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3 years ago

The speedometer in a car does not measure the car’s velocity because velocity is

Chemistry

2 answers:

dusya [7]3 years ago

6 0

Answer:

because velocity is a vector quantity and has direction associated with it

Explanation:

LekaFEV [45]3 years ago

4 0

Answer is (A) vector is quantity and has a direction associated with it

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A nitrde ion has 7protons,8nutrons and 10 electrons. what is the overall change

Rama09 [41]

Answer:

the overall charge on the nitride anion is

( 3 − ) .

N power 3 − → the nitride anion

6 0

2 years ago

\The specific heat of aluminum is 0.21 cal g°C . How much heat is released when a 10 gram piece of aluminum foil is taken out of

atroni [7]

Answer: The amount of heat released is 84 calories.

Explanation:

The equation used to calculate the amount of heat released or absorbed, we use the equation:

$Q= m\times c\times \Delta T$

where,

Q = heat gained or released = ? Cal

m = mass of the substance = 10g

c = specific heat of aluminium = 0.21 Cal/g ° C

Putting values in above equation, we get:

$\Delta T={\text{Change in temperature}}=(10-50)^oC=-40^oC$

$Q=10g\times 0.21Cal/g^oC\times-40^oC$

Q = -84 Calories

Hence, the amount of heat released is 84 calories.

8 0

3 years ago

Which of the following pairs of reactants will react together to produce water (H2O) as one of the products?

Rainbow [258]

1) NaNO3 and H2O - no reaction , it is dissolution
2) no hydrogen to make water
3) Fe(OH)3 (base) and H2SO4(acid))
base +acid ----> salt +water
4) Li2O and Ba(OH)2
basic oxide and base ----> no reaction

so Answer number 3)
 2Fe(OH)3 +3 H2SO4 ------> Fe2(SO4)3 + 6H2O

7 0

3 years ago

Read 2 more answers

What is a major difference between a chemical reaction and a nuclear reaction? A) Only chemical reactions release light. B) Only

zhuklara [117]

I think it is C. its the only one that makes sense

5 0

3 years ago

Read 2 more answers

? Answer the question below. Type your response in the space provided. What volume of a 2.5 M stock solution of acetic acid (HC2

Novay_Z [31]

Data:
$M_{concentrated} = 2.5\:mol$
$V_{concentrated} = ?$
$M_{dilute} = 0.50\:mol$
$V_{dilute} = 100\:mL\to0.100\:L$

Formula: Dilution Calculations

 $M_{concentrated} * V_{concentrated} = M_{dilute} * V_{dilute}$

Solving:


$M_{concentrated} * V_{concentrated} = M_{dilute} * V_{dilute}$
$2.5 * V_{concentrated} = 0.50 * 0.100$
$2.5V_{concentrated} = 0.05$
$V_{concentrated} = \frac{0.05}{2.5}$
$\boxed{\boxed{V_{concentrated} = 0.02\:L\:or\:20\:mL}} \end{array}}\qquad\quad\checkmark$

3 0

3 years ago