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serious [3.7K]
3 years ago
9

Which statement is true about the SI System?

Chemistry
1 answer:
Ludmilka [50]3 years ago
8 0

Answer:

is used in scientific measurements.

Explanation:

A complete metric system of units of measurements for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric....

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Classify the ff in to oxide,salt,base,acid.1,sodium sulphate2,hydrogen catbonate​
kupik [55]

Answer:

Hydrogen carbonate is an acid, sodium Sulfate is a salt.

Explanation:

Hydrogen carbonate is a weak acid because it will partially ionize in water while sodium sulfate is a neutral salt which is formed when neutralization of acid and base takes place

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A student uses a lever and fulcrum to lift a rock off the ground.
Sedaia [141]
it has to me b because it shows what they did in this part
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What are the three hypotheses that were proposed to explain the seismic activity of Pinatubo? What process generates sulfur diox
ASHA 777 [7]

Answer:

Mt. Pinatubo is one of the contrasting volcanoes that erupted violently in the year 1991, being the second strongest volcanic eruption that took place on earth in this entire century.

The 3 hypothesis that was proposed in order to describe the seismic activity of Pinatubo includes-

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  • The eruption led to the releasing of a large number of volcanic gases into the atmosphere.
  • The earthquakes are produced due to the continuous tectonic activities that are primarily caused when the earth's crust moves over the layer of viscous asthenosphere.

A large number of volcanic gases are released such as sulfur dioxide (SO₂), methane (CH₄), Hydrogen sulfide (H₂O), Carbon monoxide (CO), and other gases, due to the formation of convection currents and rising up of magma from the mantle, creating volcanic eruptions at the surface

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How do you balance the following solution Zn(s)+HCI(aq)—>ZnCI2 (aq) + H2(g)
Ierofanga [76]

<u>Answer:</u> The atoms of every element on both the sides of the reaction must be same.

<u>Explanation:</u>

We are given a chemical equation and we need to balance it. Every equation follows Law of Conservation of mass.

This law states that in a chemical reaction, the number of atoms of each element must be same on both the sides of the equation.

For the given chemical equation:

Zn(s)+HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)

On reactant side:

Number of zinc atoms = 1

Number of hydrogen atoms = 1

Number of chlorine atoms = 1

On product side:

Number of zinc atoms = 1

Number of hydrogen atoms = 2

Number of chlorine atoms = 2

As, the number of hydrogen and chlorine atoms on reactant and product side is not same, so we need to add a stoichiometric coefficient in-front of HCl on the reactant side. The balanced chemical equation becomes:

Zn(s)+2HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)

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4 years ago
!!PLS HELP!! How many molecules are in 25.4g Tricarbon tetrahydride?
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