All categories

3 years ago

If you throw a ball into the air, the force of ________ makes the ball fall back toward Earth.

Chemistry

2 answers:

larisa86 [58]3 years ago

7 0

B.) gravity
Explanation: gravity makes sense

Tanya [424]3 years ago

6 0

Acceleration is when something is being moved forward or back, motion is just movement, friction is two or more things rubbing together, so the answer should be B. gravity

You might be interested in

Zeke is on spring break. He lives in a cold climate, so he decides to drive to a warmer climate. Before he leaves for his vacati

STatiana [176]

The warmer temperatures at Zeke's destination caused the volume of air in his tires to increase.

4 0

3 years ago

Read 2 more answers

A What does the data tell us? Using the storm data and the computer model, check all statements that are true.

ioda

I think the answer is a. and d.

hope this helps!!

3 0

3 years ago

Read 2 more answers

When 1.045 g of CaO is added to 50.0 mL of water at 25.0 °C in a calorimeter, the temperature of the water increases to 32.3 °C.

Rus_ich [418]

Answer:

1.71 kJ/mol

Explanation:

The expression for the calculation of the enthalpy change of a process is shown below as:-

$\Delta H=m\times C\times \Delta T$

Where,

$\Delta H$ is the enthalpy change

m is the mass

C is the specific heat capacity

$\Delta T$ is the temperature change

Thus, given that:-

Mass of CaO = 1.045 g

Specific heat = 4.18 J/g°C

$\Delta T=32.3-25.0\ ^0C=7.3\ ^0C$

So,

$\Delta H=1.045\times 4.18\times 7.3\ J=31.88713\ J$

Also, 1 J = 0.001 kJ

So,

$\Delta H=0.03189\ kJ$

Also, Molar mass of CaO = 56.0774 g/mol

$Moles=\frac{Mass}{Molar\ mass}=\frac{1.045}{56.0774}\ mol=0.01863\ mol$

Thus, Enthalpy change in kJ/mol is:-

$\Delta H=\frac{0.03189}{0.01863}\ kJ/mol=1.71\ kJ/mol$

8 0

3 years ago

Which of the following is NOT a binary molecular compound?<br> KI <br> H2s<br> CO<br> CIF3

shutvik [7]

I believe KI is not a a binary molecule.
Your welcome

7 0

3 years ago

Help I. have until 11:59 to hand it in

Sedbober [7]

This chemical reaction can also be written as

2C2H6+7O2-->4CO2+6H2O

This is a chemical reaction because reactants are converted into products. This is the combustion of ethane where ethane and oxygen have been converted into carbon dioxide and water

8 0

2 years ago