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Degger [83]
4 years ago
6

What is an astronomical unit? the average distance between planets in the solar system the average distance between the Earth an

d the moon the approximate diameter of the Sun including its atmosphere the average distance between the Earth and the Sun
Chemistry
2 answers:
Serhud [2]4 years ago
4 0
An astronomical unit (AU) is the average distance between the Earth and the Sun
Aleks [24]4 years ago
4 0

Answer: The average distance between the Earth and the Sun

Explanation: Distance in the solar system (stellar system) is measured in terms of astronomical units due to large distances involved. 1 astronomical unit is equal to nearly 150 million kilometers.

Distances beyond our solar system are usually measured in light years.  For example, The distance of stars from the earth are measured in light years.

1 light year is nearly equal to 6 million million miles.



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Where would you expect to find the smallest atoms?​
abruzzese [7]

Answer:

Because of these two trends, the largest atoms are found in the lower left corner of the periodic table, and the smallest are found in the upper right corner (Figure 2.8.

Explanation:

comment how it helps

6 0
3 years ago
A bike tire at a pressure of 740 mmHg and a
lbvjy [14]

Answer: The new pressure is 831 mm Hg

Explanation:

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 740 mm Hg

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 2.2 L

V_2 = final volume of gas = 2.0 L

T_1 = initial temperature of gas = 290 K

T_2 = final temperature of gas = 296 K

Now put all the given values in the above equation, we get:

\frac{740\times 2.2}{290}=\frac{P_2\times 2.0}{296}

P_2=831mmHg

The new pressure is 831 mm Hg

8 0
3 years ago
Which element is in Group 2 and Period 7 of the Periodic Table?
miss Akunina [59]

Answer:

A) Radium

i don't think that group 2 has period 7, it has only up to period 6 so it's probably Radium :))

3 0
3 years ago
D Which compound is insoluble in water?
densk [106]

Answer:

Examples of substances insoluble in water: oil, acetone, ether

Explanation:

Such examples of substances are non-polar and do not dissolve in water (polar compound). The classic example is oil floating in water (this happens because oil has a lower density than water).

3 0
4 years ago
What is an isotope?
gizmo_the_mogwai [7]
An isotope of an element is another element that has the same number of protons but a different number of neutrons (for instance ^4_2He and ^3_2He)
6 0
3 years ago
Read 2 more answers
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