then you can preform a sealed distillation which has the same effect, but just keeps the water.
Step 5: Celebrate!
If you are doing this is a school, congratulations! you just finished your assignment/lab! If you are doing this in the wilderness for survival, congratulations! you won't die so soon!*
*The purification of water will not guarantee your extended survival in the wilderness, just extend the time in which you will not die of dehydration.™
Explanation:
Step 1 works because the density of oil and water are different, so as you let the liquid settle, the two liquids will separate into two sections. This allows you to funnel the water out. Step 2 work because the gravel and sand you want out cannot pass the sand-gravel filter you made (as long as it was made correctly) Step 3 works because the garlic powder and coffee grounds cannot pass the filter and the smell and colour that leaked into the water would be removed by the charcoal. Step 4 works because as water evaporates or is boiled off, the salt cannot evaporate with it, so it is left behind. Like how I was in the mall. Step 5 works because this was a long explanation and now you can go look at memes.
The first record of the scientific method being used was approximately
O A) 600 years ago.
O B) 3,000 years ago.
O C) 50 years ago.
O D) 1.200 years ago.
Answer:
600 years ago
Explanation:
it was first recorded by England's Sir Francis Bacon (1561-1626)
An atom with 17 protons, 18 neutrons, and 18 electrons will have a charge of
Answer:
It's atomic mass is 35
Explanation:
How much copper is in 3.79 g of copper
Answer:
3.79 g
Explanation: