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Cerrena [4.2K]
4 years ago
13

A substance with a pH of 13.0 will

Physics
2 answers:
nata0808 [166]4 years ago
7 0
B......................
lubasha [3.4K]4 years ago
7 0
B. Litmus Papers turn blue in bases, and on the pH scale, a base must have a pH level over 7
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the atomic number of krypton (kr) is 36, and its mass number is 84. how many neutrons does it have? 18 36 48 72
tino4ka555 [31]

By definition, we have that the number of neutrons is given by:

# neutrons = atomic mass - # protons

We know that the atomic mass is equal to 84.

We know the atomic number of Krypton is equal to 36. This means that the Krypton has 36 protons and 36 electrons.

Therefore, substituting values we have:

  # neutrons = 84 - 36

  # neutrons = 48

Answer:

The Krypton has 48 neutrons

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3 years ago
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a girl on a backyard trampoline bounces straight upward with an initial velocity with 4.5 m/s what is the girls velocity when sh
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Which component of magma includes mobile ions of silicon?
Lemur [1.5K]

Answer:

Melt.

Explanation:

When rocks melt, they do so slowly and gradually because most rocks are made of several minerals, which all have different melting points; moreover, the physical and chemical relationships controlling the melting are complex. As a rock melts, for example, its volume changes. When enough rock is melted, the small globules of melt link up and soften the rock.

Under normal conditions, mantle rock like peridotite shouldn't melt in the Earth's upper mantle. However, by adding water you can lower the melting point of the rock. Alternatively, by decompressing the rock, you can bring it to a pressure where the melting point is lower. In both cases, basalt magma will form and considering it is hotter and less dense than the surrounding rock, it will percolate towards the surface and some of that erupts.

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Why does it seem that the Sun is rising and setting in the sky?
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