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nikdorinn [45]
3 years ago
6

When you push or pull something, you are creating

Chemistry
1 answer:
Katarina [22]3 years ago
3 0

force but could be tension

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High concentrations of carbon monoxide CO can cause coma and possible death. The time required for a person to reach a COHb leve
prohojiy [21]

Answer:

The exposure time that equals 750 is 3.4 hr

Explanation:

The given formula is:

[tex]T=.0002*x^{2} -.316*x+127.9[/tex]

In the formula:

T= exposure time

x= carbon monoxide present in ppm

So, to calculate the exposure time when carbon monoxide is 750ppm, you should replace the "x" by 750.

[tex]T=.0002*750^{2} -.316*750+127.9[/tex]

T=3.4hr

8 0
3 years ago
What is the empirical formula of a compound containing 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen? A. C3H4N B. C2
Ierofanga [76]

Answer:

A. C₃H₄N

Explanation:

  • Firstly, we need to calculate the no. of moles of C, H, and N using the relation:

<em>no. of moles = mass/molar mass.</em>

<em></em>

∴ no. of moles of C = mass/molar mass = (90.0 g)/(12.0 g/mol) = 7.5 mol.

∴ no. of moles of H = mass/molar mass = (11.0 g)/(1.0 g/mol) = 11.0 mol.

∴ no. of moles of N = mass/molar mass = (35.0 g)/(14.0 g/mol) = 2.5 mol.

  • We should get the mole ratio of each atom by dividing by the lowest no. of moles (2.5 mol of N).

∴ the mole ratio of C: H: N = (7.5 mol/2.5 mol): (11.0 mol/2.5 mol): (2.5 mol/2.5 mol) = (3: 4.4: 1) ≅ (3: 4: 1).

  • So, the empirical formula is: A. C₃H₄N.
3 0
4 years ago
Hydrochloric acid is widely used as a laboratory reagent, in refining ore for the production of tin and tantalum, and as a catal
GaryK [48]

Answer:

Option 4

Explanation:

Hydrochloric acid is a strong one, that gives protons to medium. It can be dissociated as this:

HCl  →  H⁺  + Cl⁻

M means Molarity. It is a sort of concentration that indicates the moles of solute in 1L of solution.

M = moles / volume (L)

We can also say M = mmoles / mL of solution

M . mL = mmoles

0.453 M . 62.85mL = 28.5 mmoles

If we divide by 1000 → 28.5 mmol . 1 mol / 1000 mmol = 0.0285

3 0
3 years ago
Kim Chemist proposes that increasing the proportion of butadiene in her glue formulation will make the glue stickier. Her propos
Sunny_sXe [5.5K]

Answer: option D) hypothesis

Explanation:

Kim proposal is an hypothesis, because it is an assumption that will ONLY be accepted as true (i.e becomes a theory) when butadiene successfully makes the glue stickier in several conducted experiments.

But, at the moment Kim proposal is an hypothesis.

7 0
4 years ago
Jeff has 10 grams of water and 10 grams of vegetable oil in separate containers. both liquids have a temperature of 24°c. jeff h
Tema [17]

ANSWER: From this experiment, Jeff can conclude that the heat capacity of oil is lower than that of water which means that oil requires less energy per gram of liquid in order to change its temperature.

3 0
2 years ago
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