All categories

3 years ago

What can a earthquake do

Chemistry

2 answers:

Nana76 [90]3 years ago

5 0

A and d most likely A though

ycow [4]3 years ago

4 0

A or D I think but go with A it makes more since

You might be interested in

How many microliters are in 7.4 x 10^-61 centimeters?

schepotkina [342]

Answer:

Microliters = $7.4\times 10^{-58}$

Explanation:

SI unit of volume is liter.

$1 dm^{3}=1 liter$ ..............................(1)

1dm=10cm

$1dm^{3} = 1000 cm^{3}$ .................(2)

replacing value of $1 dm^{3}$ from equation (1) in equation (2)

$1 liter = 1000 cm^{3}$ ...................(3)

but

$1 liter = 10^{6} microliters$ ....................(4)

replacing value of 1 liter from equation (3) in equation (4)

$1000 cm^{3} = 10^{6} microliters$

on solving further ,we get

$1 cm^{3} = \frac{10^{6}}{10^{3}}microliter$

$1 cm^{3} = 1000 microliter$

$7.4\times 10^{-61}\times 1000$

Microliters = $7.4\times 10^{-58}$

8 0

3 years ago

Increasing which factor will cause the gravitational force between two objects to decrease?

Drupady [299]

Answer:

mass increase!

Explanation:

5 0

2 years ago

CAN SOMEONE PLEASE HELP ME ??!!!!!!

melamori03 [73]

Answer:

The Resource Conservation and Recovery Act (RCRA; PL 94-580), the major federal law on waste disposal, was passed in 1976. Its primary goal was to "protect human health and the environment from the potential hazards of waste disposal." RCRA is also concerned with reducing the amount of waste generated, ensuring that wastes are managed properly, and conserving natural resources and energy. The RCRA regulates solid waste, hazardous waste, and underground storage tanks

Explanation:

5 0

3 years ago

In the laboratory, hydrogen gas is usually made by the following reaction: Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) How many liters

IrinaK [193]

<u>Answer:</u> The volume of hydrogen gas collected over water is 2.13 L

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of zinc = 5.566 g

Molar mass of zinc = 65.4 g/mol

Putting values in above equation, we get:

$\text{Moles of zinc}=\frac{5.566g}{65.4g/mol}=0.0851mol$

For the given chemical reaction:

$Zn(s)+2HCl(aq.)\rightarrow H_2(g)+ZnCl_2(aq.)$

As, HCl is present in excess. So, it is considered as an excess reagent.

Zinc is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of zinc produces 1 mole of hydrogen gas.

So, 0.0851 moles of zinc will produce = $\frac{1}[1}\times 0.0851=0.0851mol$ of hydrogen gas

To calculate the volume of hydrogen gas, we use ideal gas equation, which is:

PV = nRT

where,

P = Pressure of hydrogen gas = Total atmospheric pressure - vapor pressure of water = (752 - 18.65) mmHg = 733.35 mmHg

V = Volume of the hydrogen gas

n = number of moles of gas = 0.0851 moles

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of hydrogen gas = $21^oC=[21+273]K=294K$

Putting values in above equation, we get:

$733.35mmHg\times V=0.0851mol\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 294K\\\\V=\frac{0.0851\times 62.3637\times 294}{733.35}=2.13L$

Hence, the volume of hydrogen gas collected over water is 2.13 L

5 0

3 years ago

Name a sensory organ, and briefly explain its function.

Sveta_85 [38]

Your nose is a sensory organ and it’s function is to be able to smell chemicals, it cleans the air you breathe, it regulates the temp of the air you breathe, and it’s the main route for your breathing.

6 0

3 years ago