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3 years ago

How does temperature affect the state of matter

1 answer:

8 0

Temperature is very important if ice gets too hot it turns to water, if it gets even hotter it turns to gas.

but if it’s too cold water can turn into ice

Temperature determines what state of matter something is

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Si desea preparar 300 gramos de una solución de azúcar en agua que tenga una concentración de 20% m/m en cuanto gramos de soluto

Digiron [165]

Answer:

$m_{soluto}=60g$

Explanation:

¡Hola!

En este caso, al considerar la unidad de concentración de porcentaje masa/masa, podemos escribir su fórmula como:

$\%m/m=\frac{m_{soluto}}{m_{solucion}}*100\%$

Podemos identificar la masa de soluto (azúcar) como la incógnita, y resolverla como se muestra a continuación:

$m_{soluto}=\frac{\%m/m*m_{solucion}}{100\%}\\\\m_{soluto}=\frac{20\%*300g}{100\%}\\\\m_{soluto}=60g$

¡Saludos!

5 0

3 years ago

What coefficient for O2 demonstrates the law of conservation of mass?

olga2289 [7]

Answer:

Explanation:

The coefficient for O is 2 and this is an example of a combustion reaction. With the help of the coefficient 2 infront of oxygen, this equation now demonstrates law of conservation of mass.

6 0

3 years ago

3. The doctor notices that Janet has long fingernails, and comments that fingernails grow at a rate (or

Viktor [21]

Answer:

7.93 × 10⁻¹³ km/s

Explanation:

Step 1: Given data

Rate of growth of the fingernails (r): 2.50 cm/year

Step 2: Convert "r" from cm/year to km/year

We will use the following conversion factors.

1 m = 100 cm

1 km = 1000 m

$\frac{2.50cm}{year} \times \frac{1m}{100cm} \times \frac{1km}{1000m} = 2.50 \times 10^{-5} km/year$

Step 3: Convert "r" from km/year to km/s

We will use the following conversion factors.

1 year = 365 day

1 day = 24 h

1 h = 60 min

1 min = 60 s

$\frac{2.50 \times 10^{-5} km}{year} \times \frac{1year}{365day} \times \frac{1day}{24h} \times \frac{1h}{60min} \times \frac{1min}{60s} = 7.93 \times 10^{-13} km/s$

2.50 cm/year is equal to 7.93 × 10⁻¹³ kilometers/second.

6 0

2 years ago

What is the mass number for an element that has 62 protons, 85 neutrons, and 62 electrons

Nata [24]

Answer:

The elements mass number is 147

Explanation:

5 0

3 years ago

During the action of a sodium-potassium pump, 50 ATP molecules were spent. Predict how many sodium ions are transported across t

geniusboy [140]

I think the correct answer from the choices listed above is option C. There would be 150 sodium ions that will be transported across the cell membrane. Each ATP molecule aids in moving 3 Na+ across the membrane. So, 50 times 3 is equal to 150.

8 0

3 years ago