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
ASHA 777 [7]
3 years ago
10

Ms. Crawford gave the following instructions to her science class:

Chemistry
2 answers:
vekshin13 years ago
8 0
A — a change in state is a good indicator of a chemical change
algol [13]3 years ago
6 0
A- the gas produced caused the balloon to blow up
You might be interested in
What is the molarity of a solution prepared from 85. 0 g cacl2 in 300. 0 g of solution? the density of the solution is 1. 05 g/m
Yuki888 [10]

Answer: 2.6 M

Explanation:

8 0
3 years ago
Select the correct answer. Given: 2Al + 6HCl → 2AlCl3 + 3H2 If the chemical reaction produces 129 grams of AlCl3, how many grams
ivann1987 [24]

The reaction produces 2.93 g H₂.

M_r:                        133.34  2.016

        2Al + 6HCl → 2AlCl₃ + 3H₂

<em>Moles of AlCl₃</em> = 129 g AlCl₃ × (1 mol AlCl₃/133.34 g AlCl₃) = 0.9675 mol AlCl₃

<em>Moles of H₂</em> = 0.9675 mol AlCl₃ × (3 mol H₂/2 mol AlCl₃) = 1.451 mol H₂

<em>Mass of H₂</em> = 1.451 mol H₂ × (2.016 g H₂/1 mol H₂) = 2.93 g H₂

7 0
3 years ago
Physical and psychological dependence, high-risk behaviour, and chronic high blood
antiseptic1488 [7]

Answer:

Physical and psychological dependence is high, and withdrawal symptoms include watery eyes, runny nose, loss of appetite, irritability, tremors, panic, abdominal cramps and diarrhea, nausea, chills, and sweating. Use of contaminated syringes/needles to inject drugs may result in serious blood borne infections such as HIV-AIDS and hepatitis.

6 0
3 years ago
Why are the molecules of hydrocarbons nonpolar?
laiz [17]
<span>This is not the case in the hydrocarbon tail. The electronegativity of hydrogen and carbon are very similar, so the electron cloud is distributed evenly over the two atoms. Carbon-hydrogen bonds are said to be non-polar because they do not have positive and negative poles within themselves. Hope this helps. </span>
4 0
3 years ago
Read 2 more answers
25 POINTS!
ryzh [129]

Answer: The Answer is B. Energy can not be created nor destroyed.

Explanation:

4 0
3 years ago
Other questions:
  • 1.....What are the 2 major divisions of Biochemistry?
    14·1 answer
  • Which of the following is not a monosaccharide?
    11·1 answer
  • calculate the number of grams of magnesium in 50g of magnesium sulfide. Use percentage composition and gravimetric factor.
    8·1 answer
  • An alcohol is 58.80 % C and 9.889 % H by mass. The rest is oxygen. What is the empirical formula of the alcohol? Enter the eleme
    9·1 answer
  • The dehydrogenation of benzyl alcohol to make the flavoring agent benzaldehyde is an equilibrium process described by the equati
    10·2 answers
  • How many moles of Al are necessary to form 45.0 g of AlBr, from this
    15·1 answer
  • Heat generated by Friction
    11·1 answer
  • If a piece of foam weighs 0.37 grams and has a density of 6.3 g/cm³, what is its volume?
    6·1 answer
  • How much of a 2.0 M NaCl solution is needed to make 205.0 mL of 0.15 M NaCl solution?
    14·1 answer
  • Which of the following conversion factors would be used to calculate the number of moles of Cl2 produced if 11 moles of HCl were
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!