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3 years ago

Water molecules tend to stick to one another by _____.

Chemistry

2 answers:

Naddika [18.5K]3 years ago

5 0

Answer: hydrogen bonding

Explanation:

Ionic bond is formed by the transfer of electrons between metals and non metals.

Covalent bond is formed by sharing of electrons between two non metals.

Hydrogen bond is the bond formed between hydrogen and an electronegative atom such as fluorine, oxygen and nitrogen.

Water molecules are bonded by strong hydrogen bonding between the hydrogen atom and the electronegative oxygen atom and thus are bonded by cohesive forces of hydrogen bonds.

ser-zykov [4K]3 years ago

4 0

Each water molecule consists of two atoms of the element hydrogen joined to one atom of the element oxygen. An interesting property of water is the ability of its molecules to “stick together.” This occurs because one side of each water molecule is slightly negative and the other side is slightly positive. The positive portion of a water molecule is attracted to the negative portion of an adjacent water molecule. As a result, water molecules are called polar molecules. They attract other water molecules like little magnets. It is most likely ionic bonding but between hydrogen and oxygen it is covalent.

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What mass of oxygen is contained in a 5.8 g sample of NaHCO3?

White raven [17]

Molar mass of NaHCO3 is 83.9. moles of Na...O3= 5.8/83.9
=0.0691
for every mole of Na..O3 there are 3 O
n(O) = n(NaHCO3) x3
= 0.207
mass of O is the moles x molar mass (16)
therefore the mass of O is 3.3 grams

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3 years ago

What is chemistry and what types of questions do chemists try to answer

Reil [10]

Answer:

Chemistry is the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

They answer questions like, like "What makes up this material?," "How does this material change when heated or cooled,?" What happens when I mix this material with another material,?" and "What rules determine how materials change in different situations?" What makes up Chemical X?

6 0

3 years ago

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X.

siniylev [52]

Lattice energy U(MX2) to calculate

Use Born-Haber(-Fajans) Cycle

http://en.wikipedia.org/wiki/Born%E2%80%...

M(s) + X2 → MX2(s) ΔHf°MX2 = -957 kJ mol^-1

M(s) →ΔHsub(M)→ M(g) ΔHsub = 123kJ mol^-1

M(g) →ΔHIE1(M)→ M^+ + e⁻ 757 kJ mol^-1

M^+→ΔHIE2(M)→ M^2+ + e⁻ 1451 kJ mol^-1

X2 →ΔHBE(X2)→ 2X +153 kJ mol^-1

X + e⁻→ΔHEA(X)→ X^- -313 kJ mol^-1

ΔHfo = U + ΔHsub(M) + IE1 + IE2 + ΔHdissX2 + 2EA1(X)

-957= U + 123 + 757 + 1451 + 153 – 626 = U + 1858

U = -2815 kJ mol^-1 The –ve sign is often dropped

5 0

3 years ago

Would a precipitate form if a solution of calcium acetate were mixed with a solution of sodium phosphate

Rom4ik [11]

A mixture of calcium acetate and sodium phosphate would produce $Ca_3(PO_4)_2$ as a precipitate.

<h3>Precipitation reaction</h3>

Precipitates are insoluble salt formed from the reaction of two soluble salts.

The equation of the reaction between calcium acetate and sodium phosphate is represented by the equation below:

$3Ca(C_2H_3O_2)_2 + 2Na_3PO_4 --- > Ca_3(PO_4)_2 + 6NaC_2H_3O_2$

The $Ca_3(PO_4)_2$ produced in the reaction is an insoluble salt and, hence, a precipitate.

More on precipitation reactions can be found here: brainly.com/question/24158764

7 0

2 years ago

Complete the following chemical equations BaCl2.2H2O

balandron [24]

Answer:

 $BaCl_2.2H_2 O > BaCl_2 + 2H_2 O$ 

Explanation:

Balancing is making the number of atoms of each element same on both the sides (reactant and product side).

To find the number of atoms of each element we multiply coefficient $\times$ subscript

For example $5 Ca_1 Cl_2$ contains

5 × 1 = 5 ,Ca atoms and

5 × 2 = 10, Cl atoms

If there is a bracket in the chemical formula

For example $3Ca_3 (P_1 O_4 )_2$ we multiply coefficient × subscript × number outside the bracket to find the number of atoms

(Please note: 3 is the coefficient, and if there is no number given then 1 will be the coefficient )

3 × 3 = 9 , Ca atoms

3 × 1 × 2 = 6, P atoms

3 × 4 × 2 = 24, O atoms are present.

Let us balance the equation given

$BaCl_2.2H_2 O > BaCl_2 + 2H_2 O$

(balanced equation)

Reactant side Elements Product side

1 Ba 1

2 Cl 2

4 H 4

2 O 2

Balanced!!!

5 0

3 years ago