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motikmotik
3 years ago
11

Jade wants to measure the thickness of a copper wire. She wound the copper wire 30 times around a pencil and used a ruler to mea

sure the length of the wound wire as shown in the figure.
Section of ruler is shown next to a pencil with a wire wound around it. The markings on the ruler are from zero to two centimeters. There are two small markings, one is between zero and one and the other is between one and two. The length of the entire wound wire starts at zero and goes to the small marking which is exactly between one and two.

Which of these is the most accurate thickness of the copper wire? (1 point)

0.001 cm

0.005 cm

0.01 cm

0.05 cm
Chemistry
2 answers:
Gala2k [10]3 years ago
3 0

Answer: 0.05

Explanation:Divide the length (1.5 cm) by the number of turns (30)

Nitella [24]3 years ago
3 0

Answer:

0.05

Explanation:

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How many water molecules does it contain? The density of water is 1.0 g/cm3.
max2010maxim [7]

Complete question is;

A drop of water has a volume of approximately 7 × 10⁻² ml. How many water molecules does it contain? The density of water is 1.0 g/cm³.

This question will require us to first find the number of moles and then use avogadro's number to get the number of water molecules.

<em><u>Number of water molecules = 2.34 × 10²¹ molecules</u></em>

We are given;

Volume of water; V = 7 × 10⁻² ml

Density of water; ρ = 1 g/cm³ = 1 g/ml

Formula for mass is; m = ρV

m = 1 × 7 × 10⁻²

m = 7 × 10⁻² g

from online calculation, molar mass of water = 18.01 g/mol

Number of moles(n) = mass/molar mass

Thus;

n = (7 × 10⁻²)/18.01

n = 3.887 × 10⁻³ mol

from avogadro's number, we know that;

1 mol = 6.022 × 10²³ molecules

Thus,3.887 × 10⁻³ mol will give; 6.022 × 10²³ × 3.887 × 10⁻³ = 2.34 × 10²¹ molecules

Read more at; brainly.in/question/17990661

6 0
3 years ago
Which particles have a similar relative mass
olganol [36]

Answer:

c ) protons and neutrons

Explanation:

Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron). The positive charge on a proton is equal in magnitude to the negative charge on an electron.

7 0
3 years ago
The _______ gives the smallest whole number ratio of moles of each element in a compound. therefore, multiple compounds may have
nasty-shy [4]

The <u>Empirical formula</u> gives the smallest whole number ratio of moles of each element in a compound. therefore, multiple compounds may have it in common.

<h3>What is Empirical formula?</h3>

The most straightforward whole number ratio of atoms in a compound is its empirical formula. The empirical formula for sulfur monoxide, or SO, and disulfur dioxide, or S2O2, are both straightforward illustrations of this idea.

<h3>What is multiple compounds?</h3>

According to the law of multiple proportions, if two elements combine to form more than one compound, the ratio of the second element's mass to the fixed mass of the first element will always be a ratio of tiny whole numbers.

<h3>What is empirical formula used for?</h3>

Typically, the empirical formula is used to simply display the components of a molecule. When one needs to quickly identify the elements they are working with, this is helpful. When you want to know how many atoms of each element are present in the molecule, the molecular formula is most helpful.

To know more about empirical formula visit:

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3 0
2 years ago
Which compounds have the empirical formula CH2O?
lara [203]

Answer:

The answer to your question is all the formulas in bold has the same empirical formula

Explanation:

Data

Empirical formula     CH₂O

Process

To solve this problem factor the subscripts of each formula and compare the result with the empirical formula given.

a) C₂H₄O₂      factor 2          2(CH₂O)

b) C₃H₆O₃      factor 3          3(CH₂O)

c) CH₂O₂        this formula can not be simplified

d) C₅H₁₀O₅      factor 5         5(CH₂O)

e) C₆H₁₂O₆      factor 6         6(CH₂O)

8 0
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Convection currents are caused by differences in what 2 things?
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Energy and the nature of the current
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