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2 years ago

How can we predict how the moon will change appearance from day to day?

Chemistry

2 answers:

kvv77 [185]2 years ago

7 0

Answer:

1. When you see the moon, think of the whereabouts of the sun

2. The moon rises in the east and sets in the west, each and every day

3. The moon takes about a month (one month) to orbit the Earth

4. The moon’s orbital motion is toward the east

Explanation:

OlgaM077 [116]2 years ago

3 0

Answer:

Explanation:

The slice of sunlight continues to decrease until the moon is a waning crescent and then a new Moon. The whole cycle (from new Moon to new Moon) takes about 29.5 days. If you have a hard time remembering which way the moon phases go, just think: “white on right, getting bright!”

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A graduated cylinder holds 100 mL of water. A lead weight is dropped into the cylinder bringing the new volume up to 450 mL. If

dolphi86 [110]

11.43g/mL

Explanation:

Given parameters:

Volume of water in the graduated cylinder = 100mL

Volume of water + lead weight = 450mL

Mass of lead weight = 4000g

Unknown:

Density of the lead weight = ?

Solution:

Density is the mass per unit volume of a body.

Density = $\frac{mass}{volume}$

Volume of the lead weight = volume of water displaced

Volume of lead weight = 450 - 100 = 350mL

Density = $\frac{4000}{350}$ = 11.43g/mL

learn more:

Density brainly.com/question/2690299

#learnwithBrainly

6 0

2 years ago

Oxalic acid is a diprotic acid. calculate the percent of oxalic acid (h2c2o4) in a solid given that a 0.7984-g sample of that so

vlada-n [284]

This method of quantitative determination of percent purity is titrimetric reactions. These reactions most commonly involve neutralization reactions between an acid and a base. Then, we look at the neutralization reaction:

H₂C₂O₄ + 2 NaOH ⇒ Na₂C₂O₄ + 2 H₂O

So, we do the stoichiometric calculations. The important data we should know is the molar mass of oxalic acid which is equal to 90 g/mol.

(0.2283 mol/L NaOH * 0.3798 L * 1 mol H₂C₂O₄/ 2mol NaOH * 90 g/mol H₂C₂O₄) ÷ 0.7984 g *100%
= 488%

This is impossible. The purity can't be more than 100%. Looking at our calculations and the balance reaction, all steps were done correctly. So, I think there is some typographical error in the given. The mass of the sample should be 7.984 g. Then, the answer would be 48.87% purity.

5 0

2 years ago

Read 2 more answers

The double bond between carbon and oxygen is similar to an alkene C-C, except that C o is: a) shorter and weaker. b) shorter and

mina [271]

Answer:

the double bond between c and o is shorter and weaker

Explanation:

this is because the bond between c and o involves unequal sharing of electrons whole c and c involves hybridization sp2 of orbitals and also catenation phenomenon in which carbon could form long chain with it's other carbon

5 0

2 years ago

As the pressure on a gas confined above a liquid increases, the solubility of the gas in the liquid

Gelneren [198K]

As the pressure on the on a gas cofined above a liquid increases, the solubility of the gas will increase

this also happen when we lower the temperature

4 0

2 years ago

Read 2 more answers

Like many other organic solvents we will use this semester, ethanol is flammable and caution needs to be exercised when heating

laiz [17]

Answer:

See explanation

Explanation:

A flammable solvent refers to a solvent that catches fire easily. The precautions to be taken when working with flammable solvents are;

1) heat the solvent at a low to medium hot plate setting.

2) if you need to boil the solvent, use a condenser rather than a flask or beaker without a cover.

3) make sure that the hotplate is larger than the vessel containing the mixture that is being heated.

4) do not use strong oxidizing agents

5 0

2 years ago