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Liono4ka [1.6K]
3 years ago
13

a car increases velocity from 30 m/s to 60 m/s in 4 seconds. calculate the average acceleration of the car over this time.

SAT
1 answer:
Vikentia [17]3 years ago
5 0
Hey
Here it is!! Can u give me a brainliest answer????

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In 2009, regulations for credit cards were changed bya. agreements between bankers and borrowersb. the credit cardholders' bill
aleksklad [387]
I think you have your question confused
6 0
3 years ago
A salt shaker is filled with 25 g sodium chloride. How many mole(s) of nacl does it contain?
AleksAgata [21]

Considering the definition of molar mass, a salt shaker contains 0.43 moles of sodium chloride.

<h3>Definition of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

<h3>Molar mass of NaCl</h3>

In this case, you know the molar mass of the elements is:

<h3>Na= 23 g/mole</h3><h3>Cl= 35.45 g/mole</h3>

So, the molar mass of the compound NaCl is calculated as:

NaCl= 23 g/mole + 35.45 g/mole

Solving:

NaCl= 58.45 g/mole

<h3 /><h3>Amount of moles of 25 grams of NaCl</h3>

Next, you can apply the following rule of three: If by definition of molar mass 58.45 grams of the compound are contained in 1 mole, 25 grams of the compound are contained in how many moles?

amount of moles=\frac{25 gramsx1 mole}{58.45 grams}

<u><em>amount of moles= 0.43 moles</em></u>

Finally, a salt shaker contains 0.43 moles of sodium chloride.

Learn more about molar mass:

<u>brainly.com/question/5216907</u>

<u>brainly.com/question/11209783</u>

<u>brainly.com/question/7132033</u>

<u>brainly.com/question/17249726</u>

3 0
2 years ago
Positive Effects of Genetic Engineering
Tamiku [17]

Answer:

  • <u>Disease Prevention</u> - One of the top goals of genetic engineering is the improvement of health.Those working in the genetics field hope that manipulating the genes of humans will one day enable science to prevent people from contracting these potentially deadly diseases. Some diseases are more likely in certain people because they have a history of the disease in the family, meaning it could be passed down and make someone predisposed to a particular illness.
  • <u>Then there is,</u> Pharmaceutical Development- Genetic engineering can be used to improve the drugs available on the marketplace by making them more effective and safer. By using genetic modification scientists can make pharmaceuticals more effective than the existing versions of the medicine.
  • <u>Finally, Agriculture</u> - Saving the seeds from the best looking plants to replant the following year has been a method of manual genetic selection for many years. But science has made it possible to engineer plants to produce the biggest and best fruits and vegetables possible by replacing the genes and designing plants with the most desirable traits.

* Hopefully this helps:) Mark me the brainliest:)!!!

~234483279c20~

6 0
3 years ago
Read 2 more answers
A bag of marbles contains 4 red marbles and 4 green marbles.
LenKa [72]

Answer:

Whats the question?? if its ratios then 4:4 and if its fractions red: 4/8 and green:4/8

Explanation:

7 0
3 years ago
zeb is a retail store employee. he organizes merchandise and will answer customer questions. recently, his boss gave him the add
puteri [66]

The scenario described highlights a considerable increase in the number of job responsibilities zeb is expected to carryout. Hence, this is an example of job enlargement.

  • When an employee is given additional tasks to perform which isn't part of his normal or initial responsibilities.

  • In the scenario, Zeb has seen a considerable increase in the duties he his to perform in addition to being a reteil store employee.

Therefore, Zeb's job has been increased due to the additional responsibilities he has been charged with. Hence, his job has been enlarged.

Learn more :brainly.com/question/14009664

8 0
2 years ago
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