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3 years ago

9

The stage of engine operation when both the intake and exhaust valves are closed is the _______ stage. A. compression B

. power C. intake D. exhaust

1 answer:

Varvara68 [4.7K]3 years ago

3 0

D. the exhaust valve

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Help! I need to finish work. Brainlist will be given to the most helpful!

Soloha48 [4]

Answer:

1. matches with elements.

2. matches with compounds.

3. matches with atoms

4. matches with weight

5. matches with gas

6. matches with carbon dioxide

7. matches with Mendeleev (there's an element named after him)

8. matches with IUPAC

Hope that helped :)

7 0

2 years ago

8. What is the name of this compound?

olga2289 [7]

Answer:

tert-butyl bromide

Explanation:

sec-butyl bromide

CH3 -CH-CH2-CH3

Br

tert-butyl bromide

CH3

CH3-C- Br

CH3

isopropyl bromide

CH3

CH3-CH-Br

isobutyl bromide

CH3

CH3-CH-CH2-Br

6 0

3 years ago

Which process is a chemical change? breaking of glass formation of frost magnetization of an iron nail loss of atmospheric ozone

Elenna [48]

The answer is "D" loss of atmospheric ozone

3 0

3 years ago

Read 2 more answers

Th muscular system and the skeletal system of work together so the body can______.

MA_775_DIABLO [31]

The answer is D because moving all of the body parts would get the heart racing and the blood pumping!

7 0

3 years ago

Read 2 more answers

A glass cylinder contains 2 gases at a pressure of 106 kPa. If one gas is at 7 kPa, what is the pressure of attributed to the ot

Ivan

Answer:

b) 99 kPa

Explanation:

According to Daltons law of partial pressure, the total pressure of a mixture of two or more non reactive gases is the sum of their individual pressures. Let the total pressure of a mixture of n number of gases be $P_{total}$ and their individual pressure be $P_1,P_2,P_3,\ .\ .\ .\ ,\ P_n$ , According to Daltons partial pressure law:

$P_{total}=P_1+P_2+P_3+.\ .\ .+P_n$

Since A glass cylinder contains 2 gases at a pressure of 106 kPa, therefore n = 2. Also one gas ( $P_1$ ) is at 7 kPa. Using Daltons partial pressure law:

$P_{total}=P_1+P_2+P_3+.\ .\ .+P_n\\P_{total}=P_1+P_2\\106\ kPa=7\ kPa+P_2\\P_2=106\ kPa-7\ kPa\\P_2=99\ kPa$

7 0

3 years ago