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
givi [52]
3 years ago
15

Lous

Chemistry
1 answer:
ratelena [41]3 years ago
6 0

Answer:

In the last chapter we looked at the particle model of matter and specifically at changes of state. Do you remember heating and cooling candle wax to observe it melt and then solidify. The wax first changed from a solid into a liquid and then back to a solid again. These are physical changes. The chemical properties of the substance does not change.

We are now going to look at what happens when we get chemical changes in substances. These take place during chemical reactions.

You might be interested in
In which substance does clorine have an oxidation number of +5?​
Oksi-84 [34.3K]

Answer:oxidation number H = +1

oxidation number O = -2

let x = oxidation number Cl

in HClO3

+1 + x -6 =0

x = +5

Explanation:

3 0
4 years ago
One third of the united states carbon consumption is used to operate what
RideAnS [48]

Answer:

Cars and factories

Explanation:

6 0
3 years ago
Read 2 more answers
Also need help with this question .. ik I’m asking a lot, I’m very confused
andreyandreev [35.5K]

Answer:

see the pic for the answer

7 0
4 years ago
The hormone, thyroxine is secreted by the thyroid gland, and has the formula: c15h17no4i4. How many milligrams of iodine can be
Mandarinka [93]

Answer:

9.73 grams of iodine

Explanation:

First we calculate the molar mass of the tyroxine C₁₅H₁₇NO₄I₄:

M = 15 × 12 + 17 × 1 + 1 × 14 + 4 × 16 + 4 × 127 = 783 g/mole

The taking in account that 1 mole of tyroxine have 4 moles of iodine atoms (508 g) we devise the following reasoning:

if from   783 g of tyroxine we can extract 508 g of iodine

the from  15 g of tyroxine we can extract X g of iodine

X = (15 × 508) / 783 = 9.73 grams of iodine

4 0
4 years ago
When hydrogen is burned as a fuel, the primary waste product produced is ________?
lora16 [44]
2H2 +O2 ----> H2O
The primary product is water.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which one of the following formulas represents an aldehyde?
    5·2 answers
  • Glenn is heating water in a teakettle. The hotter water at the bottom of the kettle rises. The cooler water near the top sinks a
    14·2 answers
  • Write a balanced nuclear equation for the formation of 28 Si 14 from beta-minus emission.
    15·1 answer
  • If the molarity of sugar is 1.1, what will the freezing point be?
    7·1 answer
  • A chemistry graduate student is given of a chlorous acid solution. Chlorous acid is a weak acid with . What mass of should the s
    14·1 answer
  • What is the correct ionic formula when mg2+ and p3− react?
    13·2 answers
  • Why would the white blood cells have an abundance of lysosomes?
    5·2 answers
  • 10 points help plz......
    8·1 answer
  • Please help me with this
    14·1 answer
  • Which one of the following is not a redox reaction?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!