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
Bumek [7]
3 years ago
5

You make the following measurements of an object – 22 kg and 42 m3. What would the object’s density be? Show your work for credi

t and include final units.
Chemistry
2 answers:
Dafna11 [192]3 years ago
4 0
Density = mass / volume
therefore, density = 22/42 = 0.524 kg/m3
Nat2105 [25]3 years ago
4 0

Answer: 0.52kgm^{-3}

Explanation:

Density is defined as the mass contained per unit volume.

Density=\frac{mass}{volume}

We are given : Mass of an object = 22 kg

Volume of an object = 42m^3

Putting in the values in the formula for density:

Density=\frac{22kg}{42m^3}=0.52kgm^{-3}

Thus the mass has density of 0.52kgm^{-3} in S.I units.

You might be interested in
Describe what happens to the electrons when sodium and chlorine combine to make NaCl.
kiruha [24]
When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable. The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat energy.
4 0
2 years ago
Suppose a substance has a heat of fusion equal to 45 calg and a specific heat of 0.75
Varvara68 [4.7K]

Answer:

The substance will be in liquid state at a temperature of 97.3 °C

Note: The question is incomplete. The complete question is given below :

Suppose a substance has a heat of fusion equal to 45 cal/g and a specific heat of 0.75 cal/g°C in the liquid state. If 5.0 kcal of heat are applied to a 50 g sample of the substance at a temperature of 24°C, what will its new temperate be? What state will the sample be in? (melting point of the substance = 27°C; specific heat of the solid =0.48 cal/g°C; boiling point of the substance = 700°C)

Explanation:

1.a) Heat energy required to raise the temperature of the substance to its melting point, H = mcΔT

Mass of solid sample = 50 g; specific heat of solid = 0.75 cal/g; ΔT = 27 - 24 = 3 °C

H = 50 × 0.75 × 3 = 112.5 calories

b) Heat energy required to convert the solid to liquid at its melting point at 27°C, H = m×l, where l = 45 cal/g

H = 50 × 45 = 2250 cal

c) Total energy used so far = 112.5 cal + 2250 cal = 2362.5 calories.

Amount of energy left = 5000 - 2362.5 = 2637.5 cal

The remaining energy is used to heat the liquid

H = mcΔT

Where specific heat of the liquid, c = 0.75 cal/g/°C, H = 2637.5 cal, ΔT = temperature change

2637.5 = 50 × 0.75 x ΔT

ΔT = 2637.5 / ( 50*0.75)

ΔT = 70.3 °C

Final temperature of sample = (70.3 + 27) °C = 97.3 °C

The substance will be in liquid state at a temperature of 97.3 °C

5 0
2 years ago
For this reaction, C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O, the ∆H is –2200 kJ. If two moles of C3H8(g) reacted with excess oxygen,
BartSMP [9]

A) 4400 kj of heat released into surroundings

<h3>Further explanation</h3>

Reaction

C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O, the ∆H is –2200 kJ

Reaction exothermic( ∆H=-, released heat to surrounding) and for combustion of 1 mole of C3H8

So for two moles of C3H8, the enthalpy :

\tt -2200\times 2=-4400~kJ

7 0
2 years ago
What is baking soda chemically known as ? Excessive use of chemical
andreyandreev [35.5K]

Answer:

Baking Soda is NaHCO3 ---Sodium hydrogen Carbonate

Excessive use of Fertilizer can cause plants to develop shallow root systems,Decrease soil fertility and reduce Quality of Crops.

7 0
3 years ago
Read 2 more answers
38 When a sample of a gas is heated in a sealed, rigid container from 200. K to 400. K, the pressure exerted by the gas is
Kryger [21]
Increased by a factor of 200

8 0
3 years ago
Other questions:
  • Which of the following only takes into account distance and time? Question 18 options: displacement velocity speed acceleration
    12·1 answer
  • A wave has a wavelength of 1.2 m and a wave speed of 24 m/s. What is the
    8·2 answers
  • Equal volumes of two monoprotic acid solutions (A and B) are titrated with identical NaOH solutions. The volume to reach the equ
    8·2 answers
  • How could you separate a mixture of rocks and sand?
    9·1 answer
  • Important parts of biological membranes
    5·1 answer
  • What is the velocity of a wave with a wavelength of 0.03 m and a frequency of
    5·2 answers
  • Glucose is one kind of sugar that we get from rice. How many elements does it contain? Use its chemical formula, C6H12O6
    14·1 answer
  • Calculate the mass of hydrogen formed when 26.98 g of aluminum reacts with excess hydrochloric acid according to the following b
    14·1 answer
  • Convert 8.9 miles (mi) to inches (in). 1 mi = 5,280 feet (ft); 1 ft = 12 in
    10·1 answer
  • Plants and animals are both multicellular eukaryotes, but only animals are what?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!