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
slega [8]
4 years ago
12

What three achievements in space exploration that involved The United States

Chemistry
2 answers:
mixer [17]4 years ago
7 0
They launched its 1st space station called Skylab
Marta_Voda [28]4 years ago
6 0
I do not know but I think one was landing a man on the moon
You might be interested in
You place your hand on the thermos what type of transfer is taking place
AlexFokin [52]

Answer:

conduction

Explanation:

Conduction happens when 2 objects with different temperatures come in contact with each other. The heat transfers from the hotter object to the cooler object.Apr

4 0
3 years ago
Read 2 more answers
Which is an example of an endothermic reaction?
Solnce55 [7]
Nuclear explosion i hope that correct
4 0
3 years ago
Read 2 more answers
Activation energy Group of answer choices is only required in catabolic reactions that release energy. is not required at all wh
daser333 [38]

Answer:

is used to break reactant bonds and/or make new product bonds.

Explanation:

<em>The correct answer would be that </em><em>activation energy is used to break reactant bonds and/or make new product bonds</em><em>.</em>

The <u>activation energy is the minimum energy that must be overcome by the reactants in a reaction in other to become products</u>. In order for products to be formed, the bonds between reactants must be broken and new ones must be formed to arrive at the products. In other words, the activation energy can be seen as the energy required to break the bonds between reactants and form the bonds between products during the course of a reaction.

<em>Activation energy is required even in the presence of enzymes. The latter only catalyzes reactions by lowering the minimum energy required to break the bonds between reactants and form new ones between products</em>.

5 0
3 years ago
How many moles of sodium are present in 17 g of Na?
11Alexandr11 [23.1K]

Answer:

1. 0.74mol

2. 0.42mol

3. 2.125mol

4. 0.301mol

5. 4.52 × 10^23 particles

Explanation:

Number of moles (n) in a substance can be found using the formula:

mole (n) = mass/molar mass

Using this formula, the following moles are calculated:

1. Molar of Na = 23g/mol

mole = 17/23

mole = 0.74mol

2. Molar mass of Na2SO4 = 23(2) + 32 + 16(4)

= 46 + 32 + 64

= 142g/mol

Mole = 60/142

mole = 0.42mol

3. Molar mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

mole = 93.5/44

mole = 2.125mol

4. Molar mass of sodium nitrate (NaNO3) = 23 + 14 + 16(3)

= 23 + 14 + 48

= 85g/mol

mole = 25.6/85

mole = 0.301mol

5. Number of particles in one mole of a substance is 6.022 × 10^23 particles. Hence, in 0.75mol of calcium hydroxide (Ca(OH)2, there will be;

0.75mol × 6.02 × 10^23

= 4.515 × 10^23

= 4.52 × 10^23 particles

8 0
3 years ago
BRAINLIESTTT ASAP!!! PLEASE HELP ME :)
Ahat [919]

Every science experiment should follow the basic principles of proper investigation so that the results presented at the end are seen as credible.

Observation and Hypothesis. ...

Prediction and Modeling. ...

Testing and Error Estimation. ...

Result Gathering and Presentation. ...

Conclusions. ...

Law Formation.

6 0
4 years ago
Read 2 more answers
Other questions:
  • which contributes to acid rain? A. burning fossil fuels B. nuclear power C. solar power D. hydroelectric power
    8·1 answer
  • What type of substances does conduction work best in? in other words what substances are good conductors?
    7·1 answer
  • What’s the basic building block of all matter
    13·2 answers
  • how many milliliters of 0.200 m fecl3 are needed to react with an excess of na2s to produce 2.75 g of fe2s3 if the percent yield
    11·1 answer
  • 3. A sample of octane (C3H18) gas has a mass of 1.135 g at a volume of 400. cm'3 and a temperature
    5·1 answer
  • Which statement below is true?
    5·1 answer
  • Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) Wha
    12·1 answer
  • Type of reaction based on the reactants<br> FeCl3 +K →
    13·1 answer
  • ¿Cuántos moles de aluminio (AI) se necesitan para formar 3,7 mol de Al2O3? 4Al(s) + 302 (g) -&gt; 2A1203 (s) ​
    8·1 answer
  • Can someone PLEASE help me with this im struggling bad
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!