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koban [17]
4 years ago
11

where are chemicals found at work? answer 1- in every work area answer 2-only in food preperation answer 3-only in carpets or pa

int answer 4- only in cleaing products
Chemistry
1 answer:
vivado [14]4 years ago
6 0

Answer:

In every work area

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Which of these statements can be predicted with the help of science?
stira [4]

Answer:

Changes in Climate

Explanation:

because i got it right

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3 years ago
A piece of unknown solid substance weighs 437.2 g, and requires 8460 J to increase its temperature from 19.3 °C to 68.9 °C.What
Pachacha [2.7K]

Answer:

0.3832

Explanation:

Givens

m = 437.2 grams

c = ?

delta t = 69.8 - 19.3

H = 8460 J

Formula

H = m*c*Δt

Solution

8460 = 437.2 * c * (69.8 - 19.3)

8460 = 437.2 * c * 50.5

8460 = 22078.6 * c

c = 8460 / 22078,6

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3 years ago
How many molecules of o2 are there in 4.0 mol of o2?
Setler79 [48]
Each and every mole of any substance = Avogadro's Number of them
= 6.023 \times  {10}^{23}  \\ 4.0moles \: O2 \times  \frac{6.023 {10}^{23}molecules }{1mole}  \\  = 2.41 \times  {10}^{24}  \: molecules \: of \: O2
5 0
3 years ago
The gases listed are at standard temperature and pressure:
Len [333]

Answer:

The volumes of 1 mol of CO, and 1 mol of N, gases are the same.

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Equal volumes of gases have the same number of moles.

4 0
3 years ago
Who discovered electron ???
Zanzabum

It was a Cambridge UK scientist in the early part of the 20 th century who discovered the electron. His name was J J Thompson.

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