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
san4es73 [151]
3 years ago
6

Which must you do before designing an experiment?

Chemistry
1 answer:
Vlad [161]3 years ago
6 0
The answer is D. just like the other guy said...
You might be interested in
Draw an energy diagram for an endothermic and exothermic reaction and label the diagram ​
just olya [345]
Energy diagram for and endothermic and exothermic reaction

5 0
3 years ago
Read 2 more answers
How many moles of n are in 0.163 g of n2o?
zimovet [89]

First convert 0.163 grams of N2O to mol by dividing it with the molecular weight. The molecular weight of N2O is 44 grams/mol. The answer would be 3,79x10^-3. Then multiply it with 2 since there are 2 Nitrogen in one mole of N2O. Therefore, there are 7.41x10^-3 moles of Nitrogen. 

3 0
4 years ago
Read 2 more answers
A chemical company makes two brands of antifreeze. the first brand is 70% pure antifreeze, and the second brand is 95% pure anti
madreJ [45]

Answer is: 56 gallons of 70% antifreeze and 84 gallons of 95% antifreeze.


ω₁ = 70% ÷ 100% = 0.7; 70% pure antifreeze.

ω₂ = 95% ÷ 100% = 0.95.

ω₃<span> = 85% ÷ 100% = 0.85.
V</span>₁ = ?; volume of 70% antifreeze.

V₂ = ?; volume of 95% antifreeze.<span>
V</span>₃ = V₁ + V₂<span>.
V</span>₃ = 140 gal.

V₁ = 140 gal - V₂<span>.
ω</span>₁ · V₁ + ω₂ ·V₂ = ω₃ · V₃.

0.70 · (140 gal - V₂) + 0.95 · V₂ = 0.85 · 140 gal.

98 gal - 0.7V₂ + 0.95V₂ = 119 gal.

0.25V₂ = 21 gal.

V₂ = 21 gal ÷ 0.25.

V₂ = 84 gal.

V₁ = 140 gal - 84 gal.

V₁ = 56 gal.

4 0
4 years ago
How do forces between particles in gases compare to forces in the other
Ber [7]

Answer:

A. The forces in gases are weaker than forces in solids but stronger

than forces in liquids.

5 0
2 years ago
Which compound is classified as a hydrocarbon?
Andrej [43]
<span>(2) butynu........................</span>
5 0
4 years ago
Read 2 more answers
Other questions:
  • Which equation represents a neutralization reaction?
    11·1 answer
  • If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a
    5·2 answers
  • Which element is oxidized in the following reaction: 2FeCl₂ + Cl₂→2FeCl₃ if Fe goes from + 2 to +3 and Cl goes from 0 to −2?
    5·1 answer
  • Does anyone know the answer?????​
    9·1 answer
  • Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. The sample is spotted on a TLC plate
    13·1 answer
  • Easons for the dense packing in metals <br>​
    14·1 answer
  • Calculate the moles of benzoic acid (C6H5COOH) in a 55.66 g sample of benzoic acid
    14·1 answer
  • Differences between a weak acid and a dilute acid​
    10·2 answers
  • What charge is there on a lithium ion?
    11·2 answers
  • How much heat is needed to raise a 0.30 g piece of aluminum from 30.C to 150C? The specific heat of aluminum 0.900j/gC
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!