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3 years ago

What do you think caused the balloon to expand

2 answers:

5 0

Pressure on the inside of the balloon was greater than the pressure on the outside of the balloon so it pushed out until the pressures equalized.

IgorLugansk [536]3 years ago

3 0

Balloons expand because of the pressure of the air being blown in to it is pushing against the side which causes the elastic in the balloon to expand.

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Which statement is correct about the reaction that occurs between copper and aqueous silver nitrate?

svetlana [45]

Answer:

It is a single replacement reaction because copper replaces silver within a compound as copper is higher than silver in the activity series.

Explanation:

A single replacement reaction occurs between an element and a compound, therefore since copper is an element and sliver nitrate is compound, it is single replacement. This reaction occurs because copper is higher in the activity series then silver.

5 0

3 years ago

Read 2 more answers

In a lab in New York, Thomas and Nikola collected data over several trials. Thomas recorded his measurements as 10.0 A, 11 A, an

Anna11 [10]

Nikola's reading has a lower range and it is logical to conclude that his reading is more precise.

Explanation:

Precision is the ability to reproduce the same set of result from a measurement. The more repeatability a measurement is, the more precise it is.

From the given pool of data, it is easy to determine which set of data is more precise over the other.

Thomas measurements: 10.0 A, 11 A, and 8 A

Nikola measurements: 9.0 A, 9.2 A, 8.8 A

Using the range method, it is possible to find the precision in this pool of data.

Method and Solution:

Find the range of the sample:

Range = highest value - lowest value

Thomas measurement; Range = (11-8)A = 3.0A

Nikola measurement; Range = (9.2-8.8)A = 0.4A

Find the mean of the samples:

Mean of Thomas measurement = $\frac{10 + 11+ 8}{3}$ = $\frac{29}{3}$ = 9.7A

Mean of Nikola measurement = $\frac{9+ 9.2+ 8.8}{3}$ = $\frac{27}{3}$ = 9A

Now let us quote the range of value of the mean of each measurement:

Thomas 9.7±3.0A

Nikola 9.0± 0.4A

Nikola's reading has a lower range and it is logical to conclude that his reading is more precise.

Learn more:

mean calculation brainly.com/question/12068498

#learnwithBrainly

5 0

3 years ago

Describe how molecular motion and distance between molecules change as ice is heated to become a liquid and then a gas

MAXImum [283]

Answer:

Described in the explanation section

Explanation:

Ice is the solid phase of water and this phase, the water molecules usually have very little energy and therefore can't detach from each other. This is because the water molecules are closely packed together in a regular arrangement normally called lattice.

Now, when the ice is heated to become a liquid, the energy of the water molecules increases and thus some of them will have enough energy to overcome the intermolecular forces that had been keeping them closely packed in the ice phase. This will then make the water molecules to move further apart thereby forming liquid water.

Now, when the molecules are heated further, the liquid water will now turn into water vapor, which is the gas phase of water. The molecules in this gas phase will have more energy than in the liquid phase because the average distances between each of them will be much larger than the size of the molecules themselves.

8 0

3 years ago

PLZZ HELP ITS TIMED

BartSMP [9]

Answer:Carbon dioxide

Explanation:Carbon dioxide molecules are heavier than air. Because of this, they push the oxygen and other molecules in the air out of the way as they sink down over the flame and candle. When oxygen is pushed away from the wick, it can’t react with the wax anymore. This makes the flame go out.

Next time you blow out a candle, think about what your breath is doing. Why do you think blowing on a candle flame makes it go out?

3 0

2 years ago

DiKsa [7]

Answer:

It has a negative charge and is located in orbitals around the nucleus

Explanation:

5 0

3 years ago

Read 2 more answers