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ASHA 777 [7]
3 years ago
15

A man needs to lift a heavy box on the back of a truck or push up a ramp or lift it straight up from the ground to use around he

won't have to move the box over a longer distance what did is the benefit of using a ramp to get the box
Chemistry
1 answer:
Nesterboy [21]3 years ago
3 0
The benefits are with the aid of equipment work load is reduced therefore it is great to have as many aiding tool to assist on work
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The following data is given to find the formula of a Hydrate:
umka21 [38]

The masses can be found by substractions:

  • Mass of CaSO₄.H2O (hydrate):

16.05 g - 13.56 g = 2.49 g

  • Mass of CaSO₄ anhydrate:

15.07 g - 13.56 g = 1.51 g

  • The mass of water is equal to the difference between the mass of the hydrate and the mass of the anhydrate:

2.49 g - 1.51 g = 0.98 g

  • The percent of water is found by the formula:

massWater ÷ massHydrate * 100%

0.98 g ÷ 2.49 g * 100% = 39.36%

  • The mole of water is calculated using water's molecular weight (18g/mol):

0.98 g ÷ 18 g/mol = 0.054 mol water

  • A similar procedure is made for the mole of salt (CaSO₄ = 136.14 g/mol)

1.51 g ÷ 136.14 g/mol = 0.011 mol CaSO₄

  • The ratio of mole of water to mole of anhydrate is:

0.054 mol water / 0.011 mol CaSO₄ = 0.49

In other words the molecular formula for the hydrate salt is CaSO₄·0.5H₂O

3 0
3 years ago
Which of the following is an example of a molecule?
xxMikexx [17]
O2 is an example of a molecule
5 0
3 years ago
Can a bad thermostat cause radiator to blow
erastova [34]
I don't exactly know but probably so.
3 0
3 years ago
Classify each of the following properties as physical or chemical: A. Ice melts in the sun. B. Copper is a shiny metal. C. Paper
vampirchik [111]

Answer:

The answer to your question is below

Explanation:

Physical properties are the properties in which there is no change in the nature of the substance  but there is a change in the physical state.

Chemical properties are the properties in which the substance changes its nature. A new substance is formed.

A. Ice melts in the sun. Physical p.

B. Copper is a shiny metal. Physical p.

C. Paper can burn. Chemical p.

D. A silver knife can tarnish. Physical p.

E. A magnet removes iron particles from a mixture. Physical p.

8 0
3 years ago
A certain first-order reaction has a half-life of 20.0 minutes. How much time is required for this reaction to be 75% complete?
ryzh [129]

Answer:

X = 2

Explanation:

As you know, the rate of a first-order reaction depends linearly on the concentration of a single reactant. The rate of a first-order reaction that takes the form

3 0
3 years ago
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