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
Ksju [112]
4 years ago
6

Which activity requires a new pair of gloves?

Chemistry
1 answer:
Basile [38]4 years ago
7 0

Answer:

Even without specifics, my answer would be all of them.

Explanation:

Technically, you need a new pair of gloves after every experiment, which is what my science teacher taught me, so all of them.

You might be interested in
Please help me I need to finish before my class is over
solniwko [45]

Number 3 is D

Number 4 is B

Number 5 is B

I think

6 0
3 years ago
Read 2 more answers
How can an electron have no net electrical charge?
solong [7]
Well not to sure if that statements true... but in hydrogen for example both its proton and electron have an electric charge but one has a + charge (proton) and the other a - charge (electron) so they end up cancelling so there is no net electrical charge 

hope that helps 
6 0
3 years ago
1. Give 2 examples of what organisms compete for in an ecosystem.)​
Lena [83]
Competition will occur between organisms in an ecosystem when their niches overlap, they both try to use the same resource and the resource is in short supply. Animals compete for food, water and space to live. Plants compete for light, water, minerals and root space.
3 0
2 years ago
The isotope 'Sr has a half-life of 28.8 years. What is the activity, measured in atoms/second, of a 50 mg sample of "Sr? (10 pts
sleet_krkn [62]

Answer:

The activity of 50mg of Sr is 2.63x10^{11} atoms/second

Explanation:

Every nuclear disintegration follows the first order rate, thus the half-life (t1/2) is t_{1/2} =\frac{Ln 2}{k} where k is the constant of the reaction.

<em>Considering 1 year equals 3.15x107 seconds</em>

\frac{28.8year x.3.15x10^{7}s }{1 year} = 9.072x10^{8} s

For Sr with t1/2 = 9.072x10^{8} s , the constant of the reaction is

k =\frac{Ln 2}{t_{1/2}}=\frac{Ln 2}{9.072x10^{8} s } = 7.64x10^{-10} s^{-1}

The activity (A) of a nucleus is A = k.N where N is the number of nucleus. Sr molecular mass is 87.6g/mol and every mol contains 6.023x1023 atoms, thus

\frac{50x10^{-3}g x 6.022x10^{23} atoms}{87.6g} = 3.44x10^{20} atoms

Therefore, the activity of 50mg of Sr is

A = k.N = 7.64x10^{-10} s^{-1} x 3.44x10^{20}atoms = 2.63x10^{11} atoms/second

4 0
3 years ago
A metal has higher reactivity than mag esoum where would the metal be on a periodic table
Butoxors [25]

Answer is: below magnesium in group 2 or in group 1 (left from magnesium).

Reactivity series is an empirical progression of a series of metals, arranged by their reactivity from highest to lowest (alkaline metals have highest reactivity and Noble metals lowest reactivity).

This series are used to summarize information about the reactions of metals with acids or water, double displacement reactions (more reactive metals displace metals with lower reactivity) and the extraction of metals from their ores.

Sodium and potassium (group 1 - alkaline metal) are more reactive than magnesium.

Strontium and barium (group 2 in periodic table) are higher in this group from magnesium. Strontium is stronger reducing agent than magnesium, gives electrons easier.

5 0
4 years ago
Other questions:
  • 32.7 grams of water vapor takes up how many liters at standard temperature and pressure (273 K and 100 kPa)?
    5·1 answer
  • What are the key characteristics of a synthesis reaction
    7·1 answer
  • What is water in a scientific knowledge​
    11·1 answer
  • Which gas laws apply to each of the steps of the 4 stroke engine?
    6·1 answer
  • Which of the following specifies the correct reducing agent in the given redox reaction? View Available Hint(s) Which of the fol
    9·1 answer
  • Write the complete balanced equation for the following reaction:
    5·1 answer
  • How many grams of carbon dioxide are in 35.6 liters of co2
    14·1 answer
  • 7. What is a meteorite? It is a
    10·1 answer
  • In this project, you will research the harm that can be done to your health by environmental factors. Using the resources of you
    6·1 answer
  • Chemical A and Chemical B react in an exothermic reaction. What can be known about what will happen when Chemical A and Chemical
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!