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
scoundrel [369]
3 years ago
9

Can someone do this for me i wasent there when we learned it

Chemistry
1 answer:
jonny [76]3 years ago
8 0
These are the first two

You might be interested in
Please help on question 7 and 8<br>​
lesantik [10]

Answer:

7. 5km/h

8. 10km/h

I just need to add characters so i can post

3 0
3 years ago
The valency of calcium is2 ? what does it mean​
nalin [4]

Answer:

hope you like it

Explanation:

because ouytermost shell contains two electrons

calcium is in group 2 so its valency is two valency is the number of outer shelll electrons it needs to have an stable outer shell . it needs 2 more .

5 0
3 years ago
Are these mixtures or pure substance?
Archy [21]
A mixture is a system that is made up of two or more substances which are not combined chemically. A pure substance is a system that only has one substance. The following are classified as:
1.water : pure substance
<span>2.blood : mixture</span>
<span>3.the oceans : mixture</span>
<span>4.iron : pure substance
5.brass : mixture</span>
<span>6.uranium : pure substance</span>
<span>7.wine : mixture</span>
<span>8.leather : mixture</span>
<span>9.table salt (NaCl) : pure substance</span>
4 0
3 years ago
what is the percent by mass of NaHCO3 in a solution containing 20.0 g of NaHCO3 dissolved in 600.0 ml of water
Ne4ueva [31]
%(NaHCO3)= ((mass NaHCO3)/(mass NaHCO3 + mass water))*100%

m=Volume*Density
Density of water =1 g/ml
m(water) = Volume(water)*Density(water) = 600.0 ml * 1g/ml=600g water

%(NaHCO3)= ((20.0 g)/(20.0 g + 600 g))*100%=0.0323*100%=32.3%
7 0
3 years ago
Find the mass of 1 atom of Chlorine in gram.
vazorg [7]
B. 35.45 ! Hope this helps
6 0
3 years ago
Other questions:
  • Drag and drop the gases in the atmosphere to order them from most abundant to least abundant.
    13·2 answers
  • What ia 45.76×0.25 please help
    11·2 answers
  • How much potassium chlorate is needed to produce 20.0 mL<br> ofoxygen gas at 670 mm Hg and 293 K?
    8·1 answer
  • A 1 liter solution contains 0.443 M acetic acid and 0.332 M sodium acetate. Addition of 0.365 moles of perchloric acid will: (As
    7·1 answer
  • 7. What do you use to hold a test tube when you are heating it?​
    14·2 answers
  • In any food web, the organisms that are responsible for converting raw energy into usable chemical energy are collectively calle
    9·2 answers
  • How many formula units are in 3.25 moles of silver nitrate
    11·2 answers
  • A 0.0200 M NaCl solution was formed when 38.0 grams of NaCl was dissolved in
    13·1 answer
  • Identify the type of wave that would be located at Point A below.​
    5·1 answer
  • What happens when the two atoms are fairly close?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!