CHEMISTRY HIGH SCHOOL

What are the products of the complete combustion of a hydrocarbon in excess oxygen

Answers

Answer 1
Answer: The products for the complete combustion of a hydrocarbon in excess air is carbon dioxide and water. Any hydrocarbon when reacted with oxygen will always yield the said products. Incomplete combustion, on the other hand, yields carbon monoxide and water.

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________ is a strong, parallel alignment of coarse mica flakes and/or of different mineral bands in a metamorphic rock.
What are some basic ideas of the cell theory?
Given the balanced equation:2KI F2 → 2KF I2 Which type of chemical reaction does this equation represent? (1) synthesis (2) decomposition (3) single replacement (4) double replacement
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What is a better conductor of electricity? Copper Iron Nickel Aluminum

Answers

The answer is copper

What is the charge on a chloride ion? What does chlorine have to do to form such an ion, and whydoes it tend to do so?

Answers

Answer:

The chloride ion has a -1 charge and it tends to form such an ion because it wants the octet rule to be complete, and since it has 7 it needs one more for 8 electrons.

Hope this helps!

Explanation:

Consider the following equation: 0.0136 g + 2.70 × 10-4 g - 4.21 × 10-3 g = ? How many digits to the right of the decimal point should be used to report the result?

Answers

Answer:

It should be used 2 digits to the right of the decimal point to report the result

Explanation:

When adding or subtracting two decimal numbers, the number of digits to the right of the decimal point in the result is equal to the amount with the least number of decimal places.

In this case we have 4 decimal places in 0.0136 g, 2 decimal places in 2.70 × 10-4 g and 2 decimal places in 4.21 × 10-3 g, so, the least number of decimal places is 2 and that should be the number of digits to the right of the decimal point in the result.

Then the result of the sum should be 9.66 × 10-3 g

I got 2.......................

Which of the following elements have the same number of valence electrons?l. nitrogen (N)
ll. oxygen (O)
lll. fluorine (F)
lv. sulfur (S)
v. selenium (Se)





A. IV, and V
B. I, II, and III
C. I, II, and IV
D. II, IV, and V​

Answers

The answer is II. Oxygen, IV. Sulfur, and V. Selenium.

Explanation:

Going down the list that was provided, we can use the periodic table of elements to determine the valence electrons.

- Nitrogen has 5 valence electrons

- Oxygen has 6 valence electrons

- Fluorine has 7 valence electrons

- Sulfur has 6 valence electrons

- Selenium has 6 valence electrons

Since oxygen, sulfur, and selenium all have 6 valence electrons, then that is the correct answer.

I hope this helps you!

Imagine that you have a metal bar sitting half in the sun and half in the dark. On a sunny day, the part of the metal that has been sitting in the sun feels hot. If you touch the part of the metal bar that has been sitting in the dark, will it feel hot or cold? Justify your answer in terms of thermal conductivity.

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Answer:

It will feel hot.

Explanation:

The part of the metal that has been sitting in the sun will heat up, and because metal is a good conductor, the part sitting in the sun will heat up the part sitting in the dark.

We say metal is a good conductor because it has high thermal conductivity, which mean heat will flow from the hot section of the bar to the cold section of the bat.

After the food has been chewed and lubricated, it is pushed by the tongue into the___________.larynx
pharynx
stomach

Answers

The answer is pharynx

Pharynx is cone-shaped passageway leading from the oral and nasal cavities in the head to the esophagus and larynx. The pharynx chamber serves both respiratory and digestive functions

After the food has been chewed and lubricated, it is pushed by the tongue into the Pharynx
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Doing science, and having a bit of trouble.please helpthank you so much!