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DaniilM [7]
4 years ago
7

The toy car in the picture is propelled forward by A) The weight of the car. B) The force of the car on the air. C) The friction

of the wheels on the car. D) The reaction force of the air on the car.
Chemistry
1 answer:
katovenus [111]4 years ago
7 0

Answer:

the answer is d :)

Explanation:

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How was this purple loosestrife transported to its new ecosystem?
Troyanec [42]
The natural seed spread for purple loosestrife is through water or animals. 

I hope this will help.
3 0
4 years ago
Calculate the percentage by mass of the indicated element in the following compounds. Hydrogen in ascorbic acid, HC6H7O6, also k
Scorpion4ik [409]

Answer: The mass percent of hydrogen in ascorbic acid is 4.5 %

Explanation:

In C_6H_8O_6, there are 6 carbon atoms, 8 hydrogen atoms and 6 oxygen atoms.

To calculate the mass percent of element in a given compound, we use the formula:

\text{Mass percent of hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Molar mass of ascorbic acid}}\times 100

Mass of hydrogen = 8\times 1g/mol=8g

Molar Mass of ascorbic acid =6\times 12g/mol+8\times 1g/mol+6\times 16g/mol=176g

Putting values in above equation, we get:

\text{Mass percent of hydrogen}=\frac{8g}{176}\times 100=4.5\%

Hence, the mass percent of of hydrogen in ascorbic acid is 4.5 %.

8 0
3 years ago
The temperature of a sample of water increases from 20°C to 46.6°C as it absorbs 23,639.6 J of heat. What is the mass of the sam
oksano4ka [1.4K]

Answer: 213 g

Explanation:

5 0
3 years ago
Three Balanced equations for Ammonium salt+Alkali=Salt+water+carbon dioxide
arlik [135]

Answer:

NH₄Cl (aq) + NaOH (aq) -> NaCl (aq) + H₂O (l) + NH₃ (g)

(NH₄)₂CO₃ (aq) + 2KOH (aq) -> K₂CO₃ (aq) + 2H₂O (l) + 2NH₃(g)

NH₄NO₃ (aq) + LiOH (aq) -> LiNO₃ (aq) + H₂O (l) + NH₃ (g)

Explanation:

The gas liberated when an alkali reacts with an ammonium salt is NH₃ (ammonia), not CO₂.

4 0
3 years ago
Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume) mixture of gas that had a total volume of 22.4 liter
lisabon 2012 [21]

Answer:

6

Explanation:

6 0
4 years ago
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