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
mr Goodwill [35]
3 years ago
8

What are some of thr similarties of physical changes and chemical changes?

Chemistry
1 answer:
Marysya12 [62]3 years ago
5 0
The similarities of physical and chemical changes is that both of those changes change the way the object looks by it's physical appearance. Also they use a type of element to change that object.
You might be interested in
Water is a polar molecule, meaning the electrons that are shared between the atoms aren't shared equally so oxygen attracts more
amm1812

Answer:

Magnet with a positive and a negative pole

Explanation:

A great analogy to demonstrate what a polar molecule looks like is to imagine a magnet. A magnet has one positively charged end and one negatively charged end, two poles, that is.

Imagine that we have a magnet of a shape of a prism (water molecule has a bent shape). The two base vertices of the face of the triangle are positively charged, that's because hydrogen is less electronegative than oxygen and, hence, the two hydrogen atoms are partially positively charged in a water molecule.

Oxygen is more electronegative than hydrogen meaning it has a greater electron-withdrawing force, so electrons are closer to oxygen within the O-H bonds. Oxygen, as a result, becomes partially negatively charged, so it's our negative pole of the magnet.

4 0
3 years ago
A student needs to prepare 100. mL of 0.612 M Cu(NO3)2 solution. What mass, in grams, of copper(II) nitrate should the student u
Temka [501]

Answer: 11.5 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution

Molarity=\frac{n\times 1000}{V_s}

where,

Morality = 0.612 M

n= moles of solute  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

0.612=\frac{n\times 1000}{100ml}

n=0.0612moles

Mass={\text {moles of solute }}{\times {\text {molar mass}}=0.0612moles\times 187.56g/mol=11.5g

Therefore, the mass of copper (II)nitrate required is 11.5 grams

3 0
3 years ago
Based on the information in the graph, what is the relationship between air temperature and the amount of water vapor that the a
NeTakaya

Answer:

1 i think

Explanation:

5 0
3 years ago
Calculate the volume of each of the following gases at STP
kherson [118]
For Ar :

1 mol ------------ 22.4 L ( at STP )
7.6 mol ---------- x L 

x = 7.6 * 22.4

x = 170.24 L
-----------------------------------------------------------------
For C2H3:

1 mol ------------ 22.4 ( at STP)
0.44 mol --------- y L

y = 0.44 * 22.4

y = 9.856 L

hope this helps !.



7 0
3 years ago
Mohr's salt is a pale green crystalline solid which is soluble in water. It is a 'double sulfate' which contains two cations, on
Veronika [31]
The gas is NH₃.
H₂ doesn't dissolve readily in water, SO₂ gives an acidic solution in water.

The solid residue is Fe(OH)₂.
FeSO₄ and Na₂SO₄ are soluble in water.

The answer is C.
3 0
3 years ago
Other questions:
  • Which species is the reducing agent in the reaction: 3ca (s) + 2cr3+ (aq) 2cr (s) + 3ca2+ (aq)?
    13·1 answer
  • The unit "troy ounce" is often used for precious metals such as gold (Au) and platinum (Pt) (1 troy ounce= 31.103 g). (a) A gold
    14·1 answer
  • Carbon forms two oxides in which the weight of oxygen combines with 1 g of carbon
    10·1 answer
  • The reaction 4al(s) + 3o2(g) --> 2al2o3(s) ?h = -3351 kj is _____, and therefore heat is _____ by the reaction
    11·1 answer
  • (50 POINTS!)
    10·2 answers
  • 2. Put the following steps of scientific inquiry in order, please number 1‐3.
    15·1 answer
  • Heeeelp its due TODDAYYYY PLZZZ ASAP :)
    8·1 answer
  • If 250. ML of water are poured into the measuring cup, the volume reading is 8.45 oz . This indicates that 250. ML and 8.45 oz a
    14·1 answer
  • g 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid sodium azide (NaN3) in
    6·1 answer
  • The disinfectant phenol, C₆H₅OH, has a pKa of 10.0 inwater, but 14.4 in methanol.(a) Why are the values different?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!