3 years ago

Janice ran a 5 km race on Saturday at 0.75 h. What was her speed? HELP MEHHH NOWWWW

Chemistry

2 answers:

a_sh-v [17]3 years ago

4 0

Speed=distance/time. S=5km/.75 h=6.67 kmh

ryzh [129]3 years ago

3 0

Answer

A runner ran 20 miles in 150 minutes. If she runs at that ... run in 15 minutes? How fast is she running in miles per hour? What is her pace in minutes per mile?

Explanation:

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A container of gas has a volume of 280 mL at a temperature of 22 Celsius if the pressure remains constant what is the volume 44

d1i1m1o1n [39]

Answer:

300.9mL

Explanation:

Given parameters:

V₁ = 280mL

T₁ = 22°C

T₂ = 44°C

Unknown:

V₂ = ?

Solution:

To solve this problem, we apply Charles's law;

it is mathematically expressed as;

$\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }$

We need to convert the temperature to kelvin;

T₁ = 22°C = 22 + 273 = 295K

T₂ = 44°C = 44 + 273 = 317K

Input the parameters and solve;

$\frac{280}{295}$ = $\frac{V_{2} }{317}$

V₂ x 295 = 280 x 317

V₂ = 300.9mL

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3 years ago

statement 1,mass is conserved durning the reaction. statement 2 sum of mass and energy is conserved durning the reaction. which

maksim [4K]

Answer:

Explanation:

None of the statement is true for both chemical and nuclear reactions. In chemical reactions, mass is always conserved and the type of atoms are also conserved.

6 0

3 years ago

Which of the following is the most likeley example of an favorable mutation

Lana71 [14]

A mutation that gives a rabbit a third ear

8 0

3 years ago

12) _Na+ _H2O → ___ NaOH + __H2

TEA [102]

Answer:

Explanation:

2 Na+ 2 H2O → 2 NaOH + 1 H2