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
Assoli18 [71]
3 years ago
9

Help!! please!! 30 points and i will give brainliest!

Chemistry
2 answers:
xz_007 [3.2K]3 years ago
7 0

Answer:

CaCl2

The charge can be +3 or +2

Explanation:

It takes two atoms of chloride and 1 atom of calcium to make this compound

Levart [38]3 years ago
3 0

Answer: chemical formula is CaCl2.

CaCl2------> Ca^2+ + Cl^-1

Explanation:

+2 for calcium ion and -1 for the chlorine ion.

For K2Cr2O7

The oxidation state of chromium=

(+1×2) + 2x + (-2×7) = 0

+2+2x-14= 0

2x= 12

x= 12/2

x=+6.

Therefore, the oxidation number of Chromium, Cr in K2CrO7 is +6

You might be interested in
6. India is a country connected to the continent of Asia. India used to be far apart
velikii [3]
I can’t see what image you have to refer too but India is now part of the rest of Asia due to continental plates running into eachother.
4 0
3 years ago
What are atoms?
liq [111]

Answer:

4. particles of matter

8 0
3 years ago
Read 2 more answers
Therefore, the independent variable was<br> and the dependent<br> variable was
den301095 [7]

Answer:

The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.

5 0
3 years ago
Read 2 more answers
What unit is mass generally measured in
Veronika [31]

Answer:

kilograms

Explanation:

hope this helps, pls mark brainliest :D

6 0
3 years ago
Read 2 more answers
A sample of hydrogen occupies a volume of 351 mL at a temperature of 20 degrees Celsius. What is the new volume if the temperatu
xeze [42]
Volume of Hydrogen V1 = 351mL 
Temperature T1 = 20 = 20 + 273 = 293 K 
Temperature T2 = 38 = 38 + 273 = 311 K 
We have V1 x T2 = V2 x T1 
So V2 = (V1 x T2) / T1 = (351 x 311) / 293 = 372.56 
Volume at 38 C = 373 ml
6 0
3 years ago
Other questions:
  • Magnesium hydroxide is used as an antacid in milk of magnesia and reacts with hydrogen chlrode in the stomach to form water and
    9·1 answer
  • How many moles of carbon (C) atoms are equivalent to 38.1 g C?
    12·1 answer
  • If a student did not remove all of the bubbles from inside the buret before reading the initial volume and beginning the titrati
    6·1 answer
  • Which of the following atoms have the same number of neutrons as an atom of Aluminum-27?
    5·2 answers
  • The only positive ion found in H2SO4(aq) is the
    7·1 answer
  • Which activity involves a product made from petroleum jelly a.) eating fresh fruit for a snack b.) walking to school c.) see you
    15·1 answer
  • Match each set of quantum numbers to the correct subshell description by typing in the correct number.
    5·2 answers
  • Question 4 of 20
    11·1 answer
  • Read this excerpt from Emerson’s essay “Self-Reliance” and decide whether it is biased. Explain your answer as well as what you
    8·1 answer
  • What happens to most of the energy as it moves throughout a food web?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!