All categories

3 years ago

Which statement is true about your mass?

Chemistry

1 answer:

ziro4ka [17]3 years ago

8 0

the answer isn't A, it is D, You would have the same mass on the Earth and moon

You might be interested in

Could someone please help me with this chemistry question I will mark the correct answer as brainliest

Arisa [49]

It is 95% ethanol and 5%water
I’m pretty sure hope you get it right!
:)

8 0

3 years ago

2 atm of pressure would be equal to ____________ mmHg.

Ahat [919]

Answer:

1520 mmHg

Explanation:

Let's solve this by a factor conversion:

1 atm → 760 mmHg

2 atm . 760 mmHg / 1 atm = 1520 mmHg

5 0

3 years ago

A guy swam a 50 meter freestyle in 21.93 seconds. How fast is this in miles per hour?

lara [203]

Answer:

<h2>Speed = 5.107 mile/hr</h2>

Explanation:

<h3>Given:</h3>

distance =50m = 0.0311 mile

Time= 21.93 seconds/3600 =0.00609 hour

Speed=?

<h3>Speed= Distance / Time </h3><h3> = 0.0311 / 0.00609</h3><h3> = 5.107 mile/hr</h3>

5 0

3 years ago

Caluclate the volume of0,25 mol dm -^3 hydrochloric acid required to neutralize 2.0 dm^3 of 0,15 mol dm-^3 barium hydroxide

inessss [21]

Answer:

2.4 dm-3

Explanation:

Equation of the reaction;

2HCl(aq) + Ba(OH)2(aq) -------> BaCl2(aq) + 2 H2O(l)

Volume of acid VA = ??

Concentration of acid CA = 0.25 moldm-3

Volume of base VB = 2.0 dm^3

Concentration of base CB = 0.15 moldm-3

Number of moles of acid NA = 2

Number of moles of base NB = 1

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

VA = CBVBNA/CANB

VA = 0.15 * 2 * 2/0.25 *1

VA = 2.4 dm-3

4 0

3 years ago

Read 2 more answers

Balance the following equations:

Brilliant_brown [7]

Answer:

1) 0 C2H4O2 + 0 O2 -> 0 CO2 + 0 H2O (balanced)

2) V2O5 + CaS -> CaO + V2S5

just additional info: V2O5 is divanadium pentaoxide

LHS (Left hand side)

V: 2

O: 5

Ca: 1

S: 1 x 5 [to balance with the right hand side of the equation]

RHS (Right hand side)

V: 2

O: 1 x 5 [to balance with the left hand side of the equation]

Ca: 1

S: 5

When you balance any elements, you have to balance the whole chemical compound.

Thus,

V2O5 + 5 CaS -> 5 CaO + V2S5

LHS CHECK:

V: 2

O: 5

Ca: 5

S: 5

RHS CHECK:

V: 2

O: 5

Ca: 5

S: 5

3) S8 + O2 -> SO2

LHS:

S: 8

O: 2

RHS:

S: 1 x 8 [to balance with LHS]

O: 2

When you balance any elements, you have to balance the whole chemical compound.

S8 + O2 -> 8 SO2

When we add 8 to the RHS, it gives us 8S, 16 O.

In order to balance that into the RHS, I need to multiply the O2 by 8, which will give 8(O2) = 16 O particles.

Therefore, S8 + 8 O2 -> 8 SO2 is the final answer for (3).

6 0

3 years ago