Someone please help me and explain this in detail!!!!!
Element X has three electrons in its outermost orbit.
Element Y has seven electrons in its outermost orbit.
What is the chemical formula of the ionic compound formed by these elements when they react together? (Use X and Y as the chemical symbols.)
Answer: The chemical formula of the ionic compound formed by these elements when they react together is [tex]XY_3[/tex].
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here element X is having an oxidation state of +3 as it can lose 3 electrons from its outermost orbit called as [tex]X^{3+}[/tex] cation and element Y is having an oxidation state of -1 as it can gain one electron in its outermost orbit called as [tex]Y^{-}[/tex] anion. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]XY_3[/tex].
Which of the following was one of the first uses of the electric light bulb?
as lights for Galloping Gertie
as searchlights at the New York World's Fair in 1893
as a searchlight at the Chicago World's Fair in 1893
as lights for the Tacoma Narrows bridge
Answer:
As lights for the Tacoma Narrows bridge
Explanation:
After Thomas Edison discovered electric appliances, light bulbs were produced for the streetlights as well. The first town in the United States to triumphantly display electric illumination was Cleveland, Ohio, with 12 electric lamps around the Public Square street system on April 1879. The light bulb served to stabilize social order after sundown.
Answer: As lights for the Tacoma Narrows bridge
Explanation: After Thomas Edison discovered electric appliances, light bulbs were produced for the streetlights as well. The first town in the United States to triumphantly display electric illumination was Cleveland, Ohio, with 12 electric lamps around the Public Square street system on April 1879. The light bulb served to stabilize social order after sundown.
The first inventors of the light bulb, Henry Woodward and Mathew Evans, faced which of the following problems?
The device was not very long lasting
The gas used in the light bulb was polsonous
The patent they tried to file for their invention was not accepted.
The nitrogen gas caused the light bulb to explode,
Answer:
The device was not very long lasting
Explanation:
Henry Woodward and Mathew Evans were two British scientist who invented first light bulb in 1860.
The challenge they faced while inventing light bulb was the log lasting light filament. Earlier filament was made up of carbonized paper which was not long lasting and has light for very less time period. Later they solve it by making carbon fiber filament derived from cotton and got patent for the same invention. But then because of financial issues they sold their patent to Edison.
Hence, the correct answer is "The device was not very long lasting".
Search for the Heart of the Sea ! Use the blue and red coral to reach the treasure chest. Only use 9 blocks, please help due in a hour.
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why it is important to clean all mixing equipment out after mixing paint?
Answer:
Explanation:
It is important to clean your equipment to
1. Make it look good (like who wants dirty equipment right?)
2. You are at risk of leaving paint, which can get mixed into future paints, causing an ugly color.
3. If there are any toxic chemicals in the paint, it is good to clean them out just to make sure.
Why might a hospital patient prefer to interact with a person instead of robot?
In the engineering design process, testing is the least important step.
True
False
Answer:
false
Explanation:
i think the answer is false
What is the structural stability formula?
Answer:
[tex]K=2J-R[/tex]
Explanation:
Let [tex]R[/tex] denotes the number of sides of a triangle.
Let [tex]J[/tex] denotes the number of joints.
Let [tex]M[/tex] denotes the number of members.
Let [tex]K[/tex] denotes the unknown to be solved.
Now write the structural stability formula:
[tex]K=2J-R[/tex]
Here, design is stable if [tex]M=K[/tex]
Design is unstable if [tex]M<K[/tex]
Design is indeterminate if [tex]M>K[/tex]
Describe carbonation as it applies to the four-stroke engine.
Which of the following sentences uses the word malleable correctly?
The gold wedding band was malleable, as it was shaped into a beautiful ring.
Functional designs are not malleable.
Plastic is a malleable substance that can conduct heat.
Ceramics are shaped by a malleable material.
Answer:
The sentence that uses the word malleable correctly is;
The gold wedding band was malleable as it was shaped into a beautiful ring
Explanation:
Malleability is the property of metal to have their shape changed by means of hammering, pressing or rolling so as to form sheets without them breaking such that the metals assume a new shape by compression
An example of a malleable metal is gold, which can be hammered into a gold leaf
Malleability in metals is due to their ability to have their nuclear shifted while maintaining their bonds due to the ability for electrons to move freely such that they are replaced with ease
Therefore, the sentence that uses the word malleable correctly is the gold wedding band was malleable such that it was able to be shaped into a beautiful ring.
A tee requires three studs and three cripples.
O TRUE
O FALSE
Answer:
will you please explain more?
Automobiles have been in use for:
A) Approximately 50 years.
B) Since the 1950's.
C) Over 100 years.
D) Approximately 75 years.
2.
_________ Is NOT a common Injury that an automotive tech may experlence at work.
A) Jaw pain
B) Back pain
c) Leg pain
D) Carpal tunnel syndrome
An engineer sketches detailed drawings of the keypad of a new cell phone. What stage in the product development life cycle is this?
O concept development
O product testing
detailed product design
O product systems design
Which of the following describes the powertrain?
A) The components that generate power.
B) The structural framework of the vehicle.
C) The components of the vehicle that transfer power.
D) The components that power the electrical systems.
What is 84 inches and 1/2 plus 348 inches
Answer:
432 1/2 inches
Explanation:
Fill in the blank to correctly complete the statement below.
The problem faced by Galloping Gertie, the failed bridge across the Tacoma Narrows, was caused because the
engineers did not follow the perform tests on the prototype/testing/ step in the engineering design process.
Pretend 1% of the population has a disease. You have a test that determines if you have that disease, but it’s only 80% accurate and 20% of the time you get a false positive. Your test comes back positive. How likely is it you have the disease?
Answer:
3.88% of the time
Explanation:
What system transfers the power created by the engine to the
wheels?
A) Powertrain
B) Chassis
C) Electrical/Electronic
D) Driveline
