7. You found that 1.50 ml of a liquid has mass of 2.750g. What is the density of the unknown liquid?

Answers

Answer 1

Answer: To find density, you just divide the mass by the volume (density is the measurement of the amount of mass in a certain volume):

$density=(mass)/(volume)=(2.750\ g)/(1.50\ mL)=1.833\ g/mL$

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What is the complete ionic equation for this reaction?2KOH(aq) + H2SO4(aq) → 2H20(1) + K2SO4(aq)O A. 2K+ + OH + H2SO4 → OH + 2H+ + K2SO4B. OH + 2H+ + 2H20()C. 2KOH + H2SO4 → 2H20 + K2SO4D. 2K+ + OH + 2H+ + SO42- → 2H20() + 2K+ + SO42-SUBMIT
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Waves move fastest in low-temperature gases. low-temperature solids. high-temperature gases. high-temperature solids.

What is the result of multiplying (2.5 × 1010) × (3.5 × 10-7)?

Answers

The result of multiplying that equation is 70,700.

Which compound is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?

Answers

STP means standard temperature and pressure at 0°C (273K) and 1 atm (atmosphere). The density of the unknown gas is 0.63 gram per liter. The deal gas equation is PV = nRT. The n is the numer of moles and can be represented as mass of the gas, m, divided by the molar mass, c. so we have,

PV = nRT

PV = (m/c)RT

Since the density is d = m/V

Pc = (m/V)RT

Pc = dRT

c = drT/P

substitute the values into the equation,

c = [(0.63g/L)(0.08206 L-atm/mol-K)(273K)]/(1atm)

c = 14.11 g/mol

Will a precipitate form when NaCl(aq) and AgNO3 (aq) are mixed together?

Answers

yes,because they are both soluble salts so they form an insoluble salt which will be the precipitate formed

Which formula represents an unsaturatedorganic compound?
(1) CH4 (3) C3H8
(2) C2H4 (4) C4H10

Answers

Answer: (2) $C_2H_4$

Explanation: Unsaturated organic compounds are those compounds which contains carbon-carbon double or triple bond.

Saturated organic compounds are those compounds which contains carbon-carbon single bond.

$CH_4$ , $C_3H_8$ and $C_4H_10$ are all alkanes having general formula $C_nH_(2n+2)$ containing single bonds.

$C_2H_4$ is an alkene having general formula $C_nH_(2n)$ containing double bonds.

The only saturated hydrocarbons are Alkanes: $C_(n) H_(2n+2)$

From that we can see that:
CH4, C3H8 and C4H10 are saturated.

Therefore:
C2H4 is unsaturated. Answer is (2).

What are the thin fibers of the human nervous system that send messages between different parts of the body?A.
nerves

B.
brain

C.
spinal cord

D.
eye

Answers

Answer:

The correct answer is option A, that is, nerves.

Explanation:

The nerves are also known as neurons that make up the nervous system. The nerves are considered as the unique cells, which conduct messages from one section of the body to another, as minute electrical signals. These messages are also called nerve impulses. There are three distinct kinds of neurons known, and each one exhibit a somewhat different function. These are relay neurons, sensory neurons, and motor neurons.

A. Nerves, it's literally the only one that makes sense

List 5 physical properties of matter. How many atoms of each type of element in C6H12O6?

Answers

Physical properties= Color, density, volume, mass, melting point and boiling point

Atoms of each type- C 6, H 12, O 6, total of 24 atoms in one molecule

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