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3 years ago

PLEASE HELP I WILL GIVE U BRAINLIEST :)

Chemistry

1 answer:

brilliants [131]3 years ago

5 0

Answer:

W and Z

Explanation:

Atoms of the SAME element OR two atoms of DIFFERENT elements will form a MOLECULE.

E.g. 2 atoms of hydrogen + 1 atom of oxygen => 1 molecule of water. This 1 molecule of water can also be called a compound.

Also, 2 atoms of Oxygen can combine to form 1 molecule of Oxygen. This 1 molecule of Oxygen cannot be referred to as a compound.

Atoms of DIFFERENT elements form a COMPOUND.

Therefore, compounds are molecules, but molecules are not compounds.

Thus, the combination of atoms that will form a molecule, but not a compound is:

W(oxygen) + Z(oxygen) = molecule

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3 years ago

Solve each of the following problems using one or more conver-sion factors:a. A container holds 0.500 qt of liquid. How many mil

svetoff [14.1K]

Answer:

a. 473mL.

b. 79.38kg

c. 24.47lb of fat

d. 42.5g of N.

Explanation:

a. A qt is equal to 946mL. 0.500qt are:

0.500qt * (946mL / 1qt) = 473mL

b. 1lb is equal to 0.4536kg, 175lb are:

175lb *(0.4536kg / 1lb) = 79.38kg

c. The fat in kg of the athlete is:

74kg * 15% = 11.1kg of fat. In pounds:

11.1kg * (1lb / 0.4536kg) = 24.47lb of fat

d. The mass of nitrogen in the fertilizer is:

10.0oz * 15% = 1.5oz of N

1 oz is equal to 28.35g. 1.5oz are:

1.5oz * (28.35g / 1oz) = 42.5g of N

8 0

3 years ago

Which answer correctly ranks the atoms in terms of decreasing electronegativity (the highest electronegativity first)? which ans

Degger [83]

Answer:

O, N, C, H

Explanation:

Electronegativity of an element is the property that combines the ability of its atom to lose or gain electrons. It measures the relative tendency with which the atoms of the element attracts valence electrons in a chemical bond.

On the periodic table, Electronegativity increases across the period but decreases down a group.

To solve the given problem, let us use thE Pauling's table of electronegativities to compare the electronegativities of the elements.

On the table:

C = 2.5

H = 2.1

O = 3.5

N = 3.0

In terms of decreasing electronegativities, the atoms are arranged as:

O N C H

4 0

3 years ago

Given:

galina1969 [7]

Answer: 4.74 moles

Explanation:

$2LiBr+Ba\rightarrow BaBr_2+2Li$

Moles of Ba= $\frac{\text {given mass}}{\text {molar mass}}$

Moles of Ba= $\frac{325g}{137g/mol}=2.37 moles$

According to given balanced equation,

1 mole of Barium gives 2 moles of Li

Thus 2.37 moles of Barium gives= $\frac{2}{1}\times 2.37=4.74 moles$

Thus 4.74 moles of lithium will be produced by 135 g of barium.

4 0

3 years ago

Read 2 more answers

A sample of cobalt has a mass of 27 g and a density of 9 g/cm^3. What would be its volume?

8_murik_8 [283]

Given ,

Mass of sample of cobalt = 27 g

density of sample of cobalt = 9g/cm^3

We know that ,

Density = mass of sample/volume of sample

From that relation ,

We can deduce the following as

Volume = mass of sample/density of sample

Hence , required volume of sample of cobalt = 27 g /9 g/cm^3 = 3 cm^3

The volume is $\fbox{3cm cube}$

3 0

3 years ago