All categories

2 years ago

Which of the following is an example of a chemical change?

Physics

2 answers:

bija089 [108]2 years ago

5 0

HELLO THERE

THE ANSWER IS

D. A gas when vinegar and baking soda are mixed

EXTRA INFO: An exmaple of phyical change is sawing a piece of wood

BEST REGARDS QUEEN Z

HOPE THIS HELPS

Orlov [11]2 years ago

3 0

A is wrong because something getting heated does not mean a chemical change.

B is wrong because its physical

C is wrong because its physical

D is correct because there is a new product.

btw the chemical formula for vinegar and baking soda is this I think:

CH3COOH + NaHCO3 ⇒ CH3COONa + CO2 + H2O.

You might be interested in

the density of a steel is 7.8.find the mass of steel cube of side 10 cm. find volume of steel if the mass is 8kg

lukranit [14]

Answer:

Mass of the steel cube = 7800 kg

Volume of the steel = 1.025 cubic centimetre

Explanation:

Given:

The density of the steel = 7.8

Side of the cube = 12 cm

(1)The mass of steel cube :

We know that,

$Density = \frac{Mass}{Volume}$

We are given with density and sides of the cube

then volume of the cube

= $(side)^3$

= $10^3$

= 1000 cubic centimetre

Now

$7.8 = \frac{mass}{1000}$

$mass = 7.8 \times 1000$

mass = 7800 kg

(2)volume of steel:

Given the mass = 8 kg

$Density = \frac{Mass}{Volume}$

Substituting the values

$7.8 = \frac{8}{volume}$

$volume = \frac{8}{7.8}$

volume = 1.025 cubic centimetre

3 0

2 years ago

What do you think happens to the temperature when water changes to gas?

Olenka [21]

Answer:

it gets hot and more hot until it turns to gas

Explanation:

5 0

2 years ago

Starting from rest, a 2.1x10^-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exert

Rainbow [258]

Answer:

a) The flea's speed when it leaves the ground is $v=1.88m/s$

b) The flea move $18cm$ upward while it is pushing off

Explanation:

Knwons

Mass $m=2.1\times 10^{-4} kg$ , Work $W=3.7\times 10^{-4} J$ and Force $F=0.41N$

a) Here we are going to use $W=\frac{1}{2} mv^{2}$ , so $v=\sqrt{\frac{2W}{m} }= \sqrt{\frac{2(3.7\times 10^{-4} J)}{2.1\times 10^{-4} kg} }=1.88m/s$

a) Here we are going to use $W=mgh$ , so $h=\frac{W}{mg}= \frac{3.7\times 10^{-4} J}{(2.1\times 10^{-4} kg)(9.8m/s^{2})} =0,1797m$ or $18cm$ approx.

7 0

2 years ago

What would be the result of an alpha particle coming into a magnetic field?

Aneli [31]

The right answer for the question that is being asked and shown above is that: "C) The alpha particle will be deflected in a curve path. " the result of an alpha particle coming into a magnetic field is that C) The alpha particle will be deflected in a curve path.

8 0

2 years ago

Read 2 more answers

What is the electron configuration of oxygen? 1s22s22p3 1s2, 2s6, 2p4, 3s2 1s2, 2s2, 2p4, 3s2 1s22s22p4

vaieri [72.5K]

oxygen's atomic number is 8

1s22s22p4 is the electron configuration

2+2=4 4+4=8

7 0

3 years ago

Read 2 more answers