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
dem82 [27]
3 years ago
13

Which two pieces of evidence support the conclusion that the total amount of energy in a closed system remains the same?

Chemistry
1 answer:
Gnoma [55]3 years ago
3 0

Answer:

A,C

Explanation:

You might be interested in
What coefficients must be added to balance the following reaction __Sn+___H3PO4___=H2+___Sn3(PO4)4
BARSIC [14]
Answer 3Sn+ 4H3pO4= 6H2+Sn(PO)4

1 Sn                                  3 Sn
3 H                                    2 H
1 P                                    4 P
4 O                                    16 O
 then you have to make the numbers the same for each side

so you get by putting the 3 infront of Sn 4 infront of the H3PO4  and 6 infront of the H2
3 Sn                                   3 Sn
12 H                                    12 H
4 P                                      4 P
16 O                                     16 O
5 0
3 years ago
(b) Why must acidic gases be treated before they are released into the atmosphere?
Inga [223]

Answer:

because they react with other gases of atmosphere and pollute the environment

8 0
3 years ago
A compound contains 0.5 mol Na, 0.5 mol N, and 10 mol H. The empirical formula of the
lesya [120]

Answer:

NaNH₂₀

Explanation:

0.5 mol Na, 0.5 mol N, and 10 mol H

To obtain the empirical formulae, we find the mole ratio between the elements and this is done by dividing all through by the smallest mol (0.5)

Na = 0.5 / 0.5 = 1

N = 0.5 / 0.5 = 1

H = 10 / 0.5 = 20

The mole ratio is used to write the empirical formulae. It is given as;

NaNH₂₀

8 0
3 years ago
What is the chemical formula of iron (II) sulfide would be: (EO S = +2 and EO Fe = +2). please
Anni [7]

Answer:

FeS

Explanation:

The reason why their is no subscripts is because as put in the question, the charges are equivalent. As you can see, +2 and -2 equal each other out.

Note: S has a charge of -2, not +2. (Look at oxidation rules.)

7 0
4 years ago
The maximum water vapor that air can hold at 30°C is about 30 grams/cubic meter. If the humidity of the air is currently 6 grams
elena-s [515]
The answer is 16 due to the 30 grams cubic meter and the humidity has to be added
4 0
3 years ago
Read 2 more answers
Other questions:
  • Atoms bond to other atoms through their electrons. The following analogy will be used to help us understand how this occurs. Ima
    9·1 answer
  • List two general properties of molecular compounds
    6·1 answer
  • Acid rain includes HNO3 and what other chemical?
    13·2 answers
  • As the temperature of a liquid increases, its viscosity _____. increases stays the same decreases
    7·2 answers
  • Organic compounds ALL contain the element carbon. Which organic compound, used for stored chemical energy, contains carbon, hydr
    8·1 answer
  • Janice ran a 5 km race on Saturday at 0.75 h. What was her speed?<br><br><br> HELP MEHHH NOWWWW
    10·2 answers
  • (3.88 x 10to the 26th)atoms of copper would be equal to how many moles of copper?
    14·1 answer
  • Which list only includes terms that describe oxygen gas, Oz? (1 point)
    14·1 answer
  • Write the step by step process of digestion in ruminants using 4 square method.
    15·1 answer
  • The chemical formula for a emerald is BeAl2(SiO3)6.<br> An emerald can be described as
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!