subject

Chemistry, 16.12.2020 19:10 brianmondesir1owahud

A student applies heat to a solid substance. Which indicates that a chemical change occurred? A. The substance becomes a liquid but solidifies when cooled.
B. The substance changes color and stays that color when cooled.
C. The substance goes from a liquid to a gas very quickly.
D. The substance expands but stays the same color.

ansver

Answers: 2

Show answers

Another question on Chemistry

question

Chemistry, 22.06.2019 02:30

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Answers: 2

question

Chemistry, 22.06.2019 09:30

What is the mass of 0.46 mol of mgcl2

Answers: 3

question

Chemistry, 22.06.2019 12:00

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Answers: 1

question

Chemistry, 22.06.2019 19:30

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

Answers: 1

You know the right answer?

A student applies heat to a solid substance. Which indicates that a chemical change occurred? A. Th...

Questions

question

Physics, 05.07.2019 01:20

The average speed of a nitrogen molecule in air is about 6.70 ✕ 102 m/s, and its mass is about 4.68 ✕ 10-26 kg. (a) if it takes 4.50 ✕ 10-13 s for a n...

question

Physics, 05.07.2019 01:20

Given (1/2) |ej> + (v3/2) |e2> , |ej> and |e2> are solutions of a hamiltonian, h, which is not the hamiltonian of a harmonic oscillator...

question

Physics, 05.07.2019 01:20

(a) for the case of two qubits, briefly explain the main difference between product states and entangled states. provide one example of each. (b) show...

question

Physics, 05.07.2019 01:20

Liam is interested in determining the maximum profit possible for the mums. find the maximum profit corresponding to the most profitable price point....

question

Physics, 05.07.2019 01:20

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 120 m at a speed of 1...

question

Physics, 05.07.2019 01:20

If we assume that the solar nebula (the prot oplanetary disk that formed our solar system) is optically thin and only heated via solar radiation, then...

question

Mathematics, 05.07.2019 01:20

i'm struggling with this question, any /explanation would be appreciated translate both the premise and the conclusion of this argument into sta...

question

Physics, 05.07.2019 01:20

How is charge separation achieved in crystalline silicon, amorphous silicon and polymer solar cell....

question

Mathematics, 05.07.2019 01:20

The department of foreign languages of a liberal arts college conducted a survey of its recent graduates to determine the foreign language courses the...

question

Mathematics, 05.07.2019 01:20

Abusinessman borrowed p3,000,000 with interest at the rate of 6% compounded annually. he agrees to discharge his obligations by paying a series of 6 a...

question

Mathematics, 05.07.2019 01:20

From a shipment of 65 transistors, 6 of which are defective, a sample of 5 transistors is selected at random. (a) in how many different ways can...

question

Physics, 05.07.2019 01:20

A) why is the following inverse b decay forbidden for a free proton? p net+v b) why is the same reaction sometimes possible if the proton is bound in...

question

Mathematics, 05.07.2019 01:20

3. let a = -z as follows: for all sets x in p(a), {1,2,3,4,5} and define s: (a) if x has an even number of elements 1 s(x) if x has an odd number of...

question

Mathematics, 05.07.2019 01:20

the accompanying data were compiled by the admissions office of a certain college during the past 5 years. the data relate the number of college broch...

question

Mathematics, 05.07.2019 01:20

In a survey conducted by helena, a financial consultant, it was revealed of her 426 clients 288 own stocks. 200 own bonds. 184 own m...

question

Mathematics, 05.07.2019 01:20

Use the definition of the laplace transform l{f(t)} = sie st f(t)dt to compute the following laplace transform. lfe) 1 t-3 1 3s 1 8-3 use the d...

question

Mathematics, 05.07.2019 01:20

30. suppose that the temperature at any point of a steel plate is given by (4,3), t 500-0.6x-1.5y, where x and y are measured in meters. at the point...

question

Mathematics, 05.07.2019 01:20

F(x, y)= k, k0, 1,2,3 3. let f(,y)= x - y. draw the level curves exists. if it exists, find its value. 4. determine whether or not lim ,0) + y...

question

Mathematics, 05.07.2019 01:20

Alexa pays 7/20 of a dollar for each minute she uses her pay-as-you-go phone for a call, and 2/5 of a dollar for each minute of data she uses. this mo...

question

English, 05.07.2019 01:20

Is the education system exploiting kids’ minds?...

More questions: Chemistry Another questions

Questions on the website: 13722367