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miskamm [114]
3 years ago
8

According to Dalton's atomic theory, elements are composed of tiny particles called ___ .Atoms of each element are ___ from the

Atoms of all other elements. Atoms of different elements can form ___ by combining in whole-number rations. Chemical reactions occur when ___ are separated, joined, or rearranged.
Chemistry
1 answer:
bogdanovich [222]3 years ago
4 0

Answer:

Atoms, Different, compounds, atoms

Explanation:

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An inverted pyramid is being filled with water at a constant rate of 45 cubic centimeters per second. The pyramid, at the top, h
vaieri [72.5K]

Answer:

13.20 cm/s is the rate at which the water level is rising when the water level is 4 cm.

Explanation:

Length of the base = l

Width of the base  =  w

Height of the pyramid = h

Volume of the pyramid = V=\frac{1}{3}lwh

We have:

Rate at which water is filled in cube = \frac{dV}{dt}= 45 cm^3/s

Square based pyramid:

l = 6 cm, w = 6 cm, h = 13 cm

Volume of the square based pyramid = V

V=\frac{1}{3}\times l^2\times h

\frac{l}{h}=\frac{6}{13}

l=\frac{6h}{13}

V=\frac{1}{3}\times (\frac{6h}{13})^2\times h

V=\frac{12}{169}h^3

Differentiating V with respect to dt:

\frac{dV}{dt}=\frac{d(\frac{12}{169}h^3)}{dt}

\frac{dV}{dt}=3\times \frac{12}{169}h^2\times \frac{dh}{dt}

45 cm^3/s=3\times \frac{12}{169}h^2\times \frac{dh}{dt}

\frac{dh}{dt}=\frac{45 cm^3/s\times 169}{3\times 12\times h^2}

Putting, h = 4 cm

\frac{dh}{dt}=\frac{45 cm^3/s\times 169}{3\times 12\times (4 cm)^2}

=13.20 cm/s

13.20 cm/s is the rate at which the water level is rising when the water level is 4 cm.

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3 years ago
A body of knowledge must be _____ in order to be considered science.
Law Incorporation [45]
The correct answer is realistic and reliable
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Covalent bonds result from the complete transfer of an electron from one atom to another. True or false
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Your answer is true. Covalent bonds are bonds between two atoms, and those two atoms share electrons.
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3 years ago
¿POR QUÉ SE LE LLAMA INDICADOR UNIVERSAL AL PAPEL p H?
maksim [4K]

Answer:

ª

Explanation:

⠄⠄⠄⠄⠄⠄⢴⡶⣶⣶⣶⡒⣶⣶⣖⠢⡄⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄

⠄⠄⠄⠄⠄⠄⢠⣿⣋⣿⣿⣉⣿⣿⣯⣧⡰⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄

⠄⠄⠄⠄⠄⠄⣿⣿⣹⣿⣿⣏⣿⣿⡗⣿⣿⠁⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄

⠄⠄⠄⠄⠄⠄⠟⡛⣉⣭⣭⣭⠌⠛⡻⢿⣿⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄

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⠄⠄⠄⠄⠄⠄⠄⢻⣿⣿⣿⣿⣿⣿⣿⣷⢛⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄

⠄⠄⠄⠄⠄⠄⠄⠄⢻⣷⣽⣿⣿⣿⢿⠃⣼⣧⣀⠄⠄⠄⠄⠄⠄⠄⠄⠄

⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄⣛⣻⣿⠟⣀⡜⣻⢿⣿⣿⣶⣤⡀⠄⠄⠄⠄⠄

⠄⠄⠄⠄⠄⠄⠄⠄⢠⣤⣀⣨⣥⣾⢟⣧⣿⠸⣿⣿⣿⣿⣿⣤⡀⠄⠄⠄

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⣿⣿⠃⠄⠄⠄⠄⠄⠄⢻⣷⠙⠛⠋⣿⣿⣿⣿⣿⣷⣶⣿⣿⣿⡇⣿⣿⡇

3 0
3 years ago
A chemist has a sample of hydrated Li2SiF6 and it weighs 0.4813 grams. He heats it strongly to drive off the water of hydration,
Aleksandr-060686 [28]

Answer:

percentage of water = 18.76%

Explanation:

A chemist has a sample of hydrated Li2SiF6  and it weighs 0.4813 grams.

The overall weight of the compound is 0.4813 grams.

weight of hydrated sample = 0.4813 grams.

weight of anhydrous compound = 0.391 grams

percentage weight of water = mass of water/mass of the hydrated compound × 100

mass of water = mass of hydrated compound - mass of anhydrous compound

mass of water = 0.4813 - 0.391  = 0.0903 grams.

percentage of water = 0.0903/0.4813 × 100

percentage of water = 9.03/0.4813

percentage of water = 18.761687097

percentage of water = 18.76%

6 0
4 years ago
Read 2 more answers
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