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
Blababa [14]
3 years ago
5

Pls help ASAPPPP!! BRAINLIEST

Chemistry
1 answer:
VLD [36.1K]3 years ago
7 0

Answer:

a

Explanation:

first one i did the test trust me

You might be interested in
A student added 5 grams of calcium chloride, a white solid substance, to 15 grams of water at 220 C. Several observations were m
umka21 [38]

Answer:

D

Explanation:

A The calcium chloride dissolves in solution

B The mass of the solution totals 20 g

C The temperature of the solution is 35 degrees

D The solution became lighter in color

The correct answer would be that <u>the solution became lighter in color.</u>

An increase in temperature can also be considered a sign of a chemical reaction but in this case, the dissolution of calcium chloride in water is in itself exothermic.

A change in the mass of the final solution could also be considered a sign of a chemical reaction but in this case, the total mass equals the addition of the individual masses of the reactant.

The dissolution of calcium chloride in water is not enough as evidence of a chemical reaction. Dissolution can be a physical change of which, the evaporation of the water would retrieve the solute.

<em>A change in color, however, is one of the evidence to establish that a chemical reaction has occurred.</em>

The correct option is D.

4 0
3 years ago
Is the following equation balanced? Zn + 2HCl → ZnCl₂ + H₂
lutik1710 [3]

Answer:

Yes it's balanced

Explanation:

on the left side, it contains

1 zn and 2 hydrogen and 2 chlorine

while on the right side it contains

1 zn 2 chlorine and 2 hydrogen

7 0
3 years ago
This article is available at 5 reading levels at https://newsela.com.
kompoz [17]

Answer:

c

Explanation:

8 0
3 years ago
Ca+P criss cross method
pochemuha

Answer:

t \o \: know \: the \: answer \:

refer \: to \: the \: attatchment

Explanation:

<h3>Hope this helps !! </h3>

4 0
3 years ago
The atmospheric pressure in Francisco on ascertain day was 97.6kpa what was the pressure on mmhg
vodka [1.7K]

Answer:

732.0601 mmHg

Explanation:

Given data:

Pressure = 97.6 KPa

Given pressure in mmHg = ?

Solution:

Kilo pascal and millimeter mercury both are units of pressure.

Kilo pascal is denoted as "KPa"

Millimeter mercury is denoted as " mmHg"

Kilo pascal is measure of force per unit area while also define as newton per meter square.

It is manometric unit of pressure. It is the pressure generated by column of mercury one millimeter high.

Conversation of kilopascal to mmHg:

97.6 × 7.501 = 732.0601 mmHg

3 0
3 years ago
Other questions:
  • PLZ HELP ASAP PLATO!!! BRAINLIEST TO WHOEVER ANSWERS CORRECTLY!!!
    9·1 answer
  • Is cereal soup? and Is an hot dog a sandwich?...
    14·1 answer
  • Will mark brainliest 35 pts
    15·1 answer
  • The phenomenon where a protein is more soluble when going from low salt concentration to medium salt is called ____salting in___
    12·1 answer
  • Given: g on moon = –1.63 meters/second2
    6·1 answer
  • Use the following terms to fill in the blanks:
    9·1 answer
  • Geologists can use a radioactive isotope's to help determine the age of some rocks. A. half-life B. growth rate C. double-life D
    15·1 answer
  • Does this equation obey the law of conservation of mass: 2Z + 2HCI ➡️ ZnCI2 + H2​
    11·1 answer
  • Consider the balanced chemical equation . How many moles of H 2O are produced when 1.0 mole of C 2H 6 reacts with excess O 2
    15·1 answer
  • HELP PLEASE IM GIVING BRAINLISTAs the amount of salt in water increases, the___________ of the water increases.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!