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ahrayia [7]
2 years ago
15

What number should be placed

Chemistry
1 answer:
vfiekz [6]2 years ago
7 0

Answer:

13g

Explanation:

34+10+26=70

70-57=13

13g would complete the equation

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The mass of an electron is about 9.11 × 10 -9 kg., write this whole number​
Pepsi [2]

Answer:0.00000009

Explanation:

9.11 × (1/1000000000)=0.00000009

8 0
2 years ago
Calculate the density of helium if a balloon with a capacity of 5.00 L holds 0.890 g.
liubo4ka [24]

Answer:

Explanation:

Density is m/V. Also, 1 liter = 1000 cm^3. So, we get 0.890/(5*1000) = 1.78*10^{-4} g/cm^3. You can convert this to kg/m^3 as well by multiplying it by 10. Depends which one you want.

5 0
3 years ago
Which statement best describes what makes a base weak?
dimulka [17.4K]

A base is weak when only a little of it dissolved in Water.

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6 0
3 years ago
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What does h20 mean on the periodic elements chart
Paladinen [302]

Answer:

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Hydrogen is the first element listed on the periodic table and can be found in the top leftmost position. Oxygen is the eighth element on the periodic able and is located in the second row at the top right.

3 0
1 year ago
Your amplifier is playing a 200 Hz tone. When you double the amplitude(loudness), what happens to the speed of the sound (v) and
kherson [118]
Its d. Speed (v) and frequency(f) both stay the same.

<span>Because Amplitude does not affect wave frequency. When you put more energy into the wave (larger amplitude) it does not affect how often you repeat a cycle. 
</span>Also speed can be altered when the medium changes through which it travels.
8 0
3 years ago
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