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
gtnhenbr [62]
3 years ago
8

When an athlete gets hurt they apply sometimes an instant cold pack to the injury. the instant cold pack works by mixing two che

micals that create a chemical reaction. what evidence is there that a chemical reaction is taking place in the cold pack?
a. change in odor
b. change in color
c. formation of gas
d. temperature change
Chemistry
2 answers:
siniylev [52]3 years ago
8 0
The answer would be D
trasher [3.6K]3 years ago
4 0

yes of course the answer is D, temperature change.

You might be interested in
What mass of aluminum chloride could be made from 8.1 g of aluminum and 4.2 L of chlorine at STP?
posledela
In this problem Al metal is a limiting reactant as it is present in less amount as compared to chlorine gas, Hence, controls the formation of ALCl3. So, the amount of AlCl3 produced is 40.05 grams. Solution is as follow,

3 0
4 years ago
Based on the information in the table, which of the following arranges the bonds in order of decreasing
tatuchka [14]

Answer:

what grade so i can help

Explanation:

3 0
3 years ago
Read 2 more answers
Place the following covalent bonds in order from least to most polar: a. H-Cl b. H-Br c. H-S d. H-C
timofeeve [1]

Answer:


The Order is as follow,

                                     C-H < S-H < H-Br < H-Cl


Explanation:

                      Polarity depends on the electronegativity difference between two atoms, greater the electronegativity difference, greater will be the polarity of bond and vice versa.


Electronegativity Difference between Hydrogen and other given elements are as follow,


1) C-H;

               E.N of Carbon     = 2.55

               E.N of Hydrogen = 2.20

                                           ------------

               Difference              0.35


2) S-H;

               E.N of Sulfur       = 2.58

               E.N of Hydrogen = 2.20

                                           ------------

               Difference               0.38


3) H-Br;

               E.N of Bromine   = 2.96

               E.N of Hydrogen = 2.20

                                          -------------

               Difference              0.76


4) H-Cl;

               E.N of Chlorine   = 3.16

               E.N of Hydrogen = 2.20

                                           -----------

               Difference               0.96


Hence it is proved that the greatest electronegativity difference is found between H and Chlorine in H-Cl, therefore it is highly polar bond and vice versa.

7 0
3 years ago
A carbon atom with 6 protons, 6 electrons, and 6 neutrons would have a mass number of
Nata [24]
12, electrons dont have mass. only protons and neutrons do
7 0
3 years ago
This diagram shows a marble with a mass of 3.8 grams (g) that was placed into 10 milliliters (mL) of water.
ryzh [129]

Complete Question:

This diagram shows a marble with a mass of 3.8 grams (g) that was placed into 10 milliliters (mL) of water. Using the formula V M D = , what is the density of the marble?

(See attachment for full diagram)

Answer:

1.27 g/cm³

Explanation:

First, find the volume of rock:

Volume of rock = volume of water after rock was placed - volume of water before rock was placed

Volume of rock = 13 - 10 = 3ml

Density of rock = grams of rock per 1 cm³

Note: 1 ml = 1 cm³

Let x represent amount of rock per 1 cm³

Thus,

3.8g = 3 cm³

x = 1 cm³

Cross multiply

1*3.8 = 3*x

3.8 = 3x

3.8/3 = 3x/3

1.27 = x

Density of rock = 1.27 g/cm³

3 0
3 years ago
Other questions:
  • Which choice can be a solid, liquid, or a gas?
    11·1 answer
  • Acid formulas can be distinguished from base formulas because acid formulas usually and base formulas .
    9·1 answer
  • Three apprentice tailors (X, Y, and Z) are assigned the task of measuring the seam of a pair of trousers. Each one makes three m
    11·1 answer
  • A bird could be both a consumer and a producer
    6·1 answer
  • Determine what ions are present when the following dissociates or ionizes in water. Include states of matter.
    10·1 answer
  • A mixture of 0.307 M Cl 2 , 0.465 M F 2 , and 0.706 M ClF is enclosed in a vessel and heated to 2500 K . Cl 2 ( g ) + F 2 ( g )
    14·1 answer
  • At 79.0°C, the volume of a gas is 49.0 L. If the pressure remains constant, at what
    11·1 answer
  • Can someone help me??
    12·2 answers
  • Which statements accurately describe volume? Check all that apply. Volume is a physical property of an object. Volume is measure
    12·1 answer
  • Calculate the molecular mass of Co(NO3)2<br>with steps please
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!