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attashe74 [19]
4 years ago
14

Explain how a water strider can float on the surface of water without sinking.

Chemistry
1 answer:
Rainbow [258]4 years ago
8 0

Answer:

low weight and great area

Explanation:

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Natasha and Reanna observe a large airplane in the troposphere. Which experimental setup below would best determine how changing
snow_lady [41]

Answer:

i am pretty sure the answer is a

Explanation: because the airplane's flight time has to be the independent variable for it to affect the dependent variable that is the speed of how fast the airplane is going.

8 0
3 years ago
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At 189k a sample of gas has a volume of 32.0cm. what does the gas occupy at 242k
sattari [20]
<h2>Answer:</h2>

At 189 K volume = 32.0 cm

As volume of gas is directly proportional to temperature.

As the temperature increase the volume of gas will also increase.

so

Volume at 1 K =  32/189

Volume at 242 K = 32/189 * 242 = 40.97 cm.

Gas occupy 40.97 cm volume at 242 K.



5 0
4 years ago
10g of sugar is dissolved by water to make 200g of solution of sugar. What is the percent by mass of the solution?​
Scorpion4ik [409]

Explanation:

In sugar solution 200 g has sugar 10 g

In sugar solution 100 g has sugar 10/200 × 100

= 5 %w/w

7 0
4 years ago
You may recall that the products of the complete combustion of a
Vesna [10]

Answer: CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

Explanation: According to law of conservation of mass, mass can neither be created nor be destroyed.

Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

This is an example of combustion reaction in which hydrocarbon reacts with oxygen to form carbon dioxide and water. This is an exothermic reaction in which a large amount of heat is liberated, thus water also exists as vapors.

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

3 0
3 years ago
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In which block of the periodic table should iron be placed
Dmitry_Shevchenko [17]
Iron should be in the 3d block

8 0
3 years ago
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