All categories

3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME ASAP!

Chemistry

1 answer:

Alexandra [31]3 years ago

4 0

Answer:

Single displacement and reduction

Explanation:

In a single-displacement reaction, one element exchanges partners with another.

$\rm Ca + 2H$_2$O $\longrightarrow$ Ca(OH)$_2$ + H$_2$$

This is a single-displacement reaction, because the element Ca exchanges partners with H.

This is also a reduction/oxidation (redox) reaction, because the optically active of Ca increases from 0 to +2 (oxidation), while the oxidation number of H decreases from +1 to 0 (reduction),

The most common types of reactions are:

Combination
Decomposition
Single displacement
Double displacement
Reduction/oxidation

You might be interested in

2. An element is all the way through,

elena55 [62]

?? Is that the whole question?

6 0

3 years ago

Law of Conservation of Mass in terms of atoms

VARVARA [1.3K]

No atoms are lost or made during the chemical reaction so the total mass of the products is equal to the total mass of the reactants. In an atom, protons and neutrons contribute to the mass and since the number of them doesn’t change, the mass doesn’t either.

4 0

3 years ago

How many atoms of mercury are present in 3.4 cubic centimeters of liquid mercury? the density of mercury is 13.55 g/cc?

maks197457 [2]

Answer:

1.37 × 10²³ Atoms of Mercury

Solution:

Step 1: Calculate Mass of Mercury using following formula,

Density = Mass ÷ Volume

Solving for Mass,

Mass = Density × Volume

Putting values,

Mass = 13.55 g.cm⁻³ × 3.4 cm³ ∴ 1 cm³ = 1 cc

Mass = 46.07 g

Step 2: Calculating number of Moles using following formula;

Moles = Mass ÷ M.mass

Putting values,

Moles = 46.07 g ÷ 200.59 g.mol⁻¹

Moles = 0.229 mol

Step 3: Calculating Number of Atoms using following formula;

Number of atoms = Moles × 6.022 ×10²³

Putting value of moles,

Number of Atoms = 0.229 mol × 6.022 × 10²³

Number of Atoms = 1.37 × 10²³ Atoms of Hg

8 0

3 years ago

What are some things that could happen to you if you have an electrolyte imbalance?

Anestetic [448]

Answer:

fast heart rate, lethargy, fatigue

4 0

3 years ago

Read 2 more answers

Chemical reactions occur when chemical bonds between atoms are formed or broken. reactants come together and produce a reaction

Sveta_85 [38]

What's the question? I don't understand where the problem is.

4 0

3 years ago