1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bekas [8.4K]
2 years ago
8

Ms. Fremont spent last weekend grading tests . If she spent 4 min on each test , how many hours did it take her to grade all 74

tests ?
Chemistry
1 answer:
Rudiy272 years ago
4 0

Answer:

about 5 hours

Explanation:

When doing this problem you mmust mulitiply 4 x 74 and divide the answer by 60 because 60=1 hour.

You might be interested in
A hiker climbs a hill. How does the potential energy of the hiker change as she climbs higher?
zloy xaker [14]
The answer should be A
6 0
3 years ago
When electricity flows through water, the water molecules split into molecules of hydrogen and oxygen gas. How many oxygen (O2)
ikadub [295]
That would be one oxygen molecule.
5 0
3 years ago
Read 2 more answers
Many hospitals, and some doctors\' offices, use radioisotopes for diagnosis and treatment, or in palliative care (relief of symp
Phantasy [73]

Answer:

a) ^{131}_{53} I

b) ^{192}_{77} Ir

c) ^{153}_{62} Sm

Explanation:

The symbols of the isotopes are written like

^{A}_{Z} X

where,

X is the element

A is the mass number (protons + neutrons)

Z is the atomic number (protons)

<em>a) Iodine-131</em>

The atomic number of iodine is 53. The mass number of this isotope is 131. The symbol is ^{131}_{53} I.

<em>b) Iridium-192</em>

The atomic number of iridium is 77. The mass number of this isotope is 192. The symbol is ^{192}_{77} Ir.

<em>c) Samarium-153</em>

The atomic number of samarium is 62. The mass number of this isotope is 153. The symbol is ^{153}_{62} Sm.

8 0
2 years ago
Explain why the elements of groups 1 and 7 are mostly used in<br> the form of compound
docker41 [41]
Group 1 and group 7 of element group consists of alkali metal, which are generally combined with other elements in nature, so they have properties of compound
8 0
2 years ago
What are the products of any combustion reaction involving a hydrocarbon
sweet [91]

Answer:

<em><u>The products of the combustion of hydrocarbons are carbon dioxide and water. Many hydrocarbons are used as fuel because their combustion releases very large amounts of heat energy.</u></em>

4 0
2 years ago
Read 2 more answers
Other questions:
  • Condensation is-
    6·1 answer
  • What is atomic mass of an element stands for
    12·1 answer
  • 1.
    7·2 answers
  • What is AgNO3 + KCI-KNO3+AgCI. What type of reaction does this represent
    6·1 answer
  • The increase in the population of people living in urban areas will cause a decrease in urban sprawl.
    15·2 answers
  • When na2cro4(aq) and agno3(aq) are mixed, a red colored precipitate forms which is?
    11·1 answer
  • Which of the following can be mixed in solution with NH2 to make a buffer?
    15·2 answers
  • Mention the advantage of Mercury over alcohol when they are used as thermal thermometric liquid​
    11·1 answer
  • How many grams of NH3 are in 45.9
    12·1 answer
  • How can we show the data that is collected
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!