Salt & sugar do not appear to have a fix shape.why do we call them solid

Answers

Answer 1

Answer: they do have a fixed shaed because they are crystals. theye are very very tiny, but salt is crystals in the shape of cubes, and sugar has completely irregular crystals. salt can be mined for example - rocks of pure salt are solid, no? :)

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The term accuracy best refers to which of following

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the extent to which a given measurement agrees with the standard value for that measurement

Which question would most likely be studied by a physicist?A. Were there ever any living organisms on Mars?
B. How can the forces on a space probe be controlled so it will land
on Mars?
O C. What type of substances make up the soil on Mars?
O D. Should the government spend taxpayers' money to send space
probes to Mars?

Answers

Answer:A

Explanation: Were there any living organisms is the answer because physics is the study of matter,its motion and behaviour of space and time and some other topics like energy and force.

Answer:

Explanation:

Forces and vectors on a probe are a physics thing

Which of the following pairs of items will be attracted by one another?A. A positively charged pith ball and a negatively charged glass rod
B. Two positively charged pith balls
C. A negatively charged pith ball and a negatively charged glass rod
D. Two negatively charged pith balls

Answers

Answer : Option A) A positively charged pith ball and a negatively charged glass rod

Explanation : The pair of items that will be attracted by one another is a positively charges pith ball and a negatively charged glass rod.

According to the charge interactions rule, it is state that opposite charges always attract each other and like charges repel each other.

When opposite charges come near to each other there is a pull generated to get attracted, like a north and south pole of a magnets.

whereas when like charges are brought together they try to push each other in opposite direction, like north-north pole of magnets or south-south pole of magnets.

In the given example the pith ball is having positive charge which when brought near the negatively charged glass rod gets attracted.

A. Is the correct answer
Opposites attract

If 20.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 37.5 mL of 0.124 M HCl, what is the concentration of the Ca(OH)2 solution? Show all of the work needed to solve this problem. Ca(OH)2 + 2 HCl yields 2 H2 O + CaCl2

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You first need to write the balanced chemical reaction for what is going on.
Ca(OH)₂+2HCl→2H₂O+CaCl₂

After you make the balanced chemical reaction, First you find the moles of HCl used. To do this multiply 0.0375L by 0.124M to get 0.00465mol HCl. Then you multiply 0.00465mol HCl by (1mol Ca(OH)₂)/(2mol HCl) to get 0.002325mol Ca(OH)₂. Finally to find concentration of Ca(OH)₂ used you divide 0.002325mol by 0.020L to get 0.116M Ca(OH)₂.
Therefore the concentration of the unknown solution of Ca(OH)₂ was 0.116M.

I hope this helps. Let me know if anything is unclear.

What can be said about the mass of a system when a change of state occurs? A) The mass of the system always increases during a change of state. B) The mass of the system always decreases during a change of state. C) The mass of the system remains constant during a change of state. D) The mass of the system varies depending on the type of change of state.

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Answer:

C) The mass of the system remains constant during a change of state.

Explanation:

During a change of state (such as melting, boiling, or condensation), the mass of a closed system remains constant. This principle is based on the law of conservation of mass, which states that mass cannot be created or destroyed; it can only change forms or be transferred between components of the system

A sample of an unknown substance has a mass of 89.5 g. If 345.2 J of heat are required to heat the substance from 285 K to 305 K, what is the specific heat of the substance?

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The specific heat of the unknown sample has been $\rm \bold{0.192\;\;J/g^\circ C}$ .

Specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The specific heat (c) for a substance can be given by:

$Q=mc\Delta T$ ......(i)

Where, the heat required by the substance, $Q=345.2\;\text J$

The mass of the substance has been, $m=89.5\;\text g$

The change in temperature of the system has been, $\Delta T$

The change in temperature has been given as:

$\Delta T=T_f-T_i$

The initial temperature of the substance, $T_i=285\;\text K$

The final temperature of the substance, $T_f=305\;\text K$

Substituting the values for the change in temperature, $\Delta T$ :

$\Delta T=305\;-\;285\;K\n\Delta T=20\;\text K$

Substituting the values in equation (i):

$345.2=89.5\;*\;c\;*\;20\n345.2=1,790c\nc=0.192\rm \;J/g^\circ C$

The specific heat of the unknown sample has been $\rm \bold{0.192\;\;J/g^\circ C}$ .

For more information about specific heat, refer to the link:

brainly.com/question/2094845

The specific heat is the heat needed per unit mass to raise the temperature by 1 degree celsius. So the specific heat = heat/(mass*ΔT) = 345.2/[89.5*(305-285)]=0.193 J/(g*℃). When using ΔT, the unit K and ℃ are the same.

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Consider the equation: 2NO2= N2O4. Using ONLY the information given by the equation which of the following changes would increase the molar concentration at equilibrium of the product N2O4?

Which one of the following groups of chemical compounds is composed entirely of organic compounds?A. C2H4O, CH2O, CaSO4, C3H5(OH)3B. C2H2, CH4, CaCl2, CaCN2C. Ch3OCH3, Ca3(PO4)2, CO2, H2CO3D. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3

How many moles of oxygen atoms are present in 5 moles of Mg3(PO4)2

Select all that apply. Organic compounds must contain: hydrogen carbon oxygen nitrogen